IO Pi 32 Channel Port Expander for the Raspberry Pi

£20.39 each

Ex VAT: £16.99

65 in stock

Product Code: IOPI


The IO Pi is a 32 channel digital expansion board designed for use on the Raspberry Pi computer platform. The board is based around the MCP23017 16-bit I/O expander from Microchip Technology Inc. A pair of MCP23017 expanders are included on the board allowing you to
connect up to 32 digital inputs or outputs to the Raspberry Pi.  The IO Pi Expander is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the IO Pi along with other expansion boards.

The I2C address bits are selectable using the on-board jumpers. The MCP23017 supports up to 8 different I2C addresses so with two MCP23017 devices on each IO Pi you can stack up to 4 IO Pi boards on a single Raspberry Pi giving a maximum of 128 I/O ports.

The IO Pi includes a 5V port that can be isolated from the Raspberry Pi via an isolation jumper so you can use a seperate high current power supply to power the IO Pi reducing the load on the Raspberry Pi. Use of an external supply is recommended if you plan on connecting more than one IO Pi to your Raspberry Pi.

Additional Information:


IO Pi Address Configuration and Specification

Input Ratings & Specifications

Maximum input voltage: 5.5V when isolation jumper is removed

Maximum current on each IO pin 25mA

Maximum current on a single I/O Bank (1 MCP23017 device) 125mA


Click to download
Click to download schematic PDF.

Sample Code

The Quick2wire lib from allows easy access to the I2C port via Python.

Download demo code for the IO Pi.


Sorry there are not any current customer reviews for this item.

Write your own review

How do you rate this product?
  star rating star ratingstar rating star ratingstar ratingstar rating star ratingstar ratingstar ratingstar rating star ratingstar ratingstar ratingstar ratingstar rating
Build Quality
Ease of Use
   Review Title:
   Your Review:
  All fields are required.

Customers who bought this item also purchased...