Category: Digital I/O expander

PCF8574 i2c digital I/O expander - Basic I/O and interrupt 74

PCF8574 i2c digital I/O expander: Arduino, esp8266 and esp32, basic I/O and interrupt – Part 1

Library to use i2c pcf8574 IC with arduino and esp8266.

This IC can control (until 8) digital devices like button or led with 2 only pins.

Can read and write digital value with only 2 wire (perfect for ESP-01).

I try to simplify the use of this IC, with a minimal set of operation.