Not 100% fastled related but does relate to my project with contains fastled.
I’m currious if anyone knows if it’s possible to control 2 bluetooth modules with one device?
i.e 2 arduino’s with jy bluetooth modules being controlled by 1 phone with bluetooth & app
Currently I have to pair and repair to the other device to make changes to the effects/settings but i would like them to mirror each other.
As far as I know, you can have one-to-one, many-to-one, or many-to-many (multi-point devices), but communication only happens with one paired unit at a time.
BTW, check your hangouts.
With a Bluetooth Low Energy (BLE) module, I believe no pairing is involved, thus you can use multiple controllers simultaneously. (But you need a recentish iPhone and Android that supports BLE)
Maybe i will try using IR. i just got a IR remote kit in the mail last week. It might be easier to control both devices with one IR remote.
That I know you can do. I’ve done that myself.
What about using 2 mini pro’s. 1 with bluetooth & 1 with ir. And having the bluetooth one send Ir signals to the other avr kinda acting like a master/slave.
You’re now dealing with latency issues. You won’t be able to trigger both at the same time. You’re better off with three RF transceivers, two as slaves, and one as master. Have the slaves configured with the same address. When the master transmits, both will receive.
I figured it would have some latency but I’m not sure if it matters. I’m putting then into a pair of shoes so timing is not super important as It would be in poi.
RF is cheaper. 
But ultimately, yes it shouldn’t be too hard to do what you’re wanting to do.