Python模拟MQTT v3.1.1服务器

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已于 2024-01-25 15:58:04 修改 · 2.9k 阅读

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#python #服务器 #java

于 2023-07-12 20:14:02 首次发布

文章描述了在使用hbmqtt和paho-mqtt库尝试建立MQTT服务器和客户端连接时遇到的问题。首先，因websockets版本过高导致导入错误，解决方法是降级websockets版本。接着，hbmqtt中缺少listeners配置项，解决方案是提供包含listeners的有效配置。最后，通过修改paho-mqtt客户端的连接方式解决了连接失败的问题。

示例代码

import logging
import asyncio
from hbmqtt.broker import Broker

# 设置日志级别为DEBUG
logging.basicConfig(level=logging.DEBUG)

# 创建MQTT服务器
broker = Broker()

# 启动MQTT服务器
async def start_broker():
    await broker.start()

# 停止MQTT服务器
async def stop_broker():
    await broker.stop()

# 主函数
async def main():
    # 启动MQTT服务器
    await start_broker()

    try:
        # 保持主程序运行
        while True:
            await asyncio.sleep(1)
    except KeyboardInterrupt:
        # 捕捉键盘中断信号
        pass

    # 停止MQTT服务器
    await stop_broker()

# 运行主程序
if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())

运行结果

"D:\Program Files (x86)\Python
310\python.exe" E:/文档/Projects/Pycharm/forklift/MQTT_SERVER.py
Traceback (most recent call last):
  File "E:\文档\Projects\Pycharm\forklift\MQTT_SERVER.py", line 10, in <module>
    from hbmqtt.broker import Broker
  File "D:\Program Files (x86)\Python310\lib\site-packages\hbmqtt\broker.py", line 15, in <module>
    from hbmqtt.session import Session
  File "D:\Program Files (x86)\Python310\lib\site-packages\hbmqtt\session.py", line 8, in <module>
    from hbmqtt.mqtt.publish import PublishPacket
  File "D:\Program Files (x86)\Python310\lib\site-packages\hbmqtt\mqtt\__init__.py", line 5, in <module>
    from hbmqtt.mqtt.packet import (
  File "D:\Program Files (x86)\Python310\lib\site-packages\hbmqtt\mqtt\packet.py", line 8, in <module>
    from hbmqtt.adapters import ReaderAdapter, WriterAdapter
  File "D:\Program Files (x86)\Python310\lib\site-packages\hbmqtt\adapters.py", line 6, in <module>
    from websockets.protocol import WebSocketCommonProtocol
ImportError: cannot import name 'WebSocketCommonProtocol'