To control Netatmo products with Siri or Apple HomeKit, you need to be using the same Wi-Fi network or have a HomeKit hub installed.
Read this article for more information about using remote controls.
Home data might not be synchronised with your iCloud account:
- Unplug the Netatmo Relay, wait at least ten seconds, then plug it back in.
- Check that Keychain is activated in Settings > User account > iCloud.
- Check that the Home app is activated in Settings > User account > iCloud.
- Wait for iCloud to synchronise.
- Restart the iOS device(s).
If none of these methods work, reinitialise the Relay. See How to reinitialise my Relay then complete the installation again.