So I got home last night, and copied and pasted directly. Nope. Still crap output. Do I have the power going wrong? Switches Vin and Ground. Burned my fingers. Stitched them back. No change on crap output. Yanked all the jumpers and started fresh.
So that’s where I had gone wrong. It turns out that given three wires I still managed to hook them up wrong.
So. Step one. Start using multiple colors of wire. Jumpers to soldered in place. I need to do this.
Two. If in doubt, check the wires. Now, I just need to solder on headers to one of the Things, so I can start getting my remote temperature logging on.
Peter's stuff.