BLE Mesh support

[dburner]

Is your feature request related to a problem? Please describe.
I have some existing LEDs on my stairs, but they are wired using only 2 wires (wires goes in some conduit inside the wall, cant add a third one).
I want to enhance my LEDs with ESP32-C3 Mini and a 7 Ring LED. In each LED channel there seems to be enough room to squeeze an ESP32-C3 Super mini.
The problem is I don't think adding 16 clients to my Wifi would be too great since they are not on wifi6 and I think the connection in there is pretty pour.

Describe the solution you'd like
I would like 1 WLED to be a primary, and the rest to be secondary connected to the primary only using Bluetooth Mesh.
When the primary changes the effect or color I want to signal the secondaries (via BLE mesh) the new configuration.

Describe alternatives you've considered
Connecting all controllers via WiFi.

Additional context
Does anyone who knows the codebase think it's possible to implement this as a user mod? I could give it a try

[DedeHai]

Bluetooth is not possible, it uses too much flash.
Can you use ESPnow sync?

[dburner]

I think I could, but how? From what i see online its only for the wizz remote?

[DedeHai]

you can add ESPnow sync in settings, this can be used to sync ESPs without the use of wifi connection.

[dburner]

@DedeHai sko just adding this setting to all esps (except the primary), will make all the others sync to the primary? If so this would be nice to be documented, help only mentions wiz mote example.

[DedeHai]

its still a beta feature, see the changelog:
https://github.com/Aircoookie/WLED/releases/tag/v0.15.0-b1