We recommend that you check the instructions before purchasing:Https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3?spm=a2g0o.detail.1000023.20.22b67ce5URWusv.If there is any quality problem with the product, please contact the customer service team by message and we will try our best to help you
ARM Cortex-M3 Series STM32F103RCT6 Master Controller with 32-bit Main Frequency of 72MHz Chip;
Supporting display :2.8 inch, 3.5 inch color touch screen and Ender3 printer LCD12864 screen;
Support BLtouch, RGB color lamp, block detection, shutdown and other functions;
Integrate UART mode of TMC2209 to simplify debugging of motherboard and driver.Reserve expansion ports for TMC2209 pins to facilitate users to use DIAG instead of Endstop.