If you’ve scavenged some random keypads and want to reuse them in a project without the hassle of figuring out the pinouts, then [Cliff Biffle] has an interface module for you.The Keypad Go ...

Run these from the Arduino IDE. /src - Source files for the library (.cpp, .h). /firmware/Hex_Keypad_I2C - Source files for the Arduino firmware (.ino). /docs - Pinout digram for the Sparfkun 16 ...

Keypads are very handy input devices. And there are many great libraries written to interface to keypads! Using this firmware that scans the keys and an 3.3v 8MHz Arduino Pro-Mini, it's easy to create ...

Whenever a key is pressed in keypad module the Arduino Uno detects it and shoes the corresponding key on 16x2 LCD. [Also check: Keypad Interfacing with 8051 Microcontroller] Components Required.