Arduino / Digital I/O expander / esp32 / esp8266 / i2c / Library / pcf8574 / Rotary encoder

PCF8574 i2c digital I/O expander: Arduino, esp8266 and esp32, rotary encoder – Part 2

Library to use i2c pcf8574 IC with arduino, esp8266 and esp32.

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

Here I explain the manage of multiple rotary encoder.