openWB Embedded software replacement

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Replacement for the OpenWB software, when evcc runs directly on the OpenWB hardware. Currently supported Hardware is OpenWB Series2. mA control is used automatically if the EVSE firmware supports it.

Please be aware that installing evcc on the OpenWB Hardware will void your guarantee!

Installation without display:

Install and configure Raspberry Pi OS Lite (64bit) image.

Add the following at then end of /boot/firmware/config.txt:

[all]
gpio=4,5,7,11,17,22,23,24,25,26,27=op,dl
gpio=6,8,9,10,12,13,16,21=ip,pu

Install evcc according to the manual.
Add the groups required for user evcc to access the hardware: usermod -a -G gpio,dialout,input evcc
Configure evcc according to the manual. There are multiple distinct Hardware versions, which differ regarding the built-in modbus adapters and charge meters.
- A single or multiple Modbus adapters are found at /dev/ttyUSB0, /dev/ttyUSB1 (some Duo) or /dev/ttyACM0. Some Duo's contain two Modbus adapters, some just one.
- The EVSE for the first connector has always the ID 1, the one for the second ID 2.
- The different possible charge meters are:
  - Bernecker Engineering MPM3PM (template: mpm3pm) with ID 5 or ID 6 for the Duo's second connector.
  - SDM630/SDM72 (template: eastron) with ID 105 or ID 106 for the Duo's second connector.
  - ABB B23 (template: abb-ab) with ID 201

Additional steps for showing evcc on the display (be careful, because this will allow anybody to enable charging!):

apt install labwc wayfire seatd xdg-user-dirs firefox swayidle wlopm

Create the file /home/pi/.config/labwc/autostart with the following contents:

/usr/bin/firefox --kiosk http://localhost:7070/ &
/usr/bin/swayidle -w timeout 600 'wlopm --off \*' resume 'wlopm --on \*' &

Create file /home/pi/.config/systemd/user/kiosk.service with the following content:

[Unit]
Description=Start Kiosk mode
[Service]
Type=simple
ExecStart=/usr/bin/labwc
[Install]
WantedBy=default.target

Enable autostart of kiosk mode: systemctl --user enable kiosk
As root: Enable start of systemd user units without the user having to log-in: loginctl enable-linger pi

At https://github.com/evcc-io/images complete images for both variants are available.

Supported features

mA regulation: Finer charging current regulation (mA instead of A) for better solar surplus use.
RFID: Integrated RFID card reader for vehicle identification.
1P/3P: Automatic phase switching. Useful for solar surplus charging.

Parameters

Modbus

Name	Description	Value	Level
`id`	Modbus ID Default: `1`	int	required
`device`	Device name USB-RS485 adapter Example: `/dev/ttyUSB0`		required
`baudrate`	Baudrate Default: `9600`		required
`comset`	ComSet Communication parameter for the adapter Default: `8N1`		required
`host`	IP address or hostname Example: `192.0.2.2`		required
`port`	Port Default: `502`	int	required
`phases1p3p`	Phase switching Device is equipped with phase switching option Default: `false`		optional
`rfid`	RFID card reader USB VID:PID RFID card reader USB VID:PID value (as be obtained from lsusb), leave empty for no RFID card reader Example: `413d:2107`		optional
`cpwait`	Duration of CP interruption when phase-switching and waking up car. Minimum 5 seconds. Default: `10s`		advanced
`connector`	Connector number For multi-connector stations. Numbering starts at 1. Default: `1`		advanced

Configuration example for evcc.yaml

If you don't want to configure via the UI, you can alternatively use this YAML block.

chargers:
    - name: my_charger
      type: template
      template: openwb-native

      # RS485 via adapter (Modbus RTU)
      modbus: rs485serial
      id: 1
      device: /dev/ttyUSB0 # USB-RS485 Adapter Adresse
      baudrate: 9600 # Prüfe die Geräteeinstellungen, typische Werte sind 9600, 19200, 38400, 57600, 115200
      comset: "8N1" # Kommunikationsparameter für den Adapter

      # RS485 via TCP/IP (Modbus RTU)
      modbus: rs485tcpip
      id: 1
      host:  # Hostname
      port: 502 # Port
      phases1p3p: false # Phase switching, Device is equipped with phase switching option (optional)
      rfid: 413d:2107 # RFID card reader USB VID:PID, RFID card reader USB VID:PID value (as be obtained from lsusb), leave empty for no RFID card reader (optional)
      cpwait: 10s # Duration of CP interruption, when phase-switching and waking up car. Minimum 5 seconds. (optional)
      connector: 1 # Connector number, For multi-connector stations. Numbering starts at 1. (optional)