I ended up soldering some wires directly to a Mini Pro and installing it on my motorbike. It works well, but I didn't think it through enough and now - with my bike in the garage - and my PC in my lounge - and a Mini Pro that's not easily removable - I can't easily do software updates.
Which begs the question of "what's the easiest way to upload a sketch if one can't connect an Arduino diretly to a PC USB port"?
I did a bit of Googling - looks like there is an IDE for iOS or iPadOS - but I think that's only for writing the sketch and it still needed to be uploaded via a PC (so no good) (even though I have an official lightning to USB converter from Apple). I also have access to a Raspberry Pi (that I haven't used in years and isn't connected to a screen).
Just wondering if there's a quick and easy way? It doesn't need to edit a sketch - I only need a way to upload something that I've written & compiled on a PC.
Any ideas anyone?