Hi Jon Hou,
please have a look at this article of mine. It might be useful:
One pixel thermal imaging camera with Mathematica and ArduinoOne pixel thermal imaging camera with Mathematica and Arduino
The article deals with another Melexis sensor, but I suppose that you might also want to use the SerialIO used in that article. It is relatively easy to adapt to more than one value when you read the serial port.
Marco