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On the back it says it's an EY21. What's this?
(1) After some hours plugged in to the dumbest charger I can find the light goes off. I've left it plugged in, but I'm a bit less hopeful.
(2) It's not getting far enough through boot to show up as a USB mass storage device!
(3) That picture needs clarifying, then, because the arrow for RX is definitely pointing at the resistor, not the pad.
Re using conductive ink... that's very interesting. I had thought about trying to rig up some kind of jig using three needles pressed into the pads, with my TTL converter plugged in to the other end, but keeping the whole assembly rigid enough to make good electrical contact would be tricky. (I can just about solder a 0.1 inch connection, two times out of three.)
Hmm. How about a piece of blutack on one of the enclosure cans, supporting the three needles, with a big rubber band around the whole chassis to maintain pressure on the pads...
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