Signal Input/Output
Easy to use Arduino library for PCF8575 I2C expander.
Popular PCF8575 library by SkyWodd, made compliant with Arduino Library Manager by feanor-anglin
Maintainer: feanor-anglin
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.