BME280 accuracy using Micromite


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TassyJim

Guru

Joined: 07/08/2011
Location: Australia
Posts: 6546
Posted: 09:58pm 16 Sep 2019      

Can you run the same code on a micromite to see if there is a similar difference in readings.
If there is a difference, you can then print the calibration values etc to see where things deviate between the platforms.

I don't have a PiZero so can't do it here.

I find my BME280 reads higher than the others when there is more air movement.
When there is little air flow, the difference between the various modules is much less.

This is this mornings test:
  Quote  07:46:51 T(BMP180): 14.0 P(sl): 1028.5,T(DHT22): 13.7 H: 45.5,T(DS18B20): 14.0 BME280: T: 15.1 P: 1028.4 H: 42.7
07:47:01 T(BMP180): 14.0 P(sl): 1028.6,T(DHT22): 13.7 H: 45.4,T(DS18B20): 14.0 BME280: T: 15.2 P: 1028.3 H: 42.8
07:47:11 T(BMP180): 14.0 P(sl): 1028.7,T(DHT22): 13.7 H: 45.4,T(DS18B20): 14.0 BME280: T: 15.2 P: 1028.3 H: 42.7
07:47:21 T(BMP180): 14.0 P(sl): 1028.5,T(DHT22): 13.7 H: 45.5,T(DS18B20): 14.0 BME280: T: 15.2 P: 1028.3 H: 42.6



A copy of the code you are using will help.

Jim
Edited 2019-09-17 08:01 by TassyJim
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