Hobby Components mLink 4x4 Matrix Keypad

The mLink 4x4 matrix keypad is a panel mountable serial (I2C/IIC) 16 key tactile keypad. On the rear of the keypad is mounted a mLink module which continuously scans the keypad (with automatic debouncing) for any key presses. If a key is pressed the module stores the key as an 8 bit ASCII value which can then be read out of its serial interface. It is compatible with other mLink or standard I2C modules allowing you to daisy-chain several different types of modules together using only the two I2C pins of your microcontroller. For Arduino users you can use the mLink library (see below) to control any type of mLink module. Only one single instance of the library is needed to control multiple types of mLink modules resulting in very little resources overhead and therefore making it great for Arduinos with small amounts of memory and pin counts. Example Arduino Sketch and documentation available on our support forum.