Have a 4PLS and R204GFE receivers (2) and it seems the receivers automatically connect to any model I select on the Tx. I've copied empty models to existing ones to reset everything and start fresh but I select a completely different model on the Tx, turn the Tx off then on again, set the Rx to the right mode and turn the Tx back on and the receiver finds it and binds to it right away without me pushing the "SW" button on the Rx. This makes it pretty frustrating to have different models unless I'm EXTRA vigilant about my order of operations when I switch models and turn cars on and off. Is this just how Futaba is or do I have a setting wrong somewhere making the receivers automatically connect?

I emailed Futaba and apparently this is how S-FHSS receivers work? This is what they said…

“Once the receiver (S_FHSS Protocol) has been bound to the transmitter, it does not matter what model selection is made within the transmitter.



The receiver has been “allowed” to respond to the transmitter, so it will listen to anything the transmitter sends out.



T-FHSS receivers do NOT do this.

T-FHSS protocol is model specific”

So I guess I need to buck up for the expensive T-FHSS receivers. UGH!

I think you are a bit confused.....

With S-FHSS only the receiver will`store the ID of the transmitter. When you have used on all models an S-FHSS receiver then no matter what model you have selected, the receiver will react. But it will never react to other transmitters once it was binder to yours! Except when you do a bind with another transmitter.

With T-FHSS there is a 2-way communication so the receiver will store the transmitter its ID but the transmitter will also store the receiver ID in the current selected memory model. So when you select a different model (with another T-FHSS receiver binded) the receiver will not response to it because the wrong ID.

It would be nice (and it is technically possible) if the transmitter would detect the T-FHSS receiver and does an auto switch to the right model.....

I'm also a bit confused on the end goal. If you have two different R204GFE receivers bound to the transmitter you should only be controlling one model at a time. If model 1 is selected and trimmed for "car 1" then your set same for model 2 and "car 2"....it would be possible to forget to change models in the transmitter and have model 1 trims while operating "car 2".
You shouldn't have "car 2" and "car 1" on at the same time.....which is how the post sounds like it is written.

Initially I thought something may be wrong since I was able to control either vehicle with one model selected on the 4PLS. In real life, correct, both vehicles won't run at the same time but just seemed not right coming from a Spektrum system where one model on the Tx controls one RC and nothing else. Nothing wrong with the Futaba way of doing it now that I know how it works. I guess maybe the end goal was to make the Futaba system a little more friendly to switching models is all since S-FHSS doesn't use unique Rx IDs. It looks like I may be able to get there using DasMikro or any other T-FHSS receivers though?

I use the 4pls. Bind system is a nightmare. But it’s one receiver, one vehicle. If controller shows model 1, model 3 isn’t going to work. Or it shouldn’t

It’s very easy to have the controller not actually switch models.

What receiver are you using?

That's correct the FHSS receivers if properly bound to a Futaba transmitter will work simultaneously. I'm guessing that's because the receiver binds to the transmitter, as opposed to the transmitter binding to the receiver. Which allows this to happen.

I was in a race once with my 4PL and I had put away my SCT I had just raced. Didn't realize I forgot to turn it off and it jumped off the table and was running all over the pits while I was on the drivers stand warming up with another truck, completely unaware this was happening.

See now this is the ridiculousness I'm talking about lol. I ended up ordering DasMikro T-FHSS receivers off Aliexpress to try. Hopefully they work like I'm thinking they will.

​​​​​​​how would that work? As they have two different IDs???

(S-)FHSS receivers will react on any model (with same protocol) selected on the same transmitter. So if you switch to another model and leave the 1st switched on it will react also.