dbus-goecharger

Integrate go-eCharger into Victron Energies Venus OS

Purpose

With the scripts in this repo it should be easy possible to install, uninstall, restart a service that connects the go-eCharger to the VenusOS and GX devices from Victron. Idea is inspired on @fabian-lauer and @trixing project linked below, many thanks for sharing the knowledge:

• https://github.com/fabian-lauer/dbus-shelly-3em-smartmeter
• https://github.com/trixing/venus.dbus-twc3

How it works

My setup (only relevant for this script)

• 3-Phase installation
• Venus OS on Raspberry PI 4 4GB version 1.1 - Firmware v2.84
  • No other devices from Victron connected
  • Connected to Wifi network "A"
• go-eCharger hardware version 2
  • Make sure in your go-eCharger app that api v1 is activated
  • Connected to Wifi network "A" with a known IP

Details / Process

What is the script doing:

• Running as a service
• connecting to DBus of the Venus OS com.victronenergy.evcharger.http_{DeviceInstanceID_from_config}
• After successful DBus connection go-eCharger is accessed via REST-API - simply the /status is called and a JSON is returned with all details A sample JSON file from Shelly 1PM can be found here
• Serial/MAC is taken from the response as device serial
• Paths are added to the DBus with default value 0 - including some settings like name, etc
• After that a "loop" is started which pulls go-eCharger data every 750ms from the REST-API and updates the values in the DBus

Thats it 😄

Restrictions

This script until now supports reading values from the go-eCharger. Writing values is supported for "Enable Charging", "Charging current" and "Max charging current". Control of go-eCharger by the victron system in "Mode" "Auto" is not supported for now and changing the value will have no effect.

Pictures

Install & Configuration

Get the code

Just grap a copy of the main branche and copy them to a folder under /data/ e.g. /data/dbus-goecharger. After that call the install.sh script.

The following script should do everything for you:

wget https://github.com/vikt0rm/dbus-goecharger/archive/refs/heads/main.zip
unzip main.zip "dbus-goecharger-main/*" -d /data
mv /data/dbus-goecharger-main /data/dbus-goecharger
chmod a+x /data/dbus-goecharger/install.sh
/data/dbus-goecharger/install.sh
rm main.zip

⚠️ Check configuration after that - because service is already installed an running and with wrong connection data (host) you will spam the log-file

Change config.ini

Within the project there is a file /data/dbus-goecharger/config.ini - just change the values - most important is the deviceinstance under "DEFAULT" and host in section "ONPREMISE". More details below:

Section	Config vlaue	Explanation
DEFAULT	AccessType	Fixed value 'OnPremise'
DEFAULT	SignOfLifeLog	Time in minutes how often a status is added to the log-file current.log with log-level INFO
DEFAULT	Deviceinstance	Unique ID identifying the shelly 1pm in Venus OS
ONPREMISE	Host	IP or hostname of on-premise Shelly 3EM web-interface

Usefull links

• https://github.com/goecharger/go-eCharger-API-v1
• https://github.com/victronenergy/dbus_modbustcp/blob/master/CCGX-Modbus-TCP-register-list.xlsx
• https://github.com/trixing/venus.dbus-twc3

Discussions on the web

This module/repository has been posted on the following threads:

• https://community.victronenergy.com/questions/128552/go-echarger-integration-in-venus-os.html