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DIY-Multiprotocol-TX-Module
Multiprotocol TX Module (or MULTI-Module) is a 2.4GHz transmitter module which controls many different receivers and models.
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Let clarify what a 4-in-1-module actually is and can do. It means it has 4 radio chips, that each covers a significant number of protocols. It's open source (find it here). You just select a model in the radio, then set what protocol it should use and off you go. It actually supports like 100 (ish) protocols over all (so many many more if you count sub-protocols). Some radios come with just a single of those 4 chips (typically the CC2500, which does Frsky, Futaba/SFHSS,Hitec,Esky,.. but NOT FlySky), but is usually ~10 bucks cheaper than the version with the full 4-in-1. Weirdly enough, many of those radios still have a "module slot" that can accept external modules, including a full 4-in-1 to expand that protocol pool later, too, if actually needed.
Yes. that Jumper T12 Pro is the one I have, and I highly recommend it! I personally had no problems with it at all, but I did have problems with the (much older) Jumper T16, but it seems they learned from their earlier mistakes and the T12 Pro was really perfectly fine for me. The reason I'm not using the T16 is that it's just so much bigger, and frankly the color screen seems like a nice idea (and it is), but it uses a lot of power (battery life) and is just harder to read is full sun light.All of thses transmitters (including FlySky) are some variation of "cheap chinese electronics", and the 'cheap' part is obviously the part we really like. The one problem I know of that it used to have was a software issue in OpenTX (related issues on Github #1 #2, if you're really curious). Basically, using voice output could stop it transmitting, which is obviously very bad (stuff falls out of the sky!), but has been fixed ages ago in OpenTX 2.3.8 (from about a year ago).
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