device information for AliCloud. OK AT+QMTOPEN=? +QMTOPEN: <tcpconnectID>,<host_name>,<port> OK AT+QMTOPEN=0,"iot-as-mqtt.cn-shanghai.aliyuncs.com",1883 //Open a network for MQTT client. OK +QMTOPEN: 0,0 //Opened the MQTT client network successfully. AT+QMTOPEN? +QMTOPEN: 0,"iot-as-mqtt.cn-shanghai.aliyuncs.com",1883 OK