rmac

Thanks Arthur: The 42.5 degree offset was the part I was missing. The data sheet for the LPS25HB gave the 480 count/degree scaling factor but no mention of an offset. All is good now. Thanks for your quick response. Richard

I am trying to read the temperature from the barometer (LPS25HB) on the Pmod Nav board. Per the data sheet this is in a two byte register (L=2B, H=2C). I can read the data, which is supposed to be in 2's complement format. Typical readings at room temperature are: H = 11011001, L=10111011. In 2's complement format this temperature is negative. Room temperature is not negative in any units I am familiar with. I assume the units are degrees C. What do I do with this data to calculate the temperature? By the way, the barometric pressure reading works fine.