Supported smartmeter / Information about data format as retrieved from http url

[mar1ged]

First things first: you might want to add the Itron Openway 3.HZ-AC-D1-A1 to the list of supported smartmeters. My provider "Netze BW" of EnBW installed it and as far as I can tell it works just fine (with an Hichi USB reader):

My smartmeter does not expose 2.18.0. I don't know if this due the fact that I don't have a contract about "Einspeisevergütung". But what is more interesting is that I can see I'm producing more than I consume because the value returned is prefixed with a minus:

Now to the longer story. I installed ioBroker and the smartmeter adapter on an old Raspberry Pi 1. I decided to do this because I wanted to recycle the old hardware, and learn something (especially getting to run NodeJS 18 running on the device was "interesting") But one can see that the hardware is a little bit "overwhelmed" and especially after a restart of the device it takes a lot of time until everything is up and running.

So I though about installing something lightweight on the Raspberry Pi 1 that reads from the smartmeter, have this expose the data via http (or tcp ?) and install the smartmeter adapter on my main iobroker server. But I haven't found information which http or tcp format is expected by the adapter. Can you give me a hint ?

[Apollon77]

HTTP only one format is supported - the format of the EFR Smart Grid Hub (JSON format)

TCP is "smae formats as Serial" (so D0 or SML), but via TCP without baudrate switchover and such stuff

[mar1ged]

Thank you @Apollon77 . Does this mean I could just grab the output of dev ttyUsb and export it over a socket without the need of any conversions ?

[Apollon77]

Honestly ... this all highly depends on your smartmeter and siuch ... best use iobroker forum and discuss options with users there.

[mar1ged]

OK, I will do so. Or just give it a try.