Using the MCP23017 port expander with WiringPi2 to give you 16 new GPIO ports – part 3 – RasPi.TV
Python & CircuitPython | Using MCP23008 & MCP23017 with CircuitPython | Adafruit Learning System
Raspberry Pi I2C 4×4 matrix keypad with MCP23017 and Python | Mikronauts.com
MCP23017 Port Expanders | 8BitCoder
How To Use A MCP23017 I2C Port Expander With The Raspberry Pi - Part 1 - Raspberry Pi Spy
Raspberry Pi to Z80 interface - Hackster.io
Amazon.com: CQRobot Ocean: MCP23017 IO Expansion Board Compatible with Raspberry Pi/Micro:bit/Arduino/STM32 Motherboard. I2C Interface, Expands 16 I/O Pins, Up to 8 Expansion Boards Can be Used Simultaneously. : Electronics
How to connect the MCP23017 GPIO Expander to an Arduino and Raspberry Pi - YouTube
Raspberry Pi I2C 4×4 matrix keypad with MCP23017 and Python | Mikronauts.com
How to use the MCP23017 Port Expander | The Pi Hut
Buy IO Pi Plus MCP23017 - expander for Raspberry Botland - Robotic Shop
How to Use Port Expanders on the Arduino - Circuit Basics
Python & CircuitPython | Using MCP23008 & MCP23017 with CircuitPython | Adafruit Learning System
MCP230xx IO Expander | Character LCD with Raspberry Pi or BeagleBone Black | Adafruit Learning System
32 Channel Digital Expansion HAT for Raspberry Pi - RobotShop
four mcp23017 on a raspberry pi zero is possible? - Raspberry Pi Forums
Add Digital I/O Pins to Raspberry Pi Hardware Using MCP23017 - MATLAB & Simulink Example
Adding Digital I/O To Your CircuitPython Compatible Board: Part 3 - The MCP23017 - Woolsey Workshop
Raspberry Pi I2C 4×4 matrix keypad with MCP23017 and Python | Mikronauts.com