[APP][Pro] Eplucon Smart Control

[Kenny_S]

Solved!!!

Eplucon Portal Currently Offline

The Eplucon Portal is currently offline, which means that Heatpump Smart Control is temporarily unable to communicate with your heat pump.

Since the app relies on the Eplucon Portal, it is currently unable to retrieve live data or send commands to the heat pump.

This is not an issue with the Homey app itself, but an outage affecting the external Eplucon service.

Once the portal is available again, the integration should automatically resume normal operation. There is no need to reinstall the app.

Thank you for your understanding!

[Kenny_S]

Changelog – v1.7.3

• Improved reliability: Fixed potential conflicts between manual boosts, monitoring cycles and configuration updates.

• Safer hot water control: Prevented unintended Legionella boosts when the feature is disabled.

• Energy monitoring: Prevented duplicate measurements and energy calculations.

• Error handling: Improved recovery from communication and monitoring errors.

• Homey compatibility: Fixed device image paths to resolve potential installation issues.

Existing settings, devices, Flows and energy history are preserved.

[Albert_Jochems]

Is there a way that I can use this app with a local Modbus connection to my heatpump?

I have deliberately stayed away from connecting my Ecoforrest to the cloud…

[Kenny_S]

Hi @Albert_Jochems,

as far as I know there is no out of the box OEM solution to connect the heat pump with Modbus. I know there are some forums explaining how to do this the DIY way, but this is not (yet) supported in this app.

The cloud connection works quite stable, after and during the PHP issues there was a longer period of instability, but normally its no problem.

Do you have your HP connected with Modbus, I do find this DIY option interesting but since I don’t have in in place I cannot develop/test it.

Remark though: I will never make the heat pump fully controllable since this can cause damage to your heat pump when not done carefully.

[JaccoStraaijer]

Kenny, I have a strange problem. See screenshot. Any idea?

Cheers,

Jacco

Error report:

818ee127-5b41-44b7-b661-6368a6f156f0

[Kenny_S]

Heatpump Smart Control – Bug Report & Upcoming Fix

I have identified the cause of the error:

“Expected 96 quarter-hour prices; DST days require timestamped price data”

Root cause

The issue occurs when manually recalculating the hot water schedule. Currently, the “Recalculate Plan” button always attempts to calculate tomorrow’s schedule, even when tomorrow’s electricity prices are not yet available.

Day-ahead electricity prices are typically published in the early afternoon. If recalculation is requested earlier, the app receives incomplete or missing price data and incorrectly displays a daylight saving time (DST) error.

Planned bug fixes:

• Improve price availability checks before recalculating.

• Provide clear, user-friendly error messages instead of technical DST errors.

• Improve manual recalculation to distinguish between today’s and tomorrow’s schedules.

• Improve DST handling to support days with 92, 96, or 100 quarter-hour periods.

• Ensure temporary price-data unavailability is handled correctly without unnecessarily interrupting automatic scheduling.

Expected release

I will preparing a bugfix update for Heatpump Smart Control, which will most likely be available tomorrow, October 31.

Thank you for reporting this issue and helping to improve the app!

[JaccoStraaijer]

Sorry Kenny! I should have added the use case. Will do next time, but you are correct it is indeed when recalculating.

[Albert_Jochems]

My intention is to connect with a Modbus to Ethernet gateway. And the key things I would like to control for now is the warm water setpoint, to optimise my energy usage.

While thinking about it a bit more…Maybe it is easier to do this with an RPi based Modbus > MQTT bridge!

[Kenny_S]

The exact use case u described is the reason I developed this app.

Why not just use the cloud?

[Kenny_S]

Heatpump Smart Control – v1.7.7 (since v1.7.2)

This update focuses on full Dutch/English localization, dark mode, a cleaner settings interface, and improved reliability and safety of hot water control.

Release Notes

Dutch & English Support

• Added Dutch and English translations throughout the settings interface and all four widgets.

• Translated Homey device capabilities, sensor descriptions and operating mode labels.

• The interface automatically follows the language selected in Homey.

Dark Mode & Interface Improvements

• Added automatic light/dark theme support to the settings page.

• Improved text contrast, spacing and readability.

• Standardized input field widths and left alignment.

• Reduced excessive explanatory text throughout the settings.

• Detailed technical information remains available through expandable “More details” sections.

• Existing app icons, device images and widget graphics remain unchanged.

Improved Hot Water Control

• Added separate permissions for manual and automatic domestic hot water (DHW) control.

• Manual thermostat, widget and Flow commands can remain enabled while automatic boost scheduling is disabled.

• Added a fully read-only mode that blocks all DHW setpoint writes from the app.

• Improved the display of configured versus physically confirmed boiler setpoints.

Electricity Prices & Scheduling

• Improved handling of daylight saving time transitions.

• Correctly supports days containing 92 or 100 quarter-hour intervals.

• Uses absolute timestamps to prevent incorrect tariff allocation during clock changes.

• Rejects ambiguous price data instead of using potentially incorrect values.

Widget Performance

• Home and Hot Water widgets now refresh every 20 seconds while visible.

• Immediate refresh when returning to a widget.

• Reduced unnecessary and overlapping status requests.

• Faster physical setpoint confirmation remains available when required.

Bug Fixes & Reliability

• Legionella verification: Corrected the confirmation threshold to the configured target minus 3°C. For example, a 63°C setpoint requires a measured temperature of at least 60°C for successful confirmation.

• Boost synchronization: Fixed potential conflicts between manual boost commands and background monitoring.

• Configuration saving: Prevented simultaneous configuration updates from overwriting previously confirmed settings.

• Disabled Legionella protection: Prevented forced or previously queued Legionella cycles from starting when automatic protection is disabled.

• Read-only protection: Closed remaining write paths that could otherwise issue DHW commands while write permissions were disabled.

• Monitoring reliability: Operating-mode timeout errors no longer interrupt independent heat pump monitoring.

• Widget communication: Prevented overlapping requests and unnecessary polling when widgets are not visible.

• Localization: Corrected untranslated Dutch labels and inconsistent terminology in the English interface.

• Settings layout: Fixed inconsistent input alignment and improved readability on smaller screens.

Compatibility & Important Notes

Existing Homey devices, Flows, configuration and energy history are preserved.

Important: Please review the new DHW write permissions under Settings → Boiler after updating, especially if you use manual temperature control or corrective Flows. Automatic and manual control can now be configured independently.

[Kenny_S]

Changelog – v1.7.12 (since v1.7.7)

Electricity Prices & Reliability (v1.7.12)

• Fixed incorrect date handling of external Nord Pool electricity prices when the price table updates but its timestamp still refers to the previous day.

• Added validation against the current quarter-hour price to prevent using outdated tariffs.

• Added a fallback for displaying the current electricity price when the full price table is unavailable.

• Hot-water scheduling and energy cost calculations continue to use only validated price tables.

• Updated all eight Homey widget previews with transparent light/dark artwork.

Hot Water Planning (v1.7.10–1.7.11)

• Added correct same-day scheduling for planning times between 00:00 and 11:45.

• Only future quarter-hour slots are considered when scheduling for the current day.

• Planning times from 12:00 onwards continue to schedule for the following day.

• Changed the default planning time to 03:00 for new installations.

• Existing installations retain their previously configured planning time.

• Improved manual recalculation to select the correct planning date.

Planning History & Diagnostics (v1.7.9)

• Added a detailed 30-day hot-water planning decision log.

• Records planned temperature, predicted energy consumption, heating duration, expected savings and cancellation reasons.

• Added JSON export for troubleshooting and analysis.

• Improved explanations of planning decisions and scheduling times.

Homey Device Improvements (v1.7.8–1.7.10)

• Added a selectable current electricity price indicator (€/kWh) to the Energy Prices device.

• Added an optional Sensor mode for the main Heatpump Smart Control device, allowing additional temperature and pressure values to be selected as Homey tile indicators.

• Existing devices remain Thermostats by default. Switching device class requires explicit confirmation.

Interface & Translations (v1.7.7)

• Added Dutch and English translations throughout settings and all four widgets.

• Improved light and dark theme support.

• Reorganized settings with consistent alignment and expandable explanations.

• Improved translations of Eplucon sensor names.

Compatibility

• Existing device identities, energy history, widgets and app Flow cards are preserved.

• No changes to heat-pump control safety limits or Legionella temperature safeguards.

• Additional regression tests improve reliability across missing prices, midnight transitions and daylight-saving changes.

[Albert_Jochems]

Because I want to limit all connections of hardware to the cloud to an absolute minimum. In particular critical infrastructure like my heatpump, temperature control system, light controls, camera systems and battery system. Because:

• I don’t automatically trust each of these providers. In particular companies that have no history in IT solutions (Like Ecoforrest or Eplucon).
• I don’t want to end up with hardware that I can’t control anymore because the cloud services don’t exist anymore,
• I don’t want to be confronted with a supplier charging a monthly fee for being able to use my equipment

So I use:

• Victron local control for my battery system
• my Hue system not connected to the cloud
• Unifi camera system with local storage, and no cloud access
• a temperature control system from Busch Jaeger that runs 100% local

I can control all this via a VPN into my home. No Cloud access needed.
I have chosen to trust the Homey platform to control some things via the Cloud, and have further secured this with every possible means that my Unifi router provides.

A long answer to your question…

[Kenny_S]

I completely agree with you!

One of the main reasons for choosing Homey is exactly that: local control and reducing dependency on cloud services.

Especially for essential equipment like a heat pump, I believe it should remain fully operational and controllable without relying on an external cloud service. You never know whether a provider will change its policies, introduce subscription fees, or discontinue its services altogether.

That’s also why I’m currently working on adding Modbus support to Heatpump Smart Control. The goal is to communicate directly with the heat pump over the local network, without depending on the Eplucon cloud.

It’s still in development, and I need to verify compatibility with different heat pump models and configurations, but local control is definitely something I want to support!

[Kenny_S]

Heatpump Smart Control v1.8.3 – Major Homey App Update

A major new version of Heatpump Smart Control is here!

Version 1.8.x introduces optional local Modbus support, improved energy monitoring and several reliability improvements.

New: Combined Modbus + Eplucon API Device

Users can now choose between two device types:

• Eplucon API: The existing cloud-based integration, fully supported.

• Modbus + API: A combined Homey device using local Modbus measurements alongside Eplucon API functionality.

With Modbus, technical data such as temperatures, compressor speed, pump status, pressures and operating modes is retrieved directly from the heat pump.

The Eplucon API remains responsible for room thermostat control and setpoint adjustments.

Modbus is completely optional. Existing API-only installations continue working as before.

Improved Energy Monitoring

The five virtual energy meters (Heating, Cooling, Hot Water, Boost and Standby) now automatically select the most appropriate data source.

• Local Modbus operating data is preferred when available.

• Automatic fallback to Eplucon API data.

• Physical electricity meters remain the source for actual power consumption (W and kWh).

Improved Settings and Diagnostics

• Automatic detection of the installed device type.

• Separate connection indicators for Modbus and Eplucon API.

• Clearer information about active measurement sources.

• Improved sensor configuration and diagnostics.

Simplification and Reliability

• Simplified technical diagnostics.

• Improved Modbus connection handling and error messages.

Compatibility

Existing Eplucon API users do not need additional hardware or configuration.

Modbus users can use a single combined device instead of installing separate API and Modbus devices.

Please note: The Eplucon cloud connection is still required for thermostat control. Local Modbus measurements remain available independently of the cloud connection.

When replacing an existing Homey device, check any Flows referencing the previous device, as Homey does not automatically transfer device references.

Version 1.8.3

This release brings Heatpump Smart Control closer to a local-first integration, while preserving compatibility with existing Eplucon installations.

Thanks to everyone testing the app and sharing suggestions!

[Kenny_S]

Version 1.8.15 – New Setup Wizard & Eplucon Connect Support

This major update introduces a completely new setup experience, support for Eplucon Connect, and more flexible heat pump connectivity.

New Setup Wizard

• Guided installation with automatic connection detection and validation.

• Three connection options:

  1. Eplucon e-control – Existing cloud API integration with monitoring and supported controls.

  2. Eplucon Connect – New integration for Connect heat pumps and thermostats, currently read-only.

  3. Local Modbus TCP – Direct local communication with compatible Ecoforest heat pumps, without requiring an Eplucon account.

• Modbus can also be combined with either Eplucon cloud connection.

• Automatic discovery of available heat pumps and thermostats.

• Test connections before saving settings.

• Change connection types without re-pairing existing Homey devices.

Other Improvements

• New local web dashboard with live monitoring, interactive charts, forecasts and diagnostics.

• Improved Homey widgets and physical operating-mode detection.

• Smarter hot water planning and electricity price recommendations.

• Optimized Modbus readings, reduced memory consumption and simplified device capabilities.

• Improved reliability, data freshness handling and mobile layouts.

[JaccoStraaijer]

Kenny are you in future apps also integrating the WANAS WTW Eplucon offers? Thanks for this very nice app. Testing it in depth. Will let you know my results