client.on_subscribe = on_subscribe client.on_message = on_message client.on_log = on_log# host为启动的broker地址 举例本机启动的ip 端口默认1883client.connect(host="127.0.0.1", port=1883, keepalive=6000)# 订阅频道time.sleep(1)# 多个主题采用此方式# client.subscribe([("demo", 0), ("tes...
void (*on_subscribe)(struct mosquitto *, void *userdata, int mid, int qos_count, const int *granted_qos); void (*on_unsubscribe)(struct mosquitto *, void *userdata, int mid); void (*on_log)(struct mosquitto *, void *userdata, int level, const char *str); //void (*on_error)()...
通过Client.subscribe(topic) , 会将订阅的 topic 下的所有消息接收 def subscribe(client): def on_message(client, userdata, msg): print(f"从 '{msg.topic}' 接收到的消息是 '{msg.payload.decode()}'") client.subscribe(topic) client.on_message = on_message 1. 2. 3. 4. 5. 完整代码 impor...
client.on_message = on_message client.on_publish = on_publish client.on_disconnect = on_disconnect client.on_unsubscribe = on_unsubscribe client.on_subscribe = on_subscribe client.connect('127.0.0.1', 1883, 600) # 600为keepalive的时间间隔 while True: client.publish(topic='mqtt11', payload=...
(1)on_connect() (2)on_disconnect() (3)on_message() (4)on_publish() (5)on_subscribe() (6)on_unsubscribe() (7)on_log() 一、Client模块 与MQTT代理(broker)进行通信的主要类。 (一)使用流程 使用connect()/connect_async()连接MQTT代理 ...
编写一个subscribe客户端:subscribe.py importpaho.mqtt.clientasmqttdefon_message(client,userdata,msg):print(msg.topic+" "+str(msg.payload))client=mqtt.Client()client.on_message=on_message client.connect('127.0.0.1',1883,600)topic=input('Enter the topic you want to subscribe: ')client.subscribe...
(client_id,protocol=protocol)self.myClient.on_connect=self.on_connectself.myClient.on_message=self.on_messageself.myClient.on_publish=self.on_publish# self.myClient.connect_async(mqtt_host, mqtt_port, mqtt_keepalive) # 异步数据发送self.myClient.connect(mqtt_host,mqtt_port,mqtt_keepalive)# ...
编写消息回调函数on_message,函数将在客户端从 MQTT Broker 收到消息后被调用,并打印出订阅的 topic 名称以及接收到的消息内容。 登录后复制def on_subscribe(): """订阅主题:mqtt/demo""" mqttClient = mqtt_connect(MQTT_SERVER_IP, MQTT_PORT)
OnPacketRead 当从客户端接收到数据包时调用。允许对数据包进行修改。 OnPacketEncode 在数据包被编码并发送给客户端之前立即调用。允许修改数据包。 OnPacketSent 在数据包已发送给客户端后调用。 OnPacketProcessed 在数据包已接收并成功由服务端处理后调用。 OnSubscribe 当客户端订阅一个或多个主题时调用。允许修改...
publish(topic, payload=None, qos=0, retain=False) 回调函数on_publish() SUBSCRIBE() subscribe(topic, qos=0) on_subscribe() UNSUBSCRIBE() unsubscribe(topic) 回调函数 ON_CONNECT() on_connect(client, userdata, flags, rc) ON_MESSAGE() on_message(client, userdata, message)...