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mLink 4x4 Matrix Keypad

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$4.53 $6.66 In stock

Category: Project Hardware

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.

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Customer Reviews (4.2 / 5 · 5 reviews)

Eli P. ★★★★★

Finally, a matrix keypad that doesn't require a million GPIO pins—the built-in I2C interface makes wiring a breeze. The tactile feedback on each key is satisfyingly clicky, perfect for my embedded project.

Samuel I. ★★★★★

Plugged it in and the I2C address detection was instant, no fiddling around. The built-in debouncing in the firmware means every keypress registers cleanly without the chatter you'd get building your own. Exactly what I needed for a clean panel mount project.

Hazel R. ★★★★☆

Wiring this up over I2C saved me a bunch of GPIO pins compared to scanning a raw matrix myself. The tactile keys have a decent click, though the panel mount tabs needed a little filing to sit flush in my enclosure.