documentation: marstek venus e 3.0 and hichi power meter

[soundart]

Hi,

I am currently using energy2shelly to convert the power readings of a hichi into a format usable for the marstek venus e 3.0.
I would like to discuss if the approach is valid and then update the documentation.

So what I did:

• use "HTTP" as data source, provide hichi URL
• Shelly UDP port 1010
• I have firmware v147 marstek venus e 3.0
• use "TRIPHASE" as Total power JSON path
• provided the Phase 1 power JSON path StatusSNS.reader.Power_curr
• Phase 2 power JSON path: 0.001
• Phase 3 power JSON path: -0.001

In the marstek app I choose:

• Shelly Pro 3EM
• and "Dreiphasen-Summe" or translated 3-phase sum
• modi "Eigenverbrauch" or translated maybe "self consum"

It looks as if it works! I will observe for some time. Do you see any drawbacks?

What did not work:

• Using mqtt as data input. The hichi sends the data to a mosquitto instance and I first tried to use that as data source. The additional delay resulted in a wildly oscillating behaviour.
• using the single phase Energy.Power in "Total power JSON path". The marstek app diagnosed something and was not happy.