Link to guide to setting up the Hildebrand with HA https://www.youtube.com/watch?v=r6M9czhUmtA
And on the subject of DNO data, there’s this https://github.com/HandyHat/ha-hildebrandglow-dcc Home Assistant integration that retrieves data direct from the DNO without needing the Hildebrand device.
I tried it for a while and in the end gave up with it. The data is just too lagged. You’d get consumption data maybe every 4 to 6 hours, but never aligned with real time, i.e. there would always be further catchup data needed.
I found my inverter electricity import/export data was accurate enough when compared to my Octopus account readings so worked out how to use that in the dashboard to give today’s pricing & consumption. Then some time later the Octopus mini arrived but I just left it on the inverter readings as it was accurate enough and I had the history preserved.