QMK firmware provided for PCB kits or keyboard kits sold by PandaKB.
Connect the MCU and the computer with a data cable. Double-click the reset button on the MCU or the keyboard PCB. The computer will show that a USB flash drive is inserted. Copy and paste the firmware into this USB flash drive. Flash the same firmware into both the left and right keyboards.
The firmware is based on Vial. Click to enter Vial Web. You can also download the Vial client.