How to bind all three types of FrSky receiver: ACCST, ACCESS, and Tandem

[@CarreraGTSCS]

You are a lifesaver! Perhaps a bit of overstatement but your videos take the frustration out of learning new protocols and troubleshooting set ups. Thanks man!

[@MrD]

I'm glad they help :)

[@morgangmilligan]

I just got my X20S I am turning away from Crossfire after many years. I just can’t stand modules and bays and all the bits. I’m starting with three 915 mghz OTA. I have been watching many of your videos on ETHOS. This one next. I GOT A FANCY ZORO RADIO AND THE DAMD SLOT FOR THE MICRO MIDULE DESITEGRATED BEFORE I EVEN USED IT. I bought it to replace my TBS Tango that can’t hold calibration. I’m very excited to learn this new radios tricks and Ethos system. Cheers Daren

[@MrD]

Good luck. I hope the radio is a good fit for you. I've certainly had nothing disintegrate so far :) After using OpenTX or EdgeTX, ETHOS should be fairly familiar. Thought there are some differences.

[@bongolongoallthetime]

Thanks a lot, it helped me getting started in the FrSky universe.

[@MrD]

Thanks, glad I could help.

[@kenspaceman3938]

Great vids! I used to build rc-airplanes when I was younger. I had a K.O.Digiace and some Futaba transmitters. both AM and FM. I trimmed throws manually on the servo horns and adjusting the length of the actuator. Mostly built my airplanes from drawings and using wood. Now I’m in my middle age and got a couple of modern transmitters, one is a Taranis x9dse2019 and the other multi protocol Jumper T-Lite. Both run OpenTX and the abundance of settings just in these makes me feel dizzy/lost. I also got som receivers, using the ACCESS protocol, a R-XSR, and some FrSky Archer glider receivers also. I have yet to try to register and bind AND make a model memory for my first airplane using the Taranis controller and the R-XSR receiver in a ZOHD Drift. Greetings from Finland! Wish me luck, this new gear isn’t easy for us old timers!

[@MrD]

Good luck. I know what you mean. It can seem very intimidating, but it’s not too bad once you get used to it. It is a very powerful system when you dive in deeper too.

[@SILVIOFRANCO1]

Thanks for the video, Darren. I have a lot of FrSky receivers abandobed here since I moved to CRSF. I will try to realive them using your tutorial. Great

[@MrD]

You’re welcome Silvio. No need to let good receivers die 😁

[@SILVIOFRANCO1]

@@MrD totally agreed

[@user-rx8qq8sk9ydv1ce5ib]

Thank you so much. Very helpful

[@ChunkyC_RC]

Another great video as usual D. Happy flying brutha!!!

[@MrD]

Thanks Chris. I hope to have lots of happy flying this weekend 🤣

[@hobbyzonemodelismo]

Hi @Mr.D . May you please give your expert input on this issue: I am using a TX12 EdgeTX and Jumper R1, Frsky XM+ and Jumper R8 receivers connected to 16ch SBUS decoders. When power is applied to the receiver, they apply signals to channels from dead center to -100 or +100 than back to center (If a servo is connected it will move from center to one side tan back to center). That does not happen to the R8. I tried to configure the failsafe on all available modes but there is no change. Is it a normal behavior for these tiny receivers? Because I need it to keep steady dead center/neutral on all channels when they are powered on just like the R8.

[@rcturbinator7855]

Thanks for help buddy! Awsome videos!

[@MrD]

Thank you 👍🏻

[@stevenmohr4588]

Hi Darren, you keep on helping me. Thanks for making your videos, greatly appreciated. 😘🤗

[@MrD]

You’re welcome Steven. Glad I could help.

[@crgonzalez08]

Great Video like always!

[@MrD]

Thank you Carlos

[@thesplodge47]

Hi.i have just got a twin x lite,and am having trouble binding my receivers .i have a fr sky x8r accst, a v8fr-11 and a d8r-11 plus. Could you do a video showing how to bind these if poss.and what if anything i should do beforehand.

[@MrD]

This video will show you how to bind the X8R. If it’s not binding, it has the wrong ACCST firmware. Flash it with the latest firmware for your region, and it should bind. The V and D receivers are not natively supported by the Twin X Lite. They use the very old D8 protocol. D8 is no longer legal to make new products for. So the new radios don’t support it. But, you can get an XJT Lite module for the radio which does have D8 support.

[@thesplodge47]

@@MrD thank you for that info. I have just ordered a new receiver . So fingers crossed it will be ok. Thanks again.

[@richardlong3615]

Hi Darren, Do you have or know of a video that shows how to change the mode from 2 to 1 on an X20

[@MrD]

Hi Richard. In the unboxing video, I removed the back and am sure I pointed out where the adjusters are. But it could probably do with a separate video.

[@smiffy788]

I like the idea of having two rx's in larger models.

[@MrD]

Yes, it could prove very useful. Handy in carbon models too, where you need antennae out all sides.

[@ikmaldoni1398]

hi, is it possible to connect td mx reciever to futaba sbus. I mean, can I plug all my servo to futaba receiver and the connect to td mx receiver via sbus port

[@MrD]

No, I don't believe so. The FrSky and Futaba protocols are inverted to each other.

[@randallpatrickc]

How do we test a Tandem Rx (on both 2.4 and 900)? With two Rxs I could just change the Rx number and see if the remaining one still worked?

[@MrD]

There’s no real need with TANDEM. They are the same Rx. It’s more like diversity, only using a different frequency.

[@user-rx8qq8sk9ydv1ce5ib]

Thanks for the video. I wanted to buy a Frsky dual band tx (+900mhz), the 20x but I found like tens of same looking transmitters with massive price difference (pro, s, etc) plus an available preorder for new ones coming soon..!!.. I will be using it with fixed wing planes (electric and gas) and to do some long distance flights with fpv on fixed wing. Same radio starting $400 to $1200 and more looking almost already the same. Can any one explain what’s going on!! Also why there is 900 and 925mhz! I am coming from Futaba and Spektrum,,I don’t know anything about Frsky

[@pi3k]

Hi Darren, your videos are awesome and have been so helpful! I updated my Horus X10S with ETHOS. I have a V8FR-II receiver, which is an 8 channel ACCST receiver. I can't seem to bind it. There is no firmware update for the V8FR-II on the FrSky website, which seems odd to me. Perhaps it is just so old they never updated it. Still, I thought all ACCST receivers could be bound in ETHOS. Any thoughts? Thanks for all you do!

[@MrD]

That is a pretty old receiver. To use it, you need to have the old XJT hardware. ACCST does work with the new ISRM modules. But only the receivers that use D16 ACCST v2. For the older hardware that uses ACCST D8 or LR12 (the V8FR-II is D8 when in D mode). You need to use an external XJT module or a multi-protocol module.

[@mickbell9645]

Hi Darren I’m setting up a res glider v tail with motor can I move the rudder stick over to aileron stick and how if you can kind regards Mike

[@MrD]

Sure Mick. To do this, edit the Rudders mix and make note of the settings. Then delete the rudders mix. Next, edit the Ailerons mix and change the settings to match what was in the Rudders mix. You could even rename that mix as Rudders. That should get you what you want. Unfortunately there is no option to select the source in these mixes. That would have made life much simpler.

[@madmike583]

Can you bind an R9 receiver to x20S I've updated firmware and flashed the r9 to Flex but having no luck

[@MrD]

Yes. Make sure the R9 receiver is on the ACCESS firmware. If you’re using Flex on the receiver, make sure you have also installed the Flex firmware on the X20. Enable the internal module and the 900MHz side. When you register the receiver, make sure to select the correct frequency for your antennas. I’ve bound plenty of old and new R9 receivers. All R9 receivers will work with ACCESS.

[@techFPV5964]

Hi Mr. D Nick Burns sent me over to you. I just purchased an Iflight baby nazgul 73mm quad with a Frsky D8 receiver. I also have the Taranis QX7 ACCST and i need to setup the model with D8 yes? Also in the CLI i enter bind_rx but what happens is that i have " bind_rx... "with the 3 dots as if Betaflight is waiting for another command. Do i hit save at this point? Also in my receiver tab in Betaflight the sticks are responding but the little drone on the right is spinnig like crazy in Config tab i can Calibrate ok. Also i cannot arm the quad. Can you help me with this sir? Thank you for your help!

[@almirgrebovic1006]

Is it possible to connect the receiver FrSky L9R (Mode LR12) to the FrSky Tandem X18 or X20?

[@MrD]

Yes. But you need to use the external XJT Lite module. I have this set up on a couple of planes. www.frsky-rc.com/product/xjt-lite/

[@rajeshs-wd5je]

how to bind frsky R9 (accst) and frsky D8R -II plus with frsky tandem x18.....thanks if you can make a video on it...thanks once again

[@MrD]

You can’t. You need to flash the R9 receivers with the ACCESS firmware. All R9 receivers have ACCESS firmware, so they can work with the X18. The D8R-II is an old D8 receiver. That will not work with the X18. You would need to get an external XJT Lite or Multi-Protocol Module to use the D8R-II.

[@rajeshs-wd5je]

@@MrD Thanks a lot...will explorer your advice.Thanks

[@bxhowbxstyle]

Im new to all of this. I have a Qx7 ACCST transmitter, I also have a td r10 reciever. Can i bind them?

[@MrD]

No, those two are not compatible. You need a tandem transmitter to use tandem receivers. This tool on my web site should make receiver selection easier for you www.mrd-rc.com/tutorials-tools-and-testing/useful-tools/frsky-receiver-compatibility-tool/

[@bxhowbxstyle]

@@MrD ahh. Thank you. From my research i figured that but thanks for confirming. Go8ng to buy a xr6r for the small size n weight to go with the project. I was originally just building a one for all system. Thanks again

[@randallpatrickc]

How do we Ethos bind a model with SR8 pro and R9 Rxs? Say in manual that both bind together - I’m not seeing that

[@MrD]

Set the protocol to ACCESS and turn on the 2.4 and bind the SR8. Then turn off the 2.4, turn on the 900 and bind the R9. Then switch the 2.4 back on. The SR8 will need to be the master receiver, or turn off the stabilisation.

[@hoyvintagecycles2936]

So helpfull thanks

[@MrD]

Glad it was helpful 🙂

[@rcjetaviator]

Hi Darren Nice work explaining the binding process..I have a question ? i am using X6R on a Horis X10 firmware is V2.10 for rx and tx works fine on the Horus X10.I want to use the same recevers on my new Tandem X 18 but can not bind them is it because the tandem firmware is not the same as the V2.10. In the tandemX18 Currantly in the internal module as TD-ISRM FW V2.2.6. any help would be appreciated. Cheers Kosta

[@MrD]

The X6R should bind on the X18. You need to select the ACCESS/ACCST option for the internal module protocol.

[@rcjetaviator]

@@MrD Hi Darren thank you for the reply.I have already set the internal module to ACCST D16 but does not Bind cheers.

[@MrD]

@@rcjetaviator do you have a mismatch of firmware? They should both either be LBT (EU) or FCC. If you have the flex firmware on the transmitter. You still need to set the region correctly.

[@rcjetaviator]

@@MrD Hi DSarren i have TD-ISRM FW V2.2.6. FCC ON THE TANDEM on the x6r i have the ACCST V2.1.0 LBT

[@rcjetaviator]

Hi Darren thank you for your help I just realised what was wrong it was a mismatch of firmware I have re flashed the receiver with ACCST v2.1.0 FCC and all binds ok on the Tandem X18 Cheers Kosta

[@DEeMONsworld]

what's the proper way to bind a TDMX in conjunction with a tdr 12 or 18? because you can't plug the tdmx into a battery stand alone? you have to plug the tdmx into the master rx for power via sbus in.

[@MrD]

With those receivers, you’ll be plugging in the TD MX using a standard servo plug. So just use thay to power the TD MX. It should be pretty simple with a BEC and a Y lead.

[@DEeMONsworld]

y connector OK, but BEC? This is a gas model no BEC. so you mean just plug a small battery into the one side of a Y adapter and the TDMX into the other? because I'm using high voltage connectors on my flight packs. is it really important to bind the TDMX unplugged from the tdr12? because i didn't and things all seem to be working, blue lights blinking everywhere. I didn't activate channel one as Sbus in until after I bound the TDMX, not by design, but by my ignorance which maybe why it worked. any thoughts?

[@richardcurry6499]

Great video, but I have a problem that I hope you can help with. I am trying to use a TD-MX receiver as a satellite to the SR8-Pro receiver. Are Frsky Tandem receiver's incompatible with ACCESS receivers? I can register and bind a master ACCESS first receiver, but when I switch to TD mode in the transmitter to register and bind the TM-MX receiver, it just doesn't work. I could not find any information on the Frsky website explaining that you cannot use ACCESS receivers when you are in the TD mode, when the TD is using both 2.4 and 900Mhz. Any assistance is really appreciated, thank you!!

[@MrD]

Hi Richard. You can only bind the same protocol types of receiver at any time. So ACCST with ACCES, ACCESS with ACCESS, and Tandem with Tandem. So for redundancy, you would need to use an R9 MX with the SR8 Pro; or any other ACCESS receiver with SBUS out. Tandem does use both 2.4GHz and 900MHz. But it isn't just sending out ACCESS simultaneously on the two frequencies. It is doing something different in there to optimise the data transmissions.

[@sparksfpv]

Wow!! Frsky says that the Tandem 20 series radio does both ACCESS and Tandem (TD) receivers. They fail to mention anywhere that I have seen that one cannot use both ACCESS and TD receivers piggybacked AT THE SAME TIME!! (despite using the same frequencies) I also learned that the Tandem transmitter, if updated to the latest firmware, will NOT bind with the TD-MX reciever with its current firmware, unless it is updated to the 1.0.7 firmware first. I spent several hours trying...lol!! And, thank you for making great videos on this subject!! Please consider incorporating some these issues in your next video if relevant. ✅️😎👍

[@MrD]

Thank you, I'm glad the videos help. That's the most important thing. I think the problem here is assumptions, as well as FrSky could have been more direct. Why assume that Tandem could run with ACCESS simultaneously? Would the same be assumed of Tandem and ACCST? They use the same frequencies, that is true. But so do ACCST and ACCESS, and they can't be used simultaneously from the same transmitter module. Tandem and ACCESS are different protocols, so no reason why the two could be used at the same time in that respect. But, it seems like there are plenty of folks who are thinking that the two can work together, so I will make a video introducing Tandem, and make it clear in there :) Firmware has always been a little bit of a pain. But it's always worth using the latest, stable versions. However, I have looked on the firmware pages for both the X20 and the TD-MX. Both state that receiver firmware 1.0.7 and ISRM 2.2.0 (or above) are needed. Updating the ISRM it states "Note: Please upgrade the Tandem receivers to 1.0.7 or above accordingly."; and on the TD-MX firmware page it states "Note: Please upgrade the Tandem modules to 2.2.0 or above accordingly." So the information is there, at the place the firmware is downloaded. Maybe it could have been put in bold or something to make it stand out more. I will chat with FrSky about this, as I'm sure it will help people out.

[@barrybroad3912]

Hi Darren. I have a strange and probably a simple question, I have an X20S and want to export all my models to my X20Pro can I simply copy from X20s SD card to pc desktop then onto my X20Pro or are the files not compatible, any advice would be appreciated.

[@MrD]

They should copy across fine 👍🏻

[@giovannivitali9536]

Hi, thanks a lot for your videos, they are of great help. I am considering buying the X20: do hou have any evidence of X20 range in 2.4 GHz only (before telemetry is lost and before a signal alert)? I am also planning to buy TD receivers: are you aware of possible interference between the two frequencies or other issues? Thanks a lot

[@MrD]

Hi Giovanni, thanks; I’m glad the videos have been helpful. I’ve not used the 2.4GHz system in anything other than LOS planes. I have never had a telemetry lost warning while flying. But have been close to the edge of my visual ability. So the 2.4 side works flawlessly for its intended purpose. At least one of those flights was with a 2m glider at over 1000m high and out around 250-500m. The glider was basically a dot in the sky. The 900MHz side is what is intended for range. An there is no problems with that at all. There is a video somewhere of someone (not me) flying 100Km away with control link. There are no interference problems with 2.4GHz and 900MHz. In fact, FPV systems on 900MHz control links quite often used 2.4GHz for the video side, for more range than 5.8GHz.

[@giovannivitali9536]

Hi Darren, thanks a lot. It was exactly the kind of info I needed! I think I will buy the x20 with the TD10 channel receivers, then!

[@giovannivitali9536]

If I may, another question: I live in Italy but I can find the TD receivers only on non-EU sites (e.g. Banggood). No site says if the Rx is EU-LBT (868 Mhz) or FCC (900+ Mhz) compliant (or both?). Do you know if the Rx come in a single version good for both standards or you must buy specifically a LBT receiver for a LBT Tx?

[@MrD]

@@giovannivitali9536 with ACCESS the Rx has its region set by the transmitter. So long as you get the correct EU LBT transmitter, it will all work fine.

[@giovannivitali9536]

Thanks a lot! Great

[@serang]

What's Tandem? Is it a new protocol? I've been using ELRS 2.4 lately, and I just converted my R9 radios to ELRS.

[@MrD]

Tandem is a new hardware. It combines 2.4 GHz and 900MHz for simultaneous use. So it has inbuilt redundancy and can also choose the best signal to use at the time.

[@erwinleusing6041]

How do I set up a delta plane on the tandem x18

[@MrD]

in the new model wizard, set the tail type to none.

[@sleepingbearffg5008]

👊👊💪💪

[@chiprobertson3094]

Holy shit get on with it