One phase voltage missing?

[dagbdagb]

Describe the bug
The web UI shows three phase currents, but only phase voltage L1 and L3.

To Reproduce
Steps to reproduce the behavior:

1. Go to web UI

Expected behavior
I'd expect to see an equal amount of currents and voltages.
Network is 3-phase 230V (TT)

Hardware information:

• Meter: Kaifa
• AMS reader: Pow-U

Relevant firmware information:

• Version: 2.0.2

Additional context
Network is 3-phase 230V (TT)

[dagbdagb]

So, this appears to be a result of the exact meter model not providing this voltage directly. MA304H3E will always report 0 for the L2 phase voltage. L2 must be calculated from L1 and L3. This URL spells it out:

https://www.hjemmeautomasjon.no/forums/topic/7543-ams-han-port-hvilke-verdier-m%C3%A5ler-de-foreskjellige-str%C3%B8mm%C3%A5lerene/

IIUIC:
L2 = sqrt( (L1 - 0.5*L3)^2 + (0.866*L3)^2 )

If I have ever learnt this, it is most definitely forgotten now. Hence, no clue about conditions for this calculation to be true.
But results do check out as 'sane'.

[gskjold]

Try this:
esp8266.zip

[dagbdagb]

Either my formula is wrong, or your implementation. L2 is currently reported as 463.29V.

[gskjold]

I kind of forgot how cos and sin works, lets try another one:
esp8266.zip

[dagbdagb]

The value for L2 looks sane now. Thanks.

[gskjold]

Awesome!