It’s not that unusual to have ADC offsets. Sometimes vendor code hides it (PSoC), sometimes it’s in full view of everyone (ESP32). Sometimes you just have to do something tricky like running ...

Keypad pin 1 to Arduino digital 3 //C2; Keypad pin 2 to Arduino digital 5 //R1; ... Although the code is an entry-level one, ... you have to fiddle the “rummy” keypad using your analog multimeter. It ...

Keypad Input: The code reads the input from a 4x4 keypad matrix. Keyboard Emulation: Based on the pressed key, the Arduino sends corresponding keystrokes to the computer. Keystroke Repetition: When a ...

Arduino code for a 2×3 programmable keypad. Contribute to degroof/programmable-keypad development by creating an account on GitHub.