the Sonos is a uPnP based system there is no IR or way to traditionally control it. Everything needs to be done via HTTP calls. He’s using an Ethernet Shield to translate the RS232 events to uPnP messages.
Introducing the Tandberg Sølvsuper 10 radio, a product of the Scandinavian Hi-Fi golden age. Sadly, after decades in storage, the huge variable capacitor inside has seized from corrosion and the radio was beyond repair.
This project starts with very interesting words, “Say googbye to a separate iPod dock in each room!”.
This is post using Arduino and Ethernet Shield to beep Morse Code.
And It use the TCP protocol via Ethernet, which enables any device connected to the same network to send Morse Code as audio