jm_PCF8574

PCF8574 Arduino Library. PCF8574/PCF8574A - Remote 8-bit I/O expander for I2C-bus with interrupt. Example usage: The LCM2004A liquid crystal display module (HD44780U device) interfaced for I2C with a PCF8574. Device datasheet: https://www.nxp.com/docs/en/data-sheet/PCF8574_PCF8574A.pdf