Serial.on() issues...

I've just added Function.prototype.bind, so you should now (it the latest builds) be able to do:

function EasyVR(ser,onCm,onTo) {
  this.ser = ser;
  this.onCommand=onCm;
  this.onTimeout=onTo;
  this.ser.on('data',evr.onWatc­h.bind(this)); // <--------------
  this.vrstate=-1;
  this.stsr='o';
  this.rcvv="";
} ;
EasyVR.prototype.onWatch=function(data) {
    console.log(this);
};

I'm not sure which is better - the bind will actually be slightly faster though.