wifi.connect()

#Demo_01 ProductKey = ""#使用你自己的 ClientId = "1234|securemode=3,signmethod=hmacsha1|" DeviceName = "Demo_01" DeviceSecret = "**********************"#使用你自己的

strBroker = ProductKey + ".iot-as-mqtt.cn-shanghai.aliyuncs.com" Brokerport = 1883

user_name = "Demo_01&"#使用你自己的 user_password = "*************************************"#使用你自己的

print("clientid:",ClientId,"\n","Broker:",strBroker,"\n","User Name:",user_name,"\n","Password:",user_password,"\n")

def connect(): client = MQTTClient(client_id = ClientId,server= strBroker,port=Brokerport,user=user_name, password=user_password,keepalive=60) #please make sure keepalive value is not 0

client.connect()

temperature =25.00
while temperature < 30:
    temperature += 0.5      

    send_mseg = '{"params": {"IndoorTemperature": %s},"method": "thing.event.property.post"}' % (temperature)
    client.publish(topic="/sys/*************/Demo_01/thing/event/property/post", msg=send_mseg,qos=1, retain=False)#*號處為product id
    
    time.sleep(3)

while True:
    pass

#client.disconnect()
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try: import paho.mqtt.client as mqtt except ImportError: print("MQTT client not find. Please install as follow:") print("pip install paho-mqtt")

設定連線資訊

#Demo_02 ProductKey = "*********"#使用你自己的 ClientId = "2234" # 自定義clientId DeviceName = "Demo_02" DeviceSecret ="**********************************8"#使用你自己的

獲取時間戳（當前時間毫秒值）

us = math.modf(time.time())[0] ms = int(round(us * 1000)) timestamp = str(ms)

計算密碼（簽名值）

def calculation_sign(signmethod): data = "".join(("clientId", ClientId, "deviceName", DeviceName, "productKey", ProductKey, "timestamp", timestamp))

if "hmacsha1" == signmethod:
    # ret = hmac.new(bytes(DeviceSecret),
    #                bytes(data), hashlib.sha1).hexdigest()
    ret = hmac.new(bytes(DeviceSecret, encoding="utf-8"),
                   bytes(data, encoding="utf-8"),
                   hashlib.sha1).hexdigest()
elif "hmacmd5" == signmethod:
    # ret = hmac.new(bytes(DeviceSecret, encoding="utf-8"),
    #                bytes(data, encoding="utf-8"), hashlib.md5).hexdigest()
    ret = hmac.new(bytes(DeviceSecret, encoding="utf-8"),
                   bytes(data, encoding="utf-8"),
                   hashlib.md5).hexdigest()
else:
    raise ValueError
return ret
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======================================================

strBroker = ProductKey + ".iot-as-mqtt.cn-shanghai.aliyuncs.com" port = 1883

client_id = "".join((ClientId, "|securemode=3", ",signmethod=", "hmacsha1", ",timestamp=", timestamp, "|")) username = "".join((DeviceName, "&", ProductKey)) password = calculation_sign("hmacsha1")

print("="*60) print(strBroker) print("client_id:", client_id) print("username:", username) print("password:", password) print("="*60)

成功連線後的操作

def on_connect(client, userdata, flags, rc): print("OnConnetc, rc: " + str(rc))

成功釋出訊息的操作

def on_publish(client, msg, rc): if rc == 0: print("publish success, msg = " + msg)

成功訂閱訊息的操作

def on_subscribe(mqttc, obj, mid, granted_qos): print("Subscribed: " + str(mid) + " " + str(granted_qos))

def on_log(mqttc, obj, level, string): print("Log:" + string)

def on_message(mqttc, obj, msg): curtime = datetime.datetime.now() strcurtime = curtime.strftime("%Y-%m-%d %H:%M:%S") print(strcurtime + ": " + msg.topic + " " + str(msg.qos) + " " + str(msg.payload)) on_exec(str(msg.payload))

def on_exec(strcmd): print("Exec:", strcmd) strExec = strcmd

if name == 'main': mqttc = mqtt.Client(client_id) mqttc.username_pw_set(username, password) mqttc.on_message = on_message mqttc.on_connect = on_connect mqttc.on_publish = on_publish mqttc.on_subscribe = on_subscribe mqttc.on_log = on_log mqttc.connect(strBroker, port, 120) # mqttc.loop_start() time.sleep(1) temperature =27.55 mqttc.subscribe("/sys/************/Demo_02/thing/service/property/set", qos=1) # 換成自己的 #send_mseg = '{"pm_25": %s,"area":"%s","time":"%s"}' % (0, 0, datetime.datetime.now()) #send_mseg = '{"id": "1234", "version": "1.0","params": {"IndoorTemperature": %s},"method": "thing.event.property.post"}'%(temperature) send_mseg = '{"params": {"IndoorTemperature": %s},"method": "thing.event.property.post"}' % (temperature)

print('send_mseg is : ',send_mseg)

mqttc.loop_forever()
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