SinusPro 800 UPS - Integration into Home Assistant and data reading via microcontroller

Hello,
I have a sinusPro 800 (https://voltpolska.pl/zasilanie-awaryjne/sinus-pro-800-w-12-230v-500-800w-zasilacz-awaryjny.html) running, it works nicely as a UPS for the cooker and a couple of smaller toys. I would like to "extract" data from it (like voltage, current, load, mode, etc) and hook it up to Home Assistant. My idea is to plug some microcontroller board (Wemos or other Arduino) into the UPS and read this data.

Has any of you tried something like this? I haven't disassembled the device yet, and there's very little information on the web about the board, sockets, interface, data decoding - I'll probably be tempted to figure it out, but if someone has already worked this out then there's no point in knocking down an open door about rediscovering America

Thanks in advance!

Have you been able to do anything? I am also interested in automation but of a different model

Unfortunately no...