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ravo68 · ‎13.11.2024

It seems that have the very same issue. The API gives the following response (a snippet): "feature": "heating.power.consumption.heating", ... "timestamp": "2024-11-13T15:50:16.121Z", ... "properties": { "day": { "type": "array", "value": [ 0.1, 9.6, 15.1, 20.8, 18, 16.4, 20.6, 20 ], "unit": "kilowattHour" The value 9.6 is from 10 nov, and the value 15.1 is from 9 nov (and so on) according to the Analysis page Viessman app. So, I miss the daily values from 11 nov and 12 nov. The today's value is 0.1 which does not change.

ravo68 · ‎13.10.2024

Hi, My guess is that it is not in the API as it is a calculated value. There are good reasons to keep an API as clean as possible. A possible solution (a Ninja template as sensor in Home Assistant): {{ 1.162222 *(states('sensor.e3_vitocal_volumetrische_stroom') | float) * ((states('sensor.e3_vitocal_voedingstemperatuur') | float) - (states('sensor.e3_vitocal_retourtemperatuur') | float))}} in which the constant 1,162222 is the specific heat capacity of water (4184 Joules/kg/K) divided by 3600 s. example: Analysis as in the app

ravo68 · ‎13.10.2024

Hello Jörg, My choice was this solution: the Current value (kW) is the time derivative of the summary values (kWh) For Home Assistant, there is an integration available for this purpose: https://www.home-assistant.io/integrations/derivative/ The values I obtained corresponded quite well with those shown ViCare app. (I am still testing this). If you need to code it, then you could just calculate the difference of two consecutive values and divide that by the time interval. With kind regards, René

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