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adafruit / Adafruit_BME280_Library

Arduino Library for BME280 sensors
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Is it possible to return absolute humidity instead of relative? #22

Closed moeburn closed 7 years ago

moeburn commented 7 years ago

I was looking at the code for readHumidity, and it looks like it first takes a temperature reading then implements this into the humidity reading formula. Does this mean the BME280 is actually outputting absolute humidity, and the code is converting that to relative?

Because I much prefer absolute humidity, and in my code I am taking this relative humidity value, and the temperature value, and converting it to absolute. But if the BME280 sensor itself can output absolute in the first place, I wouldn't need to do this inaccurate equation.

ladyada commented 7 years ago

we follow the datasheet instruction, check those for any calculations and what they measure preciesly :)