Howto add a 4×4 keypad to a Raspberry Pi with an MCP23017 and Python
January 27th, 2015Touch screens are great. Keyboards are often necessary. But what if all you need is a numeric keypad?
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In my latest article, I show you how you can easily add a 4×4 keypad to your Raspberry Pi using an MCP23017 I/O expander and Python.
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I also present a very easy to use Python library to read the keypad.
https://www.mikronauts.com/raspberry-pi/raspberry-pi-i2c-4×4-matrix-keypad-with-mcp23017-and-python/
