I just installed an old BMP280 in combination with a DHT22. While the temperature of the BMP280 seems to be fine (0.3°C difference to the DHT22), the pressure is constantly measured as -30.04 hPa. Rebooting the system didn’t change anything.
Is the sensor just broken or could something different be the cause?
Oxidation? Connection? Old BMP280 ?
Just buy a new BME280 and plug it well.
That did the trick for me, had the same issue, negative airpressure.
New BME280 and works fine again.