Schneider EVLink Wallbox with Modbus

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1

I’ve implemented a ModBus Switch for my Schneider Eletric EVlink and implemented four buttons to make specific configurations for the two cars in the household:

Buttons

Via modbus, the “PLC” value gets re-configured from the 63A (default value) to the appropriate value 10A (for Mercedes), 16A (for Mercedes) or 16A (for Renault Zoe) or 32A (for Renault Zoe).

So far so good. My question to the forum is:
How could I start or stop charging of the connected car via Modbus?
I only know how to automate this step via OCPP protocol yet, but I would also like Modbus for this.

Another topic would be: how could I get knowledge about which car is connected, so I may only provide the two appropriate icons for the specific car type within the Dashboard.

Greetings
Achim

configuration.yaml:
modbus: !include modbus.yaml

modbus.yaml:

- name: EVSE
  type: tcp
  host: wallbox.local
  port: 502
  sensors:
  - name: "Wallbox Maximum PLC"
    unique_id: evlink.imax_plc
    address: 67
    unit_of_measurement: A
    slave: 255

Within Dashboard:

title: Wallbox charge speed
type: horizontal-stack
cards:
  - type: custom:button-card
    name: 2 * 10 A<br>4,6 kW
    icon: si:mercedes
    tap_action:
      action: call-service
      service: modbus.write_register
      service_data:
        hub: EVSE
        address: 67
        slave: 255
        value: 10
      target: {}
    color: var(--paper-item-icon-color)
  - type: custom:button-card
    name: 2 * 16 A<br>7,4 kW
    icon: si:mercedes
    action:
      action: call-service
      service: modbus.write_register
      data:
        hub: EVSE
        address: 67
        slave: 255
        value: 16
      target: {}
    color: var(--paper-item-icon-color)
  - type: custom:button-card
    name: 3 * 16 A<br>11 kW
    icon: si:renault
    tap_action:
      action: call-service
      service: modbus.write_register
      data:
        hub: EVSE
        address: 67
        slave: 255
        value: 16
      target: {}
    color: var(--paper-item-icon-color)
  - type: custom:button-card
    name: 3 * 32 A<br>22 kW
    icon: si:renault
    tap_action:
      action: call-service
      service: modbus.write_register
      data:
        hub: EVSE
        address: 67
        slave: 255
        value: 32
      target: {}
    color: var(--paper-item-icon-color)
1 Like
2

nice work, is there a standard HA integration that works with the Schneider EV link boxes?
I have one installed at home and would love to get some data from it

3

Hello,

Very interesting project. @AchimHome Where did you by this Modbus switch ?
I have an EVLink Home Smart Wallbox and want to customise the appropriate Ampere value that I want to push on my car.

4

@AchimHome I just found this post. I have an EVlink Smart Wallbox from about 6 years ago, and I’m trying to play with MODBUS control directly.

Where did you find the MODBUS register mappings? Are they documented anywhere?

Setting address 67 to an integer value sets the current limit, as per your configuration. But I can’t work out which register contains the actual charging current, or make sense of any of them really.

I note that the new EVlink Pro has MODBUS documentation, but the addresses don’t seem to match the old EVlink Smart Wallbox.

Thanks!