fix 6.2 tcp

app/src/main/java/com/ouxuan/oxface/device/MqttManager.java

@@ -55,8 +55,8 @@ public class MqttManager {
     private static final String PRODUCT_KEY = "qr3rximCZnT6ZU0NsAAiTC7O"; // 动态注册用的ProductKey
 
     // MQTT连接配置 - 根据腾讯云IoT官方文档配置
-    // MQTTS(8883): ${productid}.iotcloud.tencentdevices.com
-    private static final String BROKER_URL = "ssl://" + PRODUCT_ID + ".iotcloud.tencentdevices.com:8883"; // 腾讯云IoT Hub SSL地址
+    // MQTT(1883): ${productid}.iotcloud.tencentdevices.com - 使用TCP连接避免SSL证书问题
+    private static final String BROKER_URL = "tcp://" + PRODUCT_ID + ".iotcloud.tencentdevices.com:1883"; // 腾讯云IoT Hub TCP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;