Meitrack MD822S

Meitrack MD822S is a 8-channel 1080P MDVR device that can operate in vehicle tracking mode and video recording mode simultaneously. The device features 4G communication, video management via Wi-Fi, multiple audio inputs and outputs, H.264 video compression/ decompression, 2 SD cards, GPS positioning, 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"}