ExpressLRS has no LQ threshold. really? (How to set up RSSI and LQ warning)
Вставка
- Опубліковано 9 вер 2021
- Uncertain about what to buy? Check out THE ULTIMATE FPV SHOPPING LIST: www.fpvknowitall.com/ultimate...
SUPPORT ME ON PATREON at: bit.ly/2Ep5Sia
THIS IS MY FULL TIME JOB. Here are other ways that you can support me: www.fpvknowitall.com/support-me/
---
Which ExpressLRS module should you get?
• Which ExpressLRS modul...
How to flash ELRS receiver over WiFi!
• You can flash this rec...
How to flash ELRS to your FrSky R9 module and receiver:
• Video
Trying out the range of the ultra-tiny ceramic receiver on HappyModel ELRS:
• Ultra-tiny receiver to...
Can’t stress enough how awesome it is to have someone like you in the community, thank you for your videos. This was very helpful.
What a let-down!!
I was so hyped for your 30km range test to check that your warning threshold worked! 😛
(Good info though JB 😉).
Hey Wez, pls make new long range videos. Love your channel
@@Nici619 new one on the way as we speak ;) Should be up in a few hours :)
@@WezleyVarty thanks man, you saved my Saturday night
30km?!
This will blow your mind
ua-cam.com/video/j2GMtBFDQho/v-deo.html
I’m not really into express lrs but watched it just because you have an awesome way of providing the details and information without sounding like a douché 🙃
I just installed my first elrs module and receiver thank to your comprehensive tutorials! I've never been so fearful of frying things and accomplished when it all worked. Thank you for all of this!
I have crossfire but I watched the whole show and learned something !
Every time I'm like "Hmm, I wonder how I do that?", JB comes out with a video. Thanks!
Very helpful! Just switch all my kwads over to ELRS this week and I feel like I'm covered for warnings now. Thanks!
oh wow what timing! i was literally trying to figure all this out last night! wake up next day and there you go!
Thanks so much for this. You always have exactly what I need to setup. Just setup my BF warnings and RC warnings based on the -10db from min recommendation
Thank you for this video. Finally i can setup my warnings the proper way 👍
Thank you. This is information I've been looking for.
I dont even fly ELRS but thank you Joshua for being the know it all.
Thanks, just used this to set up my new Elrs OSD.
Fantastic, Joshua! Thanks a lot! 😃
Stay safe there with your family! 🖖😊
This will blow your mind
ua-cam.com/video/j2GMtBFDQho/v-deo.html
Ive been using the namimno elrs module recently with my 5" freestyle quad, loving the low latency feel :)
Thank you so much Josh!!!!
Thank you! Appreciated as always!
Thank you, I did learn something today.
Realy good explanation 👍👌
Liked before watching, been waiting for this
What perfect timing Joshua..... I've just been wondering about this!!
What a superstar you are!
Edit: OK so we set it in Cli? Can we set it on our Tx?
For example I often fly different modes... 50 250 500 etc....
I'm glad I saw. I almost emailed you about my DBM values. I'm glad to know EVERYONE has semi low DBM when your literally sitting in the room with the quad! My LQ never drops below 100 for more than millisecond though. Using expresslrs without a lua script is a little iffy.
what vallues are you getting on your bench test, Im getting like -50dbm at 1m, 10mw but everyone on an fpv discord server where telling me that its terrible resutls, one person was even getting -2dbm
@@potater6163 Did you soled the issue?
Thanks!
I made it almost a mile out with my Geprc Phantom and I started to run into some serious control issues. Is there something that I might be missing? And excellent video!
I've been gone for 2+ years, still have my full TBS Crossfire... what is this express LRS stuff lol.... as long as I can still get my LQ and dbm on my dji's ( just watched your other very helpful video on that) thank you so much!!
If future Josh and past Josh ever comment together in a video a wormhole will form in a bando
Great information Joshua. Thanks. I have an analogue Rekon35 ELRS built in connected to a Jumper T Lite. All good even arming works. Just can't seem to get the link quality to display on the OSD (it always says zero with the flashing warning). Where did I go wrong in Betaflight?
I failsafed on an ultra micro long range at almost 1 mile with some trees in the way, enameled wire monopole antenna's at 50mw 250hz. Frsky would have struggled to go a quarter mile in the same situation.
thats impressive
Nah Frsky wouldnt have failsafed Like w.e. it is youre running😂. Jp.. I say that because you dont say what it is you failsafed on....🤪
I watched it because I've learned something
Love the very end. Dad problems 🤣😂👍👍🇺🇸
I did not know about osd_rssi_dbm_alarm or osd_rssi_alarm. Will use that with my crossfire.
I have ELRS on my explorer.. Im thinking of getting and putting it on Rekon6. Just hate buying BNF then having solder and change stuff. last time i couldnt do betaflight passthru till after i solder wires on and put elrs bootloader on
great thx
Ahh it must be a slow subs week he got the baby out 😂.
Some of the 1w modules will not go down to 10mw, 25 will be your minimum.. My readout was -45 to -50 dbm... 25 mw at 1 meters distance, using the wired antenna.. dropped to -65 at about 5 meters away.
I flew my wing 20k out with crossfire on 100mw just to test when it was going to failsafe, LQ was in the low 20's for more then 5 minutes without failsafe. In the summary screen I saw min LQ had been at 4 (probably for just a sec). Flew the wing home safe! 👌🏻 Just test your own setup, it may vary...
@JoshuaBardwell would it be possible to have a tuition video on setting up the radio to read out a link quality please? Previously used your read out low voltage but as link quality is the focus for good connection now, it would be a much appreciated tutorial. I've had a go but not quite figured it out :-)
I’m gonna file that under yeah I’ve heard of that before. Thank you.
900mghz or 2.4?
I’ve been rockin the 2.4 on all my pro working quads for a few months and can never go back. Only thing to beat it so far is redpine for tinywhoop racing but that’s a different end game! I haven’t tried lq so i’ll give it a go! Thanks for the nudge to try it out.
Hmm, I did swap out the FRSky R9MM rx in my Long Range GPS quad. I am curious how I should set up the Return to Home GPS/Failsafe feature now. Maybe just set a switch on the TX to send that command if I think the LQ is too bad? Thoughts??
For Audio feedback from radio. Can I then set up 1RSS with the desired value (-60 dB). And use.LOGICAL SWITCHES AND SPECIAL FUNCTIONS? In the same way as Crossfire.
on my elrs r9lite(with betafpv moxon antenna)+r9mm I can easily get failsafe in 2km flying in Moscow not behind the buildings at frequency of 50hz. On the bench test at 10 mW and 1 meter I get -20dbm. It seems to me that 50 mW which is maximum output power for r9lite is not enough... For now I'm waiting for betafpv elrs 900 MHz module with recievers... Do hope that will solve the problem...
Top 👍👌
I shall endeavor to use my talents, and crash test some LRS devices ...always stick with your strengths...lok
ELRS ftw guys. Hands down.
I followed your steps but I'm not seeing rssi dbm value in my dji goggles (I am able to see my other custom osd elements however). Any tips on what else I could do? Thanks.
I'm still running R9 ... I really should flash with ELRS
Yeah, you should! It's way better then R9 in my humble opinion
Just did that. The process is tedious but it definitely saved me hundreds of bucks from buying a radio that supports ACCESS...
Yes, you should!!!
Or, even better, buy new!
OK, you'll need about 70 bucks but...
RX is way smaller than R9!
Updating is way easier (and I don't know for how long would Frsky hardware be able to update).
"Binding" is a non-existing word in the ELRS world! (you set up RX and TX and as soon as you power up, they will bind!!!
Imo as owner of ancient turnigy 9xr non pro the only thing keeping me with R9 accst is this radio, but still R9 accst 25mw lbt have never failed me, my fpv link is still limitation. The main thing being offered by elrs seems to be ability to turn down smoothing of rc signal, which should quite easily remove few ms of latency.
I’ve just moved to ELRS and have a stalled it in my Baby Croc 5 which came with Crossfire. Can I use the Crossfire antenna (because it fits better with the stock TPU mount) and expect the same performance as the ELRS stock T-antenna?
Thanks for the video! I'm using DJI FPV Goggles and ELRS and using the Aux11 (LQ value) and sending that value to the OSD using the RSSI "slot" or what you fall it. All configured in Betaflight. Is there a way to display the RSSI dbm-value also? As I understand DJI OSD don't support showing that?
With DJI, it's not possible to display RSSI dBm or LQ. You have to pick one, assign it to the aux channel, and use it only. You will still know that "RSSI" is actually "LQ" but you can't see both and you can't see them in correct units.
@@JoshuaBardwell Was hoping you had or knew of a solution. Thanks for the fast answer!
You could however use logical switches in combination with special functions on your radio to give siglow and sigcrit when 1RSS telemetry is < -98db. And crit at like -102 but that's pushing it.
@@JoshuaBardwell I am not clear on how to get any aux channel to show up in DJI OSD, nor how to have OpenTX react/alarm to ELRS LQ or RSSI dBm. My closest guess is that "assign it to the aux channel" is a Crossfire LUA ability, not an ELRS LUA ability.
@@ed_halley If you use the modified version of betaflight that replaces the craft name with the warning text string. Then you can set specific warnings when the RSSI and/or LQ or RSSIdbm go below a certain value. Then you setup OSD warnings to display and these will show up in your screen as a warning. Another way is to setup in your radio in the telemetry tab so that you can create audio warning for singal low and/or signal critical. You will need to play with settings until you are happy. Everyone recommends to place the ELRS to lowest possible power level to help find a floor for the area you fly in to make sure everything works correctly. Then you readjust power levels to normal and you are set.
I suggest performing a walk test to get an idea of how the the LQ and RSSI drop off, but more importantly, how long it takes before the link is re-established. It's easy to do: set the TX to 10dbm and put it in a microwave and then walk away with your quad in your hand and with your goggles until the link is lost and observe how the LQ / RSSI degrade.
I noticed that once the link was lost, that it didn't come back no matter how I oriented the frame. I had to walk a short distance back before the link was re-established. That is a little disconcerning.
Do it quick before your radio melts.
@@thejeffhendrix You're not meant to turn the microwave on 🤣
now you tell me
Hey thank you for your help Joshua. But for some reason my Lq reads and stays at zero for some reason on my osd. All though my rssi dbm is showing the gains and drops. 🤔 I would love to just have the Lq read 2:100 or something but it all stays at 0:0. What am I doing wrong and as for my other quad I cannot seem to manage on CLI command -107 to set my osd rssi dbm alarm as on my transmitter it is on -117 but through cLI command It will only allow me to add positive number for some reason 0-130 I don’t know why. Any quick suggestions. Thank you 😊
I've been experimenting using logical switches and a combination of both RSSI dBm and LQ to have my radio warn me.
Yeah, for RC signal I'd prefer to have my radio warn me rather than OSD flashing 'cause then I can have a voice warning (and it works even if I'm flying LOS).
@@Vousie if you're failsafing los you aren't flying los
@@samsam18200 Well, I had a (dodgy) radio receiver that sometimes failsafed at 200m... Very easy to see a large-ish quad at 200m. 🙄
Antenna placement/fragile antennas can also be an issue.
All I'm saying is it's 100% possible to get a failsafe at *any* distance. Especially if using "normal" links like FrSky.
Why didn't you consider switching the transmitter module out as well while "troubleshooting" your receiver?
I'm honestly asking because I'm thinking wouldn't the received dB get worse on the rX as well when the tX is having its own issues? (meaning if your module had had an issue and you switched it for an undamaged one would the 1RSS also get better?)
Trying to wrap my head around the relation between transmitter RSS and receiver RSS which Crossfire shows for basically every present antenna...)
anyhow, thanks a lot for the insights so far
I do get up to -36dbm on my jumper t-pro (builtin elrs 1000mw) with an RX SX1280 receiver (with ceramic antenna). But my lua script doesn't allow me to set the tx power to 10mw, minimum I can set is 25mw.
If I change the rssi_offset parameter, will it affect the RSSIdBm readings? Or the normal RSSI only?
I have -45 dBm at 2 meters (25mW, 500Hz) but I'd like to shift this reading to 0 dBm.
Thank you. But what if i am using dji goggle with lq dbm osd
IS IT POSSIBLE DUE TO THE TX ANTENNA OF HAPPY MODULE IS VERY STANDART
Hey, when will dji fix problem with v2 goggles activation why in my case dont have in settings about switch to dji fpv system, but im done with all steps, please someone answer
So do I need to update the betaflight version on the quad? None of these setting are available I have rssi and lq that's it.
one question since i dont know why i have an issue: I see at my radiomaster, that rssi and link quality are in a good range an seem to work. when I go far away from my quad it gets lower and lower so that makes sense. But somehow my osd show link quality of 0% and -130 rssi dbm. are there any settings to adjust for this?
3:00 JB, it looks like the EP2 receiver is consistently getting 20db worse than ep1. That might be the reason why you're getting exactly 20db difference. Try with an EP1 receiver.
If you are flying with a servo at 50hz and a link of 100hz speed at LQ 100 you are getting x2 the data to control the servo. At LQ 50 you are getting 50 instructions per a second and 1:1 with the servo at LQ10 you get 10 instructions per second through but unless you are making more than 10 changes per second it should be still flyable. Does this sound right?
I updated my elrs to 2.4 and my lq is blinking.. what do I need to do to get that to work again
Hi Joshua can you do a video on how to set up elrs on the dji system plz
I don't think you can use ELRS with the DJI controller of that's what you're asking.
@@JoshuaBardwell sorry should of explained more, I mean how can you get lq in the dji goggles osd
Hi joshua. im newbee into FPV. just watched your old video where you setup RSSI through open TX on your X9D and sent it as a seperate AUX channel from your TX to RX and From FC you choose RSSI aux to that corresponding channel. do i need to do all these in ELRS too? or just connect in TX RX VCC GND and im good to go?
No you don't need to do that with expresslrs. Betaflight will read lq and RSSI from the telemetry automatically.
You can just single press that "SYS" button to get to tools?
I thought RSSI didn't consider the signal-to-noise ratio so why is it of any use at all? Why not just rely on link quality alone like you would for Crossfire? I appreciate that coming up with the correct threshold is somewhat of a guess as you mentioned, but the same can be said for the 10dBm tolerance that you suggested for the alarm.
Also wouldn't hitting the RSSI sensitivity limit be a much harsher / quicker limit than link quality? Would link quality be more granular where it matters? (I.e. Towards the limit)
LQ tends to stay high until SNR gets low then crater rapidly. So knowing you have strong RSSI is useful. Also why I say any time LQ starts to drop at all youshoukd pay attention.
Once you get to the RSSI dbm limit, LQ drops like a brick with ELRS so you'd failsafe if you didn't look at LQ for a few seconds.
- High LQ & low RSSI = getting to the end of the range
- Lower LQ & High RSSI = noisy RF environment
- Low LQ & Low RSSI = you're about to failsafe.
Also: LQ of 10 with 500Hz packet rate is like LQ of 100 with 50Hz crossfire 🤣 I know it's not that simple but still: 50 packets a second. There's no comparing the two when it comes to LQ.
I'm having a problem with an RX jumper ep01 it's accusing RX Lost and critical signal and sometimes it doesn't even connect with the radio I don't know what to do anymore if possible a help there I appreciate it.
Using ELRS for about a month, great control, unbelievable distances!
One question though...
Is there any way to set a threshold for "if LQ gets lower than..., enable return to home"?
(I'm not referring to a switch on the controller) 😁
I believe not in betaflight. But if LQ is given as a telemetry sensor then you can set that up on the radio to activate an aux for gps rescue. But any reason you’d want that?
ELRS carries lq and rssi as aux 11 and 12. You could tie GPS rescue to that aux channel.
@@gautamkrishna7421 Agreed - when I have a quad with RTH functionality, I'd rather just let it return if it actually failsafes. It's only with non-RTH-capable quads that you'd wanna deal with it earlier.
@Joshua Bardwell shweet! And from the man himself! I was crawling the web for thst exact! Answer, now I can go to sleep. Thanks JB! Running two of your qav frames FTW!
I'm flying behind some trees and my LQ went down to 7 : 30 for a few seconds from around 7 : 98 with Rssi Dbm of -93. I didn't notice any loss of control or anything weird. As I came out from behind the tree it went back to 7 : 98. I wonder if link gets worse will it switch down to a lower RF mode like 6 : 99 or 5 : 99? Or will I failsafe at a low 7 RF mode number?
It will not switch rfmode. Elrs doesn't do that.
Just a question, how do i convert the rssi/lq to the standard 99 like xfire.
It's really better to use RSSI dBm and the X:YY form of lq. They give more useful information about the link. If you really want to make it like old style crossfire, aux11 and aux11 are lq and RSSI. Set one of them as the RSSI aux channel and then use RSSI in your OSD instead of RSSI dBm and lq.
Do you still do this with betaflight 4.3 rc3 and using expresslrs in the tools menu of the zorro transmitter
Yes. Nothing has changed in that respect.
I have no freaking idea what you're talking about but hey. It sounded like you knew what you were saying so YaHOOOOOOOOOOO I WATCHED TO THE END.. HEHEHE
MIKEY
I've seen my LQ drop to 70 on 50meters distance, onboard elrs receiver with ceramic antenna
Is there a way to configure the OSD readout in Betaflight for the LQ display? Mine show LQ 6:100. Whats the 6 represent?
What packet rate mode you're in.
250mhz packet rate
Mine is between -35 - -42dB @ 10mW ~1m away with the happymodel, T antenna - mail you the pic
Edit: T-antenna on the TX side (no EP1) and the EP2. I watched the video and comparing apples to apples
That's pretty common with an ep1 and t style or even dipole antenna and in line with what I see with my ep1's.. JB is talking about the tiny smd antenna on an ep2. I generally get high -40's to low -50's on my ep2's at 1 meter 10mw. I don't even get a little nervous flying until LQ hits and hangs around 50% with dbm in the high-90's. Months of flying ELRS daily with exactly zero fail safes flying ep1 and ep2 recivers, module set at 500hz 100mw..
@@shultz42 T-Antenna on the TX side - NO EP1
@@DM4DS Ah, I thought you meant the receiver side.
For what it's worth, the -45 number given to me by Alessandro was for the ceramic antenna, but I was unable to reproduce it.
@@JoshuaBardwell The ELRS wiki says -30 to -40 for 2.4ghz, and -20 for 900. For the EP2s apparently you should be in the -40 to -60 range because of the "ceramic" antenna according to the ELRS devs I talked to. FWIW I get -50 +/- 3 db on my DIY 2.4 TX and an EP2.
What science is behind the adding 10 to a limit dBm value to get the alarm value? I'd understand adding 6, which means that you still might fly double the distance until failsafe or adding 12, which would tell you that 4 times more range is still available. But why 10? It sounds like an odd number just fabricated out of nothing...
That's what the ELRS devs recommend. Bear in mind RSSI fluctuates a lot especially if you don't have a diversity receiver. But the truth is that's just what they recommend.
I get at 1RSS positive 46 dbm is that a problem?
I keep getting a low rssi dBm warning on my osd while flying with elrs with a packet rate of 250. My LQ also just says 0 all the time. How do I set this up properly?
ua-cam.com/video/LnWdIssBk-c/v-deo.html
What does an RFMD of 9 mean? I thought they only went from 1-7 but my OSD on both ELRS quads I have display '9:100' in the OSD. I should be running at 500hz
7 is 250 so 8 must be 500 and 9 is 1000.
My ep1 -60 to -70 at 100mw 250Hz. Two different quads and never crashed. Am i having a weak stength?
At 1 meter with 100 mW yes that seems low to me.
Here trying to figure out an issue I'm having with ELRS and at the end of this video i'm just more confused than before... I have 2 identical receivers (Jumper AION) 1 has 98-100 LQ at a 1meter distance... the other oscillates between 25-70LQ I inspected the antenna and found that one of the poles had broken so I soldered it back on and the LQ sat at 80-95 for about 10 seconds before reverting to oscillating between 25 and 70. Does anyone have similar experiences? Also if it is just an antenna issue what antennas are compatible with ELRS Receivers?
You can't solder back an antenna wire like that. It's coaxial wire. Once it breaks, it's very difficult to repair correctly. You should replace the antenna. You can buy spare antennas for any 2.4 GHz ELRS receiver and most likely they will all be compatible. I suggest the Happymodel antennas or you can also use IRC Ghost antennas.
@@JoshuaBardwell ah dang it just looked like a solid wire to me it broke on the T section but if I missed the internal element in my inspection no wonder it’s still acting up! Thanks for the reply! I wish I put this Rx/antenna to use when I bought it literally never been flown would’ve returned lol >.< I’m used to Frsky style antennas so these T shaped antennas are new to me, I might look at the Ghost antennas I feel like id trust their build quality more than Jumper / betafpv at this point.
Are this alarms working on dji OSD ?
DJI OSD can only display RSSI not lq. You can substitute lq as rssi though.
Can we put same in DJI osd?
ua-cam.com/video/Oogm72vRclA/v-deo.html&ab_channel=JoshuaBardwell
My ep2 ceramic antenna fell off one of my recievers
It would be nice if someone finds a way to protect the antenna and shares it... Right?
@@MCsCreations have a 3D printer? Search thingiverse with EP2, you'll find some TPU mounts and covers. Me, I just use clear heat shrink over the antenna and secure the receiver inside the frame. I haven't damaged an antenna yet, maybe I need to crash harder:)
Mine too. Tried to solder it back on and it only held up for a week and I got -90 db and higher while flying again. I had some frsky antennas and I cut off the connector of one, peeled back the ground soldered it onto the ground pad, peeled back the silicone and soldered on the antenna wire. Works great
ha ha
how to show lq on dji googles osd with jumper t-lite
Yo 👊😁🍺
I had damaged after a big crash
Is there a way to get this working on DJI? If there is, I’m too dumb to figure it out 🙄😏
ua-cam.com/video/sYafWt-c7dQ/v-deo.html
Interesting part where you said ELRS LQ doesn’t drop below 99 - 98. I’ve been flying 2.4 ELRS at my local spot for a couple of months now, a spot which I know very well and flew crossfire for 3+ years and I notice LQ fluctuates more on ELRS than it did on Crossfire. In saying that, I still have not failsaved on ELRS and I’m very happy I made the switch. Here’s a little DVR clip of me “scouting the area” and seeing how ELRS performed.
ua-cam.com/video/a0dLJWLNvig/v-deo.html
Well yeah, you're flying at 5 times the packet rate of crossfire. LQ will be a bit more sensitive as it's the percentage of received packets as opposed to sent packets. If you have 2% loss on crossfire (98 LQ), your quad is receiving 49 packets a second. On ELRS 250Hz, receiving 49 packets is only 20 LQ. I wonder if you get the same fluctuation on 50Hz.
@@hofa you’re absolutely right. I hadn’t thought about this. I will try both ends of the spectrum, 50Hz and 500Hz and report back :)
@@STEDDiEFPVand?
Love ELRS. BUT...... here's the whine.... We need ELRS Rx's with PWM output for fixed wing flyers that don't want to use an FC.
how can you get this working with digital fpv dji?
ua-cam.com/video/sYafWt-c7dQ/v-deo.html
@@JoshuaBardwell thanks mate i'm going to try it with expreslrs
I heard the Rotor Risko has no fail safe! And comes with conformal coating.
😅every time I fly it’s a Rotor Risko 😁
A video on antenna orientation would be very helpful, not finding one that’s in depth.
Why when select discover new sensor i can only see 10 valúes?, and i cant see the battery sensor
You aren't getting telemetry from the FC to the receiver. Make sure telemetry feature is enabled in Configuration tab.
@@JoshuaBardwell thanks as always for your time… the problem is the Betafpv AIO F4 built in ELRS you cant flash to newer version yet 🤦🏻♂️
My lq drops down to 80 to 65 after 500 meters? My rssi dbm is good, what can it be?
That depends on your Hz and your output power. If you're running 500 Hz at like 250 mW, that's about right.
@@JoshuaBardwell i use 200 hz and 10 mw, with 100 its a little better but not that much, i have micro failsafe and after 650 meters, failsafe, that can't be normal, i run it on 915mhz?
@@JoshuaBardwell my snr is when my tx and rx is 1 meter away from each other 4 dbm, what could be the problem? that is probably the reason for my bad lq
ua-cam.com/video/s4EcxopG-Qo/v-deo.html&ab_channel=JoshuaBardwell
I love my TBS Crossfire connection more than my wife 👀
me too js
Is your wife's name ACCESS? XD
I lose connection with my wife on low LQ, on CRSF, I don't...
@@13FPV oh I see what you did there...
I'm using expressLRS and my LQ is 8?
500hz at 7% LQ is still 35 packets getting through each second.. so.. jittery, but more than 25hz. 😋
He's starting to believe