Automatic location alarm function
A=0 turn off (Start vehicle, parking) SMS location reminder.
A = 1 (Start vehicle) SMS location reminder.
A = 2 (parking) SMS location reminder.
A = 3 (Start vehicle, parking) SMS location reminder.
(Vehicle start) Location SMS: Vehicle start
(Vehicle start) Push location message: After the vehicle starts in sleep mode, it detects vibration
for 10 seconds and sends (Vehicle start) location text messages.
(Parking) Location SMS: Vehicle off
(Vehicle stopped) Location message push: The vehicle stops for 5 minutes without vibration,
and 3-5 minutes after entering sleep mode, send (parking) location text messages.
4 working modes can be switched at will:（Let GPS devices last longer）
1. Instant mode = fast mode: WKMD, 1,30
(real-time tracking when using the device, upload data every 30 seconds, upload frequency is 30 seconds-120 seconds)
2. Super power saving mode = roll call mode: WKMD,2,0
(when not using the device, use this mode. Upload data through APP roll call function)
3. Power saving mode = exercise upload mode: WKMD, 3, 10
(data is uploaded once every 10 minutes of exercise, and can be changed from
10 minutes to 1440 minutes)
4. Timed upload mode=timed upload: WKMD,4,4
(the time range is between 1 hour and 24 hours, and the data is uploaded every 4 hours)