BMP280 give wrong temp at below o

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c0ding4fun · #1 Post by **c0ding4fun** » 11 Feb 2017, 09:48

The BMP280 shows in the transition to frost a wrong temperature value. The measured value jumps nearly 2 degrees up.

dzikus · #2 Post by **dzikus** » 11 Feb 2017, 14:03

c0ding4fun wrote:The BMP280 shows in the transition to frost a wrong temperature value. The measured value jumps nearly 2 degrees up.

I also had too high readings and I think that error is from continuous measurement in Bosch sensor so I set standby 1000ms (and some other settings) in this commit https://github.com/letscontrolit/ESPEas ... 25e985955a and my reading now are correct.

I tested it on my BMP280 and on my BME280 they both show now values close to my reference ds18b20 (before that commit 1-2 degrees up).

c0ding4fun · #3 Post by **c0ding4fun** » 12 Feb 2017, 20:14

Sorry, did not work. Same issue: going below zero a jump to 1.6 C.

Thanks for your reply do

Dodfr · #4 Post by **Dodfr** » 13 Feb 2017, 17:23

sorry wrong reading... deleted my comment.

Ruprecht · #5 Post by **Ruprecht** » 14 Feb 2017, 11:49

With my outside temperature sensor on the chart is in the morning a jump at minus 2.1 degrees to zero and then again a jump at minus 2.1 degrees:

Could this be caused by an incorrect formula calculation from ESPEasy because I also correct the temperature measurement value with this formula:

BMP280 give wrong temp at below o

BMP280 give wrong temp at below o

Re: BMP280 give wrong temp at below o

Re: BMP280 give wrong temp at below o

Re: BMP280 give wrong temp at below o

BME280 delivers below zero also false temperature value

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