Betaflight servo setup (controlled by aux channel)
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- เผยแพร่เมื่อ 19 มิ.ย. 2024
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How to set up servos in Betaflight? It's one of the most difficult things to get working. I've helped a few people do it, but never made a video about it before. Today is the day. I'm going to help Sean Morrison get a bomb drop servo working.
Sean's channel is: / @letsflyrc
Thanks for you help, buddy. Turns out the lipo was dead. The servo still works fine. Haha.
Thanks guys. This one was one I couldn't figure out for the life of me. I needed PWM for the MudLED controller for the LED strip. This got me up and running in no time. :)
Thank you Joshua, this worked well on a Diatone Roma L5 (FC: MAMBA F722 AIO MK1, using the LED pads), supper happy with the outcome!
JB, I have been using Servos for years as I started out on RC planes about 30 years ago. However I found this video very useful for putting servos in Quads so Thanks. There is one thing I would recommend you do, get a servo tester and before you wire up the servo Centre it out (what this dose is puts the servo arm in its centre position) then you will get full throw of the arm.
Brilliant, ive ordered a lazer pen with filters so i can manipulate the patern and it will be seen from above, ufo style, one led to tringer the on button and one for servo movement.
As i fly mostly in the dark, cant wait, i believe if you use your side sliders as a channel your servo will move proportionately. Cool
Thanks so much for the video Johsua! I was able to connect an old gimbal to my quad flight controller using this!
35 years flying fixed wing planes.. there is a HUGE market just waiting for FPV.. JB! You are the man that can help me figure this out! Can we please make one of these videos together?
Can you elaborate?
Almost to 150k subs.... Gratz JB!
Thanks for the awesome tutorial. I followed your building tutorial thoroughly and used the drone for my school club. I was able to get third place at the TSA state conference for the drone event. Your videos were very detailed and we had no issues while building the drone.
Glad it helped!
@@JoshuaBardwell If it’s not difficult for you, you could still tell me how to connect three or more servos. 3:48 You mentioned in passing about the reassignment of resources. Thank you very much
This is so usefull, there are loads of modules/switches/relays that can run on a servo input. I also now have a known value on a pin I can use to interface with an arduino or pic.
Pretty interesting! Thanks a lot, Joshua! 😊
Now I'm thinking about building a quadcopter to spread tree's seeds. 😬
That's really cool!
Thanks so much for your reply. My problem was not attaching the satellite to the Spektrum AR8000 receiver. I tried a HK Orange receiver and it worked great. I then configured a Corona 8 channel and it worked. Poor troubleshooting on my part, very embarrassing for a retired EE! I'm a fixed wing guy playing with new technology. Now on to an Omnibus F4 and Hero32.
Joe Caraco
Cool...I hope this helps me configuring my tricopter!
Yup! I posted my servo gimbal a few days ago in the rr group!
I am building an RC plane out of parts I have lying around and that requires 3 servos (left/right aileron and elevator). iNav would be the natural choice but since I am using two motors, my FC only has 4 motor outputs and iNav does not allow resource remapping I will try my luck using Betaflight channel forwarding. Apart from the remapping part that doesn't seem too bad.
Welcome back!
Hello. Is there a way to use a old aio board with 12 amp esc for an rc car? Like use a servo and use one of the motor output only for 2channels?
GREAT THANX YOU GREAT MAN for this video!!!!! It helps me very much. Salut from Russia!
Patience payed off again
Worked like a freaking charm boys!!! Now, I'm currently thinking through my latch mechanism, and this is going to be so much fun!!! I'm running a Speedybee F4, and who needs led lights anyways!! Lol
It looks like the speedybee f405 has a dedicated servo pin at s9
Thanks so much for the video! I have a Nazgul Evoque that is already using the led spot on the board. Is there a way to find another place with its own timer without disconnecting the led? Thanks!
i wear those jewelers magnifiers as well EVERY TIME i work on kwads, i love them i have several pairs. and some have leds on them, i couldn't build without them!!!!
I understand everything but one, I have an omnibus f7 v2 controller. To what pin on the PCB do I have to connect the servo if it wants to use it as a load drop mechanism, controlled by a switch, or as a lighting switch. I know that you can probably use a pin for LED, but can I use, for example, pins to communicate with GPS? or some other?
Good stuff, now I wanna build a tricopter.
WackFPV iNav
Excuse me, but you had the opportunity to do this video some years ago now. Because I have asked specifically (I think. Though I have but just now started watching this vid for the first time. So not 100% sure whether or not you cover how to do what I want to do with one servo on betaflight.) For how to get a servo to do any goddamn thing on betaflight. I figured if I could get at least that much I could figure out how to achieve this specifics of the remainder of what else would be needed to achieve the effect in which I have wanted to do since I started in FPV approx. 4+ years ago.
Although at the time of asking I wasn't interested in imposing upon you a bunch of extra work to make the video of how to do what I was trying to learn.
Super.This can be used for dropping something
Hi,
I have 3 Kakute F7 mini V3 that I plan to put on INav but there is not the right target even if the after-sales service of Holybro tells me that it is at INav ^^
So I flash Betaflight and the Servo tab is missing ??
Do you know how to invert a servo in CLI or to reappear the Servo tab?
Thanks
I've been using this method for a few years as I have camera tilt servos on all my quads, usually using a motor output. I never figured out what Live Mode does and have never gotten channel forwarding to do anything. I've also had Betaflight on gliders and planes which works well stabilization, osd and telemetry.
hi! how do you do to make servo work on motor output? same as the led strip out here?
If you could tell me how you make this work on a motor output I would be SO grateful. I'm using a tinyhawk 2 fc to build a plane. I have three working esc's, on the fc but am only using 2 and if I could use the third for a servo it would be awesome!
I need to know too
Hi JB, I set up a Hexacoptero F550 to launch rc parachutes, I'm using ERLS 2.4 and a FC Jemcu F722, I need to add a servo to release the rc parachute, I couldn't get the servo to work using the LED port, because this command It doesn't work in the CLI, can you help me with this?
Awesome Video, helped a lot :)
Anyway we can get a pt2 to this ? How to adjust the min and max and why a 3 position switch is different ..
This has been a big help. I have a Kakute F4 V2 in my LR Tricopter from RCExplorer. Added GPS with some wiring changes, and the tail servo went nuts, see my LR Tricopter trials video on my channed if you want to see it. Thought it must be software, so flashed latest Kakute firmware to the board and the servo stopped working, totally unresponsive!
I did many mechanical changes that I thought would fix it, changed servo, added a dedicated BEC for the servo, wiring this way and that. Nothing moved that servo.
Then, I found your video on the subject of servos in FCs, and after relating your info here to my situation, I was able to get it working, yep, like you did, on the first try!
Fantastic help to what I think is a common problem for tricopter flyers. Cheers!
What servo are you using, or what servo would be reccommended?
3AM and five beers too many and needed to get an old tricopter up & running (yaw servo). with a NAZE32 (F1 controller).
Nope-
Switched to cleanflight and got it going in about 15 minutes.
I have never even used cleanflight till now.
do you know if this would work in libre pilot?
Hello, thanks for your video !
By using the LED-Strip it´s working very well with Servo 1 (Tilt servo). When I´m trying to map Servo 2 on the same LED Strip (when Servo 1 is unmapped) it doesn´t work. So no movement of the servo, when I´m rolling the copter.
I would be very thankful, if you have any ideas for this !
Greets from Germany !
Keep up the great work :)
omg it worked, thanks
Do the motor outputs have a clock?
Thanks man👍
Worked for me
Thanks!
You can test Servo and motor outputs with a voltmeter.
I want keep the LED , what I can do in this case?
I know this is a year old vid, but I am working on a project with a tinhawk 2 flight controller. You mentioned that this has to be a pin with it's own dedicated timer. In this case the LED pin D12 was used. Other than LEDs, what other types of pins might have a dedicated timer? I'm wondering if my little tinyhawk 2 board has one I can use.
Wondering this too he talks in the video about how this method is good for two servos but never says what other pad to use lol.
@@Itaintme31178 if you ever find out let me know.
JB... we need help!!
ma, af may I ask? I use a tricopter and I don't understand it for yaw, I want to use a servo on motor no 1, ask for a tutorial,
Servo Tilt and Channel Forwarding are weird, I once needed to put out an AUX channel as a motor value (so it was motor 5) to adress an onboard speaker on a pdb... don't ask... ;D
I think in the beginning I used both but iirc it also worked with just Channel Forwarding. ;-)
Could you use a motor channel for a servo? If so i have a quad pdb fc i wanted to use in a delta.
Usually yes you can use a motor channel.
I’ve been thinking the same thing! I’ve got a couple happymodel FCs with a burnt esc and I was thinking about using one for a micro flying wing.
@@gokartmozart9430 Same, i'm watching this vid to do that
Is it the same procedure for iNav? Thank you.
I'm going to use the servo to trigger a switch to turn a high-power strobe off and on. If you know a better way to do this please let me know.
I am looking at the same problem and it is much easier to just get a TX Controlled Relay Switch. The 10A rated ones cost about 8usd. When the PWM is below 1400us the switch turns off when it is over 1500us the switch turns on.
@@sendorm thank you for the input. I am going to be running a Crossfire receiver that I expect is SBUS. I don't think I will have a spare PWM output. I want to run a relay off the flight controller. I am not an electronics expert but I think I'm going to be using the WS2812B LED to optical switch a light sensitive resistor or photodiode circuit through a Darlington transistor and relay. You would think iNav and the flight controller designers would provide a switch for accessory operated by a uart.
Hello Mr. Bardwell ... I do not know if you have time to answer my question, but I will ask anyway ... Unfortunately I do not find any information about whether the flight controller must always be in the middle, would like to put it in the tail build my copter ... Is that possible or does it affect flight behavior?
Greetings Miguel
The FC does not have to be in the middle.
@@JoshuaBardwell Thank you very much for the help ... And a big compliment to your work and the effort you put in ...
Greets from Germany... 😊
I want to incorporate this into a servo that will control camera tilt. Mix it to go to 40* in Acro mode, and like 5* in Angle mode (for landing).
That should be fairly easy to do, and a pretty neat use for the servo function.
The trickiest part of that is probably designing the servo camera mount so it fits inside the frame to be protected during a crash.
Easy to do just map the aux channel to the switch and then set the channel values to the desired camera tilt. The big problem is the situation is not very durable in a front impact.
FINALLY!
if I use a quadcopter and I have outputs for 8 motors, can I remap two motors to use them as servos?
Probably but not guaranteed.
Hi Josh,
I got my servo to work so thank you very much. However, I now need my switch(aux) to have a safety function. So for example; something like 3 presses of the switch will then activate the servo movement from 0 to 100. Then one more press of the switch returns the servo to 0. The servo is being used to bridge a connection to activate another function. So I am wanting my switch to have a safety function basically(2/3 presses), so if it is pressed accidentally. It wont activate the mechanism. I don't know if this can be done but if there's anyone that will know if it can be done. It will be you ;). Or maybe you can think of another/better way? I'm using the Tango 2 btw and the "D" switch.
Use a 2nd switch as a safety. Make the 1st switch be locked out until the 2nd switch is pressed.
@@JoshuaBardwell Yeh I sussed it pretty much straight after I posted my comment. I'm smarter then I think haha. Thanks for getting back to me though (y)
Brilliant. If two servos were needed, what would be the best way to do that?
Iike the person you worked with the other day, I am also doing a nerf and drone integration.
Mosfets to be triggered by .?. 5 volt output is needed, and also possibly another mosfet control for the Rev wheels. (it's a Nerf rival with an agitator, and flywheels. All can be controlled via motfets or physical switches that go into the mosfet board (s).
See suild .com and their mosfet boards for more info.
If all you need to do is trigger a FET, use pinio function not servo. But get a realpit or other FET that can be triggered by 3.3v and it will make your life much simpler.
I use Servo for my Kwad to control Camera angle with Drone angle instead aux channel
We’re would I wire multiple servos and set up betaflight
th-cam.com/video/L-6r2iX1p6s/w-d-xo.html
can we use buzzer pin instead of led strip pin?
Maybe. The buzzer- pad has a transistor that buffers the output to avoid pulling too much current from the MCU pin. This transistor may not respond fast enough to allow a PWM signal to pass through without being corrupted. The buzzer+ pad is just 5v so that wouldn't work.
Can I power 1.5 gram servo from FC 3.3 v onboard bec?
Definitely not.
So lemme get this straight, you solder the wired to 5v, ground and led pad, also how do I check if led pad is in use?
If there's an led strip soldered to it its in use.
@@JoshuaBardwell thanks for your reply! Could you recommend some cheap servos (that only need to be able to pull a pin for a dropping mechanism) that I could buy in Australia, thanks
I don't use servos often and wouldn't know what's available in Australia.
How can I tell if another pad has a timer on it? Thx
It's very difficult to do it since BF does not have any command line output that shows which timer is assigned to which pin. You can read the target definition file on github and if you know what to look for you can do it that way.
In general, LEDSTRIP will always work. Motor outputs on modern FC usually will work, because Dshot also requires a dedicated DMA channel and timer.
Joshua Bardwell thx
newer versions of BF has the timers command
Alex Yip cool thanks
@@alexyip Just type "timer" in CLI then also type "resource" and match up the pin resource code like "D12" to find
that timer D12 matches LED_STRIP. I've been wondering about how to do this. Thanks for clarifying this Alex and Joshua. Much appreciated.
Ehi Joshua, what about to controll servo by yaw? For tricopter you know.
Betaflight has a tricopter mixer but it flies very badly.
@@JoshuaBardwell LOL happy we didn't try also wanted LED control on our Tricopter so I would have had to find another output with a timer and on an old F1.
Cleanflight did the job and he crashed it 1/2 later at 4AM in the dark so that sure was a productive night.
I mean *it* flew fine.
HobbyKing Trifecta.
worked 2021, June 1
just does not works.. i have a fpv drone mamba stack and a. servo all runnung on dji hd. but servo not working.
Would be great for falconry
just noticed that the direction/rate doesn't work (at least in BF 3.5)
how to activate servo on channel 3 or yaw??
You need to change Betaflight to a trictoper mixer then it will know that yaw axis is controlled by a servo.
@@JoshuaBardwell I have set it to tricopter, but it doesn't work, I even followed your video, but it still doesn't work
For tricopter mixer, servo 1 is the tail. You must manually remap servo 1 to be some output, such as a motor output. After that, I don't know how to proceed, because I have never built a tricopter with betaflight. It's been a long time.
I didn't have much issue setting up a servo on my Kingkong ET125 to drop tetrahedrons on command. I even swapped out the momentary lever on my TX for a momentary push button. Watch the last 10 seconds: th-cam.com/video/vy8kXkl9oqM/w-d-xo.html
@Flying Buzzard Thanks, this summer I'm going to take the dropping things idea one step further...
I have 3 little plastic green army figures with parachutes :D
@@licensetodrive9930 Pretty interesting, dude! 😃
I guess we could use it for tree's seeds!
@MC's Creations A servo-drop method would only be able to deploy a single load of plant seeds per flight, to cover a large area, a screw conveyor would be the simplest & easiest method of delivery.
en.wikipedia.org/wiki/Screw_conveyor
An even better idea, you can use it to drop your malfunctioning battery powered beeper on the roof of your annoying neighbour's house, @@MCsCreations.
@@Asu01 That's not a bad idea, dude. 😬
Sooooooo why does he need a servo for a quadcopter?
anybody who knows what happened to snake fpv? his channel is private, no updates anywhere. I hope he's not ill
Having an issue with this, no idea what the problem is. Here's a video of the problem th-cam.com/video/CyJEJuUaCZo/w-d-xo.html , I2c errors start racking up same time motor goes out and servo starts moving. If anyone had any insight, kindly pass it along.
I've been using Servos with Beta flight for years. Even have a Bicopter that uses two Servos.
rotorbuilds.com/build/18082
Any chance of doing a how to video? Not many of those out there and your bicopter looks cool!
@@pelletubbies Wanting to do an upgrade on the Tilit-Mechs so yeah it could be possible to do a short video. No idea when though as I am waiting on my Prusa printer to arrive.
Another thing is that with BF 4.1 + we have the option of motor filtering whch should allow for much smoother / controlled flight. Which if you recall was one of the major hangups with a Bicopter.
Here's an earlier flight i did but its a little out of focus: th-cam.com/video/wqk_aa5t4d4/w-d-xo.html
dont suppose you,d like to share that information? all i want is to get 2 servos working for a flying wing, thanks
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First?
I'm a big fan Joshua, but for goodness sake are you really making a video about a "bomb drop servo" with everything that's going on do you really think we need any further bad press. Engage brain JB.
Dropping bombs from a drone isn't rocket science ;)
Guess you dont watch Flight Test?
This is a very basic function Betaflight that has a zillion benign uses. It is sometimes referred to as a bomb drop but in practice, using it to drop a bomb would be much less precise than simply flying the drone into the target, like they tried to do with Maduro a while back. If you really think this is a threat, then why not argue to the BF devs that they should remove servo functionality altogether. Which would be dumb. So as long as the function is there, I will demonstrate how to use it.
@@JoshuaBardwell i realize it's a basic function and i agree servo control does indeed have many useful applications, but your video description specifically mentioning "bomb drop" is just fuel to the idiots that want to ground us all. You could have made a video to demonstrate servo control in any other application, just not how to drop a bomb. And FYI i don't know what the current laws are in the USA but dropping anything from a drone is specifically and explicitly against the law in the UK. On that basis your video is describing how to commit a criminal offence. I am absolutely certain TH-cam must have rules about promoting criminal activity.
"Bomb drop" is just a search term because that is how this function is typically referred to. It doesn't mean that you are literally dropping bombs. Since you don't know what the current laws are in the USA, and since you don't know anything about the YT terms of service, why don't you keep your opinion to yourself, instead of stretching for something to accuse me of.