How to track your e-mail consumption energy in a smart home on three phases?

Question

Electronics

There is a country house where three phases come. Consumers are evenly spread over these phases. Smart home is represented by homeassistant, arduino, xiaomi, sonoff.
I want to see the total electricity consumption of the house (ideally for each phase), build graphs, choose time intervals, integration with homeassistant, or well-documented opportunities to collect information.
What piece of iron do you recommend?

Answer 1

All the same, I think that a meter should monitor consumption (for example, Energomera CE303), reading data from meters is possible without passwords, IEC 61107 protocol . Now almost all new meters work according to this protocol for ease of integration into AMR systems. Take this DSMR as a basis and write its analogue for IEC61107