Arduino I2C Port Expander

#145 Arduino C++ MCP23017 I2C Port Expander CJMCU-2317 Module

Arduino C++ tutorial on how to use the MCP23017 I2C Port expander using the CJMCU-2317 Module. The tutorial shows how to send outputs to pins as well as read inputs from the pins wihtout usng a library. The sketches work through the process of building up some functions so that in the final sketch you can process the inputs from individual pins ...

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