Froeling Lambdatronic Modbus

Home Assistant integration for Fröling Lambdatronic heating systems via Modbus (currently supports Modbus TCP only - maybe ).

🚀 Features

With this integration, you can:

• Read real-time sensor data from your Fröling heating system.
• Monitor boiler performance and operational parameters.
• Configure heating system settings directly from Home Assistant.

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💻 Requirements

To communicate with the heating system, you need a Modbus-to-TCP device.
This integration has been tested with the Waveshare RS232/RS485 to Ethernet Converter, but other Serial-to-Ethernet adapters should work.

🔧 Enabling Modbus RTU on the Boiler

To enable Modbus RTU on your Fröling boiler:

1. Navigate to Boiler Settings.
2. Click the user icon and enter code -7.
3. Adjust the following settings:
   • Settings > General Settings > MODBUS Settings > Modbus Protokoll RTU → Set to 1
   • Settings > General Settings > MODBUS Settings > Use Modbus Protokoll 2014 → Yes
   • Settings > General Settings > MODBUS Settings > Use COM2 as MODBUS Interface → Yes

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🛠️ Hardware Setup

I used a Waveshare RS232/RS485 to Ethernet Converter and connected RS232 to COM2 on the boiler.

Other Serial-to-Ethernet converters should work as well.

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📦 Installation

HACS (recommended)

• Ensure that HACS is installed in your Home Assistant setup.
• Search for "Froeling Lambdatronic Modbus" in HACS and install it.
• Restart Home Assistant.

Manual

• Download latest release.
• Copy the custom_components/froeling_lambdatronic_modbus into your Home Assistant custom_components folder.
• Restart Home Assistant.
• Add the integration via the Home Assistant UI.

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🛠️ Setup

• Open Home Assistant Settings > Integrations

• "+ Add Integration" and select "Froeling Lambdatronic Modbus"

• Fill out the configuration form

  • Enter a device name (Default: Froeling)
  • Hostname/IP of your Modbus TCP device
  • Port (Default: 502)
  • Update Interval (Default: 60s)
  • Select the components which are enabled on your unit
    • Currently available:
      Kessel (Boiler)
      Boiler 01 (DHW Boiler)
      Heizkreis 01 (Heating Circuit)
      Heizkreis 02 (Heating Circuit)
      Austragung (Feed System)
      Puffer 01 (Buffer)
      Zirkulationspumpe (Circulations Pump) ... More to come. If you're missing a component - let me know.

• Click the "OK" button

You want to visualize the gathered entities ?

Checkout Froeling Card - Also available via HACS

🧡 Contributing

Contributions are welcome!

1. Fork this repository.
2. Make changes within your fork.
3. Create a pull request.

I’ll do my best to review and merge contributions.