Wrong VBAT voltage – FIX

[Mark]

Thanks for the help guys. Much appreciated.

Rather than take on the soldering task on such a small component, is used a FrSky voltage sensor instead and I am now reading the AD2 voltage. I have all the telemetry I kneed now.

Very smooth and stable tricopter.

🙂

[farshidjh]

Same for me here. biggestRCfan pionted me here and learned this has been an issue. For both of my boards one ordered late December and one ordered in February this is the same.

I fixed mine with a 56K in series with the cable to VBAT and changed my scale to 65 for now (reduces resolution and accuracy). Will desolder the resistors later.

Stil worried that initially it may have damaged the STM, as such resistor network, with a 4 cell will expose STM32 ADC input to 15.27V with a 10 K in series. Hope the chip is still alive and its integrity is intact. Will fly with it soon and verify.

[Author]

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