if the Arduino does WiFi and SMB file sharing you can use it as a Sonos music library.

The USB to Ethernet would work in place of WiFi.

Thanks for the quick reply Stanley

So if I connect into any of my spearkers or soundbar ethernet socket it would work just like plugging in a record deck to  an amplifier ? 

I have a sd card with my playlists 

So using  the Sonos app and Spotify if the Arduino has no wifi  what is needed ? the concept sounds good  to just create a library without downloading and making mp3s

But someone else built the adapter and it sounds very complicated to do..

as my programming  skills are 0

Thanks for the quick reply Stanley

So if I connect into any of my spearkers or soundbar ethernet socket it would work just like plugging in a record deck to  an amplifier ? 

I have a sd card with my playlists 

So using  the Sonos app and Spotify if the Arduino has no wifi  what is needed ? the concept sounds good  to just create a library without downloading and making mp3s

But someone else built the adapter and it sounds very complicated to do..

as my programming  skills are 0

Ethernet does not work like that, it connects to your router to pass data to other connected devices.

Sounds like you need help with the Araundo first to get it connected to your network. Once that is done we can help you with the Sonos part.

My understanding If its not wifi A module could be added 

Apparently no Arundo experts here, sorry.

Once you get it on your network and running SMB / Samba check back for Sonos help.

Hi ​@prezzo 

Thanks for your post!

Alternatively, assuming that you want the audio coming from the Arduino to play directly on your Sonos system, rather than the Sonos system getting access to the same library as the Arduino, you would need a Sonos device that accepts Line In like your ZP90, but that works on S2.

The cheapest way to do this with a new product would be to buy an Era 100 and a Line-In adaptor for it. Connect the Arduino to the adaptor with a 3.5mm to 3.5mm stereo cable, and Line In will show up in the Sonos app as a source for all your Sonos devices (not just the Era 100).

You may be able to find a cheaper, second-hand option, of course - these could be a Port, Play:5 (Gen2) or a Connect (Gen 2). The Port and Connect would both need a RCA-3.5mm stereo cable instead.

I hope this helps.

Thanks for the reply .. I have the audrino set up and works fine my options now for audio out are 

1. use the Zp90 and revert back to Sonos 1 app connect via 3.5 andio pin to Tos/optical 

I already have a ZP 90 so only cost is the cable 

2. connect the Audrio to Raspberry Pi to allow them to work together as the Pi has wifi.. but will need to seek advice how to do this as I dont have a clue on programming. the advantage would being able to use spotify through sonos app
3. add Wifi board to Audrino… I think option 1 looks the best option..
4. Question... is the 3.5mm pin giving stereo output ? or just Mono ?

Regards Paul

I have some SMB guides here: Live Journal: Stan

A 3.5 connection can be mono or stereo. The plug for stereo has a tip/ring/shaft while the mono only has tip/shaft connectors.

The Pi’s output jack is stereo.

Hi. Everything at the moment is connecting through the audrino is Audrino capable of a stereo output ? Is it just a case of adding a stereo output socket if the 1 fitted is only momo ?

Output - No idea, you’d have to ask on their site, not here at Sonos.

Socket - Changing the socket would do nothing, you’d also have to change the upstream audio electronics and chips to move to a stereo system if it is presently mono.