Develco power meter reader

Hi I have a Develco HAN adapter that is used to read the norwegian powermeters.

the device registeres as a Develco Products A/S EMIZB-132, but the only data that comes out is 65535 both as voltage and current, there is also a switch there that doesnt do anything, can try to turn on, but nothing happens, and after a little while it is off again.

I tried posting in github but there was no reaction.

or is there another way of reading the HAN port from a norwegian powermeter so that I can follow the power usage.