Data from Wallbox car charger

[thomasbaetge]

same here.
No 'cloud' or internet service involved, everything is running locally, even my Solar inverter is blocked from the internet.
Outside access only via VPN.

As for the hardware, if it requires regular internet access or comes with some chinese app, I simply don't buy it.
Bonus point, as long as I have electricity, everything will just work.

[thomasbaetge]

A quick update on this one.
I wanted to implement solar excess charging for my car and quickly reached the limits of the OCPP protocol, which is -in my mind- the most stupid protocoll ever.
I decommisioned all of it, got me the modbus documentation from the manufacturer (Schneider SE) and started from scratch with modbus.
I am happy to report, that it took only half the effort compared to OCPP and every detail is now under control including real time data.

Bottom line: if your box has both options, don't bother to try OCPP. Just go for modbus.

[sincze]

A quick update on this one.
I wanted to implement solar excess charging for my car and quickly reached the limits of the OCPP protocol, which is -in my mind- the most stupid protocoll ever.
I decommisioned all of it, got me the modbus documentation from the manufacturer (Schneider SE) and started from scratch with modbus.
I am happy to report, that it took only half the effort compared to OCPP and every detail is now under control including real time data.

Bottom line: if your box has both options, don't bother to try OCPP. Just go for modbus.

Tell me how and when #interested.

[thomasbaetge]

Like in the shelly thread, with Node-Red, which has been my weapon of choice for some years now...
It provides modbus nodes for r/w access so you can easily get into things.
However, the details depend on the box manufacturers specs for the rgisters, so the implementation is device specific.

The things I implemented are
Read access for crucial data on the box (Box state, current power output)
Control of
max current (required for excess charging)
Start/Stop/Suspend charging via Domoticz (Selector switches used)
Integration PV control with charging (automation for excess production charging)