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52 lines
1.5 KiB
52 lines
1.5 KiB
# -*- coding: utf-8 -*-# -*- coding: utf-8 -*-
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# 订阅者
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import paho.mqtt.client as mqtt
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broker = '121.40.129.71'
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# 连接成功回调
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def on_connect(client, userdata, flags, rc,properties):
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if rc.is_failure:
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print(f"连接失败: {rc}. loop_forever()将重新连接")
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else:
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print(f'连接成功: {rc}')
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client.subscribe('host_status/#')
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def on_subscribe(client, userdata, mid, reason_code_list, properties): # 订阅回调
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if reason_code_list[0].is_failure:
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print(f'订阅失败: {reason_code_list[0]}')
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else:
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print(f'订阅成功: {reason_code_list[0].value}')
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def on_unsubscribe(client, userdata, mid, reason_code_list, properties): # 取消订阅回调
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if len(reason_code_list) == 0 or not reason_code_list[0].is_failure:
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print("取消订阅成功(if SUBACK is received in MQTTv3 it success)")
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else:
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print(f"取消订阅失败: {reason_code_list[0]}")
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client.disconnect() # 断开连接
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# 消息接收回调
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def on_message(client, userdata, msg):
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print(msg.topic+" "+str(msg.payload))
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mqtt = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2, client_id="book_1")
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mqtt.on_connect = on_connect
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mqtt.on_message = on_message
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mqtt.on_subscribe = on_subscribe
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mqtt.on_unsubscribe = on_unsubscribe
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mqtt.is_connected()
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mqtt.user_data_set(["user_data", "book_1"])
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mqtt.connect(broker, 48835, 60)
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mqtt.loop_forever()
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print(f"收到以下消息: {mqtt.user_data_get()}")
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# while True:
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# rc = mqtt.loop(timeout=1.0)
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# print(11)
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# if rc != 0:
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# mqtt.reconnect()
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