发送端

import paho.mqtt.client as mqtt
import paho.mqtt.publish as publish
idx = 0
while True:
    print("send success")
    publish.single("junjietest",
    payload="this is message:%s"%idx,
    hostname="106.14.142.242",
    client_id="lora1",
    # qos = 0,
    # tls=tls,
    port=1883,
    protocol=mqtt.MQTTv311)
    idx += 1