The 128 GPIO board provide 128 channel digital expansion board designed for use on the Raspberry Pi.

 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 128 digital 

inputs or outputs to the Raspberry Pi. The 128 GPIO board is powered through the host Raspberry Pi 

using the GPIO port and extended pins on the GPIO connector allow you to stack the 128 GPIO along with other expansion boards.

   1. Provide 2x 20x2 40 pin same as Pi, one use 40pin GPIO cable connect to Pi

       one 20x2 40pin  for GPIO pin extra access.

   2. Provide extra i2c pin and spi pin for easy connect device

   3. Provide 128 GPIO status blue LED

4  Provide each 23017 Address select A0,A1,A2

   can rearrange 23017 location by your order

5. U2 ,U3 ,U4, U5 ,U6 ,U7,U8 ,U9  23017 Port A,B

6. Each GPIO pin out 2X10 ,

    Bank B(1-10) GPIO (0,1,2,3,4,5,6,7,GND, INTB)

    Bank A(1-10) GPIO (0,1,2,3,4,5,6,7,GND, INTA)

Download sample program

led-21.py led-22.py 23017-21.py 23017-22.py

23017-8port-s-v103.py       *** 23017 Datasheet

Download    User Manual