A prize for being prize prat
As many know, I'm into radio controlled models, and for the last couple of years, that's been quadcopters (drones, for the uninformed).
Well, I built up a new little racer 2 or 3 weeks ago, despite having the bits, bar the FPV camera, since last spring/summer time, but have been really fighting to get the telemetry to work. I check, double checked, and triple checked all the wiring, the flight controller settings and the transmitter settings. And then checked them again, and again, as the damn thing wasn't giving any telemetry data back from the flight controller, just from the receiver itself (which is pretty much naff all).
So, imagine the lightbulb moment, when it dawned on my that because I mounted the receiver upside down, I'd done the schoolboy error of connecting the wrong pin.
Quick bit of resoldering to the right pin, and issue resolved. What a first class pillock