Every programmer learns to count from zero. Betaflight agrees: AUX channels are 0-based, so AUX1 is 0 and AUX6 is 5. Type a few CLI lines and your fingers stop thinking about it. Count from zero. It's the rule the whole configurator seems to run on. Then I lost an evening to a VTX that flatly refused to output 400 mW, …

A collection of "first 10 minutes of a new build" failures and how to diagnose them. Wrong Motor Direction (Single Motor) Symptom: Quad lifts but drifts or rotates on the yaw axis; one arm tilts down immediately on throttle. Cause: One motor spinning the wrong direction. Motors come as CW and CCW variants; some have …