Custom Integration: Sonnenbatterie

I still have no succes implementing sonnen batterie on HA

ip address is 172.16.172.xxx (which is private i suppose)

I remove RJ45 network cable (as proposed above) from the Smart eGrid box (the supplement cable, and not on the box itself)

I have put the battery cable in my network hub
But I don’t get an IP-address from my network via https://find-my.sonnen-batterie.com/
I tried 2 passwords,

  1. the one from my battery
  2. the one I received from [email protected]

But still no success