Express LRS Link Telemetry • How-to Setup Your Radio Correctly

Express LRS is amazing RF tech and EdgeTX is the perfect ground based companion for an ELRS radio system; however, there's more to the RF Link Telemetry settings than you probably think. Let's get under the covers and sort it out.
UPDATE: Sorry about the math typo on the 100hz Packet Rate LQ10% line. It is indeed 10pps, not 5pps.
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#RCVideoReviews #EdgeTX #ExpressLRS

[@vuchuong74]

I watched this three times and now understand all if it. Excellent tutorial. Your advance warning setting is very sophisticated. 👏👍🏼. I'll set my radio at basic level warning 😅.

[@RCVideoReviews]

I have every confidence the basic setup will serve you well.

[@SOKOL60A]

Такого наглядного и доступного объяснения необходимости Знать!!! о связи RSSI и RQL я не встречал. Пожалуйста, Продолжайте вести свою разъяснительную РАБОТУ!! Such a clear and accessible explanation of the need to Know!!! I haven’t seen anything about the connection between RSSI and RQL. Please continue your outreach!!👌👍👍

[@RCVideoReviews]

Will do. Thanks for the comment.

[@butena55]

Thanks for the extremely understandable explanations on the subject of RSSI and RXQL. The 40 minutes of concentrated listening were really worth it. 'This is the only way to understand and comprehend the meaning of the many entries in LS and SF. It doesn't get any better! In the end, with the TX and RX switched on, you can see the changes of G3, TPWR, RSSI, etc. directly in the telemetry window if you go in another room that is separated by thick walls. Chapeaux!!!

[@RCVideoReviews]

You are welcome!

[@Legalmachinist]

Most excellent tutorial. Now I have more aspects to program - thanks for providing the detailed instructions. Will be nice to really understand where I am in terms of link quality and strength. Yet another reason for graduating up from Spectrum to Radiomaster and EdgeTx.

[@RCVideoReviews]

Glad it was helpful!

[@f0xvibes]

best tutorial about elrs lq rssi. thanks for sharing all this important information. learned alot over elrs and logical switches.

[@RCVideoReviews]

Glad to hear it! You're welcome.

[@robertwasha7234]

Just finished swapping out current xfire Rx for ELRS. This is information is most useful to reset the warnings in OpenTx. Thanks

[@RCVideoReviews]

Glad it helped. I'm in the process of converting everything to ELRS right now.

[@propsoff]

I have already filmed a video of swapping Frsky to Expresslrs. I really like how you put this information together. I want to post a link to this in my description. Really great work John. And of course, I SMASHED THAT LIKE BUTTON..! Enjoy the Breeze...👍🏻🍻👊🏻

[@RCVideoReviews]

Appreciate it. Thanks!

[@CCWSig]

Thank you for saying it like it is! Packet rate and refresh is such a peeing contest, when in reality it doesnt matter.

[@RCVideoReviews]

You're welcome. Same thing with resolution btw. Some believe 11b/12b is necessary and it just isn't.

[@alantoseland6629]

Very good and very interesting, keep going John

[@RCVideoReviews]

Thanks, will do!

[@pofotiouzois]

Very informative and helpful video. Thank you

[@RCVideoReviews]

My pleasure

[@MICHAEL-RC]

Thanks for sharing your beautiful Information It's very helpful

[@RCVideoReviews]

It's my pleasure

[@jlarson42]

Very interesting and informative video. Learned a lot. I was doing it wrong. New to elrs, mostly run crossfire. Happy flying everyone. 🤓

[@RCVideoReviews]

Happy to know it helped. Thanks for watching.

[@paolo9535]

one more "clear as a crystal" tutorial and you can do step by step with the radio on your hands !!

[@RCVideoReviews]

Glad you found it helpful. Thanks for watching.

[@KCQuadTronX]

thank you forthis it has helped me big time

[@RCVideoReviews]

You're welcome!

[@0xphk]

That was very helpful, thank you

[@RCVideoReviews]

You'r welcome.

[@ibiza1975]

Great video !!!Thank you !!! You helped an elrs newbe ....

[@RCVideoReviews]

Awesome! Glad to help.

[@kenn6612]

This is great, thanks!

[@RCVideoReviews]

You're welcome!

[@felixFPVDrone]

Thank you, thank you, and thank you!!!

[@RCVideoReviews]

You’re welcome!

[@sunsetpark_fpv]

Holy shit. This is the ELRS RSSI/LQ BIBLE. This is the HOLY GRAIL OF RC LINK INFO 😎 If you are into RC, and you are interested in HOW YOUR RC LINK WORKS, you need to watch this video. PS - If you are into RC, and are interested in SETTING UP AN ALARM or UNDERSTANDING GLOBAL VARIABLES, and how to set them up, you NEED TO WATCH this video. OK - now I can go back and watch this video again. Thank you for this one! I have been a sub for a while, but have just recently discovered HOW DEEP THE RABBIT HOLE GOES 😎 I will be combing through your archives....

[@RCVideoReviews]

Thank you. Nice comment.

[@nathangerard8465]

Trying to apply this to FrSky RX8R Pro RX. Telemetry is + in my TX data. Shows RSSI as around 100dB not a negative number. TQ is the same a positive number. Both numbers go down as you distance grows.

[@upyopyo]

sorry if you already explained, but I wonder if EdgeTX has a frequency tuning for ExpressLRS? I have used FrSky and Futaba on openTX, and they need to do a frequency fine tuning. Otherwise, a transmitter will lose their signals in a short distance. Also do you have a video explains throttle setup? Motor will start running by throttle range 1600-2000 so that a half of stick range is wasting. Thanks for your assitance, in advance!

[@BrunoB99]

Thanks for that video. Just to confirm the values for the basic setup, even though it's called RSSI on the EdgeTX telemetry screen, the low and critical values represent the link quality?

[@RCVideoReviews]

Depends on the protocol. For ELRS, yes, it's LQ.

[@VernStarr]

I'm curious about something: in your "Top 10 ELRS Tips and Tricks on EdgeTX" video, it says to set your RSSI low alarm to 75 and the critical to 65. This video says to use 50 and 20 instead. KZbin says both videos came out "about a year ago" so it seems like they must have been created in the same timeframe. Which set of alarm values is more preferred? It's ELRS and I don't think any of my FPV flights are really pushing the envelope, but it would be nice to have the best settings just in case.

[@riverdhan]

how to show that info on my tx16s display? those power etc

[@kool-k-kel]

Great vid, would the settings be applicable to crossfire..any major differences. Thanks

[@RCVideoReviews]

ELRS uses theoretical sensitivity limits. Crossfire uses 3 RF Modes. So if you can mesh those together using the logic I showed, it should give you a working arrangement. I'm not sure if they report RQLY as the Telemetry sensor or not. Might have to ask the EdgeTX team about that one.

[@kool-k-kel]

@@RCVideoReviews thank you, more investigating i guess. Cheers for reply! :)

[@alantoseland6629]

Hi John, please could you clarify one thing for me please. If I don't use AUX1(channel 5) as a arming switch will dynamic power still be an option, thank you

[@RCVideoReviews]

That's a trick question: It will be configurable of course, but as I understand it, will not be turned on until the Rx is armed. You can get around that my putting power on your arming switch.

[@alantoseland6629]

@@RCVideoReviews more or less what I thought, more I read more confusing it becomes . Thanks John

[@BBFPV]

I am too lacy for all this, i think i will set "if RFMD

[@RCVideoReviews]

RFMD

[@flyingmonkey3822]

If RQLY < 20, decrement packet rate 10 hz every 0.5 second. If RQLY > 50 increment packet rate until max = 333.33 hz (does anyone have a script to do this?)

[@james66872]

Why don’t you have 1.2 thousand thumbs ups

[@RCVideoReviews]

GREAT question!

[@16-BITFPV]

I'm still trying to get RSSI working on FrSky in my OSD 😂🤣 I might as well just turn it off at this point.

[@propsoff]

I have a video on that, lol

[@16-BITFPV]

@@propsoff Thanks I'll give it a try. I'm not sure what value it's reading. It starts at 67 and ends at 59 almost like a voltage or something. I have a BetaFPV 1w module so I'm going ELRS soon. I need to pick a receiver and order it.

[@propsoff]

@@16-BITFPV I have the HappyModel ES24TX Pro and a couple built-in spi/elrs plus two EP1 receivers in testing now. So far, I'm very surprised the hype is real...🤯

[@mikehoffman9119]

I'm still stuck on GV setup....I have everything else copied from the Advanced setup (props on THAT thinking)....I'm a noob with the radio programming....

[@mikehoffman9119]

I don't understand how it defines GV 3 .... I have it functioning properly now but still confused on how it works utilizing GV 3..... Somehow it just automatically knows?? Or are you using it solely for the purpose of creating the Alarms? I THINK that's what is going on correct? I set GV 3 to min '-130' and max '0'....As I stated, it's functioning but wanted confirmation that this is the correct way....Thank you for passing on the knowledge

[@RCVideoReviews]

See this section of the video: kzbin.info/www/bejne/qZ2ZaXxjgtR9b7M The special functions set the GV value. It doesn't matter if you use GV3 or GV1 or GV6, just use the same one for all of the logic.

[@madladdan]

Does ELRS have gps telemetry?

[@RCVideoReviews]

ELRS uses a bidirectional serial protocol which supports telemetry from certain devices. Betaflight/iNav/and certain Matek boards all report telemetry via ELRS.

[@madladdan]

@@RCVideoReviews Thanks!

[@gregorydahl]

Arf mode 95 .

[@BrainDeadEngineering]

telemetry lost - telemetry lost-telemetry lost-telemetry lost-telemetry lost cant take it anymore, Only way out is model setting, telemetry and delete the ones I don't care about . Then then when I reboot for new fly the list is full and again and repeat the delete. anyway around this Sir .

[@RCVideoReviews]

Do you have discover new sensors turned on? That's the only way a deleted sensor can come back. Also, did you set your telemetry rate to standard ELRS settings?

[@BrainDeadEngineering]

​@@RCVideoReviews Oh dear Is that what it may be ? my bad ! yes keep it on, thought if off all goes dead ?( I sat on my tailgate last evening staring at tellm screen, was full loaded but watched tellm like, pitch, roll, FM and such blinking on and off red text lines and women in radio yelling at me lost-telemetry lost-telemetry lost . So what do I do? click explore telemetry , then delete from list what I don't want and then turn discovery off , and that sticks on reboots , when I load another brick on vehicle ? "did you set your telemetry rate to standard ELRS settings? " I have 1.28 set in ratio ? Whats crushing is the critical telemetry I wanted is LQ levels never shows, oh it shows but never a value . But I have a F405 mk2 FC and people say telemetry feeds are sketchy . I'm sorry ! I only flew PPM drivers for a small time so this new technology has still got me on my toes but I lover learning and keeps young, I am old. Thanks for using your personal time to try help the masses btw

[@RCVideoReviews]

Yup, don't leave discover sensors on. It will simply replace what you delete. Also, make sure the Tx and Rx aren't too close together. That will cause swamping and other issues. Good luck.

[@chiefersutherland5609]

mindbending. this is brilliant stuff