N900 light meter
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cat /sys/class/i2c-adapter/i2c-2/2-0029/lux | cat /sys/class/i2c-adapter/i2c-2/2-0029/lux | ||
21 | 21 | ||
| + | |||
| + | Under MeeGo it's available as | ||
| + | <pre> | ||
| + | cat /sys/class/i2c-adapter/i2c-2/2-0029/device0/illuminance0_input | ||
| + | </pre> | ||
Third party applications that use this sensor include [http://www.tuug.fi/~toni/serendipity/index.php?/archives/14-Luxus-Light-Meter-v0.2-for-N900,-as-a-real-homescreen-widget.html Luxus Light Meter] and [http://norayr.arnet.am/weblog/?p=1710 photographic light meter]. | Third party applications that use this sensor include [http://www.tuug.fi/~toni/serendipity/index.php?/archives/14-Luxus-Light-Meter-v0.2-for-N900,-as-a-real-homescreen-widget.html Luxus Light Meter] and [http://norayr.arnet.am/weblog/?p=1710 photographic light meter]. | ||
Revision as of 13:58, 18 February 2011
The light meter lets the software on the N900 sense ambient light levels.
Hardware
The device is a TAOS TSL2563.
Software
It is handled by the kernel module tsl2563.
The kernel driver exposes the lux value in the sysfs file
cat /sys/class/i2c-adapter/i2c-2/2-0029/lux 21
Under MeeGo it's available as
cat /sys/class/i2c-adapter/i2c-2/2-0029/device0/illuminance0_input
Third party applications that use this sensor include Luxus Light Meter and photographic light meter.
The sensor is also used to modulate the backlight in response to ambient light.