Hi, I was wondering if anybody has any experience with the Crossover XR602T-F2 receiver for FrSKy?

https://www.crossover-rx.com/productinfo/302368.html

There seems to be a shortage of XM+'s in the UK right now and I decided to give this one a try.

Nope, never tried one but it looks like a clone of an R-XSR. You have nothing to lose by giving it a try. What price are they going for in the UK?

Just got it for £15 from yourfpv.co.uk. Interestingly, it's a bit smaller than the XM+ and supports telemetry, so quite nice if it does work OK. There seemed to be some problems with early firmware, but they claim these are solved now.

I'll report back if/when I get this working!

Well, I've been out of luck binding two different XR602T-F2's. I think it may be related to ACCESS/ACCST business. Could it be that this receiver is ACCESS compatible only? (I'm using a Taranis QX7 ACCST). No luck searching around...

ACCESS is a proprietary FrSky protocol which is encrypted which means no-one other than FrSky can make use of it. So the Crossover XR602T-F2 can therefore only be making use of the ACCST protocol.

What version of the ACCST firmware do you have installed on your QX7?

Hmm interesting, that can't be the problem then.

I think I'm on the most recent: ACCST D16 v2.1.0

OK, so you are running ACCST 2.x.x firmware on your QX7. ACCST 2.x.x should be considered a completely different protocol to ACCST 1.x.x and they aren't compatible with each other. I'm 99% sure that the Crossover XR602T-F2 will be making use of the the ACCST 1.x.x protocol.

Which version of the QX7 do you have? Is it the older ACCST version or the newer ACCESS version?

Didn't know that! My Taranis QX7 is the older ACCST version. I guess that, if I flash the transmitter to 1.x.x firmware I would have to flash all my receivers as well 

It's annoying that this sort of thing is not mentioned anywhere and Crossover's website doesn't have much information. Many thanks for your insights, Snow.

aaand, I've just come across your other thread: https://intofpv.com/t-beware-frsky-accst...x-firmware
and see what you mean.

I flashed the most recent ACCST protocol when I got my Taranis some 6 months ago, had no idea about this. I guess that, unless there's increased performance with 2.x.x, I may need to think about switching everything back to 1.x.x.

If anything there is decreased performance with the 2.x.x firmware. We've had a number of reports of people complaining about reduced range and lower RSSI values after upgrading to ACCST 2.x.x.

Unless you have a good reason to be on ACCST 2.x.x then you are probably better off going back to ACCST 1.x.x. That previous version has been working fine for years. FrSky only released ACCST 2.x.x to try and lock out 3rd party receivers, but it's backfired on them because they've now created a complete complex mess of firmware incompatibilities which has p*****d off the FPV community. This is why everyone is now jumping ship to TBS Crossfire, TBS Tracer, and IRC Ghost systems.

Yeah, I've now had a look online and seen the sh**storm! Not a nice move from FrSky.

I've been wanting to get a smaller transmitter, and the Jumper T-Lite may be the perfect option, as it would allow me to reuse the XM+'s I have in a couple of quads and also try out crossfire (rather than the Tango 2 that would lock me in crossfire).

I will try to roll back to ACCST 1.x.x and see whether I can get the receivers to bind. Many thanks for your help!

No problem. Please let us know how you get on because if you're successful it may open up the use of that alternative receiver as another option for people.

Keep in mind that unless the Crossover XR602T-F2 receivers specifically say they are EU-LBT receivers then they will most likely be using FCC firmware. Which means you will need to install the FCC firmware on the internal XJT module of your QX7. That may then cause you additional headaches if all of your other quads are running EU-LBT firmware. You can say thank you to FrSky for that.

Well, I got it to bind!

You are right and it needs ACCST 1.x.x FCC flavour. Will try to do a range test and see how it works.

Good news. Please let us know how it compares to an XM+ or an R-XSR.

I would be interested to know if the FPORT connection works fine on that receiver and if you get the full set of telemetry sensors on your transmitter.

It has been a while, but I have finally received all the parts and had the chance to test the receiver earlier today.

I'm using FPORT and successfully getting telemetry in my transmitter. It all seems to work fine, although the transmitter sometimes shouts "sensors lost" when the receiver is <3m away. No issues at all when flying though.

In terms of range I can't really comment as I haven't gone very far. Will try further in the weekend.