Meitrack MVT400

Meitrack MVT400 is a vehicle GPS tracker suitable for heavy machinery equipment and construction machines. The device features SMS and GPRS TCP/UDP communication, built-in motion sensor for power saving, built-in backup battery, SOS panic button, movement alarm, geo-fencing control, low battery alarm, speeding alarm, 2 digital inputs, 7 analog inputs, 1 OC outputs, 1 relay output, 1 optional RS232 output, IP66 water-resistant casing, and more.

Protocol: meitrack Manufacturer: Meitrack Forum discussion
Properties
Custom GPRS command
custom_gprs
Send custom command to device via GPRS connection
parameters: Comma-separated parameters (optional)
command_type: 3 symbols command code
Real-Time Location Query via GPRS connection
{"command_type":"A10"}
Setting a Heartbeat Packet Reporting Interval to 10 minutes via GPRS connection
{"parameters":"10","command_type":"A11"}
Custom SMS command
custom_sms
Send custom command to device via SMS
password: 4 digit device password. Default is 0000
parameters: Comma-separated parameters (optional)
command_type: 3 symbols command code
Setting the Scheduled Tracking to 10 seconds via SMS with PIN=1234
{"password":"1234","parameters":"10","command_type":"A12"}