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This is a modified Marlin 2.1.X for Ender 3 with 4.2.2 board. Upgrade with unfied bed leveling, increase temperature toward 300, bltouch(using cr-touch),with custom bootimage
Customised firmware to work with my Ender 3, SKR 1.4 Turbo, BLTouch 3.1 & BigTreeTech TFT35 v2
Marlin Configurations - SKR Mini E3 V1.2
The version of Marlin 1.1.x-bugfix flashed on my Ender 3 Pro (1.1.4) with BLTouch 3.1