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@@ -0,0 +1,37 @@
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+import paho.mqtt.client as mqtt
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+import json
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+
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+
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+class EstimationWeightUpdate(object):
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+
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+ def __init__(self):
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+ self.init_mqtt()
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+
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+
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+ # The callback for when the client receives a CONNACK response from the server.
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+ def on_connect(self, client, userdata, flags, rc):
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+ print("Connected with result code "+str(rc)) #rc的值很重要,为0代表连接成功。
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+
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+ # Subscribing in on_connect() means that if we lose the connection and
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+ # reconnect then subscriptions will be renewed.
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+ self.client.subscribe("$SYS/#") #订阅$SYS/下的所有主题
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+
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+ # The callback for when a PUBLISH message is received from the server.
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+ def on_message(self, client, userdata, msg):
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+ print(msg.topic+" "+str(msg.payload))
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+
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+ def init_mqtt(self):
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+ self.client = mqtt.Client("ADADWWRWFGWERWRWFGTERTER-SUB")
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+ self.client.username_pw_set("admin", password="longruan123")
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+ self.client.on_connect = self.on_connect #连接broker时broker响应的回调
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+ self.client.on_message = self.on_message #接收到订阅消息时的回调
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+
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+
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+ def subscribe_update_topic(self):
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+ self.client.connect("10.71.146.182", 1883, 60) #连接到broker
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+ self.client.subscribe("1/1/2", 0)
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+ self.client.loop_forever()
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+
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+if __name__ == "__main__":
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+ ew = EstimationWeightUpdate()
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+ ew.subscribe_update_topic()
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