CalAmp LMU-300

CalAmp LMU-300 is a great GPS tracker to find stolen vehicles, optimize vehicle overhead, equip rented autos, etc. when an internal backup battery is required. It features a super-sensitive GPS technology on CDMA/GPRS, an optional internal 200 mAh or 1000 mAh backup battery, and 3-axis accelerometer.

Protocol: calamp Manufacturer: CalAmp Forum discussion
Properties
Device Information
device_info
Generic device information.
firmware_version: Firmware Version
Properties
AT Command
at
Send custom AT command to device
payload: Command to send, after AT
Query Current IP Address
{"payload":"$APP ADDR?"}
Query Current Output States
{"payload":"$APP OUTPUT?"}