1.【Note: Cab only use this firmware】 https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/tree/master/hardware/BTT SKR MINI E3 V1.2 2.【SKR MINI E3 V1.2 Manual】:https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3 3.【Notes on SKR mini E3 V1.2:】 https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/blob/master/hardware/BTT%20SKR%20MINI%20E3%20V1.2/The%20Notement%20of%20BTT%20SKR%20MINI%20E3%20V1.2.pdf