diff --git a/app/src/main/java/com/ouxuan/oxface/device/MqttManager.java b/app/src/main/java/com/ouxuan/oxface/device/MqttManager.java
index e9959ee..97843e8 100644
--- a/app/src/main/java/com/ouxuan/oxface/device/MqttManager.java
+++ b/app/src/main/java/com/ouxuan/oxface/device/MqttManager.java
@@ -54,9 +54,9 @@ public class MqttManager {
     private static final String PRODUCT_KEY = "qr3rximCZnT6ZU0NsAAiTC7O";
     
     // MQTT连接配置
-    private static final String BROKER_URL = null; // 传入null，使用腾讯云IoT默认地址
-    private static final int KEEP_ALIVE_INTERVAL = 120;
-    private static final int CONNECTION_TIMEOUT = 10;
+    private static final String BROKER_URL = "ssl://" + PRODUCT_ID + ".iotcloud.tencentdevices.com:8883"; // 腾讯云IoT Hub SSL地址
+    private static final int KEEP_ALIVE_INTERVAL = 240; // 增加心跳间隔
+    private static final int CONNECTION_TIMEOUT = 30; // 增加连接超时时间
     private static final int QOS = 1;
     
     // 重连配置
@@ -216,6 +216,9 @@ public class MqttManager {
      */
     private void connectMqtt() {
         LogManager.logInfo(TAG, "开始连接MQTT服务器...");
+        LogManager.logInfo(TAG, "连接地址: " + BROKER_URL);
+        LogManager.logInfo(TAG, "产品ID: " + PRODUCT_ID);
+        LogManager.logInfo(TAG, "设备名称: " + deviceName);
         isConnecting = true;
         
         try {
@@ -228,8 +231,8 @@ public class MqttManager {
                 DEV_PSK,
                 null, // devCert
                 null, // devPriv
-                false, // mqttLogFlag
-                null, // logCallBack
+                true, // 启用MQTT日志以便调试
+                new MqttLogCallback(), // 添加日志回调
                 new MqttActionCallback()
             );
             
@@ -238,9 +241,12 @@ public class MqttManager {
             options.setConnectionTimeout(CONNECTION_TIMEOUT);
             options.setKeepAliveInterval(KEEP_ALIVE_INTERVAL);
             options.setAutomaticReconnect(false); // 手动控制重连
-            options.setCleanSession(false);
+            options.setCleanSession(true); // 改为true，避免会话问题
+            options.setMqttVersion(MqttConnectOptions.MQTT_VERSION_3_1_1); // 明确指定MQTT版本
             
             LogManager.logInfo(TAG, "使用PSK认证连接腾讯云IoT平台");
+            LogManager.logInfo(TAG, "连接超时: " + CONNECTION_TIMEOUT + "秒");
+            LogManager.logInfo(TAG, "心跳间隔: " + KEEP_ALIVE_INTERVAL + "秒");
             
             // 连接MQTT
             MQTTRequest mqttRequest = new MQTTRequest("connect", requestID.getAndIncrement());
@@ -293,13 +299,16 @@ public class MqttManager {
     private void scheduleReconnect() {
         if (reconnectAttempts >= MAX_RECONNECT_ATTEMPTS) {
             LogManager.logError(TAG, "已达到最大重连次数，停止重连");
+            LogManager.logError(TAG, "请检查网络连接和腾讯云IoT设备配置");
             return;
         }
         
         reconnectAttempts++;
-        long delay = RECONNECT_DELAY * reconnectAttempts;
+        // 渐进式延迟：5s, 10s, 20s, 40s, 80s
+        long delay = RECONNECT_DELAY * (1L << (reconnectAttempts - 1));
         
         LogManager.logInfo(TAG, "调度第" + reconnectAttempts + "次重连，延迟" + delay + "ms");
+        LogManager.logInfo(TAG, "重连原因: 代理程序不可用，可能是网络问题或认证失败");
         
         if (connectionStatusListener != null) {
             mainHandler.post(() -> connectionStatusListener.onReconnecting(reconnectAttempts));
@@ -308,6 +317,14 @@ public class MqttManager {
         scheduledExecutor.schedule(() -> {
             if (!isConnected) {
                 LogManager.logInfo(TAG, "执行第" + reconnectAttempts + "次重连");
+                // 清理旧连接
+                if (mqttConnection != null) {
+                    try {
+                        mqttConnection = null;
+                    } catch (Exception e) {
+                        LogManager.logError(TAG, "清理旧连接失败", e);
+                    }
+                }
                 connectAsync();
             }
         }, delay, TimeUnit.MILLISECONDS);
@@ -345,6 +362,36 @@ public class MqttManager {
     }
     
     /**
+     * MQTT日志回调处理器
+     */
+    private class MqttLogCallback extends TXMqttLogCallBack {
+        @Override
+        public String setSecretKey() {
+            return null; // 不需要加密
+        }
+        
+        @Override
+        public void printDebug(String message) {
+            LogManager.logDebug("TXMQTT", message);
+        }
+        
+        @Override
+        public void printInfo(String message) {
+            LogManager.logInfo("TXMQTT", message);
+        }
+        
+        @Override
+        public void printWarn(String message) {
+            LogManager.logWarning("TXMQTT", message);
+        }
+        
+        @Override
+        public void printError(String message) {
+            LogManager.logError("TXMQTT", message);
+        }
+    }
+    
+    /**
      * MQTT动作回调处理器
      */
     private class MqttActionCallback extends TXMqttActionCallBack {
@@ -359,6 +406,10 @@ public class MqttManager {
                     status.name(), reconnect, userContextInfo, msg);
             LogManager.logInfo(TAG, "连接回调：" + logInfo);
             
+            if (cause != null) {
+                LogManager.logError(TAG, "连接异常信息", cause);
+            }
+            
             if (status.equals(Status.OK)) {
                 LogManager.logInfo(TAG, "MQTT连接成功");
                 isConnected = true;
@@ -376,12 +427,17 @@ public class MqttManager {
                     mainHandler.post(() -> connectionStatusListener.onConnected());
                 }
             } else {
-                LogManager.logError(TAG, "MQTT连接失败: " + msg);
+                String errorMsg = "连接失败: " + msg;
+                if (msg != null && msg.contains("代理程序不可用")) {
+                    errorMsg += "\n请检查:\n1. 网络连接是否正常\n2. 腾讯云IoT设备信息是否正确\n3. PSK密钥是否有效";
+                }
+                LogManager.logError(TAG, "MQTT" + errorMsg);
                 isConnecting = false;
                 
                 // 通知连接失败
                 if (connectionStatusListener != null) {
-                    mainHandler.post(() -> connectionStatusListener.onConnectionFailed(msg));
+                    final String finalErrorMsg = errorMsg;
+                    mainHandler.post(() -> connectionStatusListener.onConnectionFailed(finalErrorMsg));
                 }
                 
                 // 调度重连