PCF8574 library

Signal Input/Output

Most starred PCF8574 library for Arduino (standard and SAMD), Raspberry Pi Pico and rp2040 boards, ESP8266, smt32 and esp32
Most starred PCF8574 library. i2c digital expander for Arduino (standard and SAMD), esp32, Raspberry Pi Pico and rp2040 boards, SMT32 and ESP8266. Can read write digital values with only 2 wire. Very simple to use and encoder support.

Author: Renzo Mischianti

Maintainer: Renzo Mischianti

Read the documentation

Go to repository


This library is compatible with all architectures so you should be able to use it on all the Arduino boards.


To use this library, open the Library Manager in the Arduino IDE and install it from there.