HDZero FPV Goggles Crossfire Warning - 868/900Mhz RC May Be A Problem

HdZero Digital FPV Goggles 900Mhz Warning Crossfire & ELRS May Affect Them
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[@erikj5626]

Glad I use DJI Goggles 2 and TBS Crossfire and never had a problem 👌🙌

[@maxun1]

Me too.

[@skvaderfpv]

Same

[@TechnicallyTom]

The Avatar goggles had a reboot problem when they were released. I have to wonder if this contributed to that. The original issue seemed pretty random. This should give us at least several months of watching really smart people argue over who is at fault.

[@Chillin-fpv]

That's the scariest thing that can happen flying fpv. Video cuts out randomly when flying. And it's happened to me about 5 or 6 times. Mostly caused by a loose wire or jst plug. Then you don't trust your quad anymore for a while. It just sucks so much.

[@TheCivildecay]

yup I had the same with my skyzone 03O goggels.. it would just shut down mid flight from time to time (the motion detection was broken, and it would go into sleep mode after awhile because it didn;t detect any motion)

[@Chillin-fpv]

@TheCivildecay oh damn. I have the same goggles. I hope this never happens to me lol. That sucks I'm sorry. My 03o have been great so far. I wanna get the 04x I think it's called the newest ones they make but they're so expensive. Goggles are the most expensive part of this hobby which sucks.

[@likwidkool]

I had that issue with my DJI V2. I think it’s finally fixed but I still don’t trust it just yet. Lost quite a few parts from disarming over asphalt.

[@TheCivildecay]

@@Chillin-fpv I just turned off the auto-sleep/power off on the goggles and never had the problem again

[@Chillin-fpv]

@TheCivildecay good to know. I don't have that on and it sounds like a horrible feature lol

[@IanF-FPV]

My Crossfire micro v2 at 1 watt also causes my GFCI in my house to go crazy and trip open. If I wasn’t paying attention to the light on my freezer I would have had a bunch of spoiled food.

[@chaotix777]

Confirmed with ELRS 1000mw on a hacked R9, same behaviour, reboot to stock loading screen.

[@breakflight]

Wow. Logical, but unexpected. Glad I switched to ELRS about the same time I switched to HDZero.

[@disco.volante]

Yeah, if only 2.4 GHz LoRa had the same penetration as 900 MHz. When flying in the mountains Crossfire is much more forgiving when descending accidentally out of LOS.

[@breakflight]

@@disco.volante everything else being equal, 900mhz will have better penetration and a slower rate. For how I fly, 2.4 ghz has more than enough penetration for me, but I'm keeping my crossfire in the drawer in case my situation changes.

[@MCsCreations]

Wow... That's some scary sh*t right there! 😳 Thanks a bunch for testing it, Ian!!! Stay safe there with your family! 🖖😊

[@h2o40fpv]

Ian thank you for an excellent video and for the tip on the behaviour that the high frequecy is doing to this two goggles thank you.

[@Migueldeservantes]

very down to earth.... it requires real common sense... thank you for taking the time...

[@asyncnomi]

Thank you a lot lan for informating people on this issue, it is unexpected and need to be known :)

[@gmivisualsjason3729]

This is fascinating...... Excellent information Ian

[@jaysonrees738]

That's pretty wild! I knew that Crossfire could cause some interference in that system since I saw Giant Ant Cowboy flying up a mountain a couple years ago, but rebooting the whole darn thing is wild!

[@WildpixFPV]

Great helpful video, thanks Ian!

[@timechaser4313]

I tested this on the original shark bite goggle module that was sold. Connected to a pair of HDO2's it kicks the module off, but the goggles stay powered up, so the HDZero system comes right back. It also does it with the original power cable that shipped with the goggle module. And the 18650 battery case, with a barrel cord connected to the balance plug of the battery case.

[@snviper]

I have had this for months and couldn't figure out why. Never while flying always while setting up and the cable would touch the Tango. Drove me mad and I thought I had to return my goggles. Until I finally figured it out about a month ago. I use a head pack now for my goggles.

[@KCQuadTronX]

GREAT VIDEO!!!! SO MUCH info as always and so great to watch yuor content

[@dodgydamosfpv9734]

Gonna test it out on my ws module great video 👍

[@StacemanFPV]

Crossfire regularly interferes with the speaker on my taranis.. just like cell phones and speakers on computers used to interfere

[@MadRC]

To completely mauled the Audio to. Honestly what the isolation has done in resolve in incredible.

[@jackman933]

I have had this happen with my WS VRX. I thought It was due to low power on the goggle batt but its really likely that my vertical crossfire orientation mixed with the google batt I have in my pocket and the cable running up to the goggs. Hard to not get them close unless I run the power cable down the back and into my back pocket! Really interesting discovery, Il try be much more careful in the future! Cheers for the PSA

[@canigetachannel]

Thanks Mads Tech ! Cheers Mate ! Peace!

[@canigetachannel]

I really appreciate you finding what could be a serious issue and it offers Carl the opportunity to alleviate it. I, for some reason [luck?], have not experienced this failure just yet. Development requires feedback, and that's exactly what this video offers. Excellent Work, Ian! Thank you.

[@richardamiss7000]

It's actually quite likely that you could get the TX close to the goggles if you are doing Ardu or inav autonomous flights and just using the goggles to output to a screen.

[@Flumphinator]

I would love to see a quick test with a ferrite choke on the power cable. I’m not super worried about getting the remote too close to the goggles, but the power cable is interesting.

[@MattBalder]

That seems like a great solution if it works and perhaps easy to clamp on existing power cables!

[@Rocketyfox]

Kinda glad i havent switched off analog yet, i have a bad habit of scratching itchy spots on my head with my tx antenna while flying...

[@snviper]

Oh btw when I run Tracer on Ludicrous the HD Zero goggles are almost unflyable. No reset but bad breakup. The shark byte VTX never did that.

[@hoagietime1]

On fixed wings if you don't twist your servo leads especially with digital servos crossfire will make your servos go nuts

[@Sugar_K]

You can hear mic noise in the 250mw as well

[@stst8301]

Bravo

[@MattBalder]

I'm so glad to learn this information! Every few times I would walk back from the starting blocks with my goggles powered up my battery cable would bump my crossfire antenna and when I get back to the Flight line my goggles would be hung up on the start screen and I'd have to reboot and I was like what is going on! Now It all makes sense. I found some tinned copper braided wire shielding sleeve ground straps that you just slip over your existing goggle battery DC cable and am thinking of just trying that. It lists as blocking EMI RFI and ESD interference. Thoughts on using something like this?

[@carlosr.2027]

Did it work ?

[@MattBalder]

@@carlosr.2027 I just installed the capacitor on the power board switch and that fixed the issue. I had limited success with the ferrite beads so decided to do the mod. Never got the cable shield. Definitely wasn't easy but with a fine tip tweezers and fine tip solder insert it worked out.

[@Flumphinator]

I always thought it was kinda funny how you can hear ELRS in some Bluetooth headphones at certain power levels when you get real close.

[@SunriseWaterMedia]

Very strange. Interesting info.

[@andrewjamez]

Anything 900mhz will interfere with servos as well if tgd antenna is placed the the servo cable in a parallel orientation

[@franciscfpv]

Walksnail , Tested 2w crsf, 1w elrs image clear fan changed speed a little

[@skysailorfpv]

Don't be afraid of Crossfire's pure power that's all it is TBS power, maybe I have never had this problem because I run my power cable down inside my shirt to my pocket and also, I don't fly with my radio touching my goggles. (pure crossfire power)

[@breckfreeride]

Just get dji... great match for the crossfire power and range!

[@overbese]

So I should put a high gain very directional tx antenna on my crossfire so I can reset stuff "accidentally"?

[@snviper]

No, just don't touch the tx to the goggles. Needs to be really close. Route your power cable differently or use a head pack and you will be 100% fine.

[@MrJarrod]

Elrs is your only options , this happened to me even at 25mw . I sold all my Crossfire stuff when I discovered this myself sadly.

[@Vousie]

I think people have had it happen with 900 MHz ELRS as well. I would expect 2.4 GHz ELRS to be fine, though.

[@MrJarrod]

@@Vousie had no issues yet swamped my fleet to ELRS 3 months ago and even at 2watts no issues , very happy now.

[@tubsucks]

hm.. I normally fly on 1watt but dynamic power and lucky enough never had this issue

[@tk-maker]

all our team with 2.4Ghz , they didnt complain anything yet, will it affect HDzero?

[@warmfreeze]

hmm..i kept having issues with my walksnail video signal basically halving whenever a friend of mine would come out and fly with me.. i am on ELRS and he is on crossfire.. we kept thinking it was just our walksnail systems interfering with each other even tho where were on complete opposite ends of the channel band.. and when he would be powered down he always commented on how far i could fly with my walksnail compared to him.. this COULD have been the issue all along and we just never thought about crossfire being the culprit.. 800-900mhz band was always difficult to tame with spurious emissions

[@markh8170]

Try twisted pair power cable

[@JustKeepLivingFPV]

Ian i see that your led on the boxer radio is green. One person said it was linked to dynamic power, ive switched it on and off. I just want my led to be blue again😢

[@ForSure871]

I think it’s intern or extern TX. Blue=intern Tx and green=extern tx module

[@olavpettersen9465]

Yikes. This explains... a lot.

[@calif94577]

Could you just line the inside of the HD0 case with shielding tape or something?

[@Flumphinator]

It sounds like the RFI is coming in through the power cable, and upsetting the power requirements of some MCU (guessing on that part). The power cable is acting as an antenna. You could shield your goggles, but the solution looks like using a shorter power cable.

[@Vousie]

7:40 You're saying "absolutely no issues whatsoever" with 2.4 GHz ELRS, but on the screen I'm seeing some large amounts of breakup, which we also saw with the lower power Crossfire right before it rebooted.

[@MadRC]

Ok yes but that’s not doing normal things. In normal flight it’s not affected.

[@Sugar_K]

What antennas are those at 07:32

[@mark6302]

well that's scary.

[@vk2icj]

looks like front end overload

[@jurijmonzon]

Does this happen if you disconnect patch antennas as well?

[@MadRC]

Yes.

[@richardjohnson2331]

Is it possible a ferrite bead on the power cable could help?

[@MadRC]

Yes this is something I want to test.

[@markh8170]

Or twisted pair power cable

[@snviper]

Just use a head pack.

[@Sohail187]

Brother! Mads Tech, when we getting the update video! on the dji o3 ham file hack not actually increasing vtx power!. Relying on your to save us from this 25mw shenanigans!

[@MadRC]

I have said already on day one it’s comparable to FCC. I never said it was more power. However there are many things on O3 we still don’t understand

[@Sohail187]

@@MadRC ah my apologies I must have misunderstood :( Hopefully one day in the uk we can get more than 25mw out of this lovely system.

[@MadRC]

@@Sohail187 in the U.K. it gives you FCC power. It’s just it does not give more than FCC like 1200mw So in FCC regions Ham is same power more channels. In CE regions ham give FCC power and more channels.

[@Sohail187]

@@MadRC Thank you for taking the time to respond btw. Love your work and been subscribed a short while now, and you genuinely help a lot. I'll need to take a deeper dive into it then and see what the issue is. Unfortunately on my end SD logs only show 25 MW output, where I believe it should be around the 700 mark.

[@Acestrex]

I wonder if express lrs 900mhz does it to.

[@MadRC]

It does. Been confirmed.

[@testpilotian3188]

Would be interesting to see if this happens with ELRS at 900mhz.

[@MadRC]

I’m fairly confident it will just based on the fact the RFD900 did.

[@testpilotian3188]

@@MadRC what about a Tango 2? Seems a bit of a shame for HDZero for this to happen.

[@MadRC]

@@testpilotian3188 I would expect it to be exactly the same. The real warning is battery cable. Keep it away and should be fine.

[@MadRC]

Just had it confirmed on ELRS 900 as well

[@asyncnomi]

It does some other guys tested it on the discord server

[@chrxst_fpv]

How did you got live video out from dji goggles into iphone?

[@MadRC]

The fly app allows this on O3

[@chrxst_fpv]

@@MadRC but from vista only with android?

[@enlightx]

omg the truerc logo is upside down lol hugo crying right now :P

[@MadRC]

Hahhaaa. He needs to make them like the Bentley wheels where the logo is always pointing the right way

[@enlightx]

@@MadRC or gangster spinners like on low riders 😂

[@audiogek]

I just have to comment on that "touchy" USB-c cable. Of all the USB types I've used since USB was invented, the USB-C type have failed me consistently. Literally every USB-c device I've had, have dying USB-c ports and or cables. Where I never had any problem with it's precursors.

[@chickwithstick7695]

Stop running your devices through the wash machine and they wouldn't fail❤❤

[@Poyser1911]

[@josephrsalexander4589]

Crossfire is powerful and works - the interference is the field of awesomeness coming from the transmitter.

[@lunaticfpv17]

just don't take it near a cell tower or you'll lose your quad

[@breckfreeride]

Still flying crsf... you just made my decision. Going to dji

[@Flumphinator]

A much easier and cheaper solution is to just use a shorter power cable. Could probably even just put a $2 ferrite choke on your power cable.

[@breckfreeride]

@@Flumphinator it's just the straw that broke the 🐫 back for the other 2 vs dji. Still rocking laforge on old FS doms v3... from 2015 and I'm just tired on barely seeing stuff. Tired of having to use a base station and 1.2 to get further than a few miles and get even worse picture quality. The range of new 03 air unit and wider view on the Integras will be a huge upgrade. I've lived with the 69mm ipd for a long time even though I need at least 72. The image quality and range can't be matched by walksnail or hdzero and that's really what I want most.

[@ray4lsd]

I dont get why this is a surprise to be honest. Also this is not crossfire specific.

[@onclefly8450]

I never use Crossfire and now ELRS better I have and happy.

[@PhrozenN]

I stopped using crossfire due to that annoying sound coming through the speaker of my Tx16S

[@McDaddy74]

Lol 800 dollar goggles are sheet

[@lunaticfpv17]

Why would anyone be flying hdzero and crossfire? crossfire sucks 😅

[@MadRC]

Hay I like crossfire.

[@Magneticitist]

Crossfire is amazing.. but I don't see why anyone would need to be running it at high power anyway

[@MadRC]

@@Magneticitist yea, there are scenario’s though. The real thing to note is the power cable. You really should never have your goggles that close to the RC but people may accidentally get close in flight and it could cause a reboot.

[@Quad_Father]

Why would anyone be flying hdzero and crossfire…. Hdzero sucks 😆

[@friederek]

I hope this is a trollcoment

[@hirnlegorush]

It clearly is absolutely important to shield your hardware-even if its not sending a signal,as you can see in this case. I absolutely cant stand anymore that people still carrying hdzeros water after this complete shitshow they pulled over the last year or so !!1 I know Carl is a good guy but his product is clearly alpha stadium at best and if it was walksnail with all those bugs and hardware shennanigans people would be all over it shitting on them-rightfully so.But not with hdzero,its always the bees knees no matter what lol People loose alot of credibillity over this in my mind...just saying xD

[@snviper]

I have had zero problems with my goggles since I switched to an 18650 head pack to power them. I do long range flying and trust them completely. Even when I had the problem I never had it while in the air as the cable would then be routed away from the tx.

[@hirnlegorush]

i would call that almost stockholm syndrome...no offense but dude... if i pay that much money,wait months on end for it to arrive and in the end they deliver such a shitshow i would not be pleased to say the least xD

[@snviper]

@@hirnlegorush Oh believe me I cursed a lot when I had the issue and almost sent them back. But since I discovered the issue I did several dozen long range flights and a lot of cruising and some racing and I am very happy now that I do not have this issue anymore at all. I just ordered another set of the goggles for my brother in law as a birthday gift. I try not to be a fanboy I have been in the RC Hobby for 25 years and "seen it all". My next purchase might be O3 and Goggles 2.

[@thewhitedillard]

This is whats happening to everyones brains with the constant bombardment of radio radiation coming from all the electronics ppl seem to think they need in life 😵‍💫

[@johnfaustus1]

Shame on you Mads (I know HDZero is sponsor). This is a board and RF design issue that HDZero needs to fix..."don't bring your TX close to your goggles" is not good enough. What are you thinking? DJI shields and cans their PCB, XTALs, and cables properly.

[@MadRC]

Shame on me? Hahah your Fing joking right 😂. HDZero is not a sponsor. That’s is complete bullshit and I’m not having it. I am the person that highlighted this issue to the masses, I am not covering it up for them. Putting 1W of RF power next to anything is a BAD idea in any world. Now the cable situation is far from ideal and I say that and it’s something people need to be aware of however don’t for one minute it’s a free pass If your putting your radio next to your goggles in flight something is very wrong. Shame on you for posting a frankly stupid comment.

[@martr]

@johnfaustus1, HDZero is sponsor ? You can have your own opinions, but you cant have your own facts. Have a word with yourself.

[@johnfaustus1]

@@MadRCYou don't have to have it - if they are not, we'll take your word for it. Any retort to the substance of my comment?

[@johnfaustus1]

@@martr The youtuber can speak for himself - no acolytes are needed. If they aren't a sponsor, great - but the issue remains. You can't tell people to not use a product in a way that is largely considered reasonable as a 'workaround' for a grave RF design problem.

[@martr]

@johnfaustus1 I agree with you. My comment was about you making stuff up about sponsors to prop your argument up. You are right that this issue needs sorting though.