state.path = drive({start:'Geneva,CH',end:'Hamburg,DE',accuracy:5});
retval.time = { "$date" : moment.now()};
retval.data.location = state.path.latitude + ","+ state.path.longitude;
retval.data.speed = state.path.speed ;
retval.data.temperature = chance.integer({min:10, max:45});
return JSON.stringify(retval, null, 2);