GPIO schematic and dimension documentation  

RE: GPIO schematic and dimension documentation

The GPIO board is not any magic. It's just a breakout board generally with an I2C to GPIO expander chip.
Most information is here: https://help.prusa3d.com/article/gpio-module_734695

Regarding the size: I have aready seen some cases for the GPIO board on printables
https://www.printables.com/model/998147-prusa-gpio-hackerboard-case  
https://www.printables.com/model/1016997-prusa-gpio-hackerboard-cover
So this could give you some measurements for the board.
I expect that the schematics will be release later as the current board states 2024-08-20. (Maybe there will be slight changes in the future).

I think the main chip of this board is something like a PCF8574 from Texas Instruments. At least is look like it, but this is my guess!
So no magic at all. But you need the Firmware 6.2.0-apha2 (or newer) for addressing the board (with G-Codes). 

RE: GPIO schematic and dimension documentation

Hi,

the board is on my desk waiting to be added to the printer, and yes it is easy to get a measurement and read components from the board, but like I said in the spirit of the Open Hardware movement it would be nice to have the schematic and dimensions of the board, even existing version because Prusa very well uses GitHub for versioning.

However you provide nice info I was searching for suggesting https://www.printables.com/model/1016997-prusa-gpio-hackerboard-cover   , because Prusa didn't tell how to do with board wire on https://help.prusa3d.com/article/gpio-module_734695

Dubravko