Driver - TMC2208 driver & Marlin 1.1. 8 for V 1.1. 5 board while TMC2225 driver & Marlin 2.0. 1 for V 4.2. 7 board. Bootloader preinstalled on both version boards. Update Firmware - If the board you received is V 1.1. 5 please flash firmware with ISP cable. If the board you received is V 4.2. 7, please copy the firmware file to a formated SD card with no other files in it. Turn off the printer and unplug the power cord. Insert the SD card & power cord, and turn on the printer.
Wait 10s to complete the firmware updating process. Thermal runaway protection is enabled. The Board is Optimized by Circuit, effectively solve the Heating Problem. Any issues or questions about our product please feel free to contact us at any time. We have professional technical Team to provide technical supports for you as soon as we can.