What WB kit do I need?

[aiole]

2. is the preferred solution, but S0 is not recommended. Use SDM630_v2-counter for 1p/3p-charging with all values. Otherwise oWB don't get phasewise Amp.

[courage2000]

Ok, so I let my existing charging station (EvseWIFI) and use SDM630_v2 via modbus usb adapter -> RPI.

This is perfect, but WHERE in the settings I must setup this counter?

Modulkonfiguration
Ladepunkte - SimpleEVSE WIFI
EVU - Fronius Smart meter
PV - Fronius WR

[aiole]

The SDM counts the WB-power. So you have to connect & configure it in EWifi:

Therefore you need a cheap RS485/UART-converter to get A/B to Rx/Tx on ESP-µC.
OWB get WB-information by API from EWifi-WB.

In addition you need an EVU-counter. This the most important part of oWB. Do you use also a SDM630 for that?
It can be read from oWB with a RS485/LAN-converter.

[courage2000]

The EVU is a Fronius Smart meter

From https://github.com/CurtRod/SimpleEVSE-WiFi

**To use a Modbus electricity meter via RS485, you need a extra piece of hardware to translate UART to RS485. In this project a PCB like this is required. Set your meter to baud rate 9600 and slave ID to "002". Until now only SDM120 and SDM630 Modbus meters are supported! If you have another one you can use it with the S0 interface.

This has a broken link in this case.
I believe is this one?
https://www.evse-wifi.de/produkt/evse-w ... se-wb-din/

[aiole]

Ok - and you'll get it's values from a coupled Fronius-inverter over LAN?
If yes - oWB uses it directly from inverter.

I'm not sure if oWB can use values from Fronius Smartmeter directly. For SMA it works.

[courage2000]

yes, I hope I will get the EVU values from LAN.
The EVU is connected via RS485 to the Fronius Inverter.

[courage2000]

L.E.
I've deleted the content.
I'm very tired (small kid @ home) and I could not see the RX/TX pins on WeMos D1 mini to connect the modbus counter.

Here OpenWB reads via lan the EVU, but I will see if OpenWB will read via the Fronius Symo -modbus - Fronius Smart Meter.

[aiole]

First 2 pic show EWifi with 8266. Third pic. is an old version of openWB with directly coupled DAC. This is not recommended anymore.

You can't use UART + UART/485-converter on same Rx/Tx of 8266., so you can tune up EVSE with fhis:
https://board.evse-wifi.de/viewtopic.php?f=7&t=24
After that you put the 2 devices (EVSE + SDM) on a cheap 485/UART-converter A/B of 485-bus. It is connected to the Rx/Tx of 8266.

Better than 8266 is BASE-modul with integrated 485 + much more features + newest EVSE-Wifi-SW (actual v2.2.4).
https://board.evse-wifi.de/viewtopic.php?p=56#p56

Write a PN - maybe we can help you.

[courage2000]

From what I see NOW in the documentation, you can.

For Simple EVSE -> WeMos, D1 and D2 pins are used
For Modbus counter - UART adapter -> WeMos, TX and RX pins are used (different pins than D1 and D2).

===
With the proposed adapter, I would not use SimpleEVSE WIFi v1 (no pins left to connect on Simple EVSE)

[aiole]

OMG - I didn't know our own doc for v1.x. You're right - sry! I'm developing most on v2.x .
Ok, than you can use the 2x diff. UARTs like on your pic.

You only need the cheap UART/RS485-converter on HW-UART @Wemos-Rx/Tx for SDM630.
EVSE is connected to SW-UART @Wemos (D1, D2).