[嵌入式]使用python脚本测试mqtt协议接口

demo测试

订阅者 hbmqtt_sub --url mqtt://mqtt.eclipseprojects.io:1883 -t /geektime/iot

发布者 hbmqtt_pub --url mqtt://mqtt.eclipseprojects.io:1883 -t /geektime/iot -m Hello,World!

tips

• MQTT 消息采用二进制的编码格式，而不是 HTTP 协议那样的文本的表述方式。
• Client 在重复发送一个主题的消息时，可以从第二次开始，将主题名长度设置为 0，这样 Broker 会自动按照上次的主题来处理消息。这种情况对传感器设备来说十分常见，所以这个特性在工作中很有实际意义。3 种 QoS 级别：可靠通信
• Qos的三个级别
  

订阅者代码

import threading
import paho.mqtt.client as mqtt
import time

HOST = "xxxxx" #emq服务器地址
PORT = 1883

class Mqtt_subscribe(threading.Thread):
    """
    mqtt thread, 完成订阅功能
    """

    def __init__(self, subtopic):
        super(Mqtt_subscribe, self).__init__()
        self.client_id = time.strftime(
            '%Y%m%d%H%M%S', time.localtime(
                time.time()))
        self.client = mqtt.Client(self.client_id)
        self.client.user_data_set(subtopic)
        self.client.username_pw_set("admin", "public")
        self.message = None

    def run(self):
        # ClientId不能重复，所以使用当前时间
        # 必须设置，否则会返回「Connected with result code 4」
        self.client.on_connect = self.on_connect
        self.client.on_message = self.on_message
        self.client.connect(HOST, PORT, 60)
        self.client.loop_forever(timeout=60)

    def on_connect(self, client, subtopic, flags, rc):
        print("Connected with result code " + str(rc))
        print("topic:" + subtopic)
        client.subscribe(subtopic, 2)

    def on_message(self, client, userdata, msg):
        # print(msg.topic + " " + msg.payload.decode("utf-8"))
        self.mess_age = msg.payload.decode("utf-8")
        if 'test' in self.mess_age:   #根据订阅内容判断，如果含有想要的值则会停止订阅
            self.client.disconnect()
        return self.mess_age

if __name__ == "__main__":
    subtopic = "test"
    t = Mqtt_subscribe(subtopic)
    t.start()

发布者代码

import paho.mqtt.publish as publish
import time

def mqtt_Publish(topic,msg):
    client_id = time.strftime('%Y%m%d%H%M%S', time.localtime(time.time()))
    publish.single(topic,msg,qos=0,
                   hostname="xxxx", #emq地址
                   port=1883, 
                   client_id=client_id,
                   auth={'username': "admin", 'password': "public"}) #登录密码，官方是amdin,public

if __name__ == '__main__':
    topic = 'test'
    message = "this is a test"
    mqtt_Publish(topic,message)

参考