I'm trying to set up the MCP23017 I2C 16 port expander to capture presses on a 4x3 membrane keypad. However, I'm a bit lost as to how to physically hook these items together and also a bit confused as to how I would implement the code. I currently have the GPIOB side of the MCP23017 mapped as input…

Is it possible to use MCP23017 I2C 16 port expander and 4x3 keypad?

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