What is FLEX firmware, and how to get it on your ETHOS transmitter

In this video we discuss what the FrSky FLEX firmware is, when it was first introduced, and what you can do with it. I then show how to get that firmware on to your ETHOS transmitter. If you want to go back to your original firmware at any time. You can use the same process, selecting the correct firmware for your region: LBT, FCC, or IL.

✈️ Contents ✈️
00:00 Introduction
00:11 What is FLEX firmware?
01:53 How to install FLEX firmware on your transmitter
05:19 Conclusion

Thank you for watching this video. Time is precious, so I hope that you got some benefit from this video. If you have any questions, please leave a comment and I'll do my best to answer. Please try to keep questions relevant to the video in, as they may also help others who have the same question.

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[JDDupuy]

Good video. I use only FCC but this is nice to know how to use the software suite to change firmware if needed. Thanks!

[ericboeckmans]

Great video, as usual. Many thanks Darren!!!!
When Flex is installed, could you please explain what parameters (and where) should be set on my X20S (flying in Belgium) to accomodate 900M at 100mv with telemetry? For the moment I can't go above 25mv as otherwise I'm losing telemetry. I browes internet but wasn't able to find any kind of "step by step" guidelines. I'm really a beginner here. Manby thanks in advance!!!

[vincehogg]

Darren, very helpful series of videos. Thanks. Im still confused about a few things. I have flex firmware on my X20s and a TDMX rx. Tried it at 100mw (868 band). Telemetry range is very poor (about 500mts) but RC signal strong. I dont know if telemetry at more than 25mw is only available with and external R9M module as manual suggests? I think because I set power to 100mw, the telemetry is only operating on the 2.4 band? Dont know if I should get an external R9M or a CRSF. I would like to get mavlink telemetry from TX to a PC. I think the CRSF can do that? Edit anyway the telemetry comes back from RX so surely its more to do with how much power the RX can put out (does it try to match the TX setting?)

[jjames]

Can you do a video on setting up a RB-40 along with a X20s..

I have no idea what I'm doing

[scottydntknow]

I never had an issue where it would say LBT in the suite, its said FLEX since I put FLEX on it months ago. Also for the X20 there is a FLEX antenna available for it so you don't even need to change antennas on the TX. ACCESS receivers flashed with a FLEX transmitter update to FLEX automatically. For my ACCST receivers its LBT which was a little confusing knowing which firmware to flash to older receivers when I first went to FLEX.

[M-H]

My God Darren you have been working out there I see, a virtual Hulk now maybe Mark will do the hope you had a good new years and look forward to 2023 vids.

[FelixTheCat]

You've been going to gym I see, good for you !!

[BhaveshSanganivaayuchaalak]

Just a doubt / Query - We could still use an external module like crossfire, multi v4, etc with the FCC firmware ? Or one needs to upgrade to FLEX to use external modules.

[emecata]

hi how are things? You know, I have been a frsky user for many years, using rx fasst, after having the x18 then the EU version and I want to transfer it to FCC, I know that with firmware it is possible, but should I change the antenna too? I would be very grateful if you could help me. greetings Matias

[Aymarddemeyere]

did you put Flex on your X20S PRO?? theres a map i18n? what to do with this?

[FourthWayRanch]

has anyone tried using their tandemX20 as a controller on windows? I've been using it for MS flight sim but it doesn't seem to pickup any of the buttons or sliders

[josephsaliba]

Afraid of mobile phone towers that transmit on FCC frequency, i.e. 915MHz, I am going to install the Flex firmware so I can change to EU. Do I need to change the antenna inside the transmitter for the new frequency of 868MHz? Thank you.

[aaronwood]

I laughed my ass off when I opened this video very funny thanks. So I’ve been doing some research on mfd min crossbow. I’ve had mine for a while just was saving for winter project. Unfortunately mfd telefly tinny module have a very limited manual they don’t even tell u what the buttons do on the module. So the easiest way I see to get this thing track is to wire tinny into video after f/c before vtx. Tft takes gps info and push’s it down video. So that gives aat something to track. Simple enough. Now I like inav osd tft has osd to so they say I can use any osd as long as line zero is open for tft to send gps data. Was just woundeing what u know about aat and inav any tips or suggestions be greatly appreciated thank. Steroids shrink your wiener that’s why I never touched it I’m bad off in that department lol I think I have everything ready to go ground station is ready gonna wire up tft today so we see really hope it works I would really like to move to 1.3 vtx but not sure how well that’s gonna play with crossfire maybe ok have more separation with antennas have a few different notch filters. I’ll get 5.8 working first may not need to switch would be nice to have the penetration of 1.3 but I was getting good range before with 5.8 8 miles with 13dbi patches on goggles. I really hope 6.0 is that much better can’t wait to take if for a spin happy new year