This printer main board is loaded with everything you need for a 3D printer. Lots of inputs/outputs and the suppurt from Biqu/Bigtree Tech is incredible. Check out their Github site here: https://github.com/bigtreetech/SKR3 . You will find firmware, manuals and everything related to this main board.

Check out my new 3D Printing podcast http://www.perfectfirstlayer.com
With my co hosts:
JJ    / @jjshankles  
Nathan    / @nathanbuildsrobots  

Purchase BTT SKR 3 and Stepper Drivers (Affiliate Links)
BTT SKR 3 https://amzn.to/3HlkgZk
BTT TMC2209 Stepper Drivers https://amzn.to/3UMbExO
BTT Pi4B https://amzn.to/3FEc314
BTT CB1 https://amzn.to/3PgmtqJ