(SOLVED) i2C Error in PID Tuning of MultiwiiConf GUI 2.3 (GPS UBLOX) - MAHOWIK BalancingWii

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Really, 28 x 100's of thousands LOC and it runs on an Arduino? Impressive.
I can't help any more due to lack of wiring and code plus unexplained acronyms. Good luck.
We don't chase links.