import mqtt import PikaStdDevice client = mqtt.MQTT('broker.emqx.io',port=1883,clinetID='clientid',username='name_',password='passwd_') ret = client.connect() print("ret:%d" % ret) def callback0(signal): print("py cb: %s:%s" % (client.recv_topic, client.recv_msg)) ret = client.subscribe('topic_pikapy_qos0', 0, callback0) print("ret:%d" % ret) ret = client.subscribe('topic_pikapy_qos1', 1,0) print("ret:%d" % ret) ret = client.subscribe('topic_pikapy_qos2', 2,0) print("ret:%d" % ret) #sleep wait for recv data T = PikaStdDevice.Time() T.sleep_s(5) out = client.listSubscribrTopic() print('out',out) client.unsubscribe('topic_pikapy_qos0'); client.unsubscribe('topic_pikapy_qos1'); client.unsubscribe('topic_pikapy_qos2'); T.sleep_s(5) client.listSubscribrTopic() T.sleep_s(10) ret = client.disconnect() print("ret:%d" % ret)