Delta_G:
You mean the pin numbers? They're just numbers. I usually use byte so they'll take up only one byte each. Some folks use int, but to me that's wasting a byte of memory. I also usually make them const to keep me from accidentally changing one somewhere.const byte pinNumbers[] = {4, 5, 6, 7, 8};
Eh, sorry, on the Wemos the digital pins are D1, D2, D3, etc.
In Arduino terms, what are A0, A1, A2? Are they also numbers, in that they are symbolically linked to numbers?