Arduino?!? cough-cough-hack
I’m more of a Propeller guy, myself… https://www.parallax.com/catalog/microcontrollers/propeller.
One of my ‘one of these days’ projects was to make a Prop plate for a Raspi. All the realtime processing on the prop, with storage / opc / development on the Pi. Yep… one of these days…
Did you have a project in mind?