Thanks for your help and explanation BluPhenix - very much appreciated!

I did actually get it going with:

socket.write("GET /playpause HTTP/1.0\r\n\r\n");


But following your advice and looking at the HTTP library I'm going to do it the way you suggest - and see if I can then display the current song/artist and state of play - which is also output by the spotify web server app.

(If I can get it to do that I'll be very happy!)

Cheers

Zack