在Python中,MQTT是一种轻量级的消息传输协议,用于在客户端和服务器之间传递消息。MQTT on_message超时是指在订阅MQTT主题时,如果超过一定时间没有收到消息,会触发超时机制。 MQTT on_message超时的设置可以通过设置超时时间来实现。超时时间是指在订阅主题后,等待接收消息的最长时间。如果超过这个时间仍然没有收到消息,...
MQTT客户端 下载paho-mqtt 要实现MQTT的客户端,就得在客户端上下载paho-mqtt库,我要在树莓派和Windows上进行通讯所以树莓派和Windows就都是客户端,两者都要下载(Windows既是客户端也是服务端),要注意python要是python3以上的版本,在命令行运行以下代码即可下载: pip install paho-mqtt (Windows) sudo pip3 install...
mqttc.on_message = on_message mqttc.on_connect = on_connect mqttc.on_publish = on_publish mqttc.on_subscribe = on_subscribe mqttc.on_log = on_log # 设置账号密码 # mqttc.username_pw_set(username, password=password) mqttc.connect(strBroker, port, 60) mqttc.subscribe(topic, 0) mqtt...
# The callback for when a PUBLISH message is received from the server. def on_message(client, userdata, msg): print(msg.topic+" "+str(msg.payload)) client = mqtt.Client("ADADWWRWFGWERWRWFGTERTER-PUB") client.username_pw_set("WeightUpdate-PUB", password="1qaz#EDC") client.on_connect...
client.on_message = on_message client.connect("127.0.0.1",1883,60) client.loop_forever() 发送消息 importtime import paho.mqtt.clientas mqtt def on_connect(client, userdata, flags, rc): print("Connected with result code "+str(rc)) ...
client= mqtt.Client(client_id)#ClientId不能重复,所以使用当前时间client.username_pw_set("dev","YTc4Mj")#必须设置,否则会返回「Connected with result code 4」client.on_connect =on_connect client.on_message=on_message log.info('开始连接mqtt'+ HOST +':'+str(PORT)) ...
def on_message(mqttc, obj, msg): curtime = datetime.datetime.now() strcurtime = curtime.strftime("%Y-%m-%d %H:%M:%S") print(strcurtime + ": " + msg.topic + " " + str(msg.qos) + " " + str(msg.payload)) on_exec(str(msg.payload)) ...
client.on_connect = on_connect client.on_message = on_message client.on_publish = on_publish client.on_unsubscribe = on_unsubscribe client.on_subscribe = on_subscribe client.on_disconnect = on_disconnect client.username_pw_set(username = auth_Info.mqttUsername, password = auth_Info.mqttPasswor...
print(f"Failed to send message to topic {topic}") msg_count += 1 订阅消息 编写消息回调函数on_message,该函数将在客户端从 MQTT Broker 收到消息后被调用,在该函数中我们将打印出订阅的 topic 名称以及接收到的消息内容。 def subscribe(client: mqtt_client): ...
def on_message(mqttc, obj, msg): curtime = datetime.datetime.now() strcurtime = curtime.strftime("%Y-%m-%d %H:%M:%S") print(strcurtime + ": " + msg.topic + " " + str(msg.qos) + " " + str(msg.payload)) on_exec(str(msg.payload)) ...