Innovate Motorsports OT-2 SDK - Manual (Page 61)

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Command ‘0’ – Send a 00h at 5 baud on the K line
Sent: 1 byte
{
U8 Cmd; // ‘0’
}
Responds:
1 byte
{
U8 Result; // always 1
}
Notes:
The description says it all. This command, combined with
the weird 15625 baud rate is nec. to communicate with an
ECU via MUT.
Command ‘L’ – Set the Vehicle LED State
Sent: 2 bytes
{
U8 Cmd; // ‘L’
U8 State; // 0 = off
// 1 = on
}
Responds:
1 byte
{
U8 Result; // Should match ‘State’ requested
}
Notes:
Because we have conditioned the user to expect the vehicle
light to light or blink, you might want to follow the same
model. You may also find this useful for debugging.