NodeSerial

serialPort.on("open", function () {
  console.log('open');
  serialPort.on('data', function(data) {
    console.log(data.toString());
  });
});

MacBook-Pro:Desktop Pro$ node ard.js
open
 0.78, 27.64
159, 0.78, 27.64
160, 0.78, 28.12
159, 0.78, 27.64
159, 0.78, 27.64
159, 0.78, 27.64

1
58,
0.7
7, 2
7.15


15
9, 0
.78
, 27
.64