Setting up TMC2209 in UART mode on MRR ESPA (Marlin 2.0 + ESP3D on ESP32)

Due to a lack of pins, the MRR ESPA (ESP32-based 3D printer control board) is unable to support TMC2208 stepper drivers in UART mode. However, one feature of the newer TMC2209 stepper driver is the ability to set slave addresses and share the same serial port with up to 4 drivers. This video shows how to do this on the MRR ESPA. While not shown, the process is similar for the MRR ESPE, which is also based on the ESP32. The MRR ESPA and MRR ESPE are 3D printer control boards that use the ESP32, which is a microcontroller with Wi-Fi. On Marlin 2.0, it can be used with the ESP3D web interface to allow 3D printers to be controlled with any web browser. #3dprinting Project pages: Audio used in this video comes from YouTube&audio library.