BLHeli_S: (Mostly) Everything You Need To Know 

Rest in peace brother. You had amazing content.

Joshua do you have a cold? Get Well Soon.

I am usually a little bit snuffly, but right now I have mild allergies.

try local honey it might help , unless it's pet allergies

I would try some honey with some local moonshine whisky.. And stand with one foot in cold water bucket and the other foot In a warm water bucket.

lol, that should do it :)

+PatrickFPV glad to be some help.

BLHeli_S ESCs cannot run older BLHeli firmware. It's not possible. If you don't see input polarity in BLHeli configurator, I don't think it's possible. BLHeli_S removed a few options to make life simpler for users. Maybe input polarity was one of them.

you might not be able to reply to 'a' comment

Yes. BLHeli_S supports multishot out of the box.

Joshua Bardwell Thankyou

+Ultimatevapor918 I don't know anything about Spektrum, sorry.

They removed the bind feature on the rev6 :( WHYYYYYY lol. Yea Im about to make the switch soon as I sell my dx8.

NOOOO!! dx8 is life!! Anyway, get a standard rx and bind the satellite with it, super simple.(you dont even have to desolder if you stab needles through the heatshrink)

+Götz Leimann yes absolutely.

I agree hardware PWM is huge. The additional memory is also nice. It's why we can have OS125, OS42, and MS in the same ESC now.

+Pablo Contreras I don't think the startup tines are adjustable.

If you hit "check" and the ESC does anything at all, it's not in programming mode. It's not detecting the programming signal from the board, and it's mis-interpreting it as throttle signal or something. I don't know what the fix is though.

Definitely. Even at only 2k motor update rate, I believe there is an advantage to Multishot.

I'll have watch your "flashing multishot" video again.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0Bi1XcdpnQI.html

thanks buddy! ill give it a watch now

Sure. Why not?

+Joshua Bardwell hiya thanks josh I stared this month's ago iv had it half built up but put it aside till I got circuit board cleaning spray to remove residue from on the tabs there's a golden yellow colour on 2 tabs and it's not taking the solder josh but I was thinking maybe these esc & motor mite be to much power for this small frame lol but this is only my 2nd build josh but yes thanks very much that's made me feel a lot better now buddy what size of props and batteries would be suitable for this setup josh I think iv got two packs of 40-40 try props hopefully but I'll have to get batteries but I'm not sure if this will be a 3s or 4s setup I don't have a clue josh lol and thanks again for your help and advice josh

Yes.

+Jack Truong the name indicates the FET layout and dead time. Many ESC's share layout so instead of using the ESC name, blheli switched to a name that is descriptive of the layout.

+Hamza Bendahou there are a couple of DYS ESC's with a bug where the motor stops if you use reversing. Other than that no issues I know of.

Joshua Bardwell Thanks for you Quick answers !

Identical.

BLHeli and BLHEli_S both have improvements to the throttle calibration routine, but I still calibrate manually just because I like to. That being said, when I am in a hurry, I have used Motors Tab calibration and not had any problems.

And Sport is obviously better.

Actually the _S is a Silicon Labs trademark symbol. So I'm assuming the Atmel's esc's won't be getting BLHeli-S...

There is no OS42 build of regular BLHeli as far as I know. You can have BLHeli with PWM/OS125, or you can flash the MS firmware and get BLHeli with MS. Not sure if the MS firmware also supports PWM.

If only one motor gets hot, then check that the motor screw is not touching the windings.

joshua already checked the bolt and ta not touching the bearing, my engine and EMAX RS 2205 the esc are Littlebee 20A 2-4s battery 4s eachine.

Did you check the bolts with a multimeter, or visually? Only a multimeter can really tell. Check for continuity between the ESC output pads and the motor screws. Check every pad and every screw together. Other things that can cause one motor to get hot: bad bearing, out of balance bell or shaft.

my dear friend Joshua Bardwell, my problem was the engine screw even I switched the screw motor and it worked thanks for the tip owe you one.

No problem. Glad you got it solved!

Goat Simple NO. Active braking is not category of braking, it is just one of methods of braking, same as regenerative braking or dynamic braking (...) in terminology of BLDC motor drive (and that terminology are in use long before they was used in RC applications and it is inherited from PMSM). Active braking is a method of braking obtained by reversing the applied supply voltage so that the input voltage assists the back emf in forcing armature current in reverse direction (sometimes also called "Plugging" and you can look at it simple as slamming motor in revers). On other hand regenerative braking is method of braking where power generated during retardation is fed back towards the source i.e., the motor works as a generator developing a negative torque which opposes the motion and the generated energy is supplied to the source (contrary to dynamic braking where power is wasted in some resistance on heat). Active braking is most efficient in terms of braking, but it use energy from source for braking, on other hand dynamic do not use energy from source or return energy to source during braking and regenerative braking return energy to source during braking, but dynamic and regenerative braking are less efficient in terms of braking. edit: Using your division (if something like that would be valid for BLDC) regenerative braking will be in passive braking category.

Does the ESC actually work? Like does it spin the motors?

yes just 3. if blheli sees it i can flash and what not. takes like 30 tries to have blheli even see it

I'm sorry I still don't understand the answer. Does the ESC work? When you said "just 3" I'm not sure what you meant. Only 3 ESCs spin, or only ESC 3 spins, or what?

yes esc still work and it can spin the motors, but one 3 out of 4 will work.

I'm sorry, but I'm still not clear. 3 out of 4 ESCs work to spin the motors? 4 out of 4 ESCss spin the motors, but only 3 out of 4 can be seen in BLHeliSuite?

The different firmware choices like what? Give me an example?

www.dys.hk/Uf-pro/201663017177637.jpg

if you look at the link I posted, you should see what I'm talking about, otherwise just click flash firmware and look at the files available, most of them start with a letter then a dash then another letter then a dash and then a number.

Those are the different models of ESC, which require different firmware builds because they have different types of FET and different physical layout.

BLHeli_s supports multishot natively. You don't need to do anything special.

Thank you my friend .

+D Rock 75 dshot is a motor protocol. Blheli_s ESC's support dshot.

Joshua Bardwell , Gotcha! I was slowly putting that together in my mind. Thanks Prof. Bardwell!

+Brandon Robinson I guess it was removed in blhel_s?

The hardware should still support it though right? It just might not be exposed in the UI or implemented in the new firmware. Do you know where I could look to find out? Can I flash Bl-heli on a BL-heli S esc? Thanks a bunch for responding :D It's been pretty tough to find real information and this channel is great.

Especially because the RPM power protect setting still exists. That means the ESC is still aware of the RPM on the motor. So the loop could be closed.

If you were to dig into BLHeli_S's assembly code, you could potentially write your own closed-loop mode. That would be beyond the skills of even most coders.

I'm definitely not qualified to do that. Just wondering about backwards compatibility with BLHeli. If I can change from BLHeli_S back to BLHeli I should have closed loop back, I'll just lose out on some of the newer code changes.

In theory any ESC can do regenerative braking, it have nothing to do with FETs (MOSFETs) it is due control scheme how pass element (FETs) are driven (and in case of FET from FET driver).

Joshua stated that FETs can't switch fast enough, or did I miss hear him?

All ESCs have FETs, the question is how fast these FETs can switch.

Nicholas Heidl Speed of MOSFET switching is limited mostly by MOSFET driver. In theory you can make regenerative braking on even slowest switching MOSFET, but you then you will limit PWM frequency, which will in end have pure resolution ... There are some ESC that drive MOSFET directly from MCU, MCU have limited sink/source current on output pins (more 50 times less then worst dedicated MOSFET drivers, and 500-1000 times less then modern one), which limit speed of switching (turn on/off time is inversely proportional to driving current) and for PWM speed that are used for ESC there is "impossible" to do regenerative braking.

I thought so too, this is why I question Joshua's statement

No difference at all with a 4-in-1 vs separate ESCs. The FC can't tell the difference. I don't know if the Dodo specifically does or doesn't support passthrough but I suspect it does.

Thanks brotha. Have a good night.

gyro notch is applied to the gyro data directly after the gyro lpf and thus all terms get the effect with dterm notch the filter is only applied to the data used for the dterm.

When I learn something I need to know your the guy that educates me. Thanks!

Change the interface type from Arduino 1wire to Cleanflight Passthrough.

ok thanks, i was using the afro/turnigy usb linker with my UNO for non s . i will give this a try after work. thanks!

that says connection to flight controller failed. i plug in my dys blheli and it works fine on USB/com but not on clean flight either. connected to pin 0 on the uno

the micro possessor chip looks to be different on the s version EFM8BB2x looking at the pin out in-relation with the pogo pads. the four pads consist of I/o, Ground,vDD,rst the memory type is flash. this looks to be what most new esc Blhel s version are using now. maybe no single wire boot loader.

Joshua Bardwell www.rcgroups.com/forums/showthread.php?3139559-programming-ttsrc-20a-blheli-s this is how i got it to work dont even need a lipo just the uno.

+Pete Busch this is a pretty old video and a lot has happened since then. So what did you want to know that wasn't in the video? I can't help you if you don't ask.

Sorry Josh just frustrated getting BL Heli to read my esc. All the video's that explain BL heli and Beta flight are greatly appreciated but when things go wrong, and it seems common, then were SOL LOL. I tried updating the driver on my esc using zadig as explained on another you tube channel, not yours, and it failed and won't let me do anything at this point. The esc is this, pirofliprc.com/HGLRC-XJB-F428-TX20-Omnibus-F4-Flight-Controller-28A-2-4S-BlheliS-ESC-25100250mW-Switchable-VTX_p_4210.html

Blheli32 is the latest now.

@@JoshuaBardwell But miss the "S"

@@JoshuaBardwell Where can i download?

I really have no idea... There is literally no difference in my production process, and I've never had it happen myself. I don't want to risk getting another community guidelines strike by directing you to do anything in violation of RU-vid's TOS, so I don't suggest that you find any other way of watching the video, especially not as a strictly diagnostic tool, to see if the raw file has audio in it.

If i play back on my iPad it is fine. Ive tried an incognito window and the same thing happens. One reason I made the comment is because i am wondering if anyone else has this issue

Maybe you have some browser extension that is breaking it. Extensions are disabled in Incognito mode.

Try firefox you might have an old version of chrome as they have stopped supporting some operating systems now.