MCP23008 - i2c 8 input/output port expander : ID 593 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Adding an MCP23017 16 port IO expander to Arduino or Esp8266 or Attiny85 or…….. – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
Amazon.com: Atlas Scientific 8:1 Serial Port Expander : Electronics
Interface MCP23017 (Port Expander) With Arduino Uno - YouTube
8:1 Serial Port Expander | Atlas Scientific
Using ESP01 adapter with Arduino Port Expander. Only RX/TX exposed. Can I change the pin definitions and use this? Trying to add esp home to my pool controller : r/Esphome
8:1 Serial Port Expander (RETIRED) – Whitebox Labs
How to Use Port Expanders on the Arduino - Circuit Basics
Arduino Port Expander — ESPHome
PCF8574 GPIO Extender - With Arduino and NodeMCU - Hackster.io
I2C Port Expander Board (Arduino code included!) from Celtic Engineering Solutions on Tindie
Tutorial: Maximising your Arduino's I/O ports with MCP23017 | tronixstuff.com
NANO I2C IO Expander - Hackster.io
I/O Expander Shield for pcDuino | LinkSprite Learning Center
Arduino Best expander Input/Output | GPIO Expansion module | MCP23017, MCP23S17 - YouTube
Arduino Compatible LCD I2C Port Expander Module | Jaycar Electronics New Zealand
PCF8574 I2C to 8-bit digital port expander
Amazon.com: Comimark 3Pcs PCF8574 PCF8574T I2C 8 Bit IO GPIO Expander Module for Arduino & Raspberry Pi : Electronics
SX1509 I/O Expander Breakout Hookup Guide - SparkFun Learn
Pcf8575 Io Expander Module I2c To 16io For Arduino - Replacement Parts - AliExpress
Using GPIO Expander MCP23017 With Arduino (Get up to 144 GPIOs) - Makerguides.com
Amazon.com: DKARDU 2 pcs PCF8575 IO Expander Board Module I2C to 16IO Module I/O Extension Shield Module 16 bit SMBus I/O Ports with Dupont Cable for Arduino UNO R3 : Electronics
GitHub - thebradleysanders/ESPHome-Arduino-Port-Expander: An Arduino Port Expander for ESPHome with added Arduino Mega 2560 support
i2c - Does an I²C IO Expander needs additional resistors for outputs? - Arduino Stack Exchange
CONNECTING MULTIPLE SENSORS TO ONE ARDUINO UNO SERIAL PORT : 4 Steps - Instructables
Read data from MCP23017 (Port Expander). - YouTube
64 I/O Expander Shield for max 1024 I/O - Other Hardware Development - Arduino Forum
