How To: Add More GPIO to ESP32/ESP8266

In today's video we are going to take a look at expanding/Increasing the GPIO that is available on a ESP32 by using a Cheap $2 pcf8575 I/O Expander to add a lot more sensors, this will also work for ESP8266 devices.

Code/article

00:00 Intro
00:55 pcf8575 I/O Expander overview
01:34 Important Addressing with I2c
04:27 EspHome code to scan devices
05:49 Wiring up the pcf8575 to esp 32
08:10 Scanning connected addresses
08:58 Code in ESPHome with sample sensor
11:52 Testing sensor code
13:13 adding a Relay Code
14:19 Wire up Relay and test
15:51 How to add more relays/sensors
17:15 Outro

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[benjamink]

What tool are you using to draw connections