The number of compressor starts have been added to the capabilities. This can be a good indication of the health(lifespan) of the heat pump. Some display handling has been done for unsupported capabilities. A nice ‘-’ is displayed instead of -32768.
We have also added support for heat pumps with the WPM 3i protocol. And renamed all devices to their supported protocol. Currently there are three supported protocols (devices):
WPMSystem / WPM 4
This is the current standard for modern, modulating (inverter) systems and offers the most integration options.
Supported Series:
WPL-A 07/10/13 HK Premium: The current flagship monoblock air-to-water series.
WPL 09/17 ICS/IKCS: Air-to-water heat pumps designed for indoor installation.
WPE-I 04 - 15: The latest inverter-driven brine-to-water units.
HSBC 200/300: Integral cylinder stations (these contain a WPMSystem controller internally).
WPM 3i (Build-in controller)
The ‘i’ stands for integrated. This controller is technically similar to the WPM 3 but is physically built into the housing of the heat pump unit itself.
LWZ/LWA Systems
Unlike the modular WPM systems, the LWZ protocol in the ISG provides access to specific ventilation parameters (such as fan stages and humidity levels) alongside standard heating curves.
Supported Series:
LWZ 303 / 403 Series
LWZ 304 / 404 / 504 Series (Better efficiency)
LWZ 5 & 8 CS Series (Modern inverter generation)
The device ‘ISG Web Interface (Old)’ is still there for legacy installs but ideally should not be used and might be removed later on.
If you are not sure what protocol your heat pump is using, install the WPMSystem / WPM 4 device. This is the latest protocol and used in the latest heat pumps. You can then check the Controller Type capability. It will display the supported protocol:
I have a small question, hopefully with a similar answer.
My heatpump can and will switch to cooling, when certain conditions are met. At the same time in my bedroom I want to close the floorheating when heating and open it when cooling. I want to get a message when the heatpump switches from heating to cooling and back.
For WPMSystem / WPM 4 heatpumps, runtimes have been added. You can now see how much time is spend on heating, cooling, heating water and the auxiliary heating in the winter.
I have a ISG Web myself and not the newer ISG Connect version. The Connect allows you to integrate with the Stiebel Eltron Cloud and App and is more secure (https vs http). What I hear is that the ModBus interface is the same and the Homey app works. However I cannot guarantee or test that it works, maybe other users can confirm it works correctly.
From what I understand, this integration currently only supports heating and cooling heat pumps over LAN(?)
Do you have any plans to support heat pump hot water systems as well? I’m planning to get the SHP-O 300 Plus which, as far as I can tell, is only accessible via the cloud/app over Wi-Fi? If that’s even possible.
Unfortunately not. The app only supports Heat pumps controlled by the ISG. This controller exposes a modbus interface to the local network. The SHP-O 200 Plus and SHP-O 300 Plus heatpumpboilers do not have this modbus interface and are connected to the MyStiebel App en de Servicewelt portal directly. The Homeassistant community is looking at the reverse engineering cloud API, but this is not yet available.
