That’s exactly what I’m trying to do at the same time… I have an iPhone and have also temporarily disconnected the WLAN bridge from the power supply and thus established a direct connection via Bluetooth with prior unlock activation. This allows me to open and close the lock via Bluetooth with the app. This ensures that an ‘offline key’ and the slot number are stored in the iPhone.
I have already read out the backup and saved it in Application and at Yale I am already looking for the offline key and the slot number… unfortunately I haven’t got very far yet…