64 lines
4.4 KiB
Markdown
64 lines
4.4 KiB
Markdown
# Door/Window Open Detection
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- [Door/Window Open Detection](#doorwindow-open-detection)
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- [Sensor Mode](#sensor-mode)
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- [Auto Mode](#auto-mode)
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You must have selected the `With Open Detection` feature on the first page to reach this page.
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Open detection can be done in two ways:
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1. By using a sensor placed on the opening (sensor mode),
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2. By detecting a sudden temperature drop (auto mode)
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## Sensor Mode
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To switch to sensor mode, you need to provide an entity of type `binary_sensor` or `input_boolean`.
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In this mode, you need to fill in the following information:
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1. A **delay in seconds** before any change. This allows you to open a window quickly without stopping the heating.
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2. The action to take when the opening is detected as open. The possible actions are:
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1. _Turn off_: the _VTherm_ will be turned off.
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2. _Fan only_: heating or cooling will be turned off, but the equipment will continue to ventilate (for compatible equipment).
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3. _Frost protection_: the "Frost Protection" preset temperature will be selected on the _VTherm_ without changing the current preset (see notes below).
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4. _Eco_: the "Eco" preset temperature will be applied to the _VTherm_ without changing the current preset (see notes below).
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When the detector switches to open:
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1. _VTherm_ waits for the specified delay.
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2. If the window is still open after the delay, the _VTherm_ state (Heating / Cooling / ..., current preset, current target temperature) is saved and the action is performed.
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Similarly, when the detector switches to closed:
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1. _VTherm_ waits for the specified delay.
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2. If the window is still closed after the delay, the state before the window opening is restored.
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## Auto Mode
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In auto mode, the configuration is as follows:
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1. A **delay in seconds** before any change. This allows you to open a window quickly without stopping the heating.
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2. A detection threshold in degrees per hour. When the temperature drops beyond this threshold, the thermostat will turn off. The lower this value, the faster the detection (with a higher risk of false positives).
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3. A threshold for ending detection in degrees per hour. When the temperature drop exceeds this value, the thermostat will return to the previous mode (mode and preset).
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4. A maximum detection duration. Beyond this duration, the thermostat will return to its previous mode and preset even if the temperature continues to drop.
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5. The action to take when the opening is detected as open. The actions are the same as in sensor mode described above.
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To adjust the thresholds, it is recommended to start with the reference values and adjust the detection thresholds. Some tests gave me the following values (for an office):
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- Detection threshold: 3°C/hour
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- No detection threshold: 0°C/hour
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- Max duration: 30 min.
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A new sensor called "slope" has been added for all thermostats. It provides the slope of the temperature curve in °C/hour (or °K/hour). This slope is smoothed and filtered to avoid aberrant thermometer values that could interfere with the measurement.
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To adjust it properly, it is recommended to display both the temperature curve and the slope of the curve ("slope") on the same historical graph:
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>  _*Notes*_
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> 1. If you want to use **multiple door/window sensors** to automate your thermostat, simply create a group with the usual behavior (https://www.home-assistant.io/integrations/binary_sensor.group/)
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> 2. If you don't have a door/window sensor in your room, simply leave the sensor entity ID empty.
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> 3. **Only one mode is allowed**. You cannot configure a thermostat with both a sensor and auto detection. The two modes might contradict each other, so both modes cannot be active at the same time.
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> 4. It is not recommended to use auto mode for equipment subjected to frequent and normal temperature variations (hallways, open areas, etc.).
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> 5. To avoid interfering with your current preset settings, the actions _Frost protection_ and _Eco_ change the target temperature without changing the preset. So, you may notice a discrepancy between the selected preset and the setpoint.
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> 6. If you use the Versatile Thermostat UI card (see [here](additions.md#even-better-with-the-versatile-thermostat-ui-card)), open detection is represented as follows: . |