Stack up to 4 IO Pi boards on a single Raspberry Pi
Solder jumper selectable I2C addresses
External 5V Input with isolation solder jumper
Based on the MCP23017 from Microchip Technologies Inc
The 32 Channel Digital Expansion HAT for Raspberry Pi is a 32-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 to connect up to 32 digital inputs or outputs to the Raspberry Pi. The IO Pi Plus Expander is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow to stwack the IO Pi Plus along with other expansion boards.
some assembly required, but it's straightforward. Manufacturer support is excellent, prompt, and detailed.
R
Ramon
Great Product!
It is great to have the ability to expand the Raspberry pi GPIOs using this product.
M
Michael
You need lots of IO? come and get it!
After Enabling I2C and downloading a small library, you'll be up to your ears in IO. You'll probably need a header extension it's a tight fit on a PI3b+.
M
Marc
Nice way to add tons of GPIOs to a RPI, lacks interrupts
Used it to simplify encoder wiring. I wish they would provide options to route interrupts to select RPI pins via solder jumpers. Instead the INT signals are routed to the respective IO headers, which defeats the purpose
