Hallo Zusammen
Ich konnte das Problem mit dem Shelly Support zusammen lösen. Folgende Anleitung war für mich die Lösung:
We recommend you reset your device and to include it be the steps below:
Please, keep in mind that Shelly H&T is a sensor and should be included under 3 minutes after turning it on, or the device will fall asleep.
Turn off your mobile data before inclusion and ensure that you connect the device to the 2.4Ghz network ( have in mind that your network security settings, should be at least WPA2 )
How to add the device to account:
1. Go to the WI-FI settings of your phone and connect to the Shelly network - shellyswitch-xxxxx
2. Open a web browser and load this IP on the search field - 192.168.33.1
3. Go to Internet &Security and click on WiFi Client Mode. There you must enter the Name (SSID) and password for your WiFi network. (You can add them by DHCP or with Static IP out of the DHCP range) .When you type them, press Connect.
4. Go back to the WiFi settings of your phone and connect to your home network.
5. Open the Shelly Cloud application and in 30 seconds you will see the room "Discovered Devices". Enter it and you will see your Shelly with its' ID.
6. Press on Click to add and type a name, select a room and a picture/icon, then press Add Device.
7. You will be prompted if you want to connect your device to the Shelly cloud service.
You can watch the video as well - https://www.youtube.com/watch?v=IKfdWQxHLW0&t=2s