Commands¶
All commands start with 0xA1 or 0xA2, are encoded in Tag-Length-Value format (TLV), and end with an XOR checksum.
| Start byte | Tag (Command) | Length | Value (Data) | Checksum |
|---|---|---|---|---|
| 0xA1 / 0xA2 | 0x6C | 0x03 | 0x01 0x01 0x01 | 0xCF |
The checksum is calculated as XOR over all bytes with a start value of 0xAA.
SET_FCT_DIRECT¶
The SetFunctionDirect function allows individual functions to be switched on or off directly.
| Start byte | Tag (Command) | Length | Value (Data) | Checksum |
|---|---|---|---|---|
| 0xA1 | 0x6C | 0x03 | 0x01 0x03 0x01 | 0xCD |
Data format¶
| Byte 1 | Byte 2 | Byte 3 |
|---|---|---|
| Data object (e.g., basic functions) | Bit offset 1–40 (e.g., parking light, dipped beam) | On/Off (1 = On, 0 = Off) |
SET_PARAMETER¶
The SetParameter function allows script parameters for all outputs to be changed, e.g., "Set all high beam brightness values to 80%".
| Start byte | Tag (Command) | Length | Value (Data) | Checksum |
|---|---|---|---|---|
| 0xA1 | 0x76 | 0x02 | 0x04 0x50 | 0x81 |
SET_DATA¶
This function is used to periodically set all values – both proportional and digital functions.
| Start byte | Tag of data structure | Length | Value (Data) | Checksum |
|---|---|---|---|---|
| 0xA2 | Tag of data structure | 0x05 | 0x87 0x80 0x00 0x00 0x00 | 0xCF |
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