Lee esto porque esta todo resuelto con mas de lo que te imaginas
Resuelta la comunicación privada como pides o broadcasting ( a todos los nodos).
http://tmrh20.github.io/RF24Audio/
Features
- User friendly setup and configuration: For beginners too: Just connect a radio module, microphone, and speaker. The library handles the rest.
- Recording and broadcasting of audio to multiple devices using only Arduino, RF24 modules and input/output devices (speaker,microphone)
- Multicast: Enables broadcasting to all nodes, single nodes, or partial groups of nodes
- External controls: Use external buttons or code to control audio streaming
- Volume control: Use external buttons or code to control audio volume on receiving devices.
- Remote control: Start recording remotely via radio commands (Currently cannot stop remote recording)
- LED Indicator/Visualization: Indicates audio playback and amplitude.
- Customization: Using the underlying RF24 core library allows custom interaction with audio devices running this library. Receive audio data and stream it to a PC over USB, create and broadcast computer generated audio in realtime, and more! See the USB_Audio example for more info.
- Create additional node groups: Allows nodes to join private broadcast groups, and multicast only within their group as desired. See advanced section below.
Y aca lo mismo presentado con algunos detalles