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Updated sensor documentation to be more approachable to new users. (#17041)

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Co-authored-by: Franck Nijhof <frenck@frenck.nl>
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Mark 2021-03-22 06:04:36 -07:00 committed by GitHub
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@ -9,13 +9,13 @@ ha_domain: sensor
ha_iot_class: ha_iot_class:
--- ---
Sensors are gathering information about states and conditions. Sensors are a basic platform component in Home Assistant. They monitor the states and conditions of a variety of entities. An entity can be many things. This can include a physical device like a motion sensor that reports the battery level, a web service that retrieves the weather temperature, a built-in function that calculates the sun's elevation relative to your GPS position, or even a custom sensor you may have created to report the free space on your laptop. These are all *things* reporting different types of information.
Home Assistant currently supports a wide range of sensors. They are able to display information which are provides by Home Assistant directly, are gathered from web services, and, of course, physical devices. Some of these sensors are built-in to Home Assistant, some are created automatically when you add an integration (see this [list](/integrations/#sensor)), and some can be created manually. The [Statistics](/integrations/statistics) and [Template](/integrations/template) sensors are two examples of the last case.
## Device Class ## Device Class
The way these sensors are displayed in the frontend can be modified in the [customize section](/docs/configuration/customizing-devices/). The following device classes are supported for sensors: The type of data a sensor returns impacts how it is displayed in the frontend. This is controlled by the sensor's device class designation. Built-in sensors and many created from an integration will have this designation predefined. Those can be modified in the [customize section](/docs/configuration/customizing-devices/). When manually creating a new sensor the device class may be optionally assigned. A full list of available sensor device classes is below:
- **None**: Generic sensor. This is the default and doesn't need to be set. - **None**: Generic sensor. This is the default and doesn't need to be set.
- **battery**: Percentage of battery that is left. - **battery**: Percentage of battery that is left.