In the moment i am working on a 1s nanoquad. Right now i am messing with the software stuff. Since i want to use bidirectional Dshot i needed to flash my blhelis esc to bluejay. I flashed it to the latest version (19.2) at 96 kHz, which all worked fine. But since i did the flashing my quad behaves different. The motors dont spin up right when I arm. In order for them to do so i have to raise the throttle to about 20 - 30%. After that i can drop it again and the motors keep spinning (while on ground at least). When i tryed to fly it in the air it felt like the motors were stalling so i played with the dynamic idle a bit. At first had it on 94, then i tryed something higher and even lower. Nothing changed after that. 
A nother thing that happens is, that even when i turn of dshot, the quad now hovers at 50% throttle. With blheli s it was 33%. 
Dont know if i missed any settings or got anything wrong but maby you can help me. I just want the motors to spin up, when armed and the throttle back down to 33% (and no stalling of course)
Thanks

Look into your startup power I think:

https://github.com/mathiasvr/bluejay/wik...m-BLHeli_S

Tried on 48kHz? Same?

Go back to version 16…Ciotti discovered this a while back.. he was having whoops call out of the air with aggressive throttle and. Yaw maneuvers. He originally thought it was tbs AIO boards.. but discovered it was versions of Bluejay (newer than 16).. . but recently found out that a “main person” that had been working on Bluejay had left just after 16 was released ..

I now also tested it on 48 kHz. It seems to be closer to what i want since the motors at least try to spin up. However in flying i still have to go up to 50% throttle. And tweaking with different values of the dynamic idle doesn´t seem to change anything.
The latest version i could flash on esc configurator would be bluejay v 17

did you set 1s esc or 2s+
make shure you got set it to 1s.

as you like more power, 24khz will be benefical

(19-Sep-2023, 09:13 AM)retrobatman Wrote: The latest version i could flash on esc configurator would be bluejay v 17

For v.016 you have to download the binary file for your target, then use ESC configurator to load that binary file from your computer. You can get v0.16 binary files from here: https://github.com/bird-sanctuary/blueja.../tag/v0.16

dont bring him to switch to another bluejay version cause of a complete different issue.

the bluejay developers and the rest of the community doesnt get that "issue", ciotti just went in a tuning issue - he doesnt understand the relation of startuppower and high khz frequency and the relation between power/khz and tuning issue.
while some tell to follow his advises, i would reccomend to make a huge step around ciottifpvs suggestion - i see his solution, to step to another esc version, as very wired way of tuning.
there is no consensus by the community to that "issue" and there is nothing described by which points in that direction.


1s or 2s+ can be set in bluejay configurator, it does adjust startuppower

Downgrading the ESC firmware really is not a big thing, even for a noob like me. I've read about the questions behind his "discoveries" but so what. Noobs like me don't understand the relation of startuppower and high khz frequency and the relation between power/khz and tuning issues either. Trying an older version of ESC firmware is such a simple thing to do, and as far as I know there are no dangers with Bluejay v.016 so there is no reason not to give it a go if you are having similar issues.

Edit: With the above said, the issue that Ciotti suggested downgrading to v0.16 is nothing like the issue described here. So yes, my advice can be ignored.

My advice also.. I had just heard Bluejay has had “issues” with different FCs when updated . I do not understand the ins / outs of esc firmware.. just passing on a possible suggestion

(19-Sep-2023, 09:13 AM)retrobatman Wrote: I now also tested it on 48 kHz. It seems to be closer to what i want since the motors at least try to spin up. However in flying i still have to go up to 50% throttle. And tweaking with different values of the dynamic idle doesn´t seem to change anything.
The latest version i could flash on esc configurator would be bluejay v 17

https://youtu.be/7HfyztXcnP0?t=544

Already watched that video ?. But thanks. I raised the values up to the max so this was not the problem. Now flashed it to 24kHz. Seems to be my solution. The motors spin u when armed as they should and hover is back down at maby 40. But I couldnt test it outside yet cause its stormy there. If I have further problems with it ill let you know.

i set my 1s settups motortiming to high in general, they spin up nicer

to improve the throttle feel on 1s whoops, i personaly set throttle mid to 0 and throttle expo to 0.1
thats not how throttle mid is set commonly, but it works for me :-)

Quad is almost finished with tuning and everything works well. Thanks guys.