Mielta M3

Mielta M3 is a universal GPS tracking device with rich connectivity options: 1-Wire, RS232, RS485, USB 2.0, Bluetooth working over Wialon Combine protocol. The device features a black box for 30,000 points, built-in accelerometer, digital and analog I/O, and optional Li-Pol battery.

Protocol: wialon-combine Manufacturer: Mielta Forum discussion
Properties
Custom command
custom
Send custom command to device
hex: Payload is encoded as HEX string
payload: Text or hex data to send
Send string 1234
{"payload":"1234"}
Send string 1234 in hex
{"hex":true,"payload":"31323334"}