MQTT協議 Python客戶端

【本文出處: http://blog.csdn.net/leytton/article/details/52782523】

1、安裝模塊

paho.mqtt.python開源地址：https://github.com/eclipse/paho.mqtt.python

下載並解壓，打開目錄執行命令安裝模塊

python setup.py install

2、Python代碼

#-*-coding:utf-8-*- 
import paho.mqtt.client as mqtt  
  
# 當連接上服務器后回調此函數  
def on_connect(client, userdata, flags, rc):  
    print("Connected with result code "+str(rc))  
  
    # 放在on_connect函數里意味着  
    # 重新連接時訂閱主題將會被更新  
    client.subscribe("topic/sub")  
  
# 從服務器接受到消息后回調此函數  
def on_message(client, userdata, msg):  
    print("主題:"+msg.topic+" 消息:"+str(msg.payload))  
  
client = mqtt.Client()  
#參數有 Client(client_id="", clean_session=True, userdata=None, protocol=MQTTv311, transport="tcp")  
client.on_connect = on_connect #設置連接上服務器回調函數  
client.on_message = on_message  #設置接收到服務器消息回調函數  
client.connect("iot.eclipse.org", 1883, 60)  #連接服務器,端口為1883,維持心跳為60秒  
client.loop_forever()  

3、其他接口

client.disconnect() #斷開連接
client.publish(topic, payload=None, qos=0, retain=False) #發布消息
def on_disconnect(client, userdata, rc):    
	if rc != 0:
		print("Unexpected disconnection.")
mqttc.on_disconnect = on_disconnect ##設置與服務器斷開連接回調函數
def on_publish(client, userdata, mid): #發布消息完成回調函數
...

4、參考文獻

paho.mqtt.python開源地址：https://github.com/eclipse/paho.mqtt.python

附各客戶端項目地址:http://www.eclipse.org/paho/downloads.php 

地址2 https://github.com/mqtt/mqtt.github.io/wiki/libraries