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Prompted by the brief mention here: I'm going to attempt to summarise the extremely useful development in the FrSKY world that simplifies the whole minefield of ACCST version compatibility. I'll also say up front that I was prompted to look into this with the purchase of a new radio, but if you're happy with your current FrSKY compatibility situation this updated firmware may be of limited value to you. History First off, a little history to set the scene (I think this is at least roughly right)... FrSKY introduced the ACCST (v1) protocol with the Taranis X9D in 2013 and life was simple. There were a few variations in terms of the receivers D8 vs D16, telemetry and non-telemetry, but essentially the radio you bought would bind with the receivers you bought. The EU regulations introduced in Jan 2015 changed the way 2.4G protocols had to work ("listen before talk" or LBT) which meant that FrSKY had to split their compatibility between EU LBT and the rest of the world which we'll refer to as FCC compatible. This also effectively banned the D8 variant which was not LBT compliant. So at that point you had to make sure that you either bought an FCC RX to maintain compatibility with your old TX, or an LBT RX to ensure compatibility with your new TX. In Jan 2020, FrSKY introduced ACCST v2 (in both FCC and LBT variants). This resulted in there now being 4 different potential versions of the firmware on your TX and RX. There is a comprehensive description in more detail of all that here: https://inavfixedwinggroup.com/guides/getting-started/frsky-protocols-made-simple/ Its worth noting that ACCESS is a completely different protocol that was introduced more recently and is not considered here as this new UNI firmware is not relevant for ACCESS users at all. Current FrSKY radios fully support ACCST v2 in either FCC or LBT variants alongside ACCESS. New UNI Firmware As you can see from the announcement here: https://forum.alofthobbies.com/index.php?threads/universal-accst-firmware-is-coming.2252/ the project to try and simplify this situation involved various dealers and primarily Mike Blandford producing a new version of the ACCST RX firmware that will bind with any ACCST TX module. As well as that primary goal, if you have a read of that thread you'll see some other nice features such as dual bind (can switch between two TXs without having to press the bind button), enhanced link telemetry (VFR values in addition to RSSI) and some general transmission quality enhancements. Suggested Approach I've made the move to the UNI firmware for some older X8R, X4R and X6R receivers and in the last month, a version of the UNI firmware has been released for the newer RX6R, RX4R, G-RX6 and G-RX8 receivers which I'm now using too (I've updated but not tested). By updating these receivers I am able to bind (or dual bind!) to my original 2013 X9D, my newer X9D Plus or my latest TWIN XLite. The flashing process can be done in a few different ways (many details in the RCGroups and Aloft Hobbies forums) but in addition, T9HobbySport offer both pre-flashed X4R and X8R receivers for sale and also a flashing service: https://www.t9hobbysport.com/frsky-xr-uni-accst-firmware-receivers I'm not sure if that service extends to the RX6R/4R RXs yet. Self flashing is possible in the same way as you'd flash any other receiver firmware with the only caveat that there is also an activation process to be carried out which means requesting an activation code from an authorised FrSKY reseller and entering it via a script running on your OpenTX radio. To avoid confusion, its also worth noting when it comes to the T9 website that Universal firmware is not the same as UNI. Universal is the nomenclature used for the non-LBT (FCC) firmware variant on that site. I would also consider taking this opportunity to consider flashing your TX module to ACCST v2.x (which for clarity is completely separate to any OS updates to the TX e.g. OpenTX 2.2 vs 2.3 or EdgeTX). The "XJT RF Module" firmware is available to download here: https://www.frsky-rc.com/taranis-x9d-plus-2/ and is supplied as a zip file containing both FCC and LBT versions. Assuming you are in the UK you should use the LBT version for strict compliance with UK/EU regulations. When considering the TX module update you should be aware that you will lose D8 protocol compatibility if upgrading to ACCST v2. More Info There are two main sources of info I've used which are the threads here: https://forum.alofthobbies.com/index.php?threads/universal-accst-firmware-is-coming.2252/ and https://www.rcgroups.com/forums/showthread.php?4148667-Uni-RX-A-new-firmware-for-FrSky-ACCST-receivers (About page 14 is where the newer RX6R/RX4R firmware is discussed/released) I'm not going to post links to the firmware directly as those links may become out of date as new versions are released so please check the original sources for up to date info/downloads. I hope that's of use to some of you...
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Now that winter testing is fully underway, I can see the benefit of a telemetry receiver in gauging practice launch heights. I recall at last April's try it day at Buckminster that someone was using a Lemon telemetry receiver. I assume it was a Lemon LM0051. Question is will it work safely on a single Lipo? 3.7v-4.02v. Literature for an LM0051 suggests not - 4.5v min. I currently use a Lemon RX6 which runs fine for over an hour on a 1s lipo.
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Hello, Could anyone out there offer a spot of advice on 2.4GHz aerial installation please? I'm fitting out my shiny Erwin XL Medium with a Jeti 8ch RX. TX is Jeti DC-16. The front of the fuselage is glass, while the rest is mostly carbon. Does my aerial installation, inside the fuselage look sensible? When the model is flying away from me, will the carbon at the rear of the fuselage block the signal? Obviously I will do some range testing before committing to the sky, but I was wondering if others might share their tips on this - who thinks that 2.4 wires should always exit the fus when there's carbon about? Should one of my aerials be aligned with the 'z' direction? etc etc I'd clearly rather not be drilling holes in the lovely molding, if it is not necessary. thanks, Ribs
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