32 Ch IO Expander Module

This 32-bit I/O Expander Module is based on the proven Microchip MCP23S17 (SPI) and MCP23017 (I²C) ICs, offering a flexible solution for projects that require additional input/output pins. Whether you prefer SPI or I²C communication, this module gives you the freedom to choose, making it suitable for a wide range of embedded applications.

? Key Features

32 Digital I/O Channels – Configurable as input or output

Dual Protocol Support – SPI (MCP23S17) or I²C (MCP23017)

Interrupt-on-Change Functionality for event-driven designs

Operating Voltage: 3.3 to 5.5V

Compact PCB with Easy Pinout for prototyping or integration

Stackable Addressing – Multiple expanders can be used on the same bus

? Applications

Industrial automation and control systems

Robotics and motor control

Home automation and smart devices

Keypad scanning and switch expansion

LED control and display interfaces

Sensor data acquisition

? Why Choose This Module?

If your microcontroller, Arduino, ESP32, Raspberry Pi, or STM32 project needs more GPIOs, this expander is the perfect solution. With plug-and-play flexibility, it saves PCB space and simplifies wiring while providing reliable high-speed communication.

✅ In stock and ready to ship!
Order now and enhance your project with 32 extra GPIOs in one compact module.