python连接ONENET程序

下面是基于Python的连接ONENET的程序示例：

import paho.mqtt.client as mqtt
import json

# ONENET平台的设备信息
product_id = "your_product_id"
device_id = "your_device_id"
auth_info = "your_auth_info"

# 连接ONENET平台的MQTT服务器
mqtt_client = mqtt.Client(client_id=device_id, clean_session=False, protocol=mqtt.MQTTv311)
mqtt_client.username_pw_set(product_id, auth_info)
mqtt_client.connect("183.111.174.141", port=1883, keepalive=60)

# 发布数据到ONENET平台
topic = "/products/" + product_id + "/devices/" + device_id + "/data"
payload_dict = {
    "temp": 25.0,
    "hum": 50.0
}
payload_json = json.dumps(payload_dict)
mqtt_client.publish(topic=topic, payload=payload_json, qos=0)

# 订阅ONENET平台的命令
topic = "/products/" + product_id + "/devices/" + device_id + "/commands/#"
mqtt_client.subscribe(topic=topic, qos=0)

# 处理ONENET平台的命令
def on_message(client, userdata, msg):
    topic = msg.topic
    payload_str = msg.payload.decode("utf-8")
    payload_dict = json.loads(payload_str)
    cmd_id = payload_dict["cmd_id"]
    cmd_body = payload_dict["cmd_body"]
    print("Received command: cmd_id={}, cmd_body={}".format(cmd_id, cmd_body))

mqtt_client.on_message = on_message
mqtt_client.loop_forever()

在这段代码中，我们使用了Paho MQTT客户端库来连接ONENET平台的MQTT服务器，以发布数据和订阅命令。我们首先需要设置ONENET平台的设备信息，然后连接ONENET平台的MQTT服务器，并通过调用`mqtt_client.publish()`方法发布数据。接下来，我们订阅ONENET平台的命令并设置一个回调函数`on_message()`来处理命令。最后，我们通过调用`mqtt_client.loop_forever()`方法来保持连接并持续接收消息。