Binary sensors are gathering information about state of switches, contacts, pins, and alike. The return value of those sensors is usually digital (1/0). This means that those sensors knows only two states: 0/off/low/closed/false and 1/on/high/open/true.
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Knowing that there are only two states allows Home Assistant to represent the sensor better in the frontend.
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The display style of each entity can be modified in the customize section. The following device classes are supported for binary sensors:
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Binary sensors gather information about state of switches, contacts, pins, and alike. The return value of those sensors is usually digital (1/0). This means that those sensors knows only two states: 0/off/low/closed/false and 1/on/high/open/true.
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Knowing that there are only two states allows Home Assistant to represent these sensors in a better way in the frontend according to their functionality.
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The way these sensors are displayed in the frontend can be modified in the customize section. The following device classes are supported for binary sensors:
None: Generic on/off
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cold: On means cold (or too cold)
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connectivity: On means connection present, Off means no connection
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gas: CO, CO2, etc
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heat: On means hot (or too hot)
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cold: On means cold
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connectivity: On means connection present, Off means no connection
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gas: On means gas detected
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heat: On means hot
light: Lightness threshold
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moisture: Specifically a wetness sensor
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motion: Motion sensor
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moving: On means moving, Off means stopped
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occupancy: On means occupied, Off means not occupied
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opening: Door, window, etc. On means open, Off means closed
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power: Power, over-current, etc
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safety: On means unsafe, Off means safe
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smoke: Smoke detector
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sound: On means sound detected, Off means no sound
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vibration: On means vibration detected, Off means no vibration
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moisture: On means wet
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motion: On means motion detected
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moving: On means moving, Off means stopped
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occupancy: On means occupied, Off means not occupied
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opening: On means open, Off means closed
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power: Power, over-current, etc.
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safety: On means unsafe, Off means safe
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smoke: On means smoke detected
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sound: On means sound detected, Off means no sound
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vibration: On means vibration detected, Off means no vibration