云服务器搭建MQTT服务器的方法步骤

docker run -dit --name emqx -p 18083:18083 -p 1883:1883 -p 8083:8083 -p 8084:8084 emqx/emqx:latest
docker exec -it  emqx /bin/sh

http://你的云服务器公网IP:18083
账号： admin
密码: public

1883：MQTT 协议端口
8883：MQTT/SSL 端口
8083：MQTT/WebSocket 端口
8080：HTTP API 端口
18083：Dashboard 管理控制台端口

from paho.mqtt import client as mqtt_client
import random
import time
broker = '0.0.0.0'  #你的云服务器公网IP
port = 1883  #MQTT 协议端口
topic = "lmq"
#调用 Python random.randint 函数随机生成 MQTT 客户端 id
client_id = f'python-mqtt-{random.randint(0, 1000)}'
def connect_mqtt():
    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(client_id)
    client.on_connect = on_connect
    client.connect(broker, port)
    return client
def publish(client):
    msg_count = 0
    while True:
        time.sleep(1)
        msg = f"messages: {msg_count}"
        result = client.publish(topic, msg)
        # result: [0, 1]
        status = result[0]
        if status == 0:
            print(f"Send `{msg}` to topic `{topic}`")
        else:
            print(f"Failed to send message to topic {topic}")
        msg_count += 1
def run():
    client = connect_mqtt()
    client.loop_start()
    publish(client)
if __name__ == '__main__':
    run()

from paho.mqtt import client as mqtt_client
import random
broker = '0.0.0.0' #你的云服务器公网IP
port = 1883   #MQTT 协议端口
topic = "lmq"
# 调用 Python random.randint 函数随机生成 MQTT 客户端 id
client_id = f'python-mqtt-{random.randint(0, 1000)}'
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(client_id)
    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")
    client.subscribe(topic)
    client.on_message = on_message
def run():
    client = connect_mqtt()
    subscribe(client)
    client.loop_forever()
if __name__ == '__main__':
    run()