Navtelecom SIGNAL S-2551 is a GPS/GLONASS monitoring unit, which has a CAN-interface with J1939 support. S-2551 has a built-in battery and also supports two SIM-cards, and microSD memory card up to 32 GB.
{"payload":"*?S"}
{"payload":"*!SETOUT 1Y,2N"}
{"payload":"*?V"}
{"line":1,"state":true}