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<concept id="GUID-7BFEEDF7-3DB8-42FF-9D7A-F98E536F7686" xml:lang="en"><title>Sensor

interaction</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<section id="GUID-27524BA1-FE0E-4906-8A73-C2F8B4B5BC6C"> <p>Devices based

on the Symbian platform are supporting extendable Sensor framework.

The supported sensors include accelerometer sensor, which is used for example

for sensing device orientation (landscape/portrait and screen down/screen

up) and tapping (giving the device light taps with your hand).  </p> <p>With

the accelerometer sensor, there are three types of interaction that can be

achieved:</p><ol>

<li id="GUID-E30828C6-4EA8-49B7-BF00-ADC1D132BBFB"><p>Tapping the device by

hand (double tap) to perform a given function in set events. Tapping the device

interaction is not recommended for touch devices: the user may unintentionally

tap the device on the touch area, and trigger controls by mistake.</p></li>

<li id="GUID-5700ECF7-40ED-4ECE-ABB5-3C2E93173871"><p>Changing the device's

orientation from portrait to landscape and back.</p></li>

<li id="GUID-7233626B-2234-44EB-9E64-CB2D787C6CC2"><p>Changing the device

orientation from screen down (for example, on a table) to screen up and back

to perform a given function in set events (for example, silencing an incoming

call).</p></li>

</ol><p>In effect, the system is capable of sensing any of these interaction

methods in the events where sensors can be used. </p><p>The supported sensor

interactions are configurable per device. Also, the user can be given the

option to set which one the user would like to use. For example, it is possible

to set methods 1 and 3 (double tap by hand and turning the screen downwards)

for the Silence incoming call event. The settings are available in Control

Panel.</p><note>When designing an application which uses the sensors, take

into account that the users may switch the use of sensors and display orientation

control off in the Control Panel. </note><p>A double tap on the device produces

tactile (vibrating) feedback to reinforce and acknowledge that the interaction

has been successful.</p><p>As the Sensor framework is extendable, devices

can have different configurations for sensors.  For instance, some devices

may have a magnetometer sensors included, which could be then used, for example,

as a compass on location-based services.</p><p>For more information, see <xref href="GUID-AE979B97-5610-42F3-99A7-5A3D66D3C2E6.dita">Sensor interaction</xref>.</p> 

   </section>