Simple flow to send commands to and receive events from a KEBA P30 wallbox

I use this flow to

• send commands to my KEBA P30X wallbox (eg. start RFID identified charging session)
• query data (eg. last charging session data)
• receive push events from the wallbox (eg. cable plugged in)

Config: set IP of your wallbox in both nodes named "Wallbox" (these are standard UDP nodes). No KEBA specific nodes needed.

Use flow 1 to send commands to the Wallbox (request reports, start RFID authorized session, send text to the wallbox display, ...)

Supported commands see the KEBA UPD programmers guide at https://www.keba.com/file/downloads/e-mobility/KeContact_P20_P30_UDP_ProgrGuide_en.pdf

Sending any one command links your wallbox to your node red server (valid till wallbox reboots). This is needed to receive push events.

Use flow 2 to receive data and events from the wallbox. There is a switch node with three outputs

1. "Reply": if you send a command (via flow 1), you get the result/reply here
2. "Info Energy Session": While active charging you get a msg every 1,6 seconds with a payload of the power consumption of the current charging session (Wh charged)
3. "Event": Events like "cable plugged in" or "session started" are received in realtime here

Possible use cases

• status display: charging state, actual current (in Ampere), energy charged (in Wh), ...
• automation: limit charging current to PV output
• automation: RFID simulation (start session via RFID without physical CARD)

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