“mid”变量是从相应的publish()调用返回的中间变量。这个回调很重要,因为即使publish()调用返回成功,也并不总是意味着消息已经被发送 on_subscribe(client, userdata, mid, granted_qos) 当Broker响应订阅请求时调用,“mid”变量是从相应的subscribe()调用返回的中间变量,“granted_qos”变量是每次发送不同订阅请求Qo...
client.connect(host=broker, port=port, keepalive=60) return client # 发布 def publish(client: MQTT, topic, msg, qos=0): def on_publish(client, userdata, mid): print(f"发布回调") print(client, userdata, mid) # if rc == 0: # print(f"Send `{msg}` to topic `{topic}`") # el...
on_publish(client, userdata, mid) 当一个信息被publish()发送给Broker 后,会调用on_publish()。对于QoS为1和2的消息(message),这意味着适当的握手都已经完成了。对于QoS为0的消息,这仅仅意味着消息离开了client。mid 变量匹配publish()返回的mid变量,使得出去的消息可以被追踪。 这个回调函数很重要,因为即使publ...
def on_connect(mqttc, obj, rc): print("OnConnetc, rc: " + str(rc)) def on_publish(mqttc, obj, mid): print("OnPublish, mid: " + str(mid)) def on_subscribe(mqttc, obj, mid, granted_qos): print("Subscribed: " + str(mid) + " " + str(granted_qos)) def on_log(mqttc...
on_message(client, userdata, message): 当收到关于客户订阅的主题的消息时调用。 message是一个描述所有消息参数的MQTTMessage。 (4)on_publish() 当使用使用publish()发送的消息已经传输到代理时被调用。 on_publish(client, userdata, mid): 对于Qos级别为1和2的消息,这意味着已经完成了与代理的握手。
importpaho.mqtt.clientasmqttdefon_publish(client,userdata,mid):print("message ID ",mid)client.disconnect()defon_connect(client,userdata,flags,rc):ifrc==0:client.publish("test",payload="hello world",qos=1)else:print("connection failed ",rc)mqtt_client=mqtt.Client(client_id="demo_...
def on_publish(mqttc, obj, mid): print("OnPublish, mid: "+str(mid)) def on_subscribe(mqttc, obj, mid, granted_qos): print("Subscribed: "+str(mid)+" "+str(granted_qos)) def on_log(mqttc, obj, level, string): print("Log:"+string) def on_message(mqttc, obj, msg): curti...
on_message(client, userdata, message): 当收到关于客户订阅的主题的消息时调用。 message是一个描述所有消息参数的MQTTMessage。 (4)on_publish() 当使用使用publish()发送的消息已经传输到代理时被调用。 on_publish(client, userdata, mid): 对于Qos级别为1和2的消息,这意味着已经完成了与代理的握手。
on_code_list[0]}") client.disconnect() #发布消息回调 def on_publish(client, userdata, mid, reason_code, properties): print("发布消息") print("On onPublish: qos = %d" % mid) #断开连接回调 def on_disconnect(client, userdata, rc, reason, properties): #CallbackAPIVersion.VERSION2 on_...
print("Connection failed") # 发布消息回调函数 def on_publish(client, userdata, mid): print...