This service is meant to be run with Venus OS from Victron; e.g. on a Cerbo GX.

The Python script cyclically reads data from the GS303 SmartMeter via Tasmota JSON and publishes information on the dbus, using the service name com.victronenergy.grid. This makes the Venus OS work as if you had a physical Victron Grid Meter installed. Since the GS303 gives only the sum of power and not the power, voltage and current for each phase, these are calculated.

In the config.ini file, you should put the IP of your Tasmota device that reads the GS303.

1. Create a subfolder under /data named dbus-gs303-smartmeter on your venus.
2. Copy all files and the service folder to the /data/dbus-gs303-smartmeter folder.
3. Set permissions for the install.sh file: chmod a+x /data/dbus-gs303-smartmeter/install.sh
4. The daemon-tools should automatically start this service within seconds.

When you think that the script crashes, start it directly from the command line:

python /data/dbus-gs303-smartmeter/dbus-gs303-smartmeter.py

and see if it throws any error messages.

If the script stops with the message dbus.exceptions.NameExistsException: Bus name already exists: com.victronenergy.grid it means that the service is still running or another service is using that bus name.

If you want to restart the script, for example after changing it, just run the following command:

/data/dbus-gs303-smartmeter/restart.sh

The daemon-tools will restart the script within a few seconds.

In my installation at home, I am using the following Hardware:

• Fronius Symo - PV Grid Tied Inverter (three phases)
• GS303 Smartmeter - (three phases)
• ESP32 with Tasmota Firmware with SML Decoder an IR Transistor Receiver
• Victron MultiPlus - Battery Inverter (single phases)
• RPI running Venus OS
• Battery