Interface ESP32 with the PCF8575 I/O Port Expander

This post will show you how you can increase the number of GPIO port of your ESP32 using the I2C PCF8575 port expander module with the Arduino framework. WriteUp: https://www.donskytech.com/esp32-pcf8575-port-expander/ Code: https://github.com/donskytech/platformio-projects/tree/main/esp32-projects/esp32-pcf8575-port-expander Contents of the Video: 0:00 Intro 1:00 DonskyTech Plug 1:15 What is an I/O Port Expander and Why do we need one? 2:30 What is PCF8575? 4:34 What is I2C in PCF8575? 5:18 LED, Button, and PCF8575 - Wiring and Schematic 6:24 16 Channel Relay and PCF8575 - Wiring and Schematic 7:28 PCF8575 Arduino Library 8:14 Button switch handling in PCF8575 - ESP32 9:11 Demo - Button switch handling in PCF8575 - ESP32 9:49 LED Blink in PCF8575 - ESP32