Queclink GV600MG

Queclink GV600MG is an LTE rechargeable ruggedized trailer GPS tracker. The device features Global LTE Cat M1/NB1 connectivity with 2G fallback, BLE 4.2 support, 1-Wire interface, RS232 port, low power alarm, power on alarm, special alarm based on digital/analog input, geofencing, 5800 mAh battery, IP67-compliant casing, 

Protocol: queclink Manufacturer: Queclink Forum discussion
Properties
AT Command
at
Send custom AT command to device
cmd: Command to send, after AT+
payload: Command payload after password and up to count number: ',FFFF$' will be appended automatically by server
password: Device password
Activate digital outputs
{"cmd":"GTOUT","payload":"1,,,0,0,0,0,5,1,0,,1,1,,,","password":"gv300"}