asyncio_mqtt使用案例
时间: 2023-07-20 22:42:26 浏览: 62
以下是一个简单的 asyncio_mqtt 使用案例:
```python
import asyncio
from asyncio_mqtt import Client, MqttError
async def main():
client = Client("mqtt.eclipseprojects.io")
await client.connect()
print("Connected to MQTT broker")
# 订阅主题
await client.subscribe("my/test/topic")
# 发布消息
await client.publish("my/test/topic", "Hello, world!")
# 处理收到的消息
async with client.filtered_messages("my/test/topic") as messages:
async for message in messages:
print(f"Received message: {message.payload.decode()}")
await client.disconnect()
print("Disconnected from MQTT broker")
try:
asyncio.run(main())
except MqttError as error:
print(f"Error: {error}")
```
这个脚本连接到了一个名为 "mqtt.eclipseprojects.io" 的 MQTT 代理,并订阅了主题 "my/test/topic"。然后它发布了一条消息到该主题,并使用 `filtered_messages()` 方法处理从该主题接收到的所有消息。最后,它断开了与代理的连接。