Hi, just to update we got there in the end with the AT server install so we now have a production platform and can do the proof of concept stuff. In general the guidelines are really good, as long as you read them thoroughly ; - ) and get yourself up to speed with the necessary command line basics. The trip up points were missing that the AT server install REQUIRED node 4.2.X, despite that being in bold letters [Doh!] and other things like needing Xcode command line tools. Also if you're stopping the server, do it properly with Control+C as otherwise you're asking for errors. For other newbies getting going with this, I can't emphasise enough: take the time to read the guides properly.