Hi Peter,
I am a highschool student trying to get TMC2209 with Arduino Uno R4 or Arduino giga but I am getting compilation errors for either HardwareSerial or SoftwareSerial. Can you confirm if your library works with Uno R4 or Giga architecture ? Why do I get error for HardwareSerial even though both R4 and Giga has hardware Serial ports. I would appreciate for your help.
Thanks,