4x4 Matrix Keypad
6 units will be available shortly.
There's a great Matrix Keypad Arduino library that should work great with this item with minor adjustments. It's basically a sturdier version of our Membrane 3x4 Matrix Keypad. Starting from the left there are four row pins, and then to the right are the four column pins.
If you dig our demo, check out the Adafruit FeatherWing OLED - 128x32 OLED
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