You should buy this module (I couldn’t find a Norwegian shop):
Kamstrup HAN-modul (RJ45 anslutning) Utomhusliv
Edit:
I mistakenly linked to an RJ45 model. the P1/RJ12 version is very hard to find.
But how about an alternative?
I found this interesting Norwegian HAN port wifi interface for the Kamstrup: https://www.amsleser.no/home/1-41-pow-k-han-port-reader-for-kamstrup-omnipower-meters.html.
You can read the values with wifi & MQTT. No Homey dongle needed. And it is also sold to DK, SE & AT (AUT).
With apps MQTT Broker App for Homey | Homey and MQTT Hub App for Homey | Homey you can create a virtual device, and configure it to receive all MQTT data from the HAN port reader
Available for these Kamstrup models:
Omnia E-meter
Omnipower 684xx2
Omnipower 684xx3
Omnipower 685xx2
Omnipower 685xx3
Omnipower 686xx1
382M
KB article:
https://support.homey.app/hc/en-us/articles/17233328965916-Compatibility-of-the-Homey-Energy-Dongle
