Thanks, but the post you linked is making me irrationally angry. Why does a gas pump card reader need full internet connectivity?! It's outrageous! Just use

Thanks, but the post you linked is making me irrationally angry. Why does a gas pump card reader need full internet connectivity?! It's outrageous! Just use the two wires to talk to a head unit in the building! Then it brings up the gas pump advertising screens which are already a sore point for me (two conveniently located stations have these, so I can't go there anymore because I find the accompanying audio intolerable). The whole situation smells like it involves a lot of vendor lock-in, too (which I always hate to see).