Espruino and Amazon Alexa integration (implementation completed)

@PaddeK ahh, ok. Thanks - I look forward to a PR when it's ready. It could potentially be difficult since the ESP8266 should be powered off when not connected.

As a hack for sending UDP, you can do something like this for now:

function sendUDP(addr,port,data,callback) {
  if (!callback) callback=function(){};
  data = E.toString(data);
  var at = wifi.at;
  at.cmd('AT+CIPSTART=4,"UDP","'+addr+'",'­+port+','+port+',2\r\n',2000,function cb(d) {
    if (d=="4,CONNECT") return cb;
    if (d!="OK") return callback("ERROR: "+d);
    at.cmd('AT+CIPSEND=4,'+data.length+'\r\n­', 1000, function cb(d) {
      if (d=="OK") {
        at.register('> ', function() {
           at.unregister('> ');
           at.write(data);
           return "";
        });
        return cb;
      } else if (d=="Recv "+data.length+" bytes") {
        // all good, we expect this 
        return cb;
      } else if (d=="SEND OK") {
        at.cmd("AT+CIPCLOSE=4\r\n",1000,function­(d) {
          callback(d=="OK"?null:"ERROR: "+d);
        });        
      } else {
        callback("ERROR: "+d);
      }
    });
  });
}

But I have attached my extremely work in progress UDP implementation.

It may be that this just isn't possible with the ESP8266 AT firmware. As far as I can tell the AT firmware provides no information on where a UDP packet came from (address/port), so it might not be possible to send a response back to the right address (unless you know for sure where Alexa is).