The PCF8574_LH library provides a simple interface for controlling the PCF8574 I/O expander using the I2C communication protocol. It allows you to read and write values to the PCF8574's registers, ...
This supports my YouTube channel https://www.youtube.com/c/RalphBacon, and specifically video #49 PCF8574 Pin Extender. There are three sketches here, starting with ...
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