Netatmo makes its weather station compatible with HomeKit.
As Netatmo announces today that the station can be integrated into Apple’s Smart Home Standard after an update. Siri can now answer questions about the current temperature or the CO2 content in the air, for example.
In addition, the measurement data generated by the Netatmo can be viewed in the Home App. Older versions of the station should be able to cope with the update. However, there are several different versions and the oldest one is probably not supported. Just check your app to see if the update is available.