其他：https://github.com/mqtt/mqtt.github.io/wiki/public_brokers
这些Broker/Server已经搭建好了，只需要编写Client/Subscriber就能测试一下MQTT了。
以使用Python的paho-mqtt来实现客户端。连接test.mosquitto.org服务为例。
（1）安装Eclipse Paho客户端
pip install paho-mqtt
（2）客户端连接
unencrypted-mqtt.py
# coding=utf8
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
client.subscribe("test/rensanning/time")
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("test.mosquitto.org", 1883)
client.loop_forever()
执行 python unencrypted-mqtt.py
（2）发布消息
pub-mqtt.py
# coding=utf8
import paho.mqtt.client as mqtt
import time
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("test.mosquitto.org", 1883)
while client.loop() == 0:
msg = "test message from Publisher "+time.ctime()
client.publish("test/rensanning/time", msg, 0, True)
print("message published")
time.sleep(1.5)
pass
执行 python pub-mqtt.py
（3）订阅消息
sub-mqtt.py
# coding=utf8
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
client.subscribe("test/rensanning/time")
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("test.mosquitto.org", 1883)
client.loop_forever()
执行 python sub-mqtt.py
同时运行订阅和发布客户端。
加密通信，访问8883端口
先从 http://test.mosquitto.org/ 下载 mosquitto.org.crt文件。
pub-mqtt-tls.py
# coding=utf8
import paho.mqtt.client as mqtt
import time
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.tls_set("mosquitto.org.crt")
client.connect("test.mosquitto.org", 8883)
while client.loop() == 0:
msg = "test message from Publisher "+time.ctime()
client.publish("test/rensanning/time", msg, 0, True)
print("message published")
time.sleep(1.5)
pass
执行 python pub-mqtt-tls.py
- mqtt.zip (2.5 KB)
- 下载次数: 3
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