Send command to device

Hi,
I'm using a g108 GPS that uses jt808 protocol. I'm able to run it on HUABAO protocol port 5015.

1. Are there commands that are available for engine cutoff / resume for this device / protocol? I've looked through the documentation but wasn't able to find anything specific.
2. I have also tried to build my own command based on the documentation ( https://www.roadragon.com/uploads/JT808-protocol.pdf ) and am able to generate a message successfully 7E8500000A013670654390000101286375742C312C3029047E, and send to the device, but the device does not respond. I'm able to execute the same command using SMS and the engine gets cut. Any thoughts on how I can debug this using the Traccar code?

Hi, i'm still stuck on this.

Another user sent me this code 7E810500010190999999998D2564D87E, but is also useless.

This is my payload and a breakdown.

7E8300000AXXXXXXXXXXXX000001286375742C312C3129687E

Payload: 286375742C312C3129 (lock / cut engine power)

1. 7E - FLAG_BIT (static)
2. 8300 - Static Text
3. 000A - Length of Payload (step 6)
4. XXXXXXXXXXXX - Device Unique ID
5. 000001 - Sequence # (Do not change unless you are managing sequence #)
6. 286375742C312C3129 - Payload
7. 68 - Checksum (calculate checksum XOR all bytes from step 2 till step 6)
8. 7E - FLAG_BIT (static)

Did that work?

Yes. Generate your payload based on mine.