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opendata-stuttgart / sensors-software

sourcecode for reading sensor data
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BME280 temperature too high #1033

Open dr-ni opened 2 months ago

dr-ni commented 2 months ago

is my sensor broken or is the firmware not measuring correct?

https://github.com/arendst/Tasmota/issues/1051#issuecomment-1288423223

dr-ni commented 2 months ago

Bildschirmfoto zu 2024-04-28 16-40-09

ricki-z commented 2 months ago

Please check how the BME280 is positioned in the housing. The electronics generate heat that accumulates in the upper area. So try to mount the BME280 as near as possible on an opening.

dr-ni commented 2 months ago

I'll try next week... But can the method above help to reduce the temperature? I'm also searching the reason why dht22 humidity always is 99.9%

ricki-z commented 2 months ago

The high humidity values are a known problem with the DHT22 when used outdoors. Its some kind of saturation. This is also a reason why we switched to the BME280. There are many BME280 in our network, especially in Bulgaria. We haven't heard about this problem with our firmware before. As we started using the BME280 we had a similar problem and switched to the recommended settings for the BME280 when used as a "wather station".

dr-ni commented 2 months ago

ah ok, so this is not helping a long time?

https://forum.arduino.cc/t/arduino-uno-dht22-humidity-99-9/225361/15

ricki-z commented 2 months ago

As you can see in the article the humidity is going up again to 99% when the sensor is cooling down. So the problem isn't really solved by this. And having around 50 °C all the time wouls be replacing one problem with another ...