******** ESP 32 ********
ESP pinout reference
https://randomnerdtutorials.com/esp32...
ESPDUINO pinout
https://www.botnroll.com/en/esp32/363...
ESP32 pull up/downs
https://docs.espressif.com/projects/e...
******** Arduino ********
Arduino UNO pinout
https://docs.arduino.cc/retired/board...
******** CNC shield ********
CNC shield pinout
https://forum.arduino.cc/t/usingcnc...
CNC shield schematics
https://osoyoo.com/2017/04/07/arduino...
******** TMC2209 ********
TMC driver reference voltage calculator
https://learn.watterott.com/silentste...
TMC2209 Datasheet
https://www.analog.com/media/en/techn...
TMC2209 silent stepstick pinout and jumpers
https://learn.watterott.com/silentste...
******** DRV8825 ********
DRV8825 Datasheet
https://www.ti.com/lit/ds/symlink/drv...
******** fluidnc ********
fluidnc github
https://github.com/bdring/FluidNC
fluidnc wiki
http://wiki.fluidnc.com/
my fluidnc config file
https://gitlab.com/pantiltslider/pa...
******** grblesp ********
grbl_esp32 github
https://github.com/bdring/Grbl_Esp32
******** Serial drivers ********
Serial driver tutorial
https://learn.sparkfun.com/tutorials/...