diff --git a/.gitignore b/.gitignore
index 906b619..7dd2672 100644
--- a/.gitignore
+++ b/.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
\ No newline at end of file
+Thumbs.db
+
+# Node/npm (если есть frontend/mobile)
+node_modules/
+dist/
+
+# Python (если будет)
+__pycache__/
+*.pyc
\ No newline at end of file
diff --git a/backend/.gradle/9.3.0/checksums/checksums.lock b/backend/.gradle/9.3.0/checksums/checksums.lock
deleted file mode 100644
index 29c0f90..0000000
Binary files a/backend/.gradle/9.3.0/checksums/checksums.lock and /dev/null differ
diff --git a/backend/.gradle/9.3.0/executionHistory/executionHistory.lock b/backend/.gradle/9.3.0/executionHistory/executionHistory.lock
deleted file mode 100644
index a7e714d..0000000
Binary files a/backend/.gradle/9.3.0/executionHistory/executionHistory.lock and /dev/null differ
diff --git a/backend/.gradle/9.3.0/fileHashes/fileHashes.lock b/backend/.gradle/9.3.0/fileHashes/fileHashes.lock
deleted file mode 100644
index 9a1338e..0000000
Binary files a/backend/.gradle/9.3.0/fileHashes/fileHashes.lock and /dev/null differ
diff --git a/backend/.gradle/9.3.0/gc.properties b/backend/.gradle/9.3.0/gc.properties
deleted file mode 100644
index e69de29..0000000
diff --git a/backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock
deleted file mode 100644
index ebdd3e2..0000000
Binary files a/backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock and /dev/null differ
diff --git a/backend/.gradle/buildOutputCleanup/cache.properties b/backend/.gradle/buildOutputCleanup/cache.properties
deleted file mode 100644
index 072f68f..0000000
--- a/backend/.gradle/buildOutputCleanup/cache.properties
+++ /dev/null
@@ -1,2 +0,0 @@
-#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
deleted file mode 100644
index 6fcb255..0000000
Binary files a/backend/.gradle/file-system.probe and /dev/null differ
diff --git a/backend/.gradle/vcs-1/gc.properties b/backend/.gradle/vcs-1/gc.properties
deleted file mode 100644
index e69de29..0000000
diff --git a/backend/gradle/wrapper/gradle-wrapper.jar b/backend/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..61285a6
Binary files /dev/null and b/backend/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/protocol/.keep b/protocol/.keep
deleted file mode 100644
index e69de29..0000000
diff --git a/protocol/examples/command.json b/protocol/examples/command.json
new file mode 100644
index 0000000..8d8ad0f
--- /dev/null
+++ b/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
+    }
+  }
+}
\ No newline at end of file
diff --git a/protocol/examples/event.json b/protocol/examples/event.json
new file mode 100644
index 0000000..94d4836
--- /dev/null
+++ b/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"
+  }
+}
\ No newline at end of file
diff --git a/protocol/examples/response.json b/protocol/examples/response.json
new file mode 100644
index 0000000..9734d65
--- /dev/null
+++ b/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": {}
+  }
+}
\ No newline at end of file
diff --git a/protocol/examples/telemetry.json b/protocol/examples/telemetry.json
new file mode 100644
index 0000000..6dc45ae
--- /dev/null
+++ b/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
+  }
+}
\ No newline at end of file
diff --git a/protocol/schema.json b/protocol/schema.json
new file mode 100644
index 0000000..2446895
--- /dev/null
+++ b/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" }
+  }
+}
\ No newline at end of file