Using CircuitPython on a Wemos S2 Mini with an inexpensive TJA1050 CAN Bus transceiver (eBay, Amazon, etc ) to read the gear selection on a 2012 Triumph Thunderbird
The CAN Bus message ID is 0x540
The selected gear is located in the first byte of the message data, using the binary value of bits 6 to 4
| Gear | Hex Range | Binary Range | Bits 6-4 |
|---|---|---|---|
| N | 0x00 - 0x0F | 00000000 - 00001111 | 000 |
| 1 | 0x10 - 0x1F | 00010000 - 00011111 | 001 |
| 2 | 0x20 - 0x2F | 00100000 - 00101111 | 010 |
| 3 | 0x30 - 0x3F | 00110000 - 00111111 | 011 |
| 4 | 0x40 - 0x4F | 01000000 - 01001111 | 100 |
| 5 | 0x50 - 0x5F | 01010000 - 01011111 | 101 |
| 6 | 0x60 - 0x6F | 01100000 - 01101111 | 110 |
An example of a message for 5th gear
ID: 0x540 Data: ('0x5C', '0x2C', '0x01', '0x00', '0x00', '0x00', '0x00')
The first byte shows 0x5C which is in the range of 0x50 to 0x5F
Credit to DickC on the triumph675.net forum