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Nodemcu Bme280

Posted: 18 Apr 2017, 19:19
by helio58
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 ?

Re: Nodemcu Bme280

Posted: 18 Apr 2017, 19:33
by grovkillen
BME280 might be faulty? Try to calibrate it to find out or simply use %value%-6 as formula.

Re: Nodemcu Bme280

Posted: 18 Apr 2017, 19:55
by helio58
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

Re: Nodemcu Bme280

Posted: 19 Apr 2017, 20:07
by BertB
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

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