Nodemcu Bme280

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helio58
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Nodemcu Bme280

#1 Post by helio58 » 18 Apr 2017, 19:19

Hi,
I m using a Nodemcu with Bme280 esp easy mega v2.0.0-dev7.
Have connect Bme280 sda to D3 and scl to D4 .
I got wrong temperature difference +6 degrees celsius .
I read if using D3 and D4 no need of resistors.
Any suggestions ?
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grovkillen
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Re: Nodemcu Bme280

#2 Post by grovkillen » 18 Apr 2017, 19:33

BME280 might be faulty? Try to calibrate it to find out or simply use %value%-6 as formula.
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helio58
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Re: Nodemcu Bme280

#3 Post by helio58 » 18 Apr 2017, 19:55

grovkillen wrote: ↑18 Apr 2017, 19:33 BME280 might be faulty? Try to calibrate it to find out or simply use %value%-6 as formula.
Thanks grovkillen.
I m using the formula %value%-6.
I thought I was doing something wrong .
Thanks
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BertB
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Re: Nodemcu Bme280

#4 Post by BertB » 19 Apr 2017, 20:07

This tgemperature deviation is most likely caused by self heating, heating by surrounding electronics and insufficient air flow.
https://ae-bst.resource.bosch.com/media ... 001-11.pdf

page 10
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