Queclink GV300L

Queclink GV300L is an advanced vehicle GPS tracker including an RS232 serial port. The device features a 250 mAh backup battery, digital and analog I/O, supports various accessories, such as a CAN adapter as well as temperature and humidity sensors, geofencing alarm, parking alarm, low power alarm, towing alarm, antenna disconnect alarm, alarm when the external GPS antenna is disconnected, driving behavior monitoring, aggressive driving behavior detection, including harsh braking, acceleration, etc., crash detection, and more.

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"}