diff --git a/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled.ino b/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled.ino
index 0400feb..a9a8eaf 100644
--- a/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled.ino
+++ b/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled/wifi-mqtt-esp8266-oled.ino
@@ -27,7 +27,7 @@ const char* host = "192.168.3.26:8873";
 
 // MQTT代理
 const char *mqtt_broker = "47.242.184.139";
-const char *topic = "/device/esp8266/001";
+const char *topic = "/device/esp8266/004";
 const char *mqtt_username = "admin";
 const char *mqtt_password = "publish452131wW452131wW$";
 const int mqtt_port = 1883;
@@ -68,7 +68,7 @@ void setup() {
   //mqtt init
   //连接到mqtt代理
   client.setServer(mqtt_broker, mqtt_port);
-  //client.setCallback(callback);
+  client.setCallback(callback);
   while (!client.connected()) {
       String client_id = "esp8266-client-";
       client_id += String(WiFi.macAddress());
@@ -82,8 +82,8 @@ void setup() {
       }
   }
   // 发布和订阅
-  //client.publish(topic, "hello emqx");
-  //client.subscribe(topic);
+  // client.publish(topic, "hello emqx");
+  client.subscribe(topic);
 
   /* 2. oled屏幕初始化 */
   oled.init();