The serial number of your tado° devices can be found:
In the app:
Go to Settings > Devices. The serial number appears just below the device name on the list.
On the side or back of the device:
You can also find other registration information like auth code and QR code here.
Storing registration information on the setup card
Every tado° device comes with
- a removable sticker containing the registration information, and
- a setup card.
Paste this sticker onto the setup card to keep your registration information handy.