Ice, boiling water would be good references for 0 C and 100 C
9 C beer on an old version of my program was giving me 16077 (sensor - calibration)+16384 but not sure if that is the formula I used for the picture. Ambient temp was giving me 16460:
Lamp at 20.6C is room temperature giving me 16451 so about the same as the previous image.
Colder spot about 16C (winter and my office corners seem to leak heat out or let cold in. Value 16299
Ice tray and lighter, ice 14708 this was below freezing (maybe -6C) because I just took it out of the freezer.
Lighter reads 18801 but not sure what temperature that is.
I was borrowing a friend's thermal spot gun, but I never finished calibrating the values and I think this is an old version of the code so the formula might not apply anymore.
Edit: but maybe using the sensor data instead might be better, the ones I posted did subtract the calibration values and added the 16384 offset I used.
Edit2: nope just by looking at the values the only ones that make sense are after subtracting the calibration from the sensor, the offset (16384) helps for the computation to keep the values centered on a 32768 range, 32K values (the 1024 ones that is)