By using particular IO scanning detection, the 5 IO Keypad takes only 5 IOs to control all of the onboard push buttons and joystick. 10 push buttons, 1 joystick (five positions), 5-bit interface.
Applied to FEETECH Servo FR0109M FR0115M SCS09 SCS15. Include: FK-AP-19 (25T) -1PCS, FK-AP-20 -1PCS. Screws: M3*4 -8PCS, M3*6 -1PCS, TP1P 2 * 6 mm -8PCS.