diff --git a/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt b/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt
index c799bf4..93f9f18 100644
--- a/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt
+++ b/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt
@@ -371,10 +371,27 @@ class BleManager private constructor(private val context: Context) {
 
                 val silenceMs = System.currentTimeMillis() - lastRxTimestamp
                 if (silenceMs > watchdogTimeoutMs) {
+                    // 직접 로그 기록 (handler 블로킹 무관)
+                    debugLogger.error("WATCHDOG_TIMEOUT silence=${silenceMs}ms — forcing reconnect")
+
+                    // GATT close는 어느 스레드에서든 호출 가능
+                    watchdogRunning = false
+                    try {
+                        bluetoothGatt?.disconnect()
+                        bluetoothGatt?.close()
+                    } catch (_: Exception) {}
+                    bluetoothGatt = null
+                    txCharacteristic = null
+                    rxCharacteristic = null
+
+                    // UI 업데이트 + reconnect는 메인 스레드
                     handler.post {
-                        logw { "Watchdog: no RX for ${silenceMs}ms — forcing disconnect + reconnect" }
-                        debugLogger.error("WATCHDOG_TIMEOUT silence=${silenceMs}ms — forcing reconnect")
-                        forceDisconnectAndReconnect()
+                        stopBatteryPolling()
+                        isConnected.value = false
+                        isServiceReady.value = false
+                        connectedDeviceName.value = ""
+                        onUnexpectedDisconnect?.invoke()
+                        scheduleAutoReconnect()
                     }
                     break
                 }