Expert Mode, Login into the Web portal of the Smappee monitor; find the URL to your Smappee, using your APP.
In your Smappee App, navigate to "Main menu > Smappee" and you'll get the following information.
Click on the Serial Number of the installed Smappee device and you will find the current IP address of your Smappee device in your network as well as the URL to paste in your browser.
Open your browser and navigate to the given URL. Click the logon/logoff button and use the password "admin" to Logon.
Find the IP Address without the App?
Smappee's IP address can be found in your wifi router. The MAC address of Smappee starts with 7C:... and the hostname will be: smappee.
Navigate to the URL: http://X.X.X.X/smappee.html (replace X.X.X.X by Smappee's IP address in your network).
Find Smappee using mDNS.
Smappee supports mDNS, a multicast Domain Name System used to resolve host names to IP addresses within small networks that do not include a local name server.
Replace 1XXXXXXXXX with the serial number of your Smappee device. You'll find it on the sticker on the back of Smappee. Try the url with and without ".local". This depends on your OS and your local network configuration.