Initial Ktor backend skeleton with ProtocolMessage DTO, REST and WebSocket

.gitignore

@@ -1,23 +1,25 @@
-# Kotlin/Java
-*.class
-*.jar
-*.iml
-/out/
+# Gradle/Java/Kotlin
+.gradle/
 build/
+out/
+*.iml
 
-# ESP32 / PlatformIO / Arduino
-*.bin
-*.elf
-*.pio
-*.pioenvs/
-*.idf/
-
-# Android
-/.gradle/
-/build/
-/local.properties
+# IDEA
 .idea/
+*.iws
+*.ipr
+
+# Logs
+*.log
 
 # OS
 .DS_Store
 Thumbs.db
+
+# Node/npm (если есть frontend/mobile)
+node_modules/
+dist/
+
+# Python (если будет)
+__pycache__/
+*.pyc

backend/.gradle/buildOutputCleanup/cache.properties

@@ -1,2 +0,0 @@
-#Mon Mar 30 18:39:06 EEST 2026
-gradle.version=9.3.0

protocol/examples/command.json

@@ -0,0 +1,13 @@
+{
+  "v": 1,
+  "id": "cmd-123",
+  "type": "command",
+  "ts": 1710000000,
+  "deviceId": "esp32-001",
+  "payload": {
+    "command": "setRelay",
+    "params": {
+      "state": true
+    }
+  }
+}

protocol/examples/event.json

@@ -0,0 +1,12 @@
+{
+  "v": 1,
+  "id": "evt-123",
+  "type": "event",
+  "ts": 1710000003,
+  "deviceId": "esp32-001",
+  "payload": {
+    "event": "overheat",
+    "level": "warning",
+    "message": "Temperature too high"
+  }
+}

protocol/examples/response.json

@@ -0,0 +1,12 @@
+{
+  "v": 1,
+  "id": "resp-123",
+  "type": "response",
+  "ts": 1710000001,
+  "deviceId": "esp32-001",
+  "payload": {
+    "requestId": "cmd-123",
+    "status": "ok",
+    "data": {}
+  }
+}

protocol/examples/telemetry.json

@@ -0,0 +1,12 @@
+{
+  "v": 1,
+  "id": "tel-123",
+  "type": "telemetry",
+  "ts": 1710000002,
+  "deviceId": "esp32-001",
+  "payload": {
+    "voltage": 220.5,
+    "current": 1.2,
+    "temperature": 36.6
+  }
+}

protocol/schema.json

@@ -0,0 +1,12 @@
+{
+  "type": "object",
+  "required": ["v", "id", "type", "ts", "deviceId", "payload"],
+  "properties": {
+    "v": { "type": "integer" },
+    "id": { "type": "string" },
+    "type": { "type": "string" },
+    "ts": { "type": "integer" },
+    "deviceId": { "type": "string" },
+    "payload": { "type": "object" }
+  }
+}