@ajb2k3 Thanks for the answer :)

Hi everybody,
since a few days I am using the PM2.5 Air Quality Kit. I noticed that the values for temperature and humidity have nothing to do with the real conditions. For the temperature I measure values between 30 and 35 °C, for humidity values around 35%. Other sensors like Si7021, MCP9808 or HTU21D-F all have similar values. Is this generally a problem with the built-in SHT20 or is there a problem with my M5? Do others have a similar problem or measure similar values?