To be able to use addons in your CMe3100 you maybe need to upload a license.
If the device was bought with the addon you will not need to add it with a license.
Licensed addons is currently
* Rest API
* Increase the maximum numbers of slaves allowed in your meterlist, in these steps;
To upload a new license enter your webinterface and go to
System -> licenses -> upload new license file.
When the file is uploaded, press SAVE.
If successfull you will see all of your licenses.
Now the addons automatically will be installed and appear under configuration -> services