sskaug

There is a component of both manufacturing accuracy and of temperature drift. The oscillator is internal to the MCUs. You can find info on them in the MCU datasheet that...

That is really bad. Good that FCs use an external quartz crystal. The 'F051 is much better: 

Nope. We do not know exactly how frequency changes with temperature. And it will vary from unit to unit. If higher accuracy is required, then an external quartz crystal should...

That can probably work for setting the timing of the bidir dshot return data. But for getting to sub 1% accuracy, I doubt it will be feasible. One aspect is...

You can find it here: https://github.com/bitdump/BLHeli/tree/master/BLHeli_32%20ARM/Dshot%20extended%20telemetry%20testcode

We have not yet published it because HW require a long time for approval of new codes. So for the meantime I've put testcodes here: https://github.com/bitdump/BLHeli/tree/master/BLHeli_32%20ARM/Misc%20testcodes

We are still waiting for HW's approval on this. In the meantime download it from the testcodes area. It is exactly the same code that will later be released with...

Using 1.65V or 2.4V reference as you propose in [bird-sanctuary/bluejay#53](https://github.com/bird-sanctuary/bluejay/issues/53) is probably the way to go for Bluejay. BLHeli_S is no longer being developed.

Please let us know which firmware your ESC has (the name that show up in BLHeliSuite32 or the Android app). Note that if your MCU is AT32F421, then the oldest...

Rev32.7 now posted here: https://github.com/bitdump/BLHeli/tree/master/BLHeli_32%20ARM/Misc%20testcodes