flaskmqtt的简单介绍
简介
FlaskMQTT 是一个 Flask 扩展,用于在 Flask Web 应用程序中启用 MQTT(消息队列遥测传输)通信。它允许应用程序轻松地发布和订阅 MQTT 主题,从而实现与物联网(IoT)设备和其他 MQTT 客户端的通信。
安装
``` pip install Flask-MQTT ```
配置
在您的 Flask 应用中,使用以下代码配置 FlaskMQTT 扩展:```python from flask_mqtt import MQTTmqtt = MQTT() app.config['MQTT_BROKER_URL'] = 'mqtt://localhost:1883' app.config['MQTT_BROKER_PORT'] = 1883 mqtt.init_app(app) ```
使用
要发布消息,请使用 `mqtt.publish()` 方法:```python mqtt.publish('topic/name', 'payload') ```要订阅主题,请使用 `mqtt.subscribe()` 方法:```python @mqtt.on_message() def handle_message(client, userdata, message):print(message.payload.decode()) ```
示例
以下示例演示了如何使用 FlaskMQTT 发送和接收 MQTT 消息:
app.py
```python from flask import Flask from flask_mqtt import MQTTapp = Flask(__name__) mqtt = MQTT() app.config['MQTT_BROKER_URL'] = 'mqtt://localhost:1883' mqtt.init_app(app)@mqtt.on_message() def handle_message(client, userdata, message):print(message.payload.decode())@mqtt.on_connect() def handle_connect(client, userdata, flags, rc):mqtt.subscribe('topic/name')if __name__ == '__main__':app.run() ```
terminal
``` $ mosquitto_pub -t topic/name -m "Hello MQTT" ```
输出
``` Hello MQTT ```
**简介**FlaskMQTT 是一个 Flask 扩展,用于在 Flask Web 应用程序中启用 MQTT(消息队列遥测传输)通信。它允许应用程序轻松地发布和订阅 MQTT 主题,从而实现与物联网(IoT)设备和其他 MQTT 客户端的通信。**安装**``` pip install Flask-MQTT ```**配置**在您的 Flask 应用中,使用以下代码配置 FlaskMQTT 扩展:```python from flask_mqtt import MQTTmqtt = MQTT() app.config['MQTT_BROKER_URL'] = 'mqtt://localhost:1883' app.config['MQTT_BROKER_PORT'] = 1883 mqtt.init_app(app) ```**使用**要发布消息,请使用 `mqtt.publish()` 方法:```python mqtt.publish('topic/name', 'payload') ```要订阅主题,请使用 `mqtt.subscribe()` 方法:```python @mqtt.on_message() def handle_message(client, userdata, message):print(message.payload.decode()) ```**示例**以下示例演示了如何使用 FlaskMQTT 发送和接收 MQTT 消息:**app.py**```python from flask import Flask from flask_mqtt import MQTTapp = Flask(__name__) mqtt = MQTT() app.config['MQTT_BROKER_URL'] = 'mqtt://localhost:1883' mqtt.init_app(app)@mqtt.on_message() def handle_message(client, userdata, message):print(message.payload.decode())@mqtt.on_connect() def handle_connect(client, userdata, flags, rc):mqtt.subscribe('topic/name')if __name__ == '__main__':app.run() ```**terminal**``` $ mosquitto_pub -t topic/name -m "Hello MQTT" ```**输出**``` Hello MQTT ```