Jumper T18 Review

Jumper T18 radio transmitter and FrSky R9 receivers

One of the advantages of the Jumper T18 over its competition is the JP5in1 Multiprotocol Module compatibility not only with 2.4GHz FrSky and FlySky receivers but also with Long-Range FrSky 868/915MHz R9 system. At least in theory, because when I got the radio, I could not bind and use any of my R9MM or R9 Mini with the Jumper T18. However, to make it work, all that is required is to update the firmware of Jumper T18, JP5in1 Multiprotocol Module and, in some cases, in R9 receivers.

Jumper T18 Multiprotocol Radio

  • JP5in1 and Jumper T18 will work only with FrSky R9 ACCST FLEX firmware. So make sure you download the latest ACCST FLEX and flash it to your receiver using, for example, this guide
  • Make sure your Jumper T18 has the latest OpenTX version installed. You can download it from the Jumper page and flash to your radio using this guide
  • Update JP5IN1 firmware to the latest from https://downloads.multi-module.org/. Bear in mind that Jumper T18 OpenTX firmware and JP5IN1 firmware are separate entities and flashing only one of them will not solve the problem. Flashing instruction is available here
  • In the OpenTX External RF section select:
    *   MULTI
    • FrSkyR9 (will be at the very end of the list)
    • 868 or 915 MHz frequency, depending on where you are. Europe is 868MHz, US is 915MHz, rest of the world depends on local regulations.
  • Bind and use it as any other R9 transmitter module!

Finally, bear in mind that JP5IN1 has a single power output level and will always transmit at full power. There is just no dynamic output power switching!

7 thoughts to “Jumper T18 radio transmitter and FrSky R9 receivers”

  1. I have been having a weird issue using an R9 receiver with my T18 Pro. When Ever I bind I get issues where my Radio’s channels jump around on the radio, only by 1 or 2 % but its enough to make servos twitch. Not a fun experience. I don’t mind not ever using R9 but seeing as I have a brand new R9 receiver I wouldn’t mind using it.

    Any suggestions or anybody had the same issue.

  2. Me sirvió muy útil esta información, actualicé la Jumper t18 a la 2.3.10 opentx el módulo internó a la última que me salió……77 termina y no me funcionó el módulo frsky r9m accss externo me imagino por lo que e leído que no es actualizable a versión Antigua accst y tengo que comprarme el módulo antiguo que ya es accst sabéis algo sobre eso?

  3. Hi Pawal, I’m a big fan of yours. I watched your youtube and tried to flash my R9MX receiver using R9Mini ACCST FLEX firmware (i.e. R9_MINI_FLEX_Fport.frk) using my Jumper T18 external bay’s pins, it flashed successfully (per screen) but it never powered on again. Would you please advise me what I do to recover it please. Than you very much.

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