Betaflight 4.5 GPS Rescue Setup Guide
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00:00:00 - Betaflight 4.5 GPS Rescue... you have to configure it right
Betaflight 4.5 official GPS Rescue documentation: betaflight.com/docs/wiki/guid...
00:01:24 - GPS Wiring
00:03:11 - Get the FC to talk to the GPS
00:04:17 - Manual baud, Galileo, and Ground Assistance
00:05:14 - Set Home Point Once
00:06:25 - Now you have a working GPS. What next? Test autolevel.
00:08:05 - Find your hover throttle value
00:09:37 - Set the Stage 1 Failsafe and GPS Hover Throttle
00:11:59 - Recommended baud rate 57600?
00:14:15 - Pre-flight checks of GPS Rescue
Build an FPV drone in 2023 - Part 9 - Betaflight Aux Modes
• Build an FPV drone in ...
00:16:10 - Direction Home arrow pointing wrong way
00:19:15 - First GPS Rescue Test Flight
00:22:20 - Have I earned your support yet?
00:23:51 - Set up and test Failsafe behavior
00:28:53 - Set up and test GPS Rescue Failsafe
00:31:51 - Enable HDOP to better know GPS health
00:33:41 - A few gotchas you should NOT forget
How to align your compass: • iNav Drone Complete Tu...
My Betaflight 4.5 Playlist: • These Betaflight 4.5 F...
M10 gps and Betaflight 4.5 are really amazing.
@12:10 The faster GPS baud is CPU intensive. It's advised to use 57600 baud AND 4k pidloop (even for F7) per the "Betaflight 4.5 GPS Rescue" docs. If you want 8k8k then you have to use 2Hz which is 19200 baud.
Great how-to.
What about for an H7 processor? If I remember correctly that processor has 2x the clock speed over F7
@@aidanfarley9566 probably good there. I would ask Ctzsnooze though to be sure. He's very available on the Betaflight discord.
Ive had no more issues after i changed to dshot 300, still running 11700. Should I change the value lower still?
@@soar_fpv there is some kind of issue that hasn't been figured out yet, dshot300 seems to solve some of these. Regardless, 57600 baud is advised and sufficient for 10hz updates (which gives stable rescue mode flight)
@@BrandonBeans makes sense. I appreciate the input.
About Galileo:
It's the satellite navigation system of Europe.
GPS is American made, then there is GLONASS (Russian) and BeiDou (Chinese).
GPS, GLONASS, BeiDou and Galileo are the biggest/most well developed systems.
General term for these is GNSS.
Most GNSS receivers can work with three systems simultaneously.
Yeap, that's what I was going to say. 😊
More satellites the better. (Although they're pretty far... But who knows.)
Galileo is a constellation of satellites (European) same as Gps(American), Glonass (Russian) Beidu etc… SBAS stands for Satelite based augmentation system, based on ground stations giving possible corrections to certain satellites being off time, transmitting it to a ref satellite (Wass is PN the Us, Egnos in Europe or Gagan India, etc..) to compute the correction signals, the SBAS geostationary satellites communicate with regional ground stations and this leads your system to use more satellites even if they are not perfectly synchronised : more satellites being used leads to a better position precision less than 2 meters in my case !
In the official 4.5 release they replaced HDOP with PDOP.
The CLI command to include DOP in the OSD is now osd_gps_sats_show_pdop.
Some words on the CLI parameters GPS_RESCUE_VELOCITY_[PID] and GPS_RESCUE_VELOCITY_[PID] would have been good. They make all the difference of either letting you sit back and enjoy the auto-return or, when set incorrectly, giving you a heart-attack. Any pitch-jerking on return or throttle oscillations on the descent can be tuned away.
Correction, I meant GPS_RESCUE_THROTTLE_[PID] and GPS_RESCUE_VELOCITY_[PID], of course.
As for the ground assistance, in north america it's safe to set it to WAAS because that's the only one available here.
I highly highly suggest anyone using gps to have WAAS (or your local equivalent) enabled, because it takes the normal gps accuracy of 50 feet or so, and turns it into ~3 foot accurate with basically no downside. It's the same technology full scale aircraft use all the time to navigate to runways even in poor weather conditions.
If you connect the GPS to a USB powered pad, it will sometimes interfere with BetaFlight firmware flashing. The iFlight F7s have this issue and it’s happened to me on IARTs I’ve been told it should be an issue on. It definitely happens on the one recxomended for GPS. Crossfire also has this issue. What has worked better for me is to use a flight controller with a built in put switch and use that to turn off the VTX for the first flight of the day until I get a fix. Your flight controller has this and also does not power the GPS from USB. This is much easier to deal with than plugging in USB for the first GPS fix.
Or maybe try INAV. Also flies great Acro, and will raise to a preset altitude to clear the highest obstacles before making a beautiful landing at the takeoff point or a safer preset home point.But...good progress BF. Looks very useful.
BF will either raise to preset altitude OR a preset height ABOVE the highest altitude you have flown during that flight. Also, it lands perfectly smooth touchdown, I was impressed that one one landing one prop just tiny touched a leaf on a bush.... it immediately disarmed and dropped the remaining 2ft
Ah as well with INav..I am happy to see BF doesn't require a compass. Great advances!@@TurboThailand
@@spartan3299 I was thinking exactly the same thing. 😬
Thanks for the setup explanation. With the GPS, HDOP is "horizontal dissolution of position" . It shows how much you are drifting horizontally. Less is better. Roughly speaking a 1.6 HDOP means your quad will hover 'in place' within a 1.6m horizontal square.
Thank you so much for this video. I swapped out the m8 chip my quad had come with with an m10 and then decided to try to set this up. Must have watched this video 5 or 6 times. Flashed BF 4.5 on my new quad and then set GPS rescue up to a T as instructed in this video. Very first test of it returned to home successfully 5 times in a row. Only small hiccup is the altitude is all screwy and thinks it's higher than it is and descends way too fast. This would have saved my butt a few days ago when I fail-safed halfway up a mountain lol. Thankfully the VTX stayed on so I was able to find it and got some good exercise in the process.
I know we’ve come a long way in the FPV hobby and I appreciate all the things the devs do, given that this is a volunteer open source project. But I’m still surprised it’s this complicated to make return to home function, sort of. Also, the heading arrow should really just be taken out. If it doesn’t work reliably most of the time then it’s really a hindrance. I nearly lost a drone by relying on. My bad I know.
Issues aside, I appreciate where we are and I love this hobby!
Keep flying kids.
I so appreciate these BF 4.5 tutorials! I finally know how to set the throttle value!
It was a good setup briefing with just the right amount of humour. Thank you very much, JB.
You are the Master! When I can financially, I am definitely going to support your Patreon. You're an excellent teacher and instructional videos like these help tremendously. Thank you for your hard work each and every time! =)
Thanks you uncle Bardwell. GPS rescue is set on my new quad, now is time to set fail safe. I love dji fpv emergency button ... finally comming for all
Thanks 😊 was waiting for this simplified setup 👌.
Exactly what I needed! Thanks.
You said the simplest thing, and it made it dawn on me, about putting the GPS on a USB 5 volt rail, especially when using HD. Never even thought to just plug into it at the field, and let that "warm" the GPS up, so the VTX is not running and over heating. I learned something today!!!
Thank you! I've been waiting for this video!
thanks jb for posting this
Fantastic tutorial and testing, Joshua! Thanks a bunch! 😃
But a quad like that I'd definitely put iNav in it!
Anyway, stay safe there with your family! 🖖😊
Wow, thanks Joshua!
This was cool. Thanks. Also congrats on the fria.
This is exciting. Joshua, I wonder if you could do a complete updated video on a GPS position hold mod. I would like to also use an FPV for stills photography.
Thanks Joshua
I don't know what you did for a living before you started CZcams Joshua but you awesome teacher lolthank you for posting all these wonderful how to vids
I have said this for many years. Well said 👏 buddy.
loving INAV
I’ve been using Vifly gpsmate on a few quads that I have gps on. Self powered and it works on getting sats locked without plugging in and not having to use usb. If you have room for it they’re great. Also works as a self powered beeper if you crash and eject your main battery.
Me too. I love that thing.
Great Guy ! Nice and Thanks !!!!
Been waiting for this video..👊🏻
I had issues with my f7 quad falling out the sky during regular flught using 11700 on an m10 gps with dshot 600. Changing to dshot 300 fixed my issue
Yet again, thanks JB. If you get time can you think about this question please:- I have BF 4.4 on my two quads with GPS, both return to the correct point on triggering GPS rescue, but both fly back sidewards....... Any idea why and does BF 4.5 fix this? Keep up the great work mucker (English word for mate).
Ehy jb. Appreciate your work a lot, thanks a million. Can you tell me what kind of facemask you applied on your goggles 2? I have the integra and even changing the pad doesnt fix the issues.
35:00 And a good advice would be to use the GPS-rescue mode in ordinary conditions for a few times till this switch will be comfortable and you will sure where is it. My first drone is now on the bottom of the ocean because I've switched the wrong one in the fog, when just lost the orientation of the drone(
great video and as always i defiintely learned something today!!!!! Stay In the SKYZ Pilots!!!!!!!!!
my fpv hero !
JB - Did I miss the part where you performed the 4th and 5th step under the "setup" section? :
- enable a Mode switch that will activate level mode
- in the Failsafe tab, set your Level Mode channel to activate Level 1 when in Stage 1. This will slow the quad down and level it out in preparation for the rescue.
On the previous betaflight update Me and Droner Boner had a DJI goggles and DJI remote on a 03 unit and unplugged the goggles it went from 2 feet from the ground and flew way out and flew back to crash behind us. Very scary BUT when you done it on a switch it worked perfectly. We only tried this out because mine done the same on a long range flight. I seen the goggles loose connection. It came back in and was doing random hovering stuff till it flew away. I had remote connection the whole time. It would not do anything at all I tried my GPS switch. I tried disarming and everything. It just flew away... I specifically done a GPS test 2 baseball fields away before I done the long range flight. It returned back perfectly on the switch. So of course I felt confident to do the flight.
Hey Joshua, what kind of antennas are you using in this drone? Thank you. Keep up the good work.
I can't wait for 4.5 to officially release
Great setup guide... Once all my setings were dialed in my Chimera 7 lands flawlessly within feet of my take off point everytime. i find myself flipping on GPS rescue just for fun now and watching it out of goggles land like a Mavic.... well with a little more style lol
Did you leave the Aux as FAILSAFE or did you change it back to GPS Rescue.
@@LinhPham-hq4oi I have the AUX as GPS Rescue. Tested with turning radio off as well and returns to home.
So you tested with Aux=FAILSAFE first and the drone returned home. Then you set the same AUX switch back to GPS Rescue.... Fly out far enough then turn off the radio? And the drone should kick into FAILSAFE mode and return home?
@@LinhPham-hq4oi I always had the AUX switch set to GPS Rescue in Betaflight. With TX signal loss or flipping the switch manually the quad initiates return to home.
😢Joshua, you can test out the INAV7 on your quadcopter and I think you'd be absolutely blown away.
The ascend rate and ground speed rate should be adjusted to something that matches a failsafe scenario. Default ground speed is 7.5 m/s. Should be around 30mph or 12m/s for a conservative 7" speed that gets you home but doesn't stress the battery (or do that repeated braking thing that you're seeing). I you're failsafing with a 7", you really want to baby the throttle and not ascend too fast, because chances are you're on top of a mountain, your battery is cold, and you really do not want any sag if you're trying to make it home. Set the ascent rate lower, down to 4-5 m/s instead of the default 7.5.
Thank you for the tutorial. ❤ Do you have any idea, why gps acquision is very poor on btfl4.5? Sometimes on bad cloudy day it might lock 7 sats. But sometimes, even on clear days, gps sits there with zero sats for 30mins, until the lipo runs out. Even with vtx turned off. I know, that I have set it up correctly. In inav I always get no less than 14 sats in 2mins. I have even shielded and grounded gps wires. Btlf is so poor with gps, even on 4.5 version.
Bedankt
I'm the dummy who bought a GPS without SDA and SCL(not realizing), then needing a different fc on this build (without compass pads) thought my only option was the FT EZid. only my second time messing with these so I basically needed to know not all have a compass. that msp protocol seems interesting though.
Can you bind the rescue mode to a button in order to completely shut it off or on if you would failsafe
I also have iflight chimera 7. Would i be able to plug in these same values to setup rescue
Hi. If switching to ANGLE mode in Stage 1 (via Set instead of default Hold), does it have any effect on Stage 2 RTH settings (ie will it be able to reach maximum pitch angle like in AIR mode) ?
I hate waiting for GPS lock when it take a long time. I have found you can warm-up the m10 by plugging power into the USB. Then if you fly soon after it gets lock faster and you don't have to use battery power or overheat your VTX waiting. But how does that work? Is there a battery in the m10?
It seems it would be handy to have a button that could set home.
Does betaflight detect your angle mode switch? you didn't set it on stage 1.
hey can you help me my nazgul 5 v2 binds to reciver but it dosent work on betafilght or irl i connect to reciver but cant control the drone
Did they ever fix gps locking issues?
2:10 My FC doesn't have SDA and SCL marked pads, but there are two UARTs for that. And manual for this FC have information where to connect your SDA and SCL wires, so it's not really true.
For comparability, does this mean I need to update my FC firmware on 4.5.x? In addition to Betaflight 4.5?
Thank For your vidéo. It s the same for Walksnail vtx because i have problème to fix GPS with Walksnail vtx in betaflight 4.4 and all information of gps in osd . I see your video on This problème but all persiste 😢
Im awaiting a JB video next for "how to export the GPX file in 4.5 and use it to do map overlays" please and thanks!
Galileo is the name European Union satellite consolation with 24 operating satellites as a posed to the USA satellite consolation called Navstar. Also, with 24 operating satellites. So, with it on in betaflight, it gives you access to 48 satellites instead of 24. I'm not sure which ones do or don't, but the gps unit has to be able to receive the signal from the galileo satellites, or it won't work. HDOP stands for Horizotal Dilution Of Precision.
Joshua, in the current implementation it is impossible to set the compass to the correct position; when checking in the configurator, the copter model always twitches with the default value and tries to turn around if the correct compass position is set
Hi JB. Have you messed around with the gps rescue velocity pids? My Chimera 7.5 has a nasty vertical/pitch during the return flight. Apparently, messing around with the "gps rescue velocity" PIDs helps to fix this issue.
First thing to do is make sure your GPS is operating at 10 Hz. If it's a 1 Hz GPS then that explains the issue.
Thank you I’ll verify the gps freq.
@@JoshuaBardwellyes it is set to 57600 in ports tab
Could anyone share their PID tuning preset for Chimera 7 Pro V2 in Betaflight 4.5 RC4? Is it anyhow different from the iFlight old preset for Betaflight 4.3.2? Whether Betaflight 4.5 have any significant changes that require doing PID tuning differently?
Hi Joshua
I saw you updating the chimera to 4.5
Did you fly it on the stock pids
Or did you use the iflight 4.3 pids from iflight
Thanks for your time
I used stock PIDs.
@@JoshuaBardwell thanks!!
i have a unrelated question about the 03 air unit iv watched your videos on it but im still having problems with a bad rx warning and ill also just fail safe outta nowhere even when im ten feet from the quad thanks in advance
BADRX means the receiver signal went away, and then when it came back the arm switch was in armed position. This would happen if the armswitch was in armed position on powerup, or if you had a failsafe during flying.
Interestingly, Ardupilot has a known display port issue where the arrow is directly opposite. Is BF using similar code segments now?
This is a font issue with AP and BF using opposite facing arrows for the same characters ( and Goggles 2 using hard coded BF font for its custom OSD). There’s an option to fix that - OSD_OPTIONS bit 5 is TranslateArrows.
Do you leave the Aux4 switch as FAILSAFE or do you change it back to GPS RESCUE after all the final steps?
Probably I would change it back to GPS Rescue.
Does disarming reset the "maximum height during flight" value? Because if it does, then if you use "set homepoint once" you could fly home too low or something.
That's a great question and I don't know the answer for sure. I would guess that it does, and each time you re-set the home point, you also re-set the max altitude. But it's a pure guess.
@JoshuaBardwell At stage 2 settings at altitude mode you can set altitude at fixed altitude.That way the return altitude will be fixed at the desired value always.
If I use pre-arm, do I need to set that in the Stage 1 Modes? Or is it smart enough to failsafe/rescue with a pre-arm configuration?
Yes it's smart enough.
Does anyone know which foam he is using with the his goggles 2??
Is there a way to set the behaviour with a switch? for example when I know I'm flying in an area where I dont want gps rescue to happen it just disarms but when I fly in an area where it would be safe to have it on, it's on. Is there a way to do that?
No that's not possible.
Is this a grasshopper you are holding in your hand, JB?😅
I'm running version 4.5RC3. I'm getting some satellites saying "locked" and some say "fully locked". Does anyone know what the difference is??
What is the reason to use BF4.5 rather then Inav for a LR quad? I have no Inav experience but heared that it works just as wel.. and can hold attitude.
For a LR quad, iNav may be preferable. Betaflight has better acro performance, as well as some features that iNav lacks.
Can u explain failsafe settings for elrs module or transmitter
What we need for r2h to work
Sir i download betaflight configurator but i can't open it in my PC.please give me detail were i what file i open it. Thanks
Hey JB, what's with O3 bitrate? Dropping to under 20mbps few meters from the goggles?
If I was disarmed, it's because it's in low power mode.
I need helo bardwell, I got a vista unit and realized the newest firmware allows the rc2 remote but not the v2 goggles but rollback a firmware u get v2 goggles and no remote, is there any way I can use both?
Get an o3 to use both, with vista, not possible
@TheCatFather01 dang, I knew I should of done that from the git go but I seen somewhere the rc2 worked and automatically thought the v2 goggles would work so I got a vista polar and a pavo20 and got it all soldered up and put together and go figure theyte aren't compatible lol I feel dumb now, I could of sent the vista back and got a 03 for 190 and been set lol live and learn I guess, I'll just get a elrs remote and roll back the firmware for the v2 goggles to work again and forget about it lol
Hi Joshua, I have discovered a problem with BF 4.5.0. After updating from 4.4.2 to 4.5.0, the symbol for the number of satellites disappeared in my V2 glasses. However, the icon for the satellites is displayed in the OSD tab. Unfortunately, I cannot solve the problem. Do you have any ideas? If I go back to 4.4.2, the icon for the satellites will be visible in the glasses again. Many thanks in advance and best regards, Sascha
Does Betaflights GPS Rescue even take advantage of a compass if you got one?
Yes.
There is no interference from the electromagnetism of the motors, battery in the compass?, this happened in the old F330 and F450 drones.
Yes, there is such interference. Unless you can put the magnetometer some distance away from the motors and antennas, it's not very useful.
Isn't a barometer better for the auto landing? Betaflight should use it like inav does
It uses barometer if there is one.
Can i do this to my defender 25 its got gps
hdop seems to have changed to pdop in final build
When you are testing GPS rescue you flip a switch to turn it on and you flip it off to retake control. But if it really fail safes how/when do you get control back?
When you regain link, you deflect the sticks past 25% to retake control.
@@JoshuaBardwell Waggle the sticks. Ok, got it. Thank you. It isn't something you can really just test and experiment with. Maybe set your TX to 25mw and fly behind some buildings to trigger?
I have a weird problem. I set it all up as described in the video, then, when I simulated the failsafe by a flipping a switch the quad went into GPS rescue as planned, however, it didn't let me deactivate the failsafe by switching back. It kept flying back and crashed into my house because I launched too close (didn't intend to let it auto-land). What can be the reason that I wasn't able to interrupt the gps rescue?
After you kick out of GPS rescue, you must deflect the sticks at least, I think it's 25%, to get control back. Did you do that?
@@JoshuaBardwell I waited a little to see if it works, then I flipped the switch back to take control, but soon I saw it didn't respond to my input. However, I'm not sure if I moved the sticks far enough to deactivate it. I'll test it again on a meadow where it can't crash into anything in case it insists to fly back!
Anyways, thank you Joshua for your amazing tutorials! You are the best!
I thought betaflight heading was done automatically, even with or without a compass, or if arrow is wrong. It is calculating the GPS data if the quad is getting closer or not to home, adjusting angle/rotation/direction in small amounts!?
Heading is reported by the GPS receiver. But Betaflight also estimates heading by integrating the gyro.
Need help MY12, ELRS, I have one speed boat and it flips upside down and I have a recovery boat to go get the speed boat. How do I switch between the receivers?
Model Match: czcams.com/video/3S6eUWCqvUY/video.html
Thank you.
I tried to flash my speedybee F7 mini and BF couldn't detect my gyro or accelerometer forcing me to revert back to 4.3. Is the any reason it would do this. Correct target was auto detected prior to flashing
Usually it means wrong target was auto detected/selected. I know speedybee recently tested all there FCs with 4.5 and they were good. So id reach to speedybee support, providing all the information
@@IvanEfimovLimon ok will do. Thanks
what is that battery name pls
Where i get the purple lanyard like you used?
It was a giveaway item at Rampage.
If you lose a few satrlights going under a tree will it just drop if using gps as a failsafe ?
Yeah i think it might have to .
So just stay close under trees ? Dont pick a tree near the edge of your control link range and go under it
hey i didnt get why he tested the stage 2 landig mode, can somebody explain it ?
Don't just turn on "Use Galileo". I've had some GPSs that don't work when it's turned on. If it works though, afaik you should use it
how does the quad know the altidude. My baro is reading anything between 0 too 600 feet while I fly at like 20 feet
Maybe you conformal coated your baro by accident? You can enable baro on the sensors page in BF Configurator, if it drifts a lot while the quad is just sitting there, the baro is defective.
no I have taken real care not to conformal coat it. :(
Why not merge Betaflight and iNav?
why did my osd tab disappear?
I've got mine performing pretty good. But, it's VERY jerky lol. played with many settings and still odd decent and RTH.
On BF 4.5?
@@JoshuaBardwell Yeah I updated my 3.5in Volador. It's better than 4.4 but still almost like "pulsey" even though it returns level... like every 25-30 metres it kinda levels then tilts to gain speed again. same on landing as I hear in your video. it's not a smooth decent it's blipping throttle and "stepping" downwards
@@JoshuaBardwell I should add from my proper profile. Like you the engagement of RTH on 4.5 is much better. Accuracy is also incredible.. Last week in testing I put on a small signs shadow on the concrete, 3 flights 3 RTH and landed within 10cms each time :)
Hi guys! I found the reason and I'm on my way to fixing this pulsating / stepy behavior on my 3" and on my 3.5" cinewhoops: The solution to this is to tame down "P" and "D" parameters on the two GPS Rescue exclusive PID loops! Yes, there is a PID loop devoted exclusively to throttle management during GPS Rescue climb and descend and there is another PID Loop just for managing pitch + throttle for controlling velocity during GPS Rescue return to home flight. I learned two hard truths about those: 1/they are completely independent of regular Acro PID parameters and 2/BF defaults may be good for 5" and larger, heavier drones, but are terrible for smaller, lighter drones like 3" cinewhoops... I came down from the original (gps_rescue_throttle_p = 15; gps_rescue_throttle_i = 15; gps_rescue_throttle_d = 20) to the values I'm playing around now of gps_rescue_throttle_p = 10; gps_rescue_throttle_i = 10; gps_rescue_throttle_d = 8 and behavior is not quite perfect yet, but did improved a lot! Check current video here: czcams.com/video/BwdnEc3Rqds/video.html
Still not getting .. what is better in 4.5
Many bug fixes and performance improvements. For example, 4.4 did not auto configure m10 GPS so baud rate was not adjusted and update rate might be 1 Hz, resulting in jerky RTH flight.
@@JoshuaBardwell that jerkey rth with 4.4, I thought I made some mistake in setting
Great if fixed, I will test soon
In the middle of the video, a mark appeared on the head from a successful GPS RESCUE?
set osd_gps_sats_show_hdop thanks for reviewing this!