Actually I started on a nano for this project and it broke. Apparently there is an issue with the batch I had from gravitech.
So I ordered a nano, in the interim I am using my spare uno.
On the Uno, the Analog pins can be used as Digital pins, so in this particular project D2 to D13 is used as is and A0=D14, A1=D15, A2=D16, A3=D17, A4=D18, A5=D19
Here is a link to the one I purchased
There was no datasheet, maybe someone can find one, but this was just an experiment, get my feet wet experience.
I primarily purchased it for text, but now that I can display a scannable QR code, my imagination has expanded.