EMQX

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windows下进入bin目录

./emqx start

EMQX Dashboard localhost:10803 初始 -u admin -P public

mqtt客户端安装（tspi）

使用 Paho Python 连接到部署 | EMQX Platform 文档简介 - MQTTX 文档

使用源码安装

git clone https://github.com/eclipse/paho.mqtt.python 
cd paho.mqtt.python 
python3 setup.py install

使用python安装

pip3 install paho-mqtt

# python3.8

import random

from paho.mqtt import client as mqtt_client



broker = '192.168.31.33'
port = 1883
topic = "hello"
# generate client ID with pub prefix randomly
client_id = f'python-mqtt-{random.randint(0, 100)}'
username = 'admin'
password = 'public'


def connect_mqtt() -> mqtt_client:
    def on_connect(client, userdata, flags, rc):
        if rc == 0:
            print("Connected to MQTT Broker!")
        else:
            print("Failed to connect, return code %d\n", rc)

    client = mqtt_client.Client(mqtt_client.CallbackAPIVersion.VERSION1,client_id)
    # 此处CallbackAPIVersion.VERSION1 避免因paho.mqtt升级而不可用
    # client.tls_set(ca_certs='./server-ca.crt')
    client.username_pw_set(username, password)
    client.on_connect = on_connect
    client.connect(broker, port)
    return client


def subscribe(client: mqtt_client):
    def on_message(client, userdata, msg):
        print(f"Received `{msg.payload.decode()}` from `{msg.topic}` topic")
        if msg.payload.decode() == "1":
            command = f"echo {shlex.quote('heartbeat')} > /sys/class/leds/rgb-led-b/trigger"
            subprocess.run(["sh", "-c", command])

    client.subscribe(topic)
    client.on_message = on_message


def run():
    client = connect_mqtt()
    subscribe(client)
    client.loop_forever()


if __name__ == '__main__':
    run()