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url: /sensors/controls.md
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# Controls & states

Once a camera has [sensors set up](/sensors/setup), you can see their state and operate the ones that support it.

## Where sensors appear

* **The camera's Overview** (in the [settings](/cameras/settings) drawer) lists every sensor assigned to the camera with its live state and, for controllable ones, the controls.
* **[Shortcuts](/cameras/shortcuts)** let you place a sensor on the video to read its state on hover and operate it on click.
* **The [Sensors page](/sensors/setup#the-sensors-page)** lists every sensor in the system. Its edit dialog shows the same controls, including for sensors assigned to no camera.

## Read-only sensors

These show their current state but aren't operated:

* **Contact.** Open or closed, for a door or window.
* **Temperature** and **humidity.** The current reading.
* **Occupancy.** Occupied or empty.
* **Smoke** and **leak.** Clear or triggered.
* **Gas, carbon monoxide, heat, cold, vibration, tamper, problem,** and **power.** Clear or triggered.
* **Illuminance** and **CO₂.** The current reading.
* **Battery.** Level and charging.

## Controllable accessories

These you can operate (admin only):

* **Light.** On or off, and brightness where supported.
* **Switch.** On or off.
* **Lock.** Lock or unlock.
* **Siren.** On or off, and volume where supported.
* **Garage.** Open or close.
* **Doorbell.** Trigger a ring.
* **Security system.** Choose a mode: Off, Home, Away or Night. If the alarm goes off, the control shows an alarm banner and the modes stay locked while it's active.

PTZ cameras have their own [controls and autotrack](/sensors/ptz).