Multiroom audio
Looking for a multiroom audio solution for your home there are mostly proprietary, unflexible approaches, which are expensive by the way. Hence i put some thoughts my self in it and came up with this idea:
The block diagram illustrates the idea of the system. The core is a POE Audio board, which has ethernet as input and audio with 20W as output. Simple as that!
The audio transfer shall be done synchronized with Snapcast. Power is supplied by IEEE 802.3at “PoE+” standard. Therefore its a very flexible decentral system, which is very simple to install with only one wire.
There are many projects having a similar approach with the Raspberry PI and a separate amplifier. The here shown solution however, is more compact and more economic.
Additionally Wifi and Bluetooth on board enable you to turn almost any speaker into a smart speaker, which can be integrated in you home hifi system.
Hardware
Software
Since I’m originally a HW Developer i started with the design of the board. The base is a ESP32 WROOM Module. The micro USB for Debugging separated and can be plugged in (many thanks to https://wesp32.com/ for the idea). The used chips are “standard” and have therefore good support from the ESP SW Framework. Details can be seen in the blockdiagramm.
There are three SW parts needed:
- ESP-IDF
- ESP-ADF (https://github.com/espressif/esp-adf)
- Snapcast Client (https://github.com/bridadan/libsnapcast)
Dokumentation
HW / SW Interface: Wroom_Pinning_A-Sample
Current Status
The first Hardware A-Samples are currently in production. The arrival probably in April.
Interessted?
Do you have any hint, question or interesst just hit me up per mail: service@gerhardt-tooling.de
