diff --git a/backend/.gradle/9.3.0/checksums/checksums.lock b/backend/.gradle/9.3.0/checksums/checksums.lock
new file mode 100644
index 0000000..29c0f90
Binary files /dev/null and b/backend/.gradle/9.3.0/checksums/checksums.lock differ
diff --git a/backend/.gradle/9.3.0/executionHistory/executionHistory.lock b/backend/.gradle/9.3.0/executionHistory/executionHistory.lock
new file mode 100644
index 0000000..a7e714d
Binary files /dev/null and b/backend/.gradle/9.3.0/executionHistory/executionHistory.lock differ
diff --git a/backend/.gradle/9.3.0/fileHashes/fileHashes.lock b/backend/.gradle/9.3.0/fileHashes/fileHashes.lock
new file mode 100644
index 0000000..9a1338e
Binary files /dev/null and b/backend/.gradle/9.3.0/fileHashes/fileHashes.lock differ
diff --git a/backend/.gradle/9.3.0/gc.properties b/backend/.gradle/9.3.0/gc.properties
new file mode 100644
index 0000000..e69de29
diff --git a/backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock
new file mode 100644
index 0000000..ebdd3e2
Binary files /dev/null and b/backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/backend/.gradle/buildOutputCleanup/cache.properties b/backend/.gradle/buildOutputCleanup/cache.properties
new file mode 100644
index 0000000..072f68f
--- /dev/null
+++ b/backend/.gradle/buildOutputCleanup/cache.properties
@@ -0,0 +1,2 @@
+#Mon Mar 30 18:39:06 EEST 2026
+gradle.version=9.3.0
diff --git a/backend/.gradle/file-system.probe b/backend/.gradle/file-system.probe
new file mode 100644
index 0000000..6fcb255
Binary files /dev/null and b/backend/.gradle/file-system.probe differ
diff --git a/backend/.gradle/vcs-1/gc.properties b/backend/.gradle/vcs-1/gc.properties
new file mode 100644
index 0000000..e69de29
diff --git a/backend/build.gradle.kts b/backend/build.gradle.kts
new file mode 100644
index 0000000..2b260ec
--- /dev/null
+++ b/backend/build.gradle.kts
@@ -0,0 +1,29 @@
+#!/usr/bin/env kotlin
+
+plugins {
+    kotlin("jvm") version "1.9.22"
+    kotlin("plugin.serialization") version "1.9.22"
+    application
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("io.ktor:ktor-server-core:2.3.7")
+    implementation("io.ktor:ktor-server-netty:2.3.7")
+    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")
+
+    testImplementation(kotlin("test"))
+}
+
+application {
+    mainClass.set("org.pavloveugene.iot.backend.ApplicationKt")
+}
\ No newline at end of file
diff --git a/backend/gradle/wrapper/gradle-wrapper.properties b/backend/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..19a6bde
--- /dev/null
+++ b/backend/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/backend/gradlew b/backend/gradlew
new file mode 100755
index 0000000..adff685
--- /dev/null
+++ b/backend/gradlew
@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/backend/gradlew.bat b/backend/gradlew.bat
new file mode 100644
index 0000000..e509b2d
--- /dev/null
+++ b/backend/gradlew.bat
@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/backend/settings.gradle.kts b/backend/settings.gradle.kts
new file mode 100644
index 0000000..e69de29
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/Application.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/Application.kt
new file mode 100644
index 0000000..428ad9c
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/Application.kt
@@ -0,0 +1,40 @@
+package org.pavloveugene.iot.backend
+
+import io.ktor.server.application.*
+import io.ktor.server.engine.*
+import io.ktor.server.netty.*
+import io.ktor.server.plugins.contentnegotiation.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.routing.*
+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 java.time.Duration
+import org.pavloveugene.iot.backend.routes.*
+
+fun main() {
+    embeddedServer(
+        Netty,
+        port = AppConfig.serverPort,
+        host = AppConfig.serverHost,
+    ){
+        install(ContentNegotiation) {
+            json()
+        }
+
+        install(WebSockets) {
+            pingPeriod = Duration.ofSeconds(15)
+            timeout = Duration.ofSeconds(30)
+            maxFrameSize = Long.MAX_VALUE
+            masking = false
+        }
+
+        routing {
+            protocolRoutes()
+            protocolWebSocket()
+        }
+    }.start(wait = true)
+
+
+}
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/config/AppConfig.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/config/AppConfig.kt
new file mode 100644
index 0000000..22943cd
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/config/AppConfig.kt
@@ -0,0 +1,15 @@
+package org.pavloveugene.iot.backend.config
+
+import com.typesafe.config.ConfigFactory
+
+object AppConfig {
+    private val config = ConfigFactory.load()
+
+    val serverHost: String = config.getString("ktor.host")
+    val serverPort: Int = config.getInt("ktor.port")
+
+    val appName: String = config.getString("app.name")
+
+    val apiPrefix: String = config.getString("api.prefix")
+    val wsPath: String = config.getString("ws.path")
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/config/Plugins.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/config/Plugins.kt
new file mode 100644
index 0000000..29746c4
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/config/Plugins.kt
@@ -0,0 +1,29 @@
+package org.pavloveugene.iot.backend.config
+
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.application.*
+import io.ktor.server.plugins.contentnegotiation.*
+import io.ktor.server.websocket.*
+import kotlinx.serialization.json.Json
+import java.time.Duration
+
+fun Application.configureSerialization() {
+    install(ContentNegotiation) {
+        json(
+            Json {
+                prettyPrint = true
+                isLenient = true
+                ignoreUnknownKeys = true
+            }
+        )
+    }
+}
+
+fun Application.configureWebSockets() {
+    install(WebSockets) {
+        pingPeriod = Duration.ofSeconds(30)
+        timeout = Duration.ofSeconds(15)
+        maxFrameSize = Long.MAX_VALUE
+        masking = false
+    }
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/BaseMessageDto.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/BaseMessageDto.kt
new file mode 100644
index 0000000..5ab58d9
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/BaseMessageDto.kt
@@ -0,0 +1,15 @@
+package org.pavloveugene.iot.backend.dto
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonObject
+
+
+@Serializable
+data class BaseMessageDto(
+    val v: Int,
+    val id: String,
+    val type: String,
+    val ts: Long,
+    val deviceId: String,
+    val payload: JsonObject
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/ProtocolMessage.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/ProtocolMessage.kt
new file mode 100644
index 0000000..22f3a29
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/ProtocolMessage.kt
@@ -0,0 +1,15 @@
+package org.pavloveugene.iot.backend.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class ProtocolMessage(
+    val v: Int,
+    val id: String,
+    val type: String,
+    val ts: Long,
+    val deviceId: String,
+    val payload: JsonObject
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/TelemetryPayloadDto.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/TelemetryPayloadDto.kt
new file mode 100644
index 0000000..0cf2219
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/dto/TelemetryPayloadDto.kt
@@ -0,0 +1,10 @@
+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
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ApiRoutes.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ApiRoutes.kt
new file mode 100644
index 0000000..0776ce7
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ApiRoutes.kt
@@ -0,0 +1,4 @@
+package org.pavloveugene.iot.backend.routes
+
+class ApiRoutes {
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolRoutes.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolRoutes.kt
new file mode 100644
index 0000000..17350cc
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolRoutes.kt
@@ -0,0 +1,24 @@
+package org.pavloveugene.iot.backend.routes
+
+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 org.pavloveugene.iot.backend.config.AppConfig
+import org.pavloveugene.iot.backend.dto.ProtocolMessage
+
+fun Route.protocolRoutes() {
+    route(AppConfig.apiPrefix+"/protocol") {
+        get("/health") {
+            call.respond(HttpStatusCode.OK, mapOf("status" to "ok"))
+        }
+
+        post("/message") {
+            val message = call.receive<ProtocolMessage>()
+            // TODO: обработка сообщения
+            println("Received message: $message")
+            call.respond(HttpStatusCode.Accepted, mapOf("received" to message.id))
+        }
+    }
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolWebSocket.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolWebSocket.kt
new file mode 100644
index 0000000..e8a4bab
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/ProtocolWebSocket.kt
@@ -0,0 +1,48 @@
+package org.pavloveugene.iot.backend.routes
+
+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 kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.encodeToJsonElement
+import org.pavloveugene.iot.backend.config.AppConfig
+import org.pavloveugene.iot.backend.dto.ProtocolMessage
+import java.time.Duration
+
+fun Route.protocolWebSocket() {
+    val json = Json { prettyPrint = true }
+
+    webSocket(AppConfig.wsPath) {
+        send("Connected to IoT backend WebSocket")
+
+        for (frame in incoming) {
+            when (frame) {
+                is Frame.Text -> {
+                    val text = frame.readText()
+                    try {
+                        val message = json.decodeFromString<ProtocolMessage>(text)
+                        println("Received WS message: $message")
+                        // 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}")
+                    }
+                }
+                else -> {}
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/Routing.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/Routing.kt
new file mode 100644
index 0000000..9b1f8df
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/Routing.kt
@@ -0,0 +1,15 @@
+package org.pavloveugene.iot.backend.routes
+
+import io.ktor.server.application.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+
+fun Application.configureRouting() {
+    routing {
+        get("/api/v1/health") {
+            call.respond(mapOf(
+                "status" to "ok"
+            ))
+        }
+    }
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/WsRoutes.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/WsRoutes.kt
new file mode 100644
index 0000000..a604e4f
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/routes/WsRoutes.kt
@@ -0,0 +1,4 @@
+package org.pavloveugene.iot.backend.routes
+
+class WsRoutes {
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/services/DeviceManager.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/services/DeviceManager.kt
new file mode 100644
index 0000000..31c2dbd
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/services/DeviceManager.kt
@@ -0,0 +1,4 @@
+package org.pavloveugene.iot.backend.services
+
+class DeviceManager {
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/org/pavloveugene/iot/backend/utils/JsonUtils.kt b/backend/src/main/kotlin/org/pavloveugene/iot/backend/utils/JsonUtils.kt
new file mode 100644
index 0000000..557381d
--- /dev/null
+++ b/backend/src/main/kotlin/org/pavloveugene/iot/backend/utils/JsonUtils.kt
@@ -0,0 +1,4 @@
+package org.pavloveugene.iot.backend.utils
+
+class JsonUtils {
+}
\ No newline at end of file
diff --git a/backend/src/main/resources/application.conf b/backend/src/main/resources/application.conf
new file mode 100644
index 0000000..be53fdd
--- /dev/null
+++ b/backend/src/main/resources/application.conf
@@ -0,0 +1,16 @@
+ktor {
+  host = "0.0.0.0"
+  port = 8080
+}
+
+app {
+  name = "iot-backend"
+}
+
+api {
+  prefix = "/api/v1"
+}
+
+ws {
+  path = "/ws"
+}
\ No newline at end of file
diff --git a/backend/src/main/resources/application.yaml b/backend/src/main/resources/application.yaml
new file mode 100644
index 0000000..b2106fd
--- /dev/null
+++ b/backend/src/main/resources/application.yaml
@@ -0,0 +1,12 @@
+ktor:
+  host: 0.0.0.0
+  port: 8080
+
+app:
+  name: iot-backend
+
+api:
+  prefix: /api/v1
+
+ws:
+  path: /ws
\ No newline at end of file
diff --git a/backend/src/main/resources/logback.xml b/backend/src/main/resources/logback.xml
new file mode 100644
index 0000000..557a3ac
--- /dev/null
+++ b/backend/src/main/resources/logback.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<document>
+
+</document>
\ No newline at end of file