mqtt訂閱和釋出

import paho.mqtt.client as mqtt
import time
MQTTHOST = "192.168.0.4"
MQTTPORT = 1883
mqttClient = mqtt.Client()


# 連線MQTT伺服器
def on_mqtt_connect():
mqttClient.connect(MQTTHOST, MQTTPORT, 60)
mqttClient.loop_start()


# publish 訊息
def on_publish(topic, payload, qos):
mqttClient.publish(topic, payload, qos)

# 訊息處理函式
def on_message_come(lient, userdata, msg):

print(msg.topic + " " + ":" + str(msg.payload))


# subscribe 訊息
def on_subscribe():
mqttClient.subscribe("/dev/sub", 1)
mqttClient.on_message = on_message_come # 訊息到來處理函式


def main():
on_mqtt_connect()

while True:
on_publish("/dev/FringeState", "Hello Pythonkkk!", 1)
on_subscribe()
time.sleep(1)



if __name__ == '__main__':
main()