Restep A1
From iagent
Restep is an add-on board for Recore A6 which gives it an extra TMC2209 stepper driver. This is great if you want to build a 3D-printer with 7 motors, like the Voron 2.4.
Choosing address
If you only have one Restep board mounted on Recore, you do not have to alter it in any way. The default UART address will then be 3. If you want to add one more board, you can cut the lines on AD0 which will give the board address 2. Address 0 and 1 are reserved for stepper 4 and 5 which are mounted on the board on UART3(pins PD0/PD1).
Klipper Configuration
[tmc2209 stepper_x] uart_pin: ar100:PD1 tx_pin: ar100:PD0 uart_address: 3