TMCstepper - Arduino - TMC2209

[monkeyfist]

First check that you have UART connection available before doing anything else.

Try this example, and check that thread as it has way more information than this:

Using a TMC2209 silent stepper motor driver with an arduino

Here is a simple code to get TMC2209 working with basic functionalities. Meaning; current & microsteps without fiddling with jumpers or that pesky potentiometer. You only need one UART wire, just TX (PIN 17) to get it working. For receiving you need RX pin also, and i think a 1k ohm resistor between them (PIN 16). I dont have one, so i cant test it but the example tries to read the current microsteps to test the connection (it reads as 256 if the connection does not work). It also changes the c…