- websocket client on ESP32

- telemetry protocol builder
- server-side message handling
- database migrations
- telemetry persistence

backend/build.gradle.kts

@@ -16,14 +16,31 @@ dependencies {
     implementation("io.ktor:ktor-server-content-negotiation:2.3.7")
     implementation("io.ktor:ktor-serialization-kotlinx-json:2.3.7")
     implementation("io.ktor:ktor-server-websockets:2.3.7")
-
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.2")
-
     implementation("ch.qos.logback:logback-classic:1.4.14")
-
+    implementation("org.mariadb.jdbc:mariadb-java-client:3.3.3")
+    implementation("com.zaxxer:HikariCP:5.1.0")
     testImplementation(kotlin("test"))
 }
 
 application {
     mainClass.set("org.pavloveugene.iot.backend.ApplicationKt")
 }
+
+tasks.jar {
+    manifest {
+        attributes["Main-Class"] = "org.pavloveugene.iot.backend.ApplicationKt"
+    }
+
+    from({
+        configurations.runtimeClasspath.get().map { zipTree(it) }
+    })
+
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}
+
+tasks.processResources {
+    from("../db/migrations") {
+        into("db/migration")
+    }
+}

backend/src/main/kotlin/org/pavloveugene/iot/backend/Application.kt

@@ -10,15 +10,22 @@ import io.ktor.server.websocket.*
 import org.pavloveugene.iot.backend.config.AppConfig
 import org.pavloveugene.iot.backend.config.configureSerialization
 import org.pavloveugene.iot.backend.config.configureWebSockets
+import org.pavloveugene.iot.backend.db.Database
+import org.pavloveugene.iot.backend.db.Migration
+import org.pavloveugene.iot.backend.db.runMigrations
 import java.time.Duration
 import org.pavloveugene.iot.backend.routes.*
 
 fun main() {
-    embeddedServer(
+    Database.dataSource
+
+    runMigrations()
+
+    val server = embeddedServer(
         Netty,
         port = AppConfig.serverPort,
         host = AppConfig.serverHost,
-    ){
+    ) {
         install(ContentNegotiation) {
             json()
         }
@@ -34,7 +41,16 @@ fun main() {
             protocolRoutes()
             protocolWebSocket()
         }
-    }.start(wait = true)
+    }
 
+    Runtime.getRuntime().addShutdownHook(Thread {
+        println("Shutting down...")
+        try {
+            server.stop(1000, 2000)
+        } catch (e: Exception) {
+            println("Shutdown error: ${e.message}")
+        }
+    })
 
+    server.start(wait = true)
 }

backend/src/main/kotlin/org/pavloveugene/iot/backend/config/AppConfig.kt

@@ -12,4 +12,9 @@ object AppConfig {
 
     val apiPrefix: String = config.getString("api.prefix")
     val wsPath: String = config.getString("ws.path")
+
+    val dbUrl = config.getString("ktor.database.url")
+    val dbUser = config.getString("ktor.database.user")
+    val dbPassword = config.getString("ktor.database.password")
+
 }

backend/src/main/kotlin/org/pavloveugene/iot/backend/db/Database.kt

@@ -0,0 +1,28 @@
+package org.pavloveugene.iot.backend.db
+
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import org.pavloveugene.iot.backend.config.AppConfig
+import kotlin.getValue
+
+object Database {
+
+    val dataSource: HikariDataSource by lazy {
+        val config = HikariConfig().apply {
+            jdbcUrl = AppConfig.dbUrl
+            driverClassName = "org.mariadb.jdbc.Driver"
+            username = AppConfig.dbUser
+            password = AppConfig.dbPassword
+
+            maximumPoolSize = 10
+            minimumIdle = 2
+            connectionTimeout = 10000
+            idleTimeout = 30000
+            maxLifetime = 1800000
+
+            isAutoCommit = false
+        }
+
+        HikariDataSource(config)
+    }
+}

backend/src/main/kotlin/org/pavloveugene/iot/backend/db/Migration.kt

@@ -0,0 +1,123 @@
+package org.pavloveugene.iot.backend.db
+
+data class Migration(
+    val version: Int,
+    val sql: String
+)
+
+fun loadMigrations(): List<Migration> {
+    val cl = Thread.currentThread().contextClassLoader
+
+    val resources = cl.getResources("db/migration")
+    val result = mutableListOf<Migration>()
+
+    while (resources.hasMoreElements()) {
+        val url = resources.nextElement()
+
+        val uri = url.toURI()
+
+        if (uri.scheme == "file") {
+            // обычный запуск из IDE
+            val dir = java.nio.file.Paths.get(uri)
+
+            java.nio.file.Files.list(dir).forEach { path ->
+                val name = path.fileName.toString()
+                val m = parseMigrationName(name) ?: return@forEach
+
+                val sql = java.nio.file.Files.readString(path)
+                result.add(Migration(m, sql))
+            }
+        } else if (uri.scheme == "jar") {
+            // запуск из jar
+            val fs = java.nio.file.FileSystems.newFileSystem(uri, emptyMap<String, Any>())
+            val dir = fs.getPath("db/migration")
+
+            java.nio.file.Files.list(dir).forEach { path ->
+                val name = path.fileName.toString()
+                val m = parseMigrationName(name) ?: return@forEach
+
+                val sql = java.nio.file.Files.readString(path)
+                result.add(Migration(m, sql))
+            }
+        }
+    }
+
+    return result.sortedBy { it.version }
+}
+
+fun parseMigrationName(name: String): Int? {
+    val regex = Regex("""V(\d+)__.*\.sql""")
+    val match = regex.matchEntire(name) ?: return null
+    return match.groupValues[1].toInt()
+}
+
+fun runMigrations() {
+    val ds = Database.dataSource
+
+    ds.connection.use { conn ->
+
+        // создаём таблицу
+        conn.createStatement().use {
+            it.execute("""
+                CREATE TABLE IF NOT EXISTS schema_migrations (
+                    version INT PRIMARY KEY,
+                    applied_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+                )
+            """.trimIndent())
+        }
+
+        // читаем применённые
+        val applied = mutableSetOf<Int>()
+
+        conn.createStatement().use { st ->
+            val rs = st.executeQuery("SELECT version FROM schema_migrations")
+            while (rs.next()) {
+                applied.add(rs.getInt(1))
+            }
+        }
+
+        val migrations = loadMigrations()
+
+        for (m in migrations) {
+            if (m.version in applied) continue
+
+            println("Applying migration V${m.version}")
+
+            try {
+                conn.autoCommit = false
+
+                val statements = splitSql(m.sql)
+
+                for (stmt in statements) {
+
+                    println("Applying migration statement:\n $stmt\n========================")
+
+                    conn.createStatement().use { st ->
+                        st.execute(stmt)
+                    }
+                }
+
+                conn.prepareStatement(
+                    "INSERT INTO schema_migrations(version) VALUES (?)"
+                ).use {
+                    it.setInt(1, m.version)
+                    it.executeUpdate()
+                }
+
+                conn.commit()
+            } catch (e: Exception) {
+                conn.rollback()
+                throw RuntimeException("Migration V${m.version} failed", e)
+            } finally {
+                conn.autoCommit = true
+            }
+        }
+    }
+}
+
+fun splitSql(sql: String): List<String> {
+    return sql
+        .split(";")
+        .map { it.trim() }
+        .filter { it.isNotEmpty() }
+}

backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/BaseMessageDto.kt

@@ -1,15 +1,23 @@
 package org.pavloveugene.iot.backend.dto
 
+import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
-import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.JsonElement
 
 
 @Serializable
 data class BaseMessageDto(
     val v: Int,
-    val id: String,
+    val id: UInt,
-    val type: String,
+    val t: MessageType,
     val ts: Long,
-    val deviceId: String,
+    val d: UInt,
-    val payload: JsonObject
+    val p: JsonElement
 )
+
+@Serializable
+enum class MessageType {
+    @SerialName("t") TELEMETRY,
+    @SerialName("e") EVENT,
+    @SerialName("c") COMMAND
+}

backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/MessageDto.kt

@@ -0,0 +1,20 @@
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonElement
+
+@kotlinx.serialization.Serializable
+data class MessageDto(
+    val v: Int,
+    val id: UInt,
+    val t: MessageType,
+    val ts: Long,
+    val d: UInt,
+    val p: JsonElement
+)
+
+@Serializable
+enum class MessageType {
+    @SerialName("t") TELEMETRY,
+    @SerialName("e") EVENT,
+    @SerialName("c") COMMAND
+}

backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/TelemetryDto.kt

@@ -0,0 +1,11 @@
+package org.pavloveugene.iot.backend.dto
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class TelemetryDto(
+val m: String,
+val s: String,
+val u: String,
+val v: List<List<Double>>
+)

backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/TelemetryPayloadDto.kt

@@ -1,10 +0,0 @@
-package org.pavloveugene.iot.backend.dto
-
-import kotlinx.serialization.Serializable
-
-@Serializable
-data class TelemetryPayloadDto(
-    val voltage: Double? = null,
-    val current: Double? = null,
-    val power: Double? = null
-)

backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolRoutes.kt

@@ -1,12 +1,16 @@
 package org.pavloveugene.iot.backend.routes
 
+import MessageDto
 import io.ktor.server.application.*
 import io.ktor.server.request.*
 import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import io.ktor.http.*
+import kotlinx.serialization.json.Json
+import org.pavloveugene.iot.backend.dto.TelemetryDto
+import kotlinx.serialization.json.decodeFromJsonElement
 import org.pavloveugene.iot.backend.config.AppConfig
-import org.pavloveugene.iot.backend.dto.ProtocolMessage
+import org.pavloveugene.iot.backend.services.ProtocolService
 
 fun Route.protocolRoutes() {
     route(AppConfig.apiPrefix+"/protocol") {
@@ -15,10 +19,17 @@ fun Route.protocolRoutes() {
         }
 
         post("/message") {
-            val message = call.receive<ProtocolMessage>()
+            val json = Json {
-            // TODO: обработка сообщения
+                ignoreUnknownKeys = false
-            println("Received message: $message")
+            }
-            call.respond(HttpStatusCode.Accepted, mapOf("received" to message.id))
+
+            val protocolService = ProtocolService(json)
+
+            val msg = call.receive<MessageDto>()
+
+            protocolService.handleMessage(msg)
+
+            call.respond(HttpStatusCode.Accepted)
         }
     }
 }

backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolWebSocket.kt

@@ -1,10 +1,12 @@
 package org.pavloveugene.iot.backend.routes
 
+import MessageDto
 import io.ktor.server.websocket.*
 import io.ktor.server.routing.*
 import io.ktor.websocket.*
 import io.ktor.server.application.*
 import io.ktor.server.response.*
+import io.ktor.utils.io.CancellationException
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.decodeFromString
@@ -12,37 +14,57 @@ import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.encodeToJsonElement
 import org.pavloveugene.iot.backend.config.AppConfig
 import org.pavloveugene.iot.backend.dto.ProtocolMessage
+import org.pavloveugene.iot.backend.dto.TelemetryDto
+import org.pavloveugene.iot.backend.services.ProtocolService
+import java.io.IOException
 import java.time.Duration
 
 fun Route.protocolWebSocket() {
-    val json = Json { prettyPrint = true }
+    val json = Json {
+        ignoreUnknownKeys = false
+    }
+
+    val protocolService = ProtocolService(json)
 
     webSocket(AppConfig.wsPath) {
-        send("Connected to IoT backend WebSocket")
+        println("WS connected")
 
-        for (frame in incoming) {
+        try {
-            when (frame) {
+            for (frame in incoming) {
-                is Frame.Text -> {
+                if (frame is Frame.Text) {
                     val text = frame.readText()
-                    try {
+
-                        val message = json.decodeFromString<ProtocolMessage>(text)
+                    val msg = try {
-                        println("Received WS message: $message")
+                        json.decodeFromString<MessageDto>(text)
-                        // Эхо обратно
-                        val response = ProtocolMessage(
-                            v = message.v,
-                            id = message.id,
-                            type = "response",
-                            ts = System.currentTimeMillis(),
-                            deviceId = message.deviceId,
-                            payload = JsonObject(mapOf("status" to Json.encodeToJsonElement("ok")))
-                        )
-                        send(json.encodeToString(response))
                     } catch (e: Exception) {
-                        send("Invalid message format: ${e.message}")
+                        println("WS decode error: ${e.message}")
+                        safeSend("""{"error":"invalid"}""")
+                        continue
+                    }
+
+                    try {
+                        protocolService.handleMessage(msg)
+                    } catch (e: Exception) {
+                        println("WS handler error: ${e.message}")
                     }
                 }
-                else -> {}
             }
+        } catch (e: CancellationException) {
+            // нормальный shutdown — молчим
+        } catch (e: IOException) {
+            println("WS disconnected: ${e.message}")
+        } catch (e: Exception) {
+            println("WS error: ${e.message}")
+        } finally {
+            println("WS disconnected")
         }
     }
 }
+
+suspend fun DefaultWebSocketServerSession.safeSend(text: String) {
+    try {
+        send(text)
+    } catch (_: Exception) {
+        // ignore
+    }
+}

backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/Routing.kt

@@ -1,15 +1,31 @@
 package org.pavloveugene.iot.backend.routes
 
+import io.ktor.http.HttpStatusCode
 import io.ktor.server.application.*
 import io.ktor.server.response.*
 import io.ktor.server.routing.*
+import org.pavloveugene.iot.backend.db.Database
 
 fun Application.configureRouting() {
     routing {
         get("/api/v1/health") {
-            call.respond(mapOf(
+            try {
-                "status" to "ok"
+                Database.dataSource.connection.use { conn ->
-            ))
+                    conn.createStatement().execute("SELECT 1")
+                }
+                call.respondText("OK")
+            } catch (e: Exception) {
+                call.respond(HttpStatusCode.InternalServerError, "DB ERROR")
+            }
+        }
+        get("/api/v1/ready") {
+            // например:
+            // - миграции применены
+            // - WS сервис готов
+            call.respondText("READY")
+        }
+        get("/live") {
+            call.respondText("ALIVE")
         }
     }
 }

backend/src/main/kotlin/org/pavloveugene/iot/backend/services/ProtocolService.kt

@@ -0,0 +1,100 @@
+package org.pavloveugene.iot.backend.services
+
+import MessageDto
+import kotlinx.serialization.builtins.ListSerializer
+import kotlinx.serialization.builtins.serializer
+import kotlinx.serialization.json.Json
+import org.pavloveugene.iot.backend.db.Database
+import org.pavloveugene.iot.backend.dto.TelemetryDto
+
+class ProtocolService(
+    private val json: Json
+) {
+
+    fun handleMessage(msg: MessageDto) {
+        when (msg.t) {
+            MessageType.TELEMETRY -> {
+                handleTelemetry(msg)
+            }
+
+            MessageType.EVENT -> {
+                println("=== EVENT ===")
+                println(msg.p)
+            }
+
+            MessageType.COMMAND -> {
+                println("=== COMMAND ===")
+                println(msg.p)
+            }
+        }
+    }
+
+    fun handleTelemetry(msg: MessageDto) {
+        val ds = Database.dataSource
+
+        ds.connection.use { conn ->
+            conn.autoCommit = false
+
+            try {
+                // ensure device
+                conn.prepareStatement("""
+                INSERT INTO devices(id)
+                VALUES (?)
+                ON DUPLICATE KEY UPDATE id = id
+            """).use {
+                    it.setLong(1, msg.d.toLong())
+                    it.executeUpdate()
+                }
+
+                // check enabled
+                val isEnabled = conn.prepareStatement("""
+                SELECT is_enabled FROM devices WHERE id = ?
+            """).use {
+                    it.setLong(1, msg.d.toLong())
+                    val rs = it.executeQuery()
+                    if (rs.next()) rs.getBoolean(1) else false
+                }
+
+                if (!isEnabled) {
+                    println("device ${msg.d} locked, message ignored")
+                    conn.commit()
+                    return
+                }
+
+                val payload = json.decodeFromJsonElement(TelemetryDto.serializer(), msg.p)
+
+                println("=== TELEMETRY ===")
+                println("device=${msg.d}")
+                println("ts=${msg.ts}")
+                println("metric=${payload.m}")
+                println("values=${payload.v}")
+
+                // insert telemetry
+                conn.prepareStatement("""
+                INSERT INTO telemetry(
+                    device_id, ts, metric, source, unit, payload
+                ) VALUES (?, ?, ?, ?, ?, ?)
+            """).use {
+                    it.setLong(1, msg.d.toLong())
+                    it.setLong(2, msg.ts)
+                    it.setString(3, payload.m)
+                    it.setString(4, payload.s)
+                    it.setString(5, payload.u)
+
+                    val payloadJson = json.encodeToString( ListSerializer(ListSerializer(Double.serializer())),payload.v)
+                    it.setString(6, payloadJson)
+
+                    it.executeUpdate()
+                }
+
+                conn.commit()
+
+            } catch (e: Exception) {
+                conn.rollback()
+                throw e
+            } finally {
+                conn.autoCommit = true
+            }
+        }
+    }
+}

backend/src/main/resources/logback.xml

@@ -1,4 +1,11 @@
-<?xml version="1.0" encoding="UTF-8" ?>
+<configuration>
-<document>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss} %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
 
-</document>
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>

db/migrations/V1__init_protocol.sql

@@ -0,0 +1,20 @@
+CREATE TABLE devices (
+    id BIGINT PRIMARY KEY,
+    is_enabled BOOLEAN NOT NULL DEFAULT TRUE,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE telemetry (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    device_id BIGINT NOT NULL,
+    ts BIGINT NOT NULL,
+    metric VARCHAR(32) NOT NULL,
+    source VARCHAR(64) NOT NULL,
+    unit VARCHAR(16) NOT NULL,
+    payload JSON NOT NULL,
+    processed BOOLEAN NOT NULL DEFAULT FALSE,
+
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (device_id) REFERENCES devices(id)
+);

esp32/dependencies.lock

@@ -0,0 +1,21 @@
+dependencies:
+  espressif/esp_websocket_client:
+    component_hash: c5a067a9fddea370c478017e66fac302f4b79c3d4027e9bdd42a019786cceb92
+    dependencies:
+    - name: idf
+      require: private
+      version: '>=5.0'
+    source:
+      registry_url: https://components.espressif.com/
+      type: service
+    version: 1.6.1
+  idf:
+    source:
+      type: idf
+    version: 6.0.0
+direct_dependencies:
+- espressif/esp_websocket_client
+- idf
+manifest_hash: 68800db522a823ce0f8709ffb9c800760892c2d5889621f1cd9804dc45ae76f9
+target: esp32
+version: 3.0.0

esp32/main/CMakeLists.txt

@@ -1,7 +1,8 @@
 idf_component_register(
         SRCS "main.cpp" "protocol.cpp" "wifi_manager.cpp" "system_init.cpp" "time_sync.cpp" "adc_reader.cpp" "ringbuf.cpp" "sampler_task.cpp" "sender_task.cpp"
+        "ws.cpp"
         INCLUDE_DIRS "."
-        REQUIRES nvs_flash esp_wifi esp_netif freertos log cjson esp_timer esp_adc
+        REQUIRES nvs_flash esp_wifi esp_netif freertos log cjson esp_timer esp_adc esp_websocket_client
 )
 # добавляем кастомный Kconfig
 set(COMPONENT_KCONFIG "Kconfig")

esp32/main/idf_component.yml

@@ -0,0 +1,17 @@
+## IDF Component Manager Manifest File
+dependencies:
+  ## Required IDF version
+  idf:
+    version: '>=4.1.0'
+  # # Put list of dependencies here
+  # # For components maintained by Espressif:
+  # component: "~1.0.0"
+  # # For 3rd party components:
+  # username/component: ">=1.0.0,<2.0.0"
+  # username2/component2:
+  #   version: "~1.0.0"
+  #   # For transient dependencies `public` flag can be set.
+  #   # `public` flag doesn't have an effect dependencies of the `main` component.
+  #   # All dependencies of `main` are public by default.
+  #   public: true
+  espressif/esp_websocket_client: '*'

esp32/main/protocol.cpp

@@ -19,8 +19,59 @@ static inline int append(char* buf, size_t size, int pos, const char* fmt, ...)
     return pos + written;
 }
 
+int build_telemetry(
+    char* buf,
+    size_t buf_size,
+    uint32_t msg_id,
+    int64_t ts,
+    uint32_t device_id,
+    const char* metric,
+    const char* source,
+    const char* unit,
+    const int* values,
+    size_t count
+) {
+    int pos = 0;
+
+    // --- header ---
+    pos = append(buf, buf_size, pos,
+        "{\"v\":1,\"t\":\"t\",\"id\":%lu,\"ts\":%lld,\"d\":%lu,\"p\":{",
+        (unsigned long)msg_id,
+        (long long)ts,
+        (unsigned long)device_id
+    );
+    if (pos < 0) return -1;
+
+    // --- payload meta ---
+    pos = append(buf, buf_size, pos,
+        "\"m\":\"%s\",\"s\":\"%s\",\"u\":\"%s\",\"v\":[",
+        metric,
+        source,
+        unit
+    );
+    if (pos < 0) return -1;
+
+    // --- values ---
+    for (size_t i = 0; i < count; i++) {
+        pos = append(buf, buf_size, pos,
+            "[%u,%d]%s",
+            (unsigned)i,              // delta time (пока просто индекс)
+            values[i],
+            (i < count - 1) ? "," : ""
+        );
+        if (pos < 0) return -1;
+    }
+
+    // --- close ---
+    pos = append(buf, buf_size, pos, "]}}");
+    if (pos < 0) return -1;
+
+    return pos;
+}
+
+__attribute__((deprecated))
 // --- TELEMETRY (single measurement) ---
-int build_telemetry_single(
+    int build_telemetry_single(
     char* buf,
     size_t buf_size,
     const char* id,
@@ -76,6 +127,7 @@ int build_telemetry_single(
     return pos;
 }
 
+__attribute__((deprecated))
 // --- EVENT ---
 int build_event(
     char* buf,

esp32/main/protocol.h

@@ -7,6 +7,19 @@
 extern "C" {
 #endif
 
+int build_telemetry(
+    char* buf,
+    size_t buf_size,
+    uint32_t msg_id,
+    int64_t ts,
+    uint32_t device_id,
+    const char* metric,
+    const char* source,
+    const char* unit,
+    const int* values,
+    size_t count
+);
+
 int build_telemetry_single(
     char* buf,
     size_t buf_size,

esp32/main/sender_task.cpp

@@ -1,9 +1,11 @@
 #include "sender_task.h"
 #include "sampler_task.h"
 #include "ringbuf.h"
+#include "protocol.h"
 
 #include <stdio.h>
 #include <time.h>
+#include "ws.h"
 
 extern "C" {
 #include "freertos/FreeRTOS.h"
@@ -18,21 +20,35 @@ static void sender_task(void *arg) {
     while (1) {
         vTaskDelay(pdMS_TO_TICKS(1000)); // 1 Гц
 
+        char buf[512];
+
         ringbuf_t *rb = sampler_get_buffer();
         ringbuf_copy(rb, data);
 
         time_t now = time(NULL);
 
-        // формируем JSON
+        int len = build_telemetry(
-        printf("{\"v\":1,\"t\":\"t\",\"id\":%lu,\"ts\":%lld,\"d\":1,\"p\":{",
+            buf,
-       (unsigned long)msg_id++, (long long)now);
+            sizeof(buf),
-        printf("\"m\":\"v\",\"s\":\"adc35\",\"u\":\"raw\",\"v\":[");
+            msg_id++,
+            now,
+            1,              // device_id (пока захардкожен)
+            "v",            // metric
+            "adc35",        // source
+            "raw",          // unit
+            data,
+            RINGBUF_SIZE
+        );
 
-        for (int i = 0; i < RINGBUF_SIZE; i++) {
+        if (len > 0) {
-            printf("[%d,%d]%s", i, data[i], (i < RINGBUF_SIZE - 1) ? "," : "");
+            if (ws_is_connected()) {
+                ws_send(buf);
+            } else {
+                printf("%s\n", buf);  // fallback
+            }
+        } else {
+            printf("build_telemetry failed\n");
         }
-
-        printf("]}}\n");
     }
 }
 

esp32/main/system_init.cpp

@@ -6,6 +6,7 @@
 #include "esp_log.h"
 #include "esp_event.h"
 #include "esp_netif.h"
+#include "ws.h"
 
 static const char* TAG = "system";
 
@@ -17,6 +18,7 @@ void system_init()
 
     init_time(); // Установка времени
 
+    ws_go();
 }
 
 void system_finalize()

esp32/main/ws.cpp

@@ -0,0 +1,82 @@
+#include "ws.h"
+#include "esp_websocket_client.h"
+#include "esp_log.h"
+#include <string.h>
+#include "sdkconfig.h"
+
+static const char* TAG = "WS";
+
+static esp_websocket_client_handle_t client = nullptr;
+static bool connected = false;
+
+static void ws_event_handler(void *handler_args,
+                             esp_event_base_t base,
+                             int32_t event_id,
+                             void *event_data)
+{
+    switch (event_id) {
+
+    case WEBSOCKET_EVENT_CONNECTED:
+        connected = true;
+        ESP_LOGI(TAG, "Connected");
+        break;
+
+    case WEBSOCKET_EVENT_DISCONNECTED:
+        connected = false;
+        ESP_LOGI(TAG, "Disconnected");
+        break;
+
+    case WEBSOCKET_EVENT_ERROR:
+        connected = false;
+        ESP_LOGE(TAG, "Error");
+        break;
+
+    case WEBSOCKET_EVENT_DATA: {
+            auto *data = (esp_websocket_event_data_t *)event_data;
+            ESP_LOGI(TAG, "Recv: %.*s", data->data_len, (char*)data->data_ptr);
+            break;
+    }
+    }
+}
+
+void ws_init(const char* uri)
+{
+    esp_websocket_client_config_t config = {};
+    config.uri = uri;
+    config.reconnect_timeout_ms = 5000;
+    config.network_timeout_ms = 5000;
+
+    client = esp_websocket_client_init(&config);
+    esp_websocket_register_events(client, WEBSOCKET_EVENT_ANY, ws_event_handler, NULL);
+}
+
+void ws_start()
+{
+    if (client) {
+        esp_websocket_client_start(client);
+    }
+}
+
+bool ws_is_connected()
+{
+    return connected;
+}
+
+void ws_send(const char* data)
+{
+    if (connected && client) {
+        esp_websocket_client_send_text(client, data, strlen(data), portMAX_DELAY);
+    }
+}
+
+void ws_go()
+{
+    char uri[128];
+
+    snprintf(uri, sizeof(uri),
+             "ws://%s:%d/ws",
+             CONFIG_SERVER_HOST,
+             CONFIG_SERVER_PORT);
+    ws_init(uri);
+    ws_start();
+}

esp32/main/ws.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void ws_init(const char* uri);
+void ws_go();
+void ws_start();
+bool ws_is_connected();
+void ws_send(const char* data);
+
+#ifdef __cplusplus
+}
+#endif

esp32/managed_components/espressif__esp_websocket_client/.component_hash

@@ -0,0 +1 @@
+c5a067a9fddea370c478017e66fac302f4b79c3d4027e9bdd42a019786cceb92

esp32/managed_components/espressif__esp_websocket_client/.cz.yaml

@@ -0,0 +1,8 @@
+---
+commitizen:
+  bump_message: 'bump(websocket): $current_version -> $new_version'
+  pre_bump_hooks: python ../../ci/changelog.py esp_websocket_client
+  tag_format: websocket-v$version
+  version: 1.6.1
+  version_files:
+  - idf_component.yml

esp32/managed_components/espressif__esp_websocket_client/CHANGELOG.md

@@ -0,0 +1,269 @@
+# Changelog
+
+## [1.6.1](https://github.com/espressif/esp-protocols/commits/websocket-v1.6.1)
+
+### Bug Fixes
+
+- Fix race conditions, memory leak, and data loss ([23ca97d5](https://github.com/espressif/esp-protocols/commit/23ca97d5))
+    - Add state check in abort_connection to prevent double-close
+    - Fix memory leak: free errormsg_buffer on disconnect
+    - Reset connection state on reconnect to prevent stale data
+    - Implement lock ordering for separate TX lock mode
+    - Read buffered data immediately after connection to prevent data loss
+    - Added sdkconfig.ci.tx_lock config
+
+## [1.6.0](https://github.com/espressif/esp-protocols/commits/websocket-v1.6.0)
+
+### Features
+
+- add WEBSOCKET_EVENT_HEADER_RECEIVED (#827) ([18f0d028](https://github.com/espressif/esp-protocols/commit/18f0d028), [#715](https://github.com/espressif/esp-protocols/issues/715))
+- enhance example with docs, pytest setup, and standalone test server     - Add comprehensive README with TOC and quick start     - Add pytest setup and certificate generation scripts     - Add standalone WebSocket test server with TLS support     - Add troubleshooting and multiple testing approaches ([cad527d2](https://github.com/espressif/esp-protocols/commit/cad527d2))
+- Add websocket HTTP redirect ([ce1560ac](https://github.com/espressif/esp-protocols/commit/ce1560ac))
+
+### Bug Fixes
+
+- remove redundant timeout check in client task loop ([1e83bee4](https://github.com/espressif/esp-protocols/commit/1e83bee4))
+- fix PING timing - enable periodic PING during active traffic ([7f424325](https://github.com/espressif/esp-protocols/commit/7f424325))
+- Update linux build docs on required libs ([e52a5757](https://github.com/espressif/esp-protocols/commit/e52a5757))
+- clean up component dependencies - Remove unused 'json', 'nvs_flash', 'esp_stubs', dependency from Linux build configuration - Add cJSON dependency to target example's idf_component.yml ([d665e6f1](https://github.com/espressif/esp-protocols/commit/d665e6f1))
+- fix relying on asprintf() to NULL strp on failure ([54eb0027](https://github.com/espressif/esp-protocols/commit/54eb0027))
+- Update Remaining Websocket Echo Server (#893) ([18faeb3d](https://github.com/espressif/esp-protocols/commit/18faeb3d))
+- avoid long stopping time when waiting to auto-reconnect ([2432e41d](https://github.com/espressif/esp-protocols/commit/2432e41d))
+- Update Websocket Echo Server ([94bd5b07](https://github.com/espressif/esp-protocols/commit/94bd5b07))
+
+### Updated
+
+- ci(common): Update test component dir for IDFv6.0 ([18418c83](https://github.com/espressif/esp-protocols/commit/18418c83))
+
+## [1.5.0](https://github.com/espressif/esp-protocols/commits/websocket-v1.5.0)
+
+### Features
+
+- add separate tx lock for send and receive ([250eebf](https://github.com/espressif/esp-protocols/commit/250eebf))
+- add unregister event to websocket client ([ce16050](https://github.com/espressif/esp-protocols/commit/ce16050))
+- add ability to reconnect after close ([19891d8](https://github.com/espressif/esp-protocols/commit/19891d8))
+
+### Bug Fixes
+
+- release client-lock during WEBSOCKET_EVENT_DATA ([030cb75](https://github.com/espressif/esp-protocols/commit/030cb75))
+
+## [1.4.0](https://github.com/espressif/esp-protocols/commits/websocket-v1.4.0)
+
+### Features
+
+- Support DS peripheral for mutual TLS ([55385ec3](https://github.com/espressif/esp-protocols/commit/55385ec3))
+
+### Bug Fixes
+
+- wait for task on destroy ([42674b49](https://github.com/espressif/esp-protocols/commit/42674b49))
+- Fix pytest to verify client correctly ([9046af8f](https://github.com/espressif/esp-protocols/commit/9046af8f))
+- propagate error type ([eeeb9006](https://github.com/espressif/esp-protocols/commit/eeeb9006))
+- fix example buffer leak ([5219c39d](https://github.com/espressif/esp-protocols/commit/5219c39d))
+
+### Updated
+
+- chore(websocket): align structure members ([beb6e57e](https://github.com/espressif/esp-protocols/commit/beb6e57e))
+- chore(websocket): remove unused client variable ([15d3a01e](https://github.com/espressif/esp-protocols/commit/15d3a01e))
+
+## [1.3.0](https://github.com/espressif/esp-protocols/commits/websocket-v1.3.0)
+
+### Features
+
+- add events for begin/end thread ([d7fa24bc](https://github.com/espressif/esp-protocols/commit/d7fa24bc))
+- Make example to use certificate bundle ([aecf6f80](https://github.com/espressif/esp-protocols/commit/aecf6f80))
+- propagate esp_tls stack error and cert verify flags ([234f579b](https://github.com/espressif/esp-protocols/commit/234f579b))
+- Add option to set and use cert_common_name in Websocket client ([3a6720de](https://github.com/espressif/esp-protocols/commit/3a6720de))
+- adding support for `if_name` when using WSS transport ([333a6893](https://github.com/espressif/esp-protocols/commit/333a6893))
+- allow updating reconnect timeout for retry backoffs ([bd9f0627](https://github.com/espressif/esp-protocols/commit/bd9f0627))
+- allow using external tcp transport handle ([83ea2876](https://github.com/espressif/esp-protocols/commit/83ea2876))
+- adding support for `keep_alive_enable` when using WSS transport ([c728eae5](https://github.com/espressif/esp-protocols/commit/c728eae5))
+
+### Bug Fixes
+
+- Prevent crash on network disconnect during send ([a453ca1f](https://github.com/espressif/esp-protocols/commit/a453ca1f))
+- use proper interface to delete semaphore ([991ac40d](https://github.com/espressif/esp-protocols/commit/991ac40d))
+- Move client to different state when disconnecting ([0d8f2a6d](https://github.com/espressif/esp-protocols/commit/0d8f2a6d))
+- fix of websocket host example ([5ccc018a](https://github.com/espressif/esp-protocols/commit/5ccc018a))
+- don't get transport from the list if external transport is used ([9d4d5d2d](https://github.com/espressif/esp-protocols/commit/9d4d5d2d))
+- Fix locking issues of `esp_websocket_client_send_with_exact_opcode` API ([6393fcd7](https://github.com/espressif/esp-protocols/commit/6393fcd7))
+
+## [1.2.3](https://github.com/espressif/esp-protocols/commits/websocket-v1.2.3)
+
+### Features
+
+- Expanded example to demonstrate the transfer over TLS ([0d0630ed76](https://github.com/espressif/esp-protocols/commit/0d0630ed76))
+
+### Bug Fixes
+
+- fix esp_event dependency management ([1fb02a9a60](https://github.com/espressif/esp-protocols/commit/1fb02a9a60))
+- Skip warn on zero timeout and auto reconnect is disabled ([5b467cbf5c](https://github.com/espressif/esp-protocols/commit/5b467cbf5c))
+- Fixed to use int return value in Tx functions ([9c54b72e1f](https://github.com/espressif/esp-protocols/commit/9c54b72e1f))
+- Fixed Tx functions with DYNAMIC_BUFFER ([16174470ee](https://github.com/espressif/esp-protocols/commit/16174470ee))
+- added dependency checks, sdkconfig.defaults and refined README.md ([312982e4aa](https://github.com/espressif/esp-protocols/commit/312982e4aa))
+- Close websocket and dispatch event if server does not close within a reasonable amount of time. ([d85311880d](https://github.com/espressif/esp-protocols/commit/d85311880d))
+- Continue waiting for TCP connection to be closed ([2b092e0db4](https://github.com/espressif/esp-protocols/commit/2b092e0db4))
+
+### Updated
+
+- docs(websocket): Added README for websocket host example ([2f7c58259d](https://github.com/espressif/esp-protocols/commit/2f7c58259d))
+
+## [1.2.2](https://github.com/espressif/esp-protocols/commits/websocket-v1.2.2)
+
+### Bug Fixes
+
+- continuation after FIN in websocket client (#460) ([774d1c75e6](https://github.com/espressif/esp-protocols/commit/774d1c75e6))
+- Re-applie refs to common comps idf_component.yml ([9fe44a4504](https://github.com/espressif/esp-protocols/commit/9fe44a4504))
+
+## [1.2.1](https://github.com/espressif/esp-protocols/commits/websocket-v1.2.1)
+
+### Bug Fixes
+
+- consider failure if return value of `esp_websocket_client_send_with_exact_opcode` less than 0 ([f523b4d](https://github.com/espressif/esp-protocols/commit/f523b4d))
+- fix of return value for `esp_websocket_client_send_with_opcode` API ([ba33588](https://github.com/espressif/esp-protocols/commit/ba33588))
+
+## [1.2.0](https://github.com/espressif/esp-protocols/commits/websocket-v1.2.0)
+
+### Features
+
+- Added new API `esp_websocket_client_append_header` ([39e9725](https://github.com/espressif/esp-protocols/commit/39e9725))
+- Added new APIs to support fragmented messages transmission ([fae80e2](https://github.com/espressif/esp-protocols/commit/fae80e2))
+
+### Bug Fixes
+
+- Reference common component from IDF ([74fc228](https://github.com/espressif/esp-protocols/commit/74fc228))
+- Revert referencing protocol_examples_common from IDF ([b176d3a](https://github.com/espressif/esp-protocols/commit/b176d3a))
+- reference protocol_examples_common from IDF ([025ede1](https://github.com/espressif/esp-protocols/commit/025ede1))
+- specify override_path in example manifests ([d5e7898](https://github.com/espressif/esp-protocols/commit/d5e7898))
+- Return status code correctly on esp_websocket_client_send_with_opcode ([ac8f1de](https://github.com/espressif/esp-protocols/commit/ac8f1de))
+- Fix pytest exclusion, gitignore, and changelog checks ([2696221](https://github.com/espressif/esp-protocols/commit/2696221))
+
+## [1.1.0](https://github.com/espressif/esp-protocols/commits/websocket-v1.1.0)
+
+### Features
+
+- Added linux port for websocket ([a22391a](https://github.com/espressif/esp-protocols/commit/a22391a))
+
+### Bug Fixes
+
+- added idf_component.yml for examples ([d273e10](https://github.com/espressif/esp-protocols/commit/d273e10))
+
+## [1.0.1](https://github.com/espressif/esp-protocols/commits/websocket-v1.0.1)
+
+### Bug Fixes
+
+- esp_websocket_client client allow sending 0 byte packets ([b5177cb](https://github.com/espressif/esp-protocols/commit/b5177cb))
+- Cleaned up printf/format warnings (-Wno-format) ([e085826](https://github.com/espressif/esp-protocols/commit/e085826))
+- Added unit tests to CI + minor fix to pass it ([c974c14](https://github.com/espressif/esp-protocols/commit/c974c14))
+- Reintroduce missing CHANGELOGs ([200cbb3](https://github.com/espressif/esp-protocols/commit/200cbb3), [#235](https://github.com/espressif/esp-protocols/issues/235))
+
+### Updated
+
+- docs(common): updated component and example links ([f48d9b2](https://github.com/espressif/esp-protocols/commit/f48d9b2))
+- docs(common): improving documentation ([ca3fce0](https://github.com/espressif/esp-protocols/commit/ca3fce0))
+- Fix weird error message spacings ([8bb207e](https://github.com/espressif/esp-protocols/commit/8bb207e))
+
+## [1.0.0](https://github.com/espressif/esp-protocols/commits/996fef7)
+
+### Updated
+
+- esp_websocket_client: Updated version to 1.0.0 Updated tests to run agains release-v5.0 ([996fef7](https://github.com/espressif/esp-protocols/commit/996fef7))
+- esp_websocket_client: * Error handling improved to show status code from server * Added new API `esp_websocket_client_set_headers` * Dispatches 'WEBSOCKET_EVENT_BEFORE_CONNECT' event before tcp connection ([d047ff5](https://github.com/espressif/esp-protocols/commit/d047ff5))
+- unite all tags under common structure py test: update tags under common structure ([c6db3ea](https://github.com/espressif/esp-protocols/commit/c6db3ea))
+- websocket: Support HTTP basic authorization ([1b13448](https://github.com/espressif/esp-protocols/commit/1b13448))
+- Add task_name config option ([1d68884](https://github.com/espressif/esp-protocols/commit/1d68884))
+- Add websocket error messages ([d68624e](https://github.com/espressif/esp-protocols/commit/d68624e))
+- websocket: Added new API `esp_websocket_client_destroy_on_exit` ([f9b4790](https://github.com/espressif/esp-protocols/commit/f9b4790))
+- Added badges with version of components to the respective README files ([e4c8a59](https://github.com/espressif/esp-protocols/commit/e4c8a59))
+
+
+## [0.0.4](https://github.com/espressif/esp-protocols/commits/3330b96)
+
+### Updated
+
+- websocket: make `esp_websocket_client_send_with_opcode` a public API ([3330b96](https://github.com/espressif/esp-protocols/commit/3330b96))
+- websocket: updated example to use local websocket echo server ([55dc564](https://github.com/espressif/esp-protocols/commit/55dc564))
+- CI: Created a common requirements.txt ([23a537b](https://github.com/espressif/esp-protocols/commit/23a537b))
+- Examples: using pytest.ini from top level directory ([aee016d](https://github.com/espressif/esp-protocols/commit/aee016d))
+- CI: fixing the files to be complient with pre-commit hooks ([945bd17](https://github.com/espressif/esp-protocols/commit/945bd17))
+- websocket: updated example to show json data transfer ([3456781](https://github.com/espressif/esp-protocols/commit/3456781))
+
+
+## [0.0.3](https://github.com/espressif/esp-protocols/commits/5c245db)
+
+### Updated
+
+- esp_websocket_client: Upgraded version to 0.0.3 ([5c245db](https://github.com/espressif/esp-protocols/commit/5c245db))
+- CI: Fix build issues ([6e4e4fa](https://github.com/espressif/esp-protocols/commit/6e4e4fa))
+
+
+## [0.0.2](https://github.com/espressif/esp-protocols/commits/57afa38)
+
+### Features
+
+- Optimize memory size for websocket client init ([4cefcd3](https://github.com/espressif/esp-protocols/commit/4cefcd3))
+- allow users to attach CA bundle ([d56b5d9](https://github.com/espressif/esp-protocols/commit/d56b5d9))
+
+### Bug Fixes
+
+- Docs to refer esp-protocols ([91a177e](https://github.com/espressif/esp-protocols/commit/91a177e))
+
+### Updated
+
+- Bump asio/mdns/esp_websocket_client versions ([57afa38](https://github.com/espressif/esp-protocols/commit/57afa38))
+- ignore format warnings ([d66f9dc](https://github.com/espressif/esp-protocols/commit/d66f9dc))
+- Minor fixes here and there ([8fe2a3a](https://github.com/espressif/esp-protocols/commit/8fe2a3a))
+- CI: Added CI example run job ([76298ff](https://github.com/espressif/esp-protocols/commit/76298ff))
+- Implement websocket client connect error ([9e37f53](https://github.com/espressif/esp-protocols/commit/9e37f53))
+- Add methods to allow get/set of websocket client ping interval ([e55f54b](https://github.com/espressif/esp-protocols/commit/e55f54b))
+- esp_websocket_client: Expose frame fin flag in websocket event ([b72a9ae](https://github.com/espressif/esp-protocols/commit/b72a9ae))
+
+
+## [0.0.1](https://github.com/espressif/esp-protocols/commits/80c3cf0)
+
+### Updated
+
+- websocket: Initial version based on IDF 5.0 ([80c3cf0](https://github.com/espressif/esp-protocols/commit/80c3cf0))
+- freertos: Remove legacy data types ([b3c777a](https://github.com/espressif/esp-protocols/commit/b3c777a), [IDF@57fd78f](https://github.com/espressif/esp-idf/commit/57fd78f5baf93a368a82cf4b2e00ca17ffc09115))
+- websocket: Added configs `reconnect_timeout_ms` and `network_timeout_ms` ([8ce791e](https://github.com/espressif/esp-protocols/commit/8ce791e), [IDF#8263](https://github.com/espressif/esp-idf/issues/8263), [IDF@6c26d65](https://github.com/espressif/esp-idf/commit/6c26d6520311f83c2ebe852a487c36185a429a69))
+- Add http_parser (new component) dependency ([bece6e7](https://github.com/espressif/esp-protocols/commit/bece6e7), [IDF@8e94cf2](https://github.com/espressif/esp-idf/commit/8e94cf2bb1498e94045e73e649f1046111fc6f9f))
+- websocket: removed deprecated API "esp_websocket_client_send" ([46bd32d](https://github.com/espressif/esp-protocols/commit/46bd32d), [IDF@7f6ab93](https://github.com/espressif/esp-idf/commit/7f6ab93f7e52bddaf4c030d7337ea5574f33381d))
+- refactor (test_utils)!: separate file for memory check functions ([525c70c](https://github.com/espressif/esp-protocols/commit/525c70c), [IDF@16514f9](https://github.com/espressif/esp-idf/commit/16514f93f06cd833306459d615458536a9f2e5cd))
+- Build & config: Remove leftover files from the unsupported "make" build system ([19c0455](https://github.com/espressif/esp-protocols/commit/19c0455), [IDF@766aa57](https://github.com/espressif/esp-idf/commit/766aa5708443099f3f033b739cda0e1de101cca6))
+- transport: Add CONFI_WS_TRANSPORT for optimize the code size ([9118e0f](https://github.com/espressif/esp-protocols/commit/9118e0f), [IDF@8b02c90](https://github.com/espressif/esp-idf/commit/8b02c9026af32352c8c4ed23025fb42182db6cae))
+- ws_client: Fix const correctness in the API config structure ([fbdbd55](https://github.com/espressif/esp-protocols/commit/fbdbd55), [IDF@70b1247](https://github.com/espressif/esp-idf/commit/70b1247a47f4583fccd8a91bf6cc532e5741e632))
+- components: Remove repeated keep alive function by ssl layer function ([de7cd72](https://github.com/espressif/esp-protocols/commit/de7cd72), [IDF@c79a907](https://github.com/espressif/esp-idf/commit/c79a907e4fef0c54175ad5659bc0df45a40745c9))
+- components: Support bind socket to specified interface in esp_http_client and esp_websocket_client component ([4a608ec](https://github.com/espressif/esp-protocols/commit/4a608ec), [IDF@bead359](https://github.com/espressif/esp-idf/commit/bead3599abd875d746e64cd6749574ff2c155adb))
+- esp_websocket_client: Don't log the filename when logging "Websocket already stop" ([f0351ff](https://github.com/espressif/esp-protocols/commit/f0351ff), [IDF@10bde42](https://github.com/espressif/esp-idf/commit/10bde42551b479bd4bfccc9d3c6d983f8abe0b87))
+- websocket: Add websocket unit tests ([9219ff7](https://github.com/espressif/esp-protocols/commit/9219ff7), [IDF@cd01a0c](https://github.com/espressif/esp-idf/commit/cd01a0ca81ef2ba5648fd7712c9bf45bbf252339))
+- websockets: Set keepalive options after adding transport to the list ([86aa0b8](https://github.com/espressif/esp-protocols/commit/86aa0b8), [IDF@99805d8](https://github.com/espressif/esp-idf/commit/99805d880f41857702b3bbb35bc0dfaf7dec3aec))
+- websocket: Add configurable ping interval ([1933367](https://github.com/espressif/esp-protocols/commit/1933367), [IDF@9ff9137](https://github.com/espressif/esp-idf/commit/9ff9137e7a8b64e956c1c63e95a48f4049ad571e))
+- ws_transport: Add option to propagate control packets to the app ([95cf983](https://github.com/espressif/esp-protocols/commit/95cf983), [IDF#6307](https://github.com/espressif/esp-idf/issues/6307), [IDF@acc7bd2](https://github.com/espressif/esp-idf/commit/acc7bd2ca45c21033cbd02220a27c3c1ecdd5ad0))
+- Add options for esp_http_client and esp_websocket_client to support keepalive ([8a6c320](https://github.com/espressif/esp-protocols/commit/8a6c320), [IDF@b53e46a](https://github.com/espressif/esp-idf/commit/b53e46a68e8671c73e8aafe2602de5ff5a77e3db))
+- websocket: support mutual tls for websocket Closes https://github.com/espressif/esp-idf/issues/6059 ([d1dd6ec](https://github.com/espressif/esp-protocols/commit/d1dd6ec), [IDF#6059](https://github.com/espressif/esp-idf/issues/6059), [IDF@5ab774f](https://github.com/espressif/esp-idf/commit/5ab774f9d8e119fff56b566fa2f9bdad853bf701))
+- Whitespace: Automated whitespace fixes (large commit) ([d376480](https://github.com/espressif/esp-protocols/commit/d376480), [IDF@66fb5a2](https://github.com/espressif/esp-idf/commit/66fb5a29bbdc2482d67c52e6f66b303378c9b789))
+- Websocket client: avoid deadlock if stop called from event handler ([e90272c](https://github.com/espressif/esp-protocols/commit/e90272c), [IDF@c2bb076](https://github.com/espressif/esp-idf/commit/c2bb0762bb5c24cb170bc9c96fdadb86ae2f06e7))
+- tcp_transport: Added internal API for underlying socket, used for custom select on connection end for WS ([6d12d06](https://github.com/espressif/esp-protocols/commit/6d12d06), [IDF@5e9f8b5](https://github.com/espressif/esp-idf/commit/5e9f8b52e7a87371370205a387b2d94e5ac6cbf9))
+- ws_client: Added support for close frame, closing connection gracefully ([1455bc0](https://github.com/espressif/esp-protocols/commit/1455bc0), [IDF@b213f2c](https://github.com/espressif/esp-idf/commit/b213f2c6d3d78ba3a95005e3206d4ce370b8a649))
+- driver, http_client, web_socket, tcp_transport: remove __FILE__ from log messages ([01b4f64](https://github.com/espressif/esp-protocols/commit/01b4f64), [IDF#5637](https://github.com/espressif/esp-idf/issues/5637), [IDF@caaf62b](https://github.com/espressif/esp-idf/commit/caaf62bdad965e6b58bba74171986414057f6757))
+-  websocket_client : fix some issues for websocket client ([6ab0aea](https://github.com/espressif/esp-protocols/commit/6ab0aea), [IDF@341e480](https://github.com/espressif/esp-idf/commit/341e48057349d92c3b8afe5f9c0fcd0aa47500b0))
+- websocket: add configurable timeout for PONG not received ([b71c49c](https://github.com/espressif/esp-protocols/commit/b71c49c), [IDF@0049385](https://github.com/espressif/esp-idf/commit/0049385850daebfe2222c8f0526b896ffaeacdd9))
+- websocket client: the client now aborts the connection if send fails. ([f8e3ba7](https://github.com/espressif/esp-protocols/commit/f8e3ba7), [IDF@6bebfc8](https://github.com/espressif/esp-idf/commit/6bebfc84f3ed9c96bcb331fd0d5b0bbb26ce07a4))
+- ws_client: fix fragmented send setting proper opcodes ([7a5b2d5](https://github.com/espressif/esp-protocols/commit/7a5b2d5), [IDF#4974](https://github.com/espressif/esp-idf/issues/4974), [IDF@14992e6](https://github.com/espressif/esp-idf/commit/14992e62c5573d8b6076281f16b4fe11d6bc8f87))
+- esp32: add implementation of esp_timer based on TG0 LAC timer ([17281a5](https://github.com/espressif/esp-protocols/commit/17281a5), [IDF@739eb05](https://github.com/espressif/esp-idf/commit/739eb05bb97736b70507e7ebcfee58e670672d23))
+- tcp_transport/ws_client: websockets now correctly handle messages longer than buffer ([aec6a75](https://github.com/espressif/esp-protocols/commit/aec6a75), [IDF@ffeda30](https://github.com/espressif/esp-idf/commit/ffeda3003c92102d2d5b145c9adb3ea3105cbbda))
+- websocket: added missing event data ([a6be8e2](https://github.com/espressif/esp-protocols/commit/a6be8e2), [IDF@7c0e376](https://github.com/espressif/esp-idf/commit/7c0e3765ec009acaf2ef439e98895598b5fd9aaf))
+- Add User-Agent and additional headers to esp_websocket_client ([a48b0fa](https://github.com/espressif/esp-protocols/commit/a48b0fa), [IDF@9200250](https://github.com/espressif/esp-idf/commit/9200250f512146e348f84ebfc76f9e82e2070da2))
+- ws_client: fix handling timeouts by websocket client. ([1fcc001](https://github.com/espressif/esp-protocols/commit/1fcc001), [IDF#4316](https://github.com/espressif/esp-idf/issues/4316), [IDF@e1f9829](https://github.com/espressif/esp-idf/commit/e1f982921a08022ca4307900fc058ccacccd26d0))
+- websocket_client: fix locking mechanism in ws-client task and when sending data ([d0121b9](https://github.com/espressif/esp-protocols/commit/d0121b9), [IDF@7c5011f](https://github.com/espressif/esp-idf/commit/7c5011f411b7662feb50fd1e53114bec390d8c2e))
+- ws_client: fix for not sending ping responses, updated to pass events also for PING and PONG messages, added interfaces to send both binary and text data ([f55d839](https://github.com/espressif/esp-protocols/commit/f55d839), [IDF@abf9345](https://github.com/espressif/esp-idf/commit/abf9345b85559f4a922e8387f48336fb09994041))
+- websocket_client: fix URI parsing to include also query part in websocket connection path ([f5a26c4](https://github.com/espressif/esp-protocols/commit/f5a26c4), [IDF@271e6c4](https://github.com/espressif/esp-idf/commit/271e6c4c9c57ca6715c1435a71fe3974cd2b18b3))
+- ws_client: fixed posting to event loop with websocket timeout ([23f6a1d](https://github.com/espressif/esp-protocols/commit/23f6a1d), [IDF@5050506](https://github.com/espressif/esp-idf/commit/50505068c45fbe97611be9b7f2c30b8160cbb9e3))
+- ws_client: added subprotocol configuration option to websocket client ([2553d65](https://github.com/espressif/esp-protocols/commit/2553d65), [IDF@de6ea39](https://github.com/espressif/esp-idf/commit/de6ea396f17be820153da6acaf977c1bf11806fb))
+- ws_client: fixed path config issue when ws server configured using host and path instead of uri ([67949f9](https://github.com/espressif/esp-protocols/commit/67949f9), [IDF@c0ba9e1](https://github.com/espressif/esp-idf/commit/c0ba9e19fc6cff79f5760b991c259970bd4abeab))
+- ws_client: fixed transport config option when server address configured as host, port, transport rather then uri ([bfc88ab](https://github.com/espressif/esp-protocols/commit/bfc88ab), [IDF@adee25d](https://github.com/espressif/esp-idf/commit/adee25d90e100a169e959f94db23621f6ffab0e6))
+- esp_wifi: wifi support new event mechanism ([4d64495](https://github.com/espressif/esp-protocols/commit/4d64495), [IDF@003a987](https://github.com/espressif/esp-idf/commit/003a9872b7de69d799e9d37521cfbcaff9b37e85))
+- tools: Mass fixing of empty prototypes (for -Wstrict-prototypes) ([da74a4a](https://github.com/espressif/esp-protocols/commit/da74a4a), [IDF@afbaf74](https://github.com/espressif/esp-idf/commit/afbaf74007e89d016dbade4072bf2e7a3874139a))
+- ws_client: fix double delete issue in ws client initialization ([f718676](https://github.com/espressif/esp-protocols/commit/f718676), [IDF@9b507c4](https://github.com/espressif/esp-idf/commit/9b507c45c86cf491466d705cd7896c6f6e500d0d))
+- ws_client: removed dependency on internal tcp_transport header ([13a40d2](https://github.com/espressif/esp-protocols/commit/13a40d2), [IDF@d143356](https://github.com/espressif/esp-idf/commit/d1433564ecfc885f80a7a261a88ab87d227cf1c2))
+- examples: use new component registration api ([35d6f9a](https://github.com/espressif/esp-protocols/commit/35d6f9a), [IDF@6771eea](https://github.com/espressif/esp-idf/commit/6771eead80534c51efb2033c04769ef5893b4838))
+- esp_websocket_client: Add websocket client component ([f3a0586](https://github.com/espressif/esp-protocols/commit/f3a0586), [IDF#2829](https://github.com/espressif/esp-idf/issues/2829), [IDF@2a2d932](https://github.com/espressif/esp-idf/commit/2a2d932cfe2404057c71bc91d9d9416200e67a03))

esp32/managed_components/espressif__esp_websocket_client/CMakeLists.txt

@@ -0,0 +1,21 @@
+idf_build_get_property(target IDF_TARGET)
+
+if(NOT CONFIG_WS_TRANSPORT AND NOT CMAKE_BUILD_EARLY_EXPANSION)
+    message(STATUS "Websocket transport is disabled so the esp_websocket_client component will not be built")
+    # note: the component is still included in the build so it can become visible again in config
+    # without needing to re-run CMake. However no source or header files are built.
+    idf_component_register()
+    return()
+endif()
+
+if(${IDF_TARGET} STREQUAL "linux")
+	idf_component_register(SRCS "esp_websocket_client.c"
+                    INCLUDE_DIRS "include"
+                    REQUIRES esp-tls tcp_transport http_parser esp_event
+                    PRIV_REQUIRES esp_timer)
+else()
+    idf_component_register(SRCS "esp_websocket_client.c"
+                    INCLUDE_DIRS "include"
+                    REQUIRES lwip esp-tls tcp_transport http_parser esp_event
+                    PRIV_REQUIRES esp_timer)
+endif()

esp32/managed_components/espressif__esp_websocket_client/LICENSE

@@ -0,0 +1,202 @@
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esp32/managed_components/espressif__esp_websocket_client/README.md

@@ -0,0 +1,13 @@
+# ESP WEBSOCKET CLIENT
+
+[![Component Registry](https://components.espressif.com/components/espressif/esp_websocket_client/badge.svg)](https://components.espressif.com/components/espressif/esp_websocket_client)
+
+The `esp-websocket_client` component is a managed component for `esp-idf` that contains implementation of [WebSocket protocol client](https://datatracker.ietf.org/doc/html/rfc6455) for ESP32
+
+## Examples
+
+Get started with example test [example](https://github.com/espressif/esp-protocols/tree/master/components/esp_websocket_client/examples):
+
+## Documentation
+
+* View the full [html documentation](https://docs.espressif.com/projects/esp-protocols/esp_websocket_client/docs/latest/index.html)

esp32/managed_components/espressif__esp_websocket_client/examples/linux/CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+set(common_component_dir ../../../../common_components)
+set(EXTRA_COMPONENT_DIRS
+   ../..
+  "${common_component_dir}/linux_compat/esp_timer"
+  "${common_component_dir}/linux_compat/freertos"
+   $ENV{IDF_PATH}/examples/protocols/linux_stubs/esp_stubs
+   $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
+
+set(COMPONENTS main)
+project(websocket)

esp32/managed_components/espressif__esp_websocket_client/examples/linux/README.md

@@ -0,0 +1,48 @@
+# ESP Websocket Client - Host Example
+
+This example demonstrates the ESP websocket client using the `linux` target. It allows for compilation and execution of the example directly within a Linux environment.
+
+## Compilation and Execution
+
+To compile and execute this example on Linux need to set target `linux`
+
+* Debian/Ubuntu: `sudo apt-get install -y libbsd-dev`
+* Fedora/RHEL: `sudo dnf install libbsd-devel`
+* Arch: `sudo pacman -S libbsd`
+* Alpine: `sudo apk add libbsd-dev`
+
+```
+idf.py --preview set-target linux
+idf.py build
+./build/websocket.elf
+```
+
+## Example Output
+
+```
+I (76826192) websocket: [APP] Startup..
+I (76826193) websocket: [APP] Free memory: 4294967295 bytes
+I (76826193) websocket: [APP] IDF version: v6.0-dev-2414-gab3feab1d13
+I (76826195) websocket: Connecting to wss://echo.websocket.org...
+W (76826195) websocket_client: `reconnect_timeout_ms` is not set, or it is less than or equal to zero, using default time out 10000 (milliseconds)
+W (76826195) websocket_client: `network_timeout_ms` is not set, or it is less than or equal to zero, using default time out 10000 (milliseconds)
+I (76826195) websocket: WEBSOCKET_EVENT_BEGIN
+I (76826196) websocket_client: Started
+I (76826294) esp-x509-crt-bundle: Certificate validated
+I (76827230) websocket: WEBSOCKET_EVENT_CONNECTED
+I (76827239) websocket: WEBSOCKET_EVENT_DATA
+I (76827239) websocket: Received opcode=1
+W (76827239) websocket: Received=Request served by 4d896d95b55478
+W (76827239) websocket: Total payload length=32, data_len=32, current payload offset=0
+
+I (76828198) websocket: Sending hello 0000
+I (76828827) websocket: WEBSOCKET_EVENT_DATA
+I (76828827) websocket: Received opcode=1
+W (76828827) websocket: Received=hello 0000
+W (76828827) websocket: Total payload length=10, data_len=10, current payload offset=0
+
+I (76829207) websocket: Sending fragmented text message
+```
+
+## Coverage Reporting
+For generating a coverage report, it's necessary to enable `CONFIG_GCOV_ENABLED=y` option. Set the following configuration in your project's SDK configuration file (`sdkconfig.ci.coverage`, `sdkconfig.ci.linux` or via `menuconfig`):

esp32/managed_components/espressif__esp_websocket_client/examples/linux/main/CMakeLists.txt

@@ -0,0 +1,12 @@
+idf_component_register(SRCS "websocket_linux.c"
+                    REQUIRES esp_websocket_client protocol_examples_common esp_netif)
+
+if(CONFIG_GCOV_ENABLED)
+    target_compile_options(${COMPONENT_LIB} PUBLIC --coverage -fprofile-arcs -ftest-coverage)
+    target_link_options(${COMPONENT_LIB} PUBLIC  --coverage -fprofile-arcs -ftest-coverage)
+
+    idf_component_get_property(esp_websocket_client esp_websocket_client COMPONENT_LIB)
+
+    target_compile_options(${esp_websocket_client} PUBLIC --coverage -fprofile-arcs -ftest-coverage)
+    target_link_options(${esp_websocket_client} PUBLIC  --coverage -fprofile-arcs -ftest-coverage)
+endif()

esp32/managed_components/espressif__esp_websocket_client/examples/linux/main/Kconfig.projbuild

@@ -0,0 +1,34 @@
+menu "Host-test config"
+
+    config GCOV_ENABLED
+        bool "Coverage analyzer"
+        default n
+        help
+            Enables coverage analyzing for host tests.
+
+    config WEBSOCKET_URI
+          string "Websocket endpoint URI"
+          default "wss://echo.websocket.org"
+          help
+              URL of websocket endpoint this example connects to and sends echo
+
+    config WS_OVER_TLS_SERVER_AUTH
+        bool "Enable WebSocket over TLS with Server Certificate Verification Only"
+        default y
+        help
+            Enables WebSocket connections over TLS (WSS) with server certificate verification.
+            The client verifies the server certificate; the server does not require a client certificate.
+
+    config WS_OVER_TLS_MUTUAL_AUTH
+        bool "Enable WebSocket over TLS with Server Client Mutual Authentification"
+        default n
+        help
+            Enables WebSocket connections over TLS (WSS) with server and client mutual certificate verification.
+
+    config WS_OVER_TLS_SKIP_COMMON_NAME_CHECK
+        bool "Skip common name(CN) check during TLS authentification"
+        default n
+        help
+            Skip Common Name (CN) check during TLS (WSS) authentication. Use only for testing.
+
+endmenu

esp32/managed_components/espressif__esp_websocket_client/examples/linux/main/websocket_linux.c

@@ -0,0 +1,173 @@
+/*
+ * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <esp_log.h>
+#include "protocol_examples_common.h"
+
+#include "esp_websocket_client.h"
+#include "esp_system.h"
+#include "esp_event.h"
+#include "esp_netif.h"
+#include "esp_crt_bundle.h"
+
+static const char *TAG = "websocket";
+
+static void log_error_if_nonzero(const char *message, int error_code)
+{
+    if (error_code != 0) {
+        ESP_LOGE(TAG, "Last error %s: 0x%x", message, error_code);
+    }
+}
+
+static void websocket_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data)
+{
+    esp_websocket_event_data_t *data = (esp_websocket_event_data_t *)event_data;
+    switch (event_id) {
+    case WEBSOCKET_EVENT_BEGIN:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_BEGIN");
+        break;
+#if WS_TRANSPORT_HEADER_CALLBACK_SUPPORT
+    case WEBSOCKET_EVENT_HEADER_RECEIVED:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_HEADER_RECEIVED: %.*s", data->data_len, data->data_ptr);
+        break;
+#endif
+    case WEBSOCKET_EVENT_CONNECTED:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_CONNECTED");
+        break;
+    case WEBSOCKET_EVENT_DISCONNECTED:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_DISCONNECTED");
+        log_error_if_nonzero("HTTP status code",  data->error_handle.esp_ws_handshake_status_code);
+        if (data->error_handle.error_type == WEBSOCKET_ERROR_TYPE_TCP_TRANSPORT) {
+            log_error_if_nonzero("reported from esp-tls", data->error_handle.esp_tls_last_esp_err);
+            log_error_if_nonzero("reported from tls stack", data->error_handle.esp_tls_stack_err);
+            log_error_if_nonzero("captured as transport's socket errno",  data->error_handle.esp_transport_sock_errno);
+        }
+        break;
+    case WEBSOCKET_EVENT_DATA:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_DATA");
+        ESP_LOGI(TAG, "Received opcode=%d", data->op_code);
+        if (data->op_code == 0x08 && data->data_len == 2) {
+            ESP_LOGW(TAG, "Received closed message with code=%d", 256 * data->data_ptr[0] + data->data_ptr[1]);
+        } else {
+            ESP_LOGW(TAG, "Received=%.*s", data->data_len, (char *)data->data_ptr);
+        }
+
+        // If received data contains json structure it succeed to parse
+        ESP_LOGW(TAG, "Total payload length=%d, data_len=%d, current payload offset=%d\r\n", data->payload_len, data->data_len, data->payload_offset);
+
+        break;
+    case WEBSOCKET_EVENT_ERROR:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_ERROR");
+        log_error_if_nonzero("HTTP status code",  data->error_handle.esp_ws_handshake_status_code);
+        if (data->error_handle.error_type == WEBSOCKET_ERROR_TYPE_TCP_TRANSPORT) {
+            log_error_if_nonzero("reported from esp-tls", data->error_handle.esp_tls_last_esp_err);
+            log_error_if_nonzero("reported from tls stack", data->error_handle.esp_tls_stack_err);
+            log_error_if_nonzero("captured as transport's socket errno",  data->error_handle.esp_transport_sock_errno);
+        }
+        break;
+    case WEBSOCKET_EVENT_FINISH:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_FINISH");
+        break;
+    }
+}
+
+
+static void websocket_app_start(void)
+{
+    esp_websocket_client_config_t websocket_cfg = {};
+
+    websocket_cfg.uri = CONFIG_WEBSOCKET_URI;
+
+#if CONFIG_WS_OVER_TLS_MUTUAL_AUTH
+    /* Configuring client certificates for mutual authentification */
+    extern const char cacert_start[] asm("_binary_ca_cert_pem_start");
+    extern const char cert_start[] asm("_binary_client_cert_pem_start");
+    extern const char cert_end[]   asm("_binary_client_cert_pem_end");
+    extern const char key_start[] asm("_binary_client_key_pem_start");
+    extern const char key_end[]   asm("_binary_client_key_pem_end");
+
+    websocket_cfg.cert_pem = cacert_start;
+    websocket_cfg.client_cert = cert_start;
+    websocket_cfg.client_cert_len = cert_end - cert_start;
+    websocket_cfg.client_key = key_start;
+    websocket_cfg.client_key_len = key_end - key_start;
+#elif CONFIG_WS_OVER_TLS_SERVER_AUTH
+    // Using certificate bundle as default server certificate source
+    websocket_cfg.crt_bundle_attach = esp_crt_bundle_attach;
+    // If using a custom certificate it could be added to certificate bundle,
+    // added to the build similar to client certificates in this examples,
+    // or read from NVS.
+    /* extern const char cacert_start[] asm("ADDED_CERTIFICATE"); */
+    /* websocket_cfg.cert_pem = cacert_start; */
+#endif
+
+#if CONFIG_WS_OVER_TLS_SKIP_COMMON_NAME_CHECK
+    websocket_cfg.skip_cert_common_name_check = true;
+#endif
+
+    ESP_LOGI(TAG, "Connecting to %s...", websocket_cfg.uri);
+
+    esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
+    // This call demonstrates adding another header; it's called to increase code coverage
+    esp_websocket_client_append_header(client, "HeaderNewKey", "value");
+
+    esp_websocket_register_events(client, WEBSOCKET_EVENT_ANY, websocket_event_handler, (void *)client);
+
+    esp_websocket_client_start(client);
+    char data[32];
+    int i = 0;
+    while (i < 1) {
+        if (esp_websocket_client_is_connected(client)) {
+            int len = sprintf(data, "hello %04d", i++);
+            ESP_LOGI(TAG, "Sending %s", data);
+            esp_websocket_client_send_text(client, data, len, portMAX_DELAY);
+        }
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+    }
+
+    // Sending text data
+    ESP_LOGI(TAG, "Sending fragmented text message");
+    memset(data, 'a', sizeof(data));
+    esp_websocket_client_send_text_partial(client, data, sizeof(data), portMAX_DELAY);
+    memset(data, 'b', sizeof(data));
+    esp_websocket_client_send_cont_msg(client, data, sizeof(data), portMAX_DELAY);
+    esp_websocket_client_send_fin(client, portMAX_DELAY);
+
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    // Sending binary data
+    ESP_LOGI(TAG, "Sending fragmented binary message");
+    char binary_data[128];
+    memset(binary_data, 0, sizeof(binary_data));
+    esp_websocket_client_send_bin_partial(client, binary_data, sizeof(binary_data), portMAX_DELAY);
+    memset(binary_data, 1, sizeof(binary_data));
+    esp_websocket_client_send_cont_msg(client, binary_data, sizeof(binary_data), portMAX_DELAY);
+    esp_websocket_client_send_fin(client, portMAX_DELAY);
+
+    esp_websocket_client_destroy(client);
+}
+
+int main(void)
+{
+
+    ESP_LOGI(TAG, "[APP] Startup..");
+    ESP_LOGI(TAG, "[APP] Free memory: %" PRIu32 " bytes", esp_get_free_heap_size());
+    ESP_LOGI(TAG, "[APP] IDF version: %s", esp_get_idf_version());
+    esp_log_level_set("*", ESP_LOG_INFO);
+    esp_log_level_set("websocket_client", ESP_LOG_DEBUG);
+    esp_log_level_set("transport_ws", ESP_LOG_DEBUG);
+    esp_log_level_set("trans_tcp", ESP_LOG_DEBUG);
+
+    ESP_ERROR_CHECK(esp_netif_init());
+    ESP_ERROR_CHECK(esp_event_loop_create_default());
+
+    /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
+     * Read "Establishing Wi-Fi or Ethernet Connection" section in
+     * examples/protocols/README.md for more information about this function.
+     */
+    ESP_ERROR_CHECK(example_connect());
+
+    websocket_app_start();
+    return 0;
+}

esp32/managed_components/espressif__esp_websocket_client/examples/target/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's CMakeLists
+# in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(websocket_example)

esp32/managed_components/espressif__esp_websocket_client/examples/target/README.md

@@ -0,0 +1,381 @@
+# Websocket Sample application
+
+This example shows how to set up and communicate over a websocket.
+
+## Table of Contents
+
+- [Hardware Required](#hardware-required)
+- [Configure the project](#configure-the-project)
+- [Pre-configured SDK Configurations](#pre-configured-sdk-configurations)
+- [Server Certificate Verification](#server-certificate-verification)
+- [Generating Self-signed Certificates](#generating-a-self-signed-certificates-with-openssl)
+- [Build and Flash](#build-and-flash)
+- [Testing with pytest](#testing-with-pytest)
+- [Example Output](#example-output)
+- [WebSocket Test Server](#websocket-test-server)
+- [Python Flask Echo Server](#alternative-python-flask-echo-server)
+
+## Quick Start
+
+1. **Install dependencies:**
+   ```bash
+   pip install -r esp-protocols/ci/requirements.txt
+   ```
+
+2. **Configure and build:**
+   ```bash
+   idf.py menuconfig  # Configure WiFi/Ethernet and WebSocket URI
+   idf.py build
+   ```
+
+3. **Flash and monitor:**
+   ```bash
+   idf.py -p PORT flash monitor
+   ```
+
+4. **Run tests:**
+   ```bash
+   pytest .
+   ```
+
+## How to Use Example
+
+### Hardware Required
+
+This example can be executed on any ESP32 board, the only required interface is WiFi and connection to internet or a local server.
+
+### Configure the project
+
+* Open the project configuration menu (`idf.py menuconfig`)
+* Configure Wi-Fi or Ethernet under "Example Connection Configuration" menu.
+* Configure the websocket endpoint URI under "Example Configuration", if "WEBSOCKET_URI_FROM_STDIN" is selected then the example application will connect to the URI it reads from stdin (used for testing)
+* To test a WebSocket client example over TLS, please enable one of the following configurations: `CONFIG_WS_OVER_TLS_MUTUAL_AUTH` or `CONFIG_WS_OVER_TLS_SERVER_AUTH`. See the sections below for more details.
+
+### Pre-configured SDK Configurations
+
+This example includes several pre-configured `sdkconfig.ci.*` files for different testing scenarios:
+
+* **sdkconfig.ci** - Default configuration with WebSocket over Ethernet (IP101 PHY, ESP32, IPv6) and hardcoded URI.
+* **sdkconfig.ci.plain_tcp** - WebSocket over plain TCP (no TLS, URI from stdin) using Ethernet (IP101 PHY, ESP32, IPv6).
+* **sdkconfig.ci.mutual_auth** - WebSocket with mutual TLS authentication (client/server certificate verification, skips CN check) and URI from stdin.
+* **sdkconfig.ci.dynamic_buffer** - WebSocket with dynamic buffer allocation, Ethernet (IP101 PHY, ESP32, IPv6), and hardcoded URI.
+
+Example:
+```
+idf.py -DSDKCONFIG_DEFAULTS="sdkconfig.ci.plain_tcp" build
+```
+
+### Server Certificate Verification
+
+* Mutual Authentication: When `CONFIG_WS_OVER_TLS_MUTUAL_AUTH=y` is enabled, it's essential to provide valid certificates for both the server and client.
+  This ensures a secure two-way verification process.
+* Server-Only Authentication: To perform verification of the server's certificate only (without requiring a client certificate), set `CONFIG_WS_OVER_TLS_SERVER_AUTH=y`.
+  This method skips client certificate verification.
+* Example below demonstrates how to generate a new self signed certificates for the server and client using the OpenSSL command line tool
+
+Please note: This example represents an extremely simplified approach to generating self-signed certificates/keys with a single common CA, devoid of CN checks, lacking password protection, and featuring hardcoded key sizes and types. It is intended solely for testing purposes.
+In the outlined steps, we are omitting the configuration of the CN (Common Name) field due to the context of a testing environment. However, it's important to recognize that the CN field is a critical element of SSL/TLS certificates, significantly influencing the security and efficacy of HTTPS communications. This field facilitates the verification of a website's identity, enhancing trust and security in web interactions. In practical deployments beyond testing scenarios, ensuring the CN field is accurately set is paramount for maintaining the integrity and reliability of secure communications
+
+### Generating a self signed Certificates with OpenSSL manually
+* The example below outlines the process for creating new certificates for both the server and client using OpenSSL, a widely-used command line tool for implementing TLS protocol:
+
+```
+Generate the CA's Private Key;
+openssl genrsa -out ca_key.pem 2048
+
+Create the CA's Certificate
+openssl req -new -x509 -days 3650 -key ca_key.pem -out ca_cert.pem
+
+Generate the Server's Private Key
+openssl genrsa -out server_key.pem 2048
+
+Generate a Certificate Signing Request (CSR) for the Server
+openssl req -new -key server_key.pem -out server_csr.pem
+
+Sign the Server's CSR with the CA's Certificate
+openssl x509 -req -days 3650 -in server_csr.pem -CA ca_cert.pem -CAkey ca_key.pem -CAcreateserial -out server_cert.pem
+
+Generate the Client's Private Key
+openssl genrsa -out client_key.pem 2048
+
+Generate a Certificate Signing Request (CSR) for the Client
+openssl req -new -key client_key.pem -out client_csr.pem
+
+Sign the Client's CSR with the CA's Certificate
+openssl x509 -req -days 3650 -in client_csr.pem -CA ca_cert.pem -CAkey ca_key.pem -CAcreateserial -out client_cert.pem
+
+```
+
+Expiry time and metadata fields can be adjusted in the invocation.
+
+Please see the openssl man pages (man openssl) for more details.
+
+It is **strongly recommended** to not reuse the example certificate in your application;
+it is included only for demonstration.
+
+### Certificate Generation Options
+
+#### Option 1: Manual OpenSSL Commands
+Follow the step-by-step process in the section above to understand certificate generation.
+
+#### Option 2: Automated Script
+**Note:** Test certificates are already available in the example. If you want to regenerate them or create new ones, use the provided `generate_certs.sh` script:
+
+```bash
+# Auto-detect local IP address (recommended for network testing)
+./generate_certs.sh
+
+# Specify custom hostname or IP address
+./generate_certs.sh 192.168.1.100
+
+# Use localhost (for local-only testing)
+./generate_certs.sh localhost
+```
+
+This script automatically generates all required certificates in the correct directories and cleans up temporary files.
+
+**Important:** The server certificate's Common Name (CN) must match the hostname or IP address that ESP32 clients use to connect. If not specified, the script attempts to auto-detect your local IP address. Certificate verification will fail if there's a mismatch between the CN and the actual connection address.
+
+**CN Mismatch Handling:**
+If you encounter certificate verification failures due to CN mismatch, you have two options:
+
+1. **Recommended (Secure):** Regenerate certificates with the correct CN:
+   ```bash
+   ./generate_certs.sh <actual_hostname_or_ip>
+   ```
+
+2. **Testing Only (Less Secure):** Skip CN verification by enabling `CONFIG_WS_OVER_TLS_SKIP_COMMON_NAME_CHECK=y` in `idf.py menuconfig`.
+
+   ⚠️ **WARNING:** This option disables an important security check and should **NEVER** be used in production environments. It makes your application vulnerable to man-in-the-middle attacks.
+
+#### Option 3: Online Certificate Generators
+- **mkcert**: `install mkcert` then `mkcert -install` and `mkcert localhost`
+- **Let's Encrypt**: For production certificates (free, automated renewal)
+- **Online generators**: Search for "self-signed certificate generator" online
+
+### Build and Flash
+
+Build the project and flash it to the board, then run monitor tool to view serial output:
+
+```
+idf.py -p PORT flash monitor
+```
+
+(To exit the serial monitor, type ``Ctrl-]``.)
+
+See the [ESP-IDF Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html) for full steps to configure and use ESP-IDF to build projects.
+
+## Testing with pytest
+
+### Install Dependencies
+
+Before running the pytest tests, you need to install the required Python packages:
+
+```
+pip install -r esp-protocols/ci/requirements.txt
+```
+
+### Run pytest
+
+After installing the dependencies, you can run the pytest tests:
+
+Run all tests in current directory:
+```
+pytest .
+```
+
+Run specific test file:
+```
+pytest pytest_websocket.py
+```
+
+To specify the target device or serial port, use:
+```
+pytest --target esp32 --port /dev/ttyUSB0
+```
+
+## Example Output
+
+```
+I (482) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
+I (2492) example_connect: Ethernet Link Up
+I (4472) tcpip_adapter: eth ip: 192.168.2.137, mask: 255.255.255.0, gw: 192.168.2.2
+I (4472) example_connect: Connected to Ethernet
+I (4472) example_connect: IPv4 address: 192.168.2.137
+I (4472) example_connect: IPv6 address: fe80:0000:0000:0000:bedd:c2ff:fed4:a92b
+I (4482) WEBSOCKET: Connecting to wss://echo.websocket.org...
+I (5012) WEBSOCKET: WEBSOCKET_EVENT_CONNECTED
+I (5492) WEBSOCKET: Sending hello 0000
+I (6052) WEBSOCKET: WEBSOCKET_EVENT_DATA
+W (6052) WEBSOCKET: Received=hello 0000
+
+I (6492) WEBSOCKET: Sending hello 0001
+I (7052) WEBSOCKET: WEBSOCKET_EVENT_DATA
+W (7052) WEBSOCKET: Received=hello 0001
+
+I (7492) WEBSOCKET: Sending hello 0002
+I (8082) WEBSOCKET: WEBSOCKET_EVENT_DATA
+W (8082) WEBSOCKET: Received=hello 0002
+
+I (8492) WEBSOCKET: Sending hello 0003
+I (9152) WEBSOCKET: WEBSOCKET_EVENT_DATA
+W (9162) WEBSOCKET: Received=hello 0003
+
+```
+
+
+## WebSocket Test Server
+
+### Standalone Test Server
+
+This example includes a standalone WebSocket test server (`websocket_server.py`) that can be used for testing your ESP32 WebSocket client:
+
+#### Quick Start
+
+**Plain WebSocket (No TLS):**
+```bash
+# Plain WebSocket server (no encryption)
+python websocket_server.py
+
+# Custom port
+python websocket_server.py --port 9000
+```
+
+**Server-Only Authentication:**
+```bash
+# TLS WebSocket server (ESP32 verifies server)
+python websocket_server.py --tls
+
+# Custom port with TLS
+python websocket_server.py --port 9000 --tls
+```
+
+**Mutual Authentication:**
+```bash
+# TLS with client certificate verification (both verify each other)
+python websocket_server.py --tls --client-verify
+
+# Custom port with mutual authentication
+python websocket_server.py --port 9000 --tls --client-verify
+```
+
+#### Server Features
+- **Echo functionality** - Automatically echoes back received messages
+- **TLS support** - Secure WebSocket (WSS) connections
+- **Client certificate verification** - Mutual authentication support
+- **Binary and text messages** - Handles both data types
+- **Auto IP detection** - Shows connection URL with your local IP
+
+#### Verification Modes
+
+**Plain WebSocket (No TLS):**
+- No certificate verification on either side
+- Use for local testing or trusted networks
+- Configuration: `CONFIG_WS_OVER_TLS_MUTUAL_AUTH=n` and `CONFIG_WS_OVER_TLS_SERVER_AUTH=n`
+
+**Server-Only Authentication (`--tls` without `--client-verify`):**
+- ESP32 verifies the server's certificate
+- Server does NOT verify the ESP32's certificate
+- Use when you trust the client but want to verify the server
+- Configuration: `CONFIG_WS_OVER_TLS_SERVER_AUTH=y`
+
+**Mutual Authentication (`--tls --client-verify`):**
+- ESP32 verifies the server's certificate
+- Server verifies the ESP32's certificate
+- Use when both parties need to authenticate each other
+- Configuration: `CONFIG_WS_OVER_TLS_MUTUAL_AUTH=y`
+
+#### Usage Examples
+
+**Plain WebSocket (No TLS or Client Verification):**
+```bash
+# Basic server (port 8080)
+python websocket_server.py
+
+# Custom port
+python websocket_server.py --port 9000
+```
+
+**Server-Only Authentication (ESP32 verifies server, server doesn't verify ESP32):**
+```bash
+# TLS server without client verification
+python websocket_server.py --tls
+
+# Custom port with TLS
+python websocket_server.py --port 9000 --tls
+```
+
+**Mutual Authentication (Both ESP32 and server verify each other's certificates):**
+```bash
+# TLS server with client certificate verification
+python websocket_server.py --tls --client-verify
+
+# Custom port with mutual authentication
+python websocket_server.py --port 9000 --tls --client-verify
+```
+
+The server will display the connection URL (e.g., `wss://192.168.1.100:8080`) that you can use in your ESP32 configuration.
+
+### Alternative: Python Flask Echo Server
+
+By default, the `wss://echo.websocket.org` endpoint is used. You can also setup a Python Flask websocket echo server locally and try the `ws://<your-ip>:5000` endpoint. To do this, install Flask-sock Python package
+
+```
+pip install flask-sock
+```
+
+and start a Flask websocket echo server locally by executing the following Python code:
+
+```python
+from flask import Flask
+from flask_sock import Sock
+
+app = Flask(__name__)
+sock = Sock(app)
+
+
+@sock.route('/')
+def echo(ws):
+    while True:
+        data = ws.receive()
+        ws.send(data)
+
+
+if __name__ == '__main__':
+    # To run your Flask + WebSocket server in production you can use Gunicorn:
+    # gunicorn -b 0.0.0.0:5000 --workers 4 --threads 100 module:app
+    app.run(host="0.0.0.0", debug=True)
+```
+
+## Troubleshooting
+
+### Common Issues
+
+**Connection failed:**
+- Verify WiFi/Ethernet configuration in `idf.py menuconfig`
+- Check if the WebSocket server is running and accessible
+- Ensure the URI is correct (use `wss://` for TLS, `ws://` for plain TCP)
+
+**TLS certificate errors:**
+- **Certificate verification failed:** The most common cause is CN mismatch. Ensure the server certificate's Common Name matches the hostname/IP you're connecting to:
+  - Check your connection URI (e.g., if connecting to `wss://192.168.1.100:8080`, the certificate CN must be `192.168.1.100`)
+  - Regenerate certificates with the correct CN: `./generate_certs.sh <your_hostname_or_ip>`
+  - For testing only, you can bypass CN check with `CONFIG_WS_OVER_TLS_SKIP_COMMON_NAME_CHECK=y` (NOT recommended for production)
+- Verify certificate files are properly formatted and accessible
+- Ensure the CA certificate used to sign the server certificate is loaded on the ESP32
+
+**Build errors:**
+- Clean build: `idf.py fullclean`
+- Check ESP-IDF version compatibility
+- Verify all dependencies are installed
+
+**Test failures:**
+- Ensure the device is connected and accessible via the specified port
+- Check that the target device matches the configuration (`--target esp32`)
+- Verify pytest dependencies are installed correctly
+
+### Getting Help
+
+- Check the [ESP-IDF documentation](https://docs.espressif.com/projects/esp-idf/)
+- Review the [WebSocket client component documentation](../../README.md)
+- Report issues on the [ESP Protocols repository](https://github.com/espressif/esp-protocols)

esp32/managed_components/espressif__esp_websocket_client/examples/target/generate_certs.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+# Generate CA, Server, and Client certificates automatically
+#
+# Usage: ./generate_certs.sh [SERVER_CN]
+#   SERVER_CN: The Common Name (hostname or IP) for the server certificate.
+#              This should match the hostname/IP that ESP32 clients will use to connect.
+#              If not provided, the script will attempt to auto-detect the local IP address.
+#              Falls back to "localhost" if auto-detection fails.
+#
+# IMPORTANT: The server certificate's Common Name (CN) must match the hostname or IP address
+# that ESP32 clients use to connect. If there's a mismatch, certificate verification will fail
+# during the TLS handshake. For production use, always specify the correct hostname/IP.
+
+# Get server hostname/IP from command line argument or auto-detect
+if [ -n "$1" ]; then
+    SERVER_CN="$1"
+    echo "Using provided SERVER_CN: $SERVER_CN"
+else
+    # Attempt to auto-detect local IP address
+    # Try multiple methods for better compatibility across different systems
+    if command -v hostname >/dev/null 2>&1; then
+        # Try to get IP from hostname command (works on most Unix systems)
+        SERVER_CN=$(hostname -I 2>/dev/null | awk '{print $1}')
+    fi
+
+    # If the above failed, try ifconfig (macOS and some Linux systems)
+    if [ -z "$SERVER_CN" ] && command -v ifconfig >/dev/null 2>&1; then
+        SERVER_CN=$(ifconfig | grep "inet " | grep -v 127.0.0.1 | awk '{print $2}' | head -n1)
+    fi
+
+    # If still empty, try ip command (modern Linux systems)
+    if [ -z "$SERVER_CN" ] && command -v ip >/dev/null 2>&1; then
+        SERVER_CN=$(ip -4 addr show | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | grep -v 127.0.0.1 | head -n1)
+    fi
+
+    # Fall back to localhost if auto-detection failed
+    if [ -z "$SERVER_CN" ]; then
+        SERVER_CN="localhost"
+        echo "Warning: Could not auto-detect IP address. Using 'localhost' as SERVER_CN."
+        echo "         If your server runs on a different machine or IP, re-run with: ./generate_certs.sh <hostname_or_ip>"
+    else
+        echo "Auto-detected SERVER_CN: $SERVER_CN"
+    fi
+fi
+
+echo "Note: ESP32 clients must connect using: $SERVER_CN"
+echo ""
+
+# Create directories if they don't exist
+mkdir -p main/certs/server
+
+echo "Generating CA certificate..."
+openssl genrsa -out main/certs/ca_key.pem 2048
+openssl req -new -x509 -days 3650 -key main/certs/ca_key.pem -out main/certs/ca_cert.pem -subj "/C=US/ST=State/L=City/O=Organization/CN=TestCA"
+
+echo "Generating Server certificate with CN=$SERVER_CN..."
+openssl genrsa -out main/certs/server/server_key.pem 2048
+openssl req -new -key main/certs/server/server_key.pem -out server_csr.pem -subj "/C=US/ST=State/L=City/O=Organization/CN=$SERVER_CN"
+openssl x509 -req -days 3650 -in server_csr.pem -CA main/certs/ca_cert.pem -CAkey main/certs/ca_key.pem -CAcreateserial -out main/certs/server/server_cert.pem
+
+echo "Generating Client certificate..."
+openssl genrsa -out main/certs/client_key.pem 2048
+openssl req -new -key main/certs/client_key.pem -out client_csr.pem -subj "/C=US/ST=State/L=City/O=Organization/CN=TestClient"
+openssl x509 -req -days 3650 -in client_csr.pem -CA main/certs/ca_cert.pem -CAkey main/certs/ca_key.pem -CAcreateserial -out main/certs/client_cert.pem
+
+# Clean up CSR files
+rm server_csr.pem client_csr.pem
+
+echo "Certificates generated successfully!"
+echo ""
+echo "Generated files:"
+echo "  - main/certs/ca_cert.pem (CA certificate)"
+echo "  - main/certs/ca_key.pem (CA private key)"
+echo "  - main/certs/client_cert.pem (Client certificate)"
+echo "  - main/certs/client_key.pem (Client private key)"
+echo "  - main/certs/server/server_cert.pem (Server certificate with CN=$SERVER_CN)"
+echo "  - main/certs/server/server_key.pem (Server private key)"
+echo ""
+echo "IMPORTANT: Configure ESP32 clients to connect to: $SERVER_CN"
+echo "           The server certificate is valid for this hostname/IP only."
+echo ""
+echo "Note: If the CN doesn't match your connection hostname/IP, you have two options:"
+echo "      1. Regenerate certificates with correct CN: ./generate_certs.sh <correct_hostname_or_ip>"
+echo "      2. Skip CN verification (TESTING ONLY): Enable CONFIG_WS_OVER_TLS_SKIP_COMMON_NAME_CHECK=y"
+echo "         WARNING: Option 2 reduces security and should NOT be used in production!"

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/CMakeLists.txt

@@ -0,0 +1,16 @@
+set(SRC_FILES "websocket_example.c") # Define source files
+set(INCLUDE_DIRS ".") # Define include directories
+set(EMBED_FILES "") # Initialize an empty list for files to embed
+
+# Conditionally append files to the list based on configuration
+#if(CONFIG_WS_OVER_TLS_MUTAL_AUTH)
+    list(APPEND EMBED_FILES
+        "certs/client_cert.pem"
+        "certs/ca_cert.pem"
+        "certs/client_key.pem")
+#endif()
+
+# Register the component with source files, include dirs, and any conditionally added embedded files
+idf_component_register(SRCS "${SRC_FILES}"
+                       INCLUDE_DIRS "${INCLUDE_DIRS}"
+                       EMBED_TXTFILES "${EMBED_FILES}")

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/Kconfig.projbuild

@@ -0,0 +1,50 @@
+menu "Example Configuration"
+
+    choice WEBSOCKET_URI_SOURCE
+        prompt "Websocket URI source"
+        default WEBSOCKET_URI_FROM_STRING
+        help
+            Selects the source of the URI used in the example.
+
+        config WEBSOCKET_URI_FROM_STRING
+            bool "From string"
+
+        config WEBSOCKET_URI_FROM_STDIN
+            bool "From stdin"
+    endchoice
+
+    config WEBSOCKET_URI
+        string "Websocket endpoint URI"
+        depends on WEBSOCKET_URI_FROM_STRING
+        default "wss://echo.websocket.org"
+        help
+            URL of websocket endpoint this example connects to and sends echo
+
+    config WS_OVER_TLS_SERVER_AUTH
+        bool "Enable WebSocket over TLS with Server Certificate Verification Only"
+        default y
+        help
+            Enables WebSocket connections over TLS (WSS) with server certificate verification.
+            This setting mandates the client to verify the servers certificate, while the server
+            does not require client certificate verification.
+
+    config WS_OVER_TLS_MUTUAL_AUTH
+        bool "Enable WebSocket over TLS with Server Client Mutual Authentification"
+        default n
+        help
+            Enables WebSocket connections over TLS (WSS) with server and client mutual certificate verification.
+
+    config WS_OVER_TLS_SKIP_COMMON_NAME_CHECK
+        bool "Skip common name(CN) check during TLS authentification"
+        default n
+        help
+            Skipping Common Name(CN) check during TLS(WSS) authentificatio
+
+    if CONFIG_IDF_TARGET = "linux"
+      config GCOV_ENABLED
+          bool "Coverage analyzer"
+          default n
+          help
+              Enables coverage analyzing for host tests.
+      endif
+endmenu

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/certs/ca_cert.pem

@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDazCCAlOgAwIBAgIUL04QhbSEt5oNbV4f7CeLLqTCw2gwDQYJKoZIhvcNAQEL
+BQAwRTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
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+RgfaNwH8Ug1r1xswjSZG
+-----END CERTIFICATE-----

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/certs/client_cert.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDWjCCAkKgAwIBAgIUUPCOgMA2v09E29fCkogx3RUBRtEwDQYJKoZIhvcNAQEL
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+-----END CERTIFICATE-----

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/certs/client_key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCrNeomxI2aoP+4
+iUy5SiA+41oHUDZDFeJOBjv5JCsKmlvFqxE9zynmPOVpuABErOJwzerPTa4NYKvu
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+6mY9FnUUufbJcpHxN58RTw==
+-----END PRIVATE KEY-----

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/certs/server/server_cert.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDWjCCAkKgAwIBAgIUUPCOgMA2v09E29fCkogx3RUBRtAwDQYJKoZIhvcNAQEL
+BQAwRTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
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+-----END CERTIFICATE-----

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/certs/server/server_key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC8WWbDxnLzTSfu
+QaO+kQnnzbwjhUHWn58s+BIEaO8MGG6bX+8r/SH9XjMfFS36qAN3qxgRun3YoRTa
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+BFJEfZl7ze/qptE9AR7DkLFYyMtrS7OlebYbLDOM9wKBgQD+rTdwULZibpKwlI3a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+-----END PRIVATE KEY-----

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/idf_component.yml

@@ -0,0 +1,8 @@
+dependencies:
+  espressif/cjson:
+    version: ^1.7.15
+  espressif/esp_websocket_client:
+    version: ^1.0.0
+  idf: '>=5.0'
+  protocol_examples_common:
+    path: ${IDF_PATH}/examples/common_components/protocol_examples_common

esp32/managed_components/espressif__esp_websocket_client/examples/target/main/websocket_example.c

@@ -0,0 +1,264 @@
+/*
+ * SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Unlicense OR CC0-1.0
+ */
+/* ESP HTTP Client Example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+
+#include <stdio.h>
+#include "esp_wifi.h"
+#include "esp_system.h"
+#include "nvs_flash.h"
+#include "esp_event.h"
+#include "protocol_examples_common.h"
+#include "esp_crt_bundle.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+#include "freertos/event_groups.h"
+
+#include "esp_log.h"
+#include "esp_websocket_client.h"
+#include "esp_event.h"
+#include <cJSON.h>
+
+#define NO_DATA_TIMEOUT_SEC 5
+
+static const char *TAG = "websocket";
+
+static TimerHandle_t shutdown_signal_timer;
+static SemaphoreHandle_t shutdown_sema;
+
+static void log_error_if_nonzero(const char *message, int error_code)
+{
+    if (error_code != 0) {
+        ESP_LOGE(TAG, "Last error %s: 0x%x", message, error_code);
+    }
+}
+
+static void shutdown_signaler(TimerHandle_t xTimer)
+{
+    ESP_LOGI(TAG, "No data received for %d seconds, signaling shutdown", NO_DATA_TIMEOUT_SEC);
+    xSemaphoreGive(shutdown_sema);
+}
+
+#if CONFIG_WEBSOCKET_URI_FROM_STDIN
+static void get_string(char *line, size_t size)
+{
+    int count = 0;
+    while (count < size) {
+        int c = fgetc(stdin);
+        if (c == '\n') {
+            line[count] = '\0';
+            break;
+        } else if (c > 0 && c < 127) {
+            line[count] = c;
+            ++count;
+        }
+        vTaskDelay(10 / portTICK_PERIOD_MS);
+    }
+}
+
+#endif /* CONFIG_WEBSOCKET_URI_FROM_STDIN */
+
+static void websocket_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data)
+{
+    esp_websocket_event_data_t *data = (esp_websocket_event_data_t *)event_data;
+    switch (event_id) {
+    case WEBSOCKET_EVENT_BEGIN:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_BEGIN");
+        break;
+#if WS_TRANSPORT_HEADER_CALLBACK_SUPPORT
+    case WEBSOCKET_EVENT_HEADER_RECEIVED:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_HEADER_RECEIVED: %.*s", data->data_len, data->data_ptr);
+        break;
+#endif
+    case WEBSOCKET_EVENT_CONNECTED:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_CONNECTED");
+        break;
+    case WEBSOCKET_EVENT_DISCONNECTED:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_DISCONNECTED");
+        log_error_if_nonzero("HTTP status code",  data->error_handle.esp_ws_handshake_status_code);
+        if (data->error_handle.error_type == WEBSOCKET_ERROR_TYPE_TCP_TRANSPORT) {
+            log_error_if_nonzero("reported from esp-tls", data->error_handle.esp_tls_last_esp_err);
+            log_error_if_nonzero("reported from tls stack", data->error_handle.esp_tls_stack_err);
+            log_error_if_nonzero("captured as transport's socket errno",  data->error_handle.esp_transport_sock_errno);
+        }
+        break;
+    case WEBSOCKET_EVENT_DATA:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_DATA");
+        ESP_LOGI(TAG, "Received opcode=%d", data->op_code);
+        if (data->op_code == 0x2) { // Opcode 0x2 indicates binary data
+            ESP_LOG_BUFFER_HEX("Received binary data", data->data_ptr, data->data_len);
+        } else if (data->op_code == 0x08 && data->data_len == 2) {
+            ESP_LOGW(TAG, "Received closed message with code=%d", 256 * data->data_ptr[0] + data->data_ptr[1]);
+        } else {
+            ESP_LOGW(TAG, "Received=%.*s\n\n", data->data_len, (char *)data->data_ptr);
+        }
+
+        // If received data contains json structure it succeed to parse
+        cJSON *root = cJSON_Parse(data->data_ptr);
+        if (root) {
+            for (int i = 0 ; i < cJSON_GetArraySize(root) ; i++) {
+                cJSON *elem = cJSON_GetArrayItem(root, i);
+                cJSON *id = cJSON_GetObjectItem(elem, "id");
+                cJSON *name = cJSON_GetObjectItem(elem, "name");
+                ESP_LOGW(TAG, "Json={'id': '%s', 'name': '%s'}", id->valuestring, name->valuestring);
+            }
+            cJSON_Delete(root);
+        }
+
+        ESP_LOGW(TAG, "Total payload length=%d, data_len=%d, current payload offset=%d\r\n", data->payload_len, data->data_len, data->payload_offset);
+
+        xTimerReset(shutdown_signal_timer, portMAX_DELAY);
+        break;
+    case WEBSOCKET_EVENT_ERROR:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_ERROR");
+        log_error_if_nonzero("HTTP status code",  data->error_handle.esp_ws_handshake_status_code);
+        if (data->error_handle.error_type == WEBSOCKET_ERROR_TYPE_TCP_TRANSPORT) {
+            log_error_if_nonzero("reported from esp-tls", data->error_handle.esp_tls_last_esp_err);
+            log_error_if_nonzero("reported from tls stack", data->error_handle.esp_tls_stack_err);
+            log_error_if_nonzero("captured as transport's socket errno",  data->error_handle.esp_transport_sock_errno);
+        }
+        break;
+    case WEBSOCKET_EVENT_FINISH:
+        ESP_LOGI(TAG, "WEBSOCKET_EVENT_FINISH");
+        break;
+    }
+}
+
+static void websocket_app_start(void)
+{
+    esp_websocket_client_config_t websocket_cfg = {};
+
+    shutdown_signal_timer = xTimerCreate("Websocket shutdown timer", NO_DATA_TIMEOUT_SEC * 1000 / portTICK_PERIOD_MS,
+                                         pdFALSE, NULL, shutdown_signaler);
+    shutdown_sema = xSemaphoreCreateBinary();
+
+#if CONFIG_WEBSOCKET_URI_FROM_STDIN
+    char line[128];
+
+    ESP_LOGI(TAG, "Please enter WebSocket endpoint URI");
+    ESP_LOGI(TAG, "Examples:");
+    ESP_LOGI(TAG, "  ws://192.168.1.100:8080     (plain WebSocket)");
+    ESP_LOGI(TAG, "  wss://192.168.1.100:8080    (secure WebSocket)");
+    ESP_LOGI(TAG, "  wss://echo.websocket.org    (public test server)");
+    get_string(line, sizeof(line));
+
+    websocket_cfg.uri = line;
+    ESP_LOGI(TAG, "Endpoint uri: %s\n", line);
+
+#else
+    websocket_cfg.uri = CONFIG_WEBSOCKET_URI;
+#endif /* CONFIG_WEBSOCKET_URI_FROM_STDIN */
+
+#if CONFIG_WS_OVER_TLS_MUTUAL_AUTH
+    /* Configuring client certificates for mutual authentification */
+    extern const char cacert_start[] asm("_binary_ca_cert_pem_start"); // CA certificate
+    extern const char cert_start[] asm("_binary_client_cert_pem_start"); // Client certificate
+    extern const char cert_end[]   asm("_binary_client_cert_pem_end");
+    extern const char key_start[] asm("_binary_client_key_pem_start"); // Client private key
+    extern const char key_end[]   asm("_binary_client_key_pem_end");
+
+    websocket_cfg.cert_pem = cacert_start;
+    websocket_cfg.client_cert = cert_start;
+    websocket_cfg.client_cert_len = cert_end - cert_start;
+    websocket_cfg.client_key = key_start;
+    websocket_cfg.client_key_len = key_end - key_start;
+#elif CONFIG_WS_OVER_TLS_SERVER_AUTH
+    // Using certificate bundle as default server certificate source
+    websocket_cfg.crt_bundle_attach = esp_crt_bundle_attach;
+    // If using a custom certificate it could be added to certificate bundle, added to the build similar to client certificates in this examples,
+    // or read from NVS.
+    /* extern const char cacert_start[] asm("ADDED_CERTIFICATE"); */
+    /* websocket_cfg.cert_pem = cacert_start; */
+#endif
+
+#if CONFIG_WS_OVER_TLS_SKIP_COMMON_NAME_CHECK
+    websocket_cfg.skip_cert_common_name_check = true;
+#endif
+
+    ESP_LOGI(TAG, "Connecting to %s...", websocket_cfg.uri);
+
+    esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
+    esp_websocket_register_events(client, WEBSOCKET_EVENT_ANY, websocket_event_handler, (void *)client);
+
+    esp_websocket_client_start(client);
+    xTimerStart(shutdown_signal_timer, portMAX_DELAY);
+    char data[32];
+    int i = 0;
+    while (i < 5) {
+        if (esp_websocket_client_is_connected(client)) {
+            int len = sprintf(data, "hello %04d", i++);
+            ESP_LOGI(TAG, "Sending %s", data);
+            esp_websocket_client_send_text(client, data, len, portMAX_DELAY);
+        }
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+    }
+
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    // Sending text data
+    ESP_LOGI(TAG, "Sending fragmented text message");
+    memset(data, 'a', sizeof(data));
+    esp_websocket_client_send_text_partial(client, data, sizeof(data), portMAX_DELAY);
+    memset(data, 'b', sizeof(data));
+    esp_websocket_client_send_cont_msg(client, data, sizeof(data), portMAX_DELAY);
+    esp_websocket_client_send_fin(client, portMAX_DELAY);
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+    // Sending binary data
+    ESP_LOGI(TAG, "Sending fragmented binary message");
+    char binary_data[5];
+    memset(binary_data, 0, sizeof(binary_data));
+    esp_websocket_client_send_bin_partial(client, binary_data, sizeof(binary_data), portMAX_DELAY);
+    memset(binary_data, 1, sizeof(binary_data));
+    esp_websocket_client_send_cont_msg(client, binary_data, sizeof(binary_data), portMAX_DELAY);
+    esp_websocket_client_send_fin(client, portMAX_DELAY);
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+    // Sending text data longer than ws buffer (default 1024)
+    ESP_LOGI(TAG, "Sending text longer than ws buffer (default 1024)");
+    const int size = 2000;
+    char *long_data = malloc(size);
+    memset(long_data, 'a', size);
+    esp_websocket_client_send_text(client, long_data, size, portMAX_DELAY);
+    free(long_data);
+
+    xSemaphoreTake(shutdown_sema, portMAX_DELAY);
+    esp_websocket_client_close(client, portMAX_DELAY);
+    ESP_LOGI(TAG, "Websocket Stopped");
+    esp_websocket_unregister_events(client, WEBSOCKET_EVENT_ANY, websocket_event_handler);
+    esp_websocket_client_destroy(client);
+}
+
+void app_main(void)
+{
+    ESP_LOGI(TAG, "[APP] Startup..");
+    ESP_LOGI(TAG, "[APP] Free memory: %" PRIu32 " bytes", esp_get_free_heap_size());
+    ESP_LOGI(TAG, "[APP] IDF version: %s", esp_get_idf_version());
+    esp_log_level_set("*", ESP_LOG_INFO);
+    esp_log_level_set("websocket_client", ESP_LOG_DEBUG);
+    esp_log_level_set("transport_ws", ESP_LOG_DEBUG);
+    esp_log_level_set("trans_tcp", ESP_LOG_DEBUG);
+
+    ESP_ERROR_CHECK(nvs_flash_init());
+    ESP_ERROR_CHECK(esp_netif_init());
+    ESP_ERROR_CHECK(esp_event_loop_create_default());
+
+    /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
+     * Read "Establishing Wi-Fi or Ethernet Connection" section in
+     * examples/protocols/README.md for more information about this function.
+     */
+    ESP_ERROR_CHECK(example_connect());
+
+    websocket_app_start();
+}

esp32/managed_components/espressif__esp_websocket_client/examples/target/pytest_websocket.py

@@ -0,0 +1,177 @@
+# SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Unlicense OR CC0-1.0
+import json
+import random
+import re
+import string
+import sys
+
+from websocket_server import WebsocketServer, get_my_ip
+
+
+def test_examples_protocol_websocket(dut):
+    """
+    steps:
+      1. obtain IP address
+      2. connect to uri specified in the config
+      3. send and receive data
+    """
+
+    # Test for echo functionality:
+    # Sends a series of simple "hello" messages to the WebSocket server and verifies that each one is echoed back correctly.
+    # This tests the basic responsiveness and correctness of the WebSocket connection.
+    def test_echo(dut):
+        dut.expect('WEBSOCKET_EVENT_CONNECTED')
+        for i in range(0, 5):
+            dut.expect(re.compile(b'Received=hello (\\d)'))
+        print('All echos received')
+        sys.stdout.flush()
+
+    # Test for clean closure of the WebSocket connection:
+    # Ensures that the WebSocket can correctly receive a close frame and terminate the connection without issues.
+    def test_close(dut):
+        code = dut.expect(
+            re.compile(
+                b'websocket: Received closed message with code=(\\d*)'))[0]
+        print('Received close frame with code {}'.format(code))
+
+    # Test for JSON message handling:
+    # Sends a JSON formatted string and verifies that the received message matches the expected JSON structure.
+    def test_json(dut, websocket):
+        json_string = """
+            [
+               {
+                  "id":"1",
+                  "name":"user1"
+               },
+               {
+                  "id":"2",
+                  "name":"user2"
+               }
+            ]
+        """
+        websocket.send_data(json_string)
+        data = json.loads(json_string)
+
+        match = dut.expect(
+            re.compile(b'Json=({[a-zA-Z0-9]*).*}')).group(0).decode()[5:]
+        if match == str(data[0]):
+            print('\n Sent message and received message are equal \n')
+            sys.stdout.flush()
+        else:
+            raise ValueError(
+                'DUT received string do not match sent string, \nexpected: {}\nwith length {}\
+                                 \nreceived: {}\nwith length {}'.format(
+                    data[0], len(data[0]), match, len(match)))
+
+    # Test for receiving long messages:
+    # This sends a message with a specified length (2000 characters) to ensure the WebSocket can handle large data payloads. Repeated 3 times for reliability.
+    def test_recv_long_msg(dut, websocket, msg_len, repeats):
+
+        send_msg = ''.join(
+            random.choice(string.ascii_uppercase + string.ascii_lowercase +
+                          string.digits) for _ in range(msg_len))
+
+        for _ in range(repeats):
+            websocket.send_data(send_msg)
+
+            recv_msg = ''
+            while len(recv_msg) < msg_len:
+                match = dut.expect(re.compile(
+                    b'Received=([a-zA-Z0-9]*).*\n')).group(1).decode()
+                recv_msg += match
+
+            if recv_msg == send_msg:
+                print('\n Sent message and received message are equal \n')
+                sys.stdout.flush()
+            else:
+                raise ValueError(
+                    'DUT received string do not match sent string, \nexpected: {}\nwith length {}\
+                                \nreceived: {}\nwith length {}'.format(
+                        send_msg, len(send_msg), recv_msg, len(recv_msg)))
+
+    # Test for receiving the first fragment of a large message:
+    # Verifies the WebSocket's ability to correctly process the initial segment of a fragmented message.
+    def test_recv_fragmented_msg1(dut):
+        dut.expect('websocket: Total payload length=2000, data_len=1024, current payload offset=0')
+
+    # Test for receiving the second fragment of a large message:
+    # Confirms that the WebSocket can correctly handle and process the subsequent segment of a fragmented message.
+    def test_recv_fragmented_msg2(dut):
+        dut.expect('websocket: Total payload length=2000, data_len=976, current payload offset=1024')
+
+    # Test for receiving fragmented text messages:
+    # Checks if the WebSocket can accurately reconstruct a message sent in several smaller parts.
+    def test_fragmented_txt_msg(dut):
+        dut.expect('Received=' + 32 * 'a' + 32 * 'b')
+        print('\nFragmented data received\n')
+
+    # Extract the hexdump portion of the log line
+    def parse_hexdump(line):
+        match = re.search(r'\(.*\) Received binary data: ([0-9A-Fa-f ]+)', line)
+        if match:
+            hexdump = match.group(1).strip().replace(' ', '')
+            # Convert the hexdump string to a bytearray
+            return bytearray.fromhex(hexdump)
+        return bytearray()
+
+    # Capture the binary log output from the DUT
+    def test_fragmented_binary_msg(dut):
+        match = dut.expect(r'\(.*\) Received binary data: .*')
+        if match:
+            line = match.group(0).strip()
+            if isinstance(line, bytes):
+                line = line.decode('utf-8')
+
+            # Parse the hexdump from the log line
+            received_data = parse_hexdump(line)
+
+            # Create the expected bytearray with the specified pattern
+            expected_data = bytearray([0, 0, 0, 0, 0, 1, 1, 1, 1, 1])
+
+            # Validate the received data
+            assert received_data == expected_data, f'Received data does not match expected data. Received: {received_data}, Expected: {expected_data}'
+            print('\nFragmented data received\n')
+        else:
+            assert False, 'Log line with binary data not found'
+
+    # Starting of the test
+    try:
+        if dut.app.sdkconfig.get('WEBSOCKET_URI_FROM_STDIN') is True:
+            uri_from_stdin = True
+        else:
+            uri = dut.app.sdkconfig['WEBSOCKET_URI']
+            uri_from_stdin = False
+
+        if dut.app.sdkconfig.get('WS_OVER_TLS_MUTUAL_AUTH') is True:
+            use_tls = True
+            client_verify = True
+        else:
+            use_tls = False
+            client_verify = False
+
+    except Exception:
+        print('ENV_TEST_FAILURE: Cannot find uri settings in sdkconfig')
+        raise
+
+    if uri_from_stdin:
+        server_port = 8080
+        with WebsocketServer(server_port, use_tls, client_verify) as ws:
+            if use_tls is True:
+                uri = 'wss://{}:{}'.format(get_my_ip(), server_port)
+            else:
+                uri = 'ws://{}:{}'.format(get_my_ip(), server_port)
+            print('DUT connecting to {}'.format(uri))
+            dut.expect("Please enter WebSocket endpoint URI", timeout=30)
+            dut.write(uri)
+            test_echo(dut)
+            test_recv_long_msg(dut, ws, 2000, 3)
+            test_json(dut, ws)
+            test_fragmented_txt_msg(dut)
+            test_fragmented_binary_msg(dut)
+            test_recv_fragmented_msg1(dut)
+            test_recv_fragmented_msg2(dut)
+            test_close(dut)
+    else:
+        print('DUT connecting to {}'.format(uri))
+        test_echo(dut)

esp32/managed_components/espressif__esp_websocket_client/examples/target/websocket_server.py

@@ -0,0 +1,148 @@
+# SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Unlicense OR CC0-1.0
+import socket
+import ssl
+from threading import Event, Thread
+
+from SimpleWebSocketServer import (SimpleSSLWebSocketServer,
+                                   SimpleWebSocketServer, WebSocket)
+
+
+def get_my_ip():
+    """Get the local IP address of this machine."""
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    try:
+        # doesn't even have to be reachable
+        s.connect(('8.8.8.8', 1))
+        IP = s.getsockname()[0]
+    except Exception:
+        IP = '127.0.0.1'
+    finally:
+        s.close()
+    return IP
+
+
+class WebsocketTestEcho(WebSocket):
+    """WebSocket handler that echoes back received messages."""
+
+    def handleMessage(self):
+        if isinstance(self.data, bytes):
+            print(f'\n Server received binary data: {self.data.hex()}\n')
+            self.sendMessage(self.data, binary=True)
+        else:
+            print(f'\n Server received: {self.data}\n')
+            self.sendMessage(self.data)
+
+    def handleConnected(self):
+        print('Connection from: {}'.format(self.address))
+
+    def handleClose(self):
+        print('{} closed the connection'.format(self.address))
+
+
+class WebsocketServer:
+    """WebSocket server for testing purposes."""
+
+    def __init__(self, port, use_tls=False, client_verify=False):
+        self.port = port
+        self.use_tls = use_tls
+        self.client_verify = client_verify
+        self.exit_event = Event()
+        self.thread = None
+        self.server = None
+
+    def send_data(self, data):
+        """Send data to all connected clients."""
+        if self.server and hasattr(self.server, 'connections'):
+            for nr, conn in self.server.connections.items():
+                conn.sendMessage(data)
+
+    def run(self):
+        """Run the WebSocket server."""
+        if self.use_tls:
+            ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
+            ssl_context.load_cert_chain(
+                certfile='main/certs/server/server_cert.pem',
+                keyfile='main/certs/server/server_key.pem'
+            )
+            if self.client_verify:
+                ssl_context.load_verify_locations(cafile='main/certs/ca_cert.pem')
+                ssl_context.verify_mode = ssl.CERT_REQUIRED
+            ssl_context.check_hostname = False
+            self.server = SimpleSSLWebSocketServer('', self.port, WebsocketTestEcho, ssl_context=ssl_context)
+        else:
+            self.server = SimpleWebSocketServer('', self.port, WebsocketTestEcho)
+
+        print(f"WebSocket server starting on port {self.port} (TLS: {self.use_tls}, Client verify: {self.client_verify})")
+
+        while not self.exit_event.is_set():
+            self.server.serveonce()
+
+    def start(self):
+        """Start the server in a separate thread."""
+        self.thread = Thread(target=self.run)
+        self.thread.start()
+
+    def stop(self):
+        """Stop the server."""
+        self.exit_event.set()
+        if self.thread:
+            self.thread.join(10)
+            if self.thread.is_alive():
+                print('Thread cannot be joined', 'orange')
+
+    def __enter__(self):
+        """Context manager entry."""
+        self.start()
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        """Context manager exit."""
+        self.stop()
+
+
+def create_websocket_server(port, use_tls=False, client_verify=False):
+    """Factory function to create a WebSocket server."""
+    return WebsocketServer(port, use_tls, client_verify)
+
+
+def run_forever(port=8080, use_tls=False, client_verify=False):
+    """Run WebSocket server forever (for standalone use)."""
+    print(f"Starting WebSocket server on port {port}")
+    print(f"TLS enabled: {use_tls}")
+    print(f"Client verification: {client_verify}")
+    print(f"Server IP: {get_my_ip()}")
+    print(f"Connect with-->{'wss' if use_tls else 'ws'}://{get_my_ip()}:{port}")
+    print("Press Ctrl+C to stop the server")
+
+    server = WebsocketServer(port, use_tls, client_verify)
+
+    try:
+        server.start()
+        # Wait for the server thread to complete or be interrupted
+        server.thread.join()
+    except KeyboardInterrupt:
+        print("\nServer stopped by user")
+    except Exception as e:
+        print(f"Server error: {e}")
+    finally:
+        server.stop()
+
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser(description="WebSocket Test Server")
+    parser.add_argument("--port", type=int, default=8080, help="Server port (default: 8080)")
+    parser.add_argument("--tls", action="store_true", help="Enable TLS/WSS")
+    parser.add_argument("--client-verify", action="store_true", help="Require client certificate verification")
+
+    args = parser.parse_args()
+
+    # Usage examples:
+    # python3 websocket_server.py                           # Plain WebSocket on port 8080
+    # python3 websocket_server.py --tls                   # TLS WebSocket on port 8080
+    # python3 websocket_server.py --tls --client-verify   # TLS with client cert verification
+    # python3 websocket_server.py --port 9000 --tls      # Custom port with TLS
+
+    run_forever(port=args.port, use_tls=args.tls, client_verify=args.client_verify)

esp32/managed_components/espressif__esp_websocket_client/idf_component.yml

@@ -0,0 +1,10 @@
+dependencies:
+  idf:
+    version: '>=5.0'
+description: WebSocket protocol client for ESP-IDF
+repository: git://github.com/espressif/esp-protocols.git
+repository_info:
+  commit_sha: b7f3de500a4fd4b58e4248093067058959833260
+  path: components/esp_websocket_client
+url: https://github.com/espressif/esp-protocols/tree/master/components/esp_websocket_client
+version: 1.6.1

esp32/managed_components/espressif__esp_websocket_client/include/esp_websocket_client.h

@@ -0,0 +1,492 @@
+/*
+ * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _ESP_WEBSOCKET_CLIENT_H_
+#define _ESP_WEBSOCKET_CLIENT_H_
+
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include "freertos/FreeRTOS.h"
+#include "esp_err.h"
+#include "esp_event.h"
+#include "esp_idf_version.h"
+#include <sys/socket.h>
+#include "esp_transport_ws.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0)
+// Features supported in 6.0.0
+#define WS_TRANSPORT_HEADER_CALLBACK_SUPPORT    1
+#else
+#define WS_TRANSPORT_HEADER_CALLBACK_SUPPORT    0
+#endif
+
+typedef struct esp_websocket_client *esp_websocket_client_handle_t;
+
+ESP_EVENT_DECLARE_BASE(WEBSOCKET_EVENTS);         // declaration of the task events family
+
+/**
+ * @brief Websocket Client events id
+ */
+typedef enum {
+    WEBSOCKET_EVENT_ANY = -1,
+    WEBSOCKET_EVENT_ERROR = 0,      /*!< This event occurs when there are any errors during execution */
+#if WS_TRANSPORT_HEADER_CALLBACK_SUPPORT
+    WEBSOCKET_EVENT_HEADER_RECEIVED,/*!< This event occurs for each pre-upgrade HTTP header */
+#endif
+    WEBSOCKET_EVENT_CONNECTED,      /*!< Once the Websocket has been connected to the server, no data exchange has been performed */
+    WEBSOCKET_EVENT_DISCONNECTED,   /*!< The connection has been disconnected */
+    WEBSOCKET_EVENT_DATA,           /*!< When receiving data from the server, possibly multiple portions of the packet */
+    WEBSOCKET_EVENT_CLOSED,         /*!< The connection has been closed cleanly */
+    WEBSOCKET_EVENT_BEFORE_CONNECT, /*!< The event occurs before connecting */
+    WEBSOCKET_EVENT_BEGIN,          /*!< The event occurs once after thread creation, before event loop */
+    WEBSOCKET_EVENT_FINISH,         /*!< The event occurs once after event loop, before thread destruction */
+    WEBSOCKET_EVENT_MAX
+} esp_websocket_event_id_t;
+
+/**
+ * @brief Websocket connection error codes propagated via ERROR event
+ */
+typedef enum {
+    WEBSOCKET_ERROR_TYPE_NONE = 0,
+    WEBSOCKET_ERROR_TYPE_TCP_TRANSPORT,
+    WEBSOCKET_ERROR_TYPE_PONG_TIMEOUT,
+    WEBSOCKET_ERROR_TYPE_HANDSHAKE,
+    WEBSOCKET_ERROR_TYPE_SERVER_CLOSE
+} esp_websocket_error_type_t;
+
+/**
+ * @brief Websocket error code structure to be passed as a contextual information into ERROR event
+ */
+typedef struct {
+    /* compatible portion of the struct corresponding to struct esp_tls_last_error */
+    esp_err_t esp_tls_last_esp_err;             /*!< last esp_err code reported from esp-tls component */
+    int       esp_tls_stack_err;                /*!< tls specific error code reported from underlying tls stack */
+    int       esp_tls_cert_verify_flags;        /*!< tls flags reported from underlying tls stack during certificate verification */
+    /* esp-websocket specific structure extension */
+    esp_websocket_error_type_t error_type;
+    int esp_ws_handshake_status_code;           /*!< http status code of the websocket upgrade handshake */
+    /* tcp_transport extension */
+    int       esp_transport_sock_errno;         /*!< errno from the underlying socket */
+} esp_websocket_error_codes_t;
+
+/**
+ * @brief Websocket event data
+ */
+typedef struct {
+    const char *data_ptr;                   /*!< Data pointer */
+    int data_len;                           /*!< Data length */
+    bool fin;                               /*!< Fin flag */
+    uint8_t op_code;                        /*!< Received opcode */
+    esp_websocket_client_handle_t client;   /*!< esp_websocket_client_handle_t context */
+    void *user_context;                     /*!< user_data context, from esp_websocket_client_config_t user_data */
+    int payload_len;                        /*!< Total payload length, payloads exceeding buffer will be posted through multiple events */
+    int payload_offset;                     /*!< Actual offset for the data associated with this event */
+    esp_websocket_error_codes_t error_handle; /*!< esp-websocket error handle including esp-tls errors as well as internal websocket errors */
+} esp_websocket_event_data_t;
+
+/**
+ * @brief Websocket Client transport
+ */
+typedef enum {
+    WEBSOCKET_TRANSPORT_UNKNOWN = 0x0,  /*!< Transport unknown */
+    WEBSOCKET_TRANSPORT_OVER_TCP,       /*!< Transport over tcp */
+    WEBSOCKET_TRANSPORT_OVER_SSL,       /*!< Transport over ssl */
+} esp_websocket_transport_t;
+
+/**
+ * @brief Websocket client setup configuration
+ */
+typedef struct {
+    const char                  *uri;                       /*!< Websocket URI, the information on the URI can be overrides the other fields below, if any */
+    const char                  *host;                      /*!< Domain or IP as string */
+    int                         port;                       /*!< Port to connect, default depend on esp_websocket_transport_t (80 or 443) */
+    const char                  *username;                  /*!< Using for Http authentication, only support basic auth now */
+    const char                  *password;                  /*!< Using for Http authentication */
+    const char                  *path;                      /*!< HTTP Path, if not set, default is `/` */
+    bool                        disable_auto_reconnect;     /*!< Disable the automatic reconnect function when disconnected */
+    bool                        enable_close_reconnect;     /*!< Enable reconnect after server close */
+    void                        *user_context;              /*!< HTTP user data context */
+    int                         task_prio;                  /*!< Websocket task priority */
+    const char                 *task_name;                  /*!< Websocket task name */
+    int                         task_stack;                 /*!< Websocket task stack */
+    int                         buffer_size;                /*!< Websocket buffer size */
+    const char                  *cert_pem;                  /*!< Pointer to certificate data in PEM or DER format for server verify (with SSL), default is NULL, not required to verify the server. PEM-format must have a terminating NULL-character. DER-format requires the length to be passed in cert_len. */
+    size_t                      cert_len;                   /*!< Length of the buffer pointed to by cert_pem. May be 0 for null-terminated pem */
+    const char                  *client_cert;               /*!< Pointer to certificate data in PEM or DER format for SSL mutual authentication, default is NULL, not required if mutual authentication is not needed. If it is not NULL, also `client_key` or `client_ds_data` (if supported) has to be provided. PEM-format must have a terminating NULL-character. DER-format requires the length to be passed in client_cert_len. */
+    size_t                      client_cert_len;            /*!< Length of the buffer pointed to by client_cert. May be 0 for null-terminated pem */
+    const char                  *client_key;                /*!< Pointer to private key data in PEM or DER format for SSL mutual authentication, default is NULL, not required if mutual authentication is not needed. If it is not NULL, also `client_cert` has to be provided and `client_ds_data` (if supported) gets ignored. PEM-format must have a terminating NULL-character. DER-format requires the length to be passed in client_key_len */
+    size_t                      client_key_len;             /*!< Length of the buffer pointed to by client_key_pem. May be 0 for null-terminated pem */
+#if CONFIG_ESP_TLS_USE_DS_PERIPHERAL
+    void                        *client_ds_data;            /*!< Pointer to the encrypted private key data for SSL mutual authentication using the DS peripheral, default is NULL, not required if mutual authentication is not needed. If it is not NULL, also `client_cert` has to be provided. It is ignored if `client_key` is provided */
+#endif
+    esp_websocket_transport_t   transport;                  /*!< Websocket transport type, see `esp_websocket_transport_t */
+    const char                  *subprotocol;               /*!< Websocket subprotocol */
+    const char                  *user_agent;                /*!< Websocket user-agent */
+    const char                  *headers;                   /*!< Websocket additional headers */
+    int                         pingpong_timeout_sec;       /*!< Period before connection is aborted due to no PONGs received */
+    bool                        disable_pingpong_discon;    /*!< Disable auto-disconnect due to no PONG received within pingpong_timeout_sec */
+    bool                        use_global_ca_store;        /*!< Use a global ca_store for all the connections in which this bool is set. */
+    esp_err_t (*crt_bundle_attach)(void *conf);             /*!< Function pointer to esp_crt_bundle_attach. Enables the use of certification bundle for server verification, MBEDTLS_CERTIFICATE_BUNDLE must be enabled in menuconfig. Include esp_crt_bundle.h, and use `esp_crt_bundle_attach` here to include bundled CA certificates. */
+    const char                  *cert_common_name;          /*!< Expected common name of the server certificate */
+    bool                        skip_cert_common_name_check;/*!< Skip any validation of server certificate CN field */
+    bool                        keep_alive_enable;          /*!< Enable keep-alive timeout */
+    int                         keep_alive_idle;            /*!< Keep-alive idle time. Default is 5 (second) */
+    int                         keep_alive_interval;        /*!< Keep-alive interval time. Default is 5 (second) */
+    int                         keep_alive_count;           /*!< Keep-alive packet retry send count. Default is 3 counts */
+    int                         reconnect_timeout_ms;       /*!< Reconnect after this value in miliseconds if disable_auto_reconnect is not enabled (defaults to 10s) */
+    int                         network_timeout_ms;         /*!< Abort network operation if it is not completed after this value, in milliseconds (defaults to 10s) */
+    size_t                      ping_interval_sec;          /*!< Websocket ping interval, defaults to 10 seconds if not set */
+    struct ifreq                *if_name;                   /*!< The name of interface for data to go through. Use the default interface without setting */
+    esp_transport_handle_t      ext_transport;              /*!< External WebSocket tcp_transport handle to the client; or if null, the client will create its own transport handle. */
+} esp_websocket_client_config_t;
+
+/**
+ * @brief      Start a Websocket session
+ *             This function must be the first function to call,
+ *             and it returns a esp_websocket_client_handle_t that you must use as input to other functions in the interface.
+ *             This call MUST have a corresponding call to esp_websocket_client_destroy when the operation is complete.
+ *
+ * @param[in]  config  The configuration
+ *
+ * @return
+ *     - `esp_websocket_client_handle_t`
+ *     - NULL if any errors
+ */
+esp_websocket_client_handle_t esp_websocket_client_init(const esp_websocket_client_config_t *config);
+
+/**
+ * @brief      Set URL for client, when performing this behavior, the options in the URL will replace the old ones
+ *             Must stop the WebSocket client before set URI if the client has been connected
+ *
+ * @param[in]  client  The client
+ * @param[in]  uri     The uri
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_set_uri(esp_websocket_client_handle_t client, const char *uri);
+
+/**
+ * @brief      Set additional websocket headers for the client, when performing this behavior, the headers will replace the old ones
+ * @pre        Must stop the WebSocket client before set headers if the client has been connected
+ *
+ *    - This API should be used after the WebSocket client connection has succeeded (i.e., once the transport layer is initialized).
+ *    - If you wish to set or append headers before the WebSocket client connection is established(before handshake), consider the following options:
+ *       1. Input headers directly into the config options, terminating each item with [CR][LF]. This approach will replace any previous headers.
+ *          Example: websocket_cfg.headers = "Sec-WebSocket-Key: my_key\r\nPassword: my_pass\r\n";
+ *       2. Use the `esp_websocket_client_append_header` API to append a single header to the current set.
+ *
+ * @param[in]  client  The WebSocket client handle
+ * @param[in]  headers Additional header strings each terminated with [CR][LF]
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_set_headers(esp_websocket_client_handle_t client, const char *headers);
+
+/**
+ * @brief      Appends a new key-value pair to the headers of a WebSocket client.
+ * @pre        Ensure that this function is called before starting the WebSocket client.
+ *
+ * @param[in]  client  The WebSocket client handle
+ * @param[in]  key     The header key to append
+ * @param[in]  value   The associated value for the given key
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_append_header(esp_websocket_client_handle_t client, const char *key, const char *value);
+
+/**
+ * @brief      Open the WebSocket connection
+ *
+ * @param[in]  client  The client
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_start(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      Stops the WebSocket connection without websocket closing handshake
+ *
+ * This API stops ws client and closes TCP connection directly without sending
+ * close frames. It is a good practice to close the connection in a clean way
+ * using esp_websocket_client_close().
+ *
+ *  Notes:
+ *  - Cannot be called from the websocket event handler
+ *
+ * @param[in]  client  The client
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_stop(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      Destroy the WebSocket connection and free all resources.
+ *             This function must be the last function to call for an session.
+ *             It is the opposite of the esp_websocket_client_init function and must be called with the same handle as input that a esp_websocket_client_init call returned.
+ *             This might close all connections this handle has used.
+ *
+ *  Notes:
+ *  - Cannot be called from the websocket event handler
+ *
+ * @param[in]  client  The client
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_destroy(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      If this API called, WebSocket client will destroy and free all resources at the end of event loop.
+ *
+ *  Notes:
+ *  - After event loop finished, client handle would be dangling and should never be used
+ *
+ * @param[in]  client      The client
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_destroy_on_exit(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      Write binary data to the WebSocket connection (data send with WS OPCODE=02, i.e. binary)
+ *
+ * @param[in]  client  The client
+ * @param[in]  data    The data
+ * @param[in]  len     The length
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_bin(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Write binary data to the WebSocket connection and sends it without setting the FIN flag(data send with WS OPCODE=02, i.e. binary)
+ *
+ *  Notes:
+ *   - To send continuation frame, you should use 'esp_websocket_client_send_cont_msg(...)' API.
+ *   - To mark the end of fragmented data, you should use the 'esp_websocket_client_send_fin(...)' API. This sends a FIN frame.
+ *
+ * @param[in]  client  The client
+ * @param[in]  data    The data
+ * @param[in]  len     The length
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_bin_partial(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Write textual data to the WebSocket connection (data send with WS OPCODE=01, i.e. text)
+ *
+ * @param[in]  client  The client
+ * @param[in]  data    The data
+ * @param[in]  len     The length
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_text(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Write textual data to the WebSocket connection and sends it without setting the FIN flag(data send with WS OPCODE=01, i.e. text)
+ *
+ *  Notes:
+ *   - To send continuation frame, you should use 'esp_websocket_client_send_cont_mgs(...)' API.
+ *   - To mark the end of fragmented data, you should use the 'esp_websocket_client_send_fin(...)' API. This sends a FIN frame.
+ *
+ * @param[in]  client  The client
+ * @param[in]  data    The data
+ * @param[in]  len     The length
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_text_partial(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Write textual data to the WebSocket connection and sends it as continuation frame (OPCODE=0x0)
+ *
+ *  Notes:
+ *   - Continuation frames have an opcode of 0x0 and do not explicitly signify whether they are continuing a text or a binary message.
+ *   - You determine the type of message (text or binary) being continued by looking at the opcode of the initial frame in the sequence of fragmented frames.
+ *   - To mark the end of fragmented data, you should use the 'esp_websocket_client_send_fin(...)' API. This sends a FIN frame.
+ *
+ * @param[in]  client  The client
+ * @param[in]  data    The data
+ * @param[in]  len     The length
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_cont_msg(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Sends FIN frame
+ *
+ * @param[in]  client  The client
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_fin(esp_websocket_client_handle_t client, TickType_t timeout);
+
+/**
+ * @brief      Write opcode data to the WebSocket connection
+ *
+ * @param[in]  client  The client
+ * @param[in]  opcode  The opcode
+ * @param[in]  data    The data
+ * @param[in]  len     The length
+ * @param[in]  timeout Write data timeout in RTOS ticks
+ *
+ *  Notes:
+ *  - In order to send a zero payload, data and len should be set to NULL/0
+ *  - This API sets the FIN bit on the last fragment of message
+ *
+ *
+ * @return
+ *     - Number of data was sent
+ *     - (-1) if any errors
+ */
+int esp_websocket_client_send_with_opcode(esp_websocket_client_handle_t client, ws_transport_opcodes_t opcode, const uint8_t *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Close the WebSocket connection in a clean way
+ *
+ * Sequence of clean close initiated by client:
+ * * Client sends CLOSE frame
+ * * Client waits until server echos the CLOSE frame
+ * * Client waits until server closes the connection
+ * * Client is stopped the same way as by the `esp_websocket_client_stop()`
+ *
+ *  Notes:
+ *  - Cannot be called from the websocket event handler
+ *
+ * @param[in]  client  The client
+ * @param[in]  timeout Timeout in RTOS ticks for waiting
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_close(esp_websocket_client_handle_t client, TickType_t timeout);
+
+/**
+ * @brief      Close the WebSocket connection in a clean way with custom code/data
+ *             Closing sequence is the same as for esp_websocket_client_close()
+ *
+ *  Notes:
+ *  - Cannot be called from the websocket event handler
+ *
+ * @param[in]  client  The client
+ * @param[in]  code    Close status code as defined in RFC6455 section-7.4
+ * @param[in]  data    Additional data to closing message
+ * @param[in]  len     The length of the additional data
+ * @param[in]  timeout Timeout in RTOS ticks for waiting
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_close_with_code(esp_websocket_client_handle_t client, int code, const char *data, int len, TickType_t timeout);
+
+/**
+ * @brief      Check the WebSocket client connection state
+ *
+ * @param[in]  client  The client handle
+ *
+ * @return
+ *     - true
+ *     - false
+ */
+bool esp_websocket_client_is_connected(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      Get the ping interval sec for client.
+ *
+ * @param[in]  client             The client
+ *
+ * @return     The ping interval in sec
+ */
+size_t esp_websocket_client_get_ping_interval_sec(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      Set new ping interval sec for client.
+ *
+ * @param[in]  client             The client
+ * @param[in]  ping_interval_sec  The new interval
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_set_ping_interval_sec(esp_websocket_client_handle_t client, size_t ping_interval_sec);
+
+/**
+ * @brief      Get the next reconnect timeout for client. Returns -1 when client is not initialized or automatic reconnect is disabled.
+ *
+ * @param[in]  client             The client
+ *
+ * @return     Reconnect timeout in msec
+ */
+int esp_websocket_client_get_reconnect_timeout(esp_websocket_client_handle_t client);
+
+/**
+ * @brief      Set next reconnect timeout for client.
+ *
+ *  Notes:
+ *  - Changing this value when reconnection delay is already active does not immediately affect the active delay and may have unexpected result.
+ *  - Good place to change this value is when handling WEBSOCKET_EVENT_DISCONNECTED or WEBSOCKET_EVENT_ERROR events.
+ *
+ * @param[in]  client             The client
+ * @param[in]  reconnect_timeout_ms  The new timeout
+ *
+ * @return     esp_err_t
+ */
+esp_err_t esp_websocket_client_set_reconnect_timeout(esp_websocket_client_handle_t client, int reconnect_timeout_ms);
+
+/**
+ * @brief Register the Websocket Events
+ *
+ * @param client            The client handle
+ * @param event             The event id
+ * @param event_handler     The callback function
+ * @param event_handler_arg User context
+ * @return esp_err_t
+ */
+esp_err_t esp_websocket_register_events(esp_websocket_client_handle_t client,
+                                        esp_websocket_event_id_t event,
+                                        esp_event_handler_t event_handler,
+                                        void *event_handler_arg);
+
+/**
+ * @brief Unegister the Websocket Events
+ *
+ * @param client            The client handle
+ * @param event             The event id
+ * @param event_handler     The callback function
+ * @return esp_err_t
+ */
+esp_err_t esp_websocket_unregister_events(esp_websocket_client_handle_t client,
+                                          esp_websocket_event_id_t event,
+                                          esp_event_handler_t event_handler);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

esp32/managed_components/espressif__esp_websocket_client/test/CMakeLists.txt

@@ -0,0 +1,15 @@
+# This is the project CMakeLists.txt file for the test subproject
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+if("${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}" VERSION_GREATER_EQUAL "6.0")
+    set(test_component_dir $ENV{IDF_PATH}/tools/test_apps/components)
+else()
+    set(test_component_dir $ENV{IDF_PATH}/tools/unit-test-app/components)
+endif()
+
+set(EXTRA_COMPONENT_DIRS    ../../esp_websocket_client
+                            ${test_component_dir})
+
+project(websocket_unit_test)

esp32/managed_components/espressif__esp_websocket_client/test/main/CMakeLists.txt

@@ -0,0 +1,4 @@
+idf_component_register(SRCS "test_websocket_client.c"
+                       REQUIRES test_utils
+                       INCLUDE_DIRS "."
+                       PRIV_REQUIRES unity esp_websocket_client esp_event)

esp32/managed_components/espressif__esp_websocket_client/test/main/test_websocket_client.c

@@ -0,0 +1,83 @@
+/*
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Unlicense OR CC0-1.0
+ *
+ * This test code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
+ */
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <esp_websocket_client.h>
+#include "esp_event.h"
+#include "unity.h"
+#include "test_utils.h"
+
+#include "unity_fixture.h"
+#include "memory_checks.h"
+
+TEST_GROUP(websocket);
+
+TEST_SETUP(websocket)
+{
+#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 1, 0)
+    /* IDF v5.0 runs some lazy inits within printf()
+     * This test sets the leak threshold to 0, so we need to call printf()
+     * before recording the heap size in test_utils_record_free_mem()
+     */
+    printf("TEST_SETUP: websocket\n");
+#endif
+    test_utils_record_free_mem();
+    TEST_ESP_OK(test_utils_set_leak_level(0, ESP_LEAK_TYPE_CRITICAL, ESP_COMP_LEAK_GENERAL));
+}
+
+TEST_TEAR_DOWN(websocket)
+{
+    test_utils_finish_and_evaluate_leaks(0, 0);
+}
+
+
+TEST(websocket, websocket_init_deinit)
+{
+    const esp_websocket_client_config_t websocket_cfg = {
+        // no connection takes place, but the uri has to be valid for init() to succeed
+        .uri = "ws://echo.websocket.org",
+    };
+    esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
+    TEST_ASSERT_NOT_EQUAL(NULL, client);
+    esp_websocket_client_destroy(client);
+}
+
+TEST(websocket, websocket_init_invalid_url)
+{
+    const esp_websocket_client_config_t websocket_cfg = {
+        .uri = "INVALID",
+    };
+    esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
+    TEST_ASSERT_NULL(client);
+}
+
+TEST(websocket, websocket_set_invalid_url)
+{
+    const esp_websocket_client_config_t websocket_cfg = {};
+    esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
+    TEST_ASSERT_NOT_EQUAL(NULL, client);
+    TEST_ASSERT_NOT_EQUAL(ESP_OK, esp_websocket_client_set_uri(client, "INVALID"));
+    esp_websocket_client_destroy(client);
+}
+
+TEST_GROUP_RUNNER(websocket)
+{
+    RUN_TEST_CASE(websocket, websocket_init_deinit)
+    RUN_TEST_CASE(websocket, websocket_init_invalid_url)
+    RUN_TEST_CASE(websocket, websocket_set_invalid_url)
+}
+
+void app_main(void)
+{
+    UNITY_MAIN(websocket);
+}

esp32/managed_components/espressif__esp_websocket_client/test/pytest_websocket.py

@@ -0,0 +1,8 @@
+# SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
+
+from pytest_embedded import Dut
+
+
+def test_websocket(dut: Dut) -> None:
+    dut.expect_unity_test_output()