While searching for new products on AliExpress, I came across the SayoDevice OSU O3C, which looks very similar to other macro ...
The I2CKeyPad8x8 library implements the reading of a 8x8 keypad by means of a PCF8575. Smaller keypads, meaning less columns or rows (e.g. 5x4) can be read with it too. Sometimes you need to control ...
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