SMA Sunny Webbox integration for Home Assistant

Note: Tested against:

• Sunny WebBox-20 (FW 01.05.08.R) using a Bluetooth connection with the inverter.
• Sunny WebBox-G1 (FW 01.52), G2 (FW 01.53) and K1 (FW 01.53) all using RS-485 connection with the inverter.

• Poll Sunny Webbox using rpc API v1.4
• Create HA sensors for all reported channels and sources, e.g.:
  • WebBox-20
    • Webbox summary ('My Plant') - 5 sensors
    • Inverter - 9 sensors
  • WebBox-G1
    • Webbox summary ('My Plant') - 5 sensors
    • Inverter - 18 sensors
    • Weather - 6 sensors
• Config Flow support (UI configuration) in addition to legacy configuration.yaml.

1. Add https://github.com/jpcornil-git/HA-sma to your custom repositories

1. Clone or download all files from this repository
2. Move custom_components/sma_webbox to your <ha_configuration_folder>, e.g. /home/homeassistant/.homeassistant/custom_components/sma_webbox
3. Restart HA and clear browser cache (or restart a browser); latter is required for new config_flow to show up
4. Add sma_webbox component using either:
   • config flow (Configuration->Integrations->Add integration, search for sma)
   • configuration.yaml see configuration example below.
5. Created entities will be visible in the Integrations tab and aggregated per device in the Devices tab.
6. Enable desired sensor entities via the Devices (structured view) or Entities tab (flat view).

# Example configuration.yaml
sma_webbox:
  ip_address: 192.168.1.109
  port: 34268
  scan_interval: 30

Note: Typically, only ip_address will be mentionned as illustrated below; I suppose that all devices are using UDP port default (34268) and a scan interval under 30s is probably meaningless as the webbox is not updating faster.

# Example configuration.yaml
sma_webbox:
  ip_address: 192.168.1.109

This script implements the main object used by HomeAssistant but can also be used as an independent script to:

• test interoperability with a given webbox before addition to homeassistant
• display data fetched from webbox in a terminal
• extend capabilities/debug issues outside of HomeAssistant

Note: Tested with/developped for python3.9 (mandated by HomeAssistant from 2022.1)

python3 custom_components/sma_webbox/sma_webbox.py <webbox ip_address>