What is this:

An android app that uses the charging LED to show the current CPU load.

Market Link: https://market.android.com/details?id=com.britoso.cpustatusled

Credits: Props to Bernhard.R.Suter creator of NetMeter, on which this was built upon.

Screenshot:

Video: http://www.youtube.com/watch?v=5ZnMGEX0vOY



Forum: http://forum.xda-developers.com/showthread.php?t=705645



Works On:

Nexus One: Needs Root

HTC Desire: Root not needed

HTC G1: Needs Root

HTC Magic: Needs Root

Motorola Droid: Needs Root



Here are the colors, and the order in which they are used: (colors may vary depending on the device)

CPU%  -  COLOR
<3     -  Off
3-15   -  blue
16-40  -  green
41-75  -  amber
>=76   -  red

Instructions:

Download the apk and install it.

adb install -r NetMeterLED.apk



To Add your Device

In order for me to add support your device I will need the following information. Make a post using the forum link above.

1) Phone Model. settings->about phone -> model number

2) Path to the LED device control files on your filesystem

Ex: /sys/devices/i2c-0/0-0066/leds/red/brightness

3) Specify which LEDs are present, and work.

Ex: blue,green,amber,red

To test if a LED works:

echo 1 > /sys/devices/i2c-0/0-0066/leds/red/brightness

note: read step 3 and if root is needed run 'su' first.

4) Are the device files world writeable?

Find out by running: ls -l /sys/devices/i2c-0/0-0066/leds/red/brightness (just an example)

-rwxr--r-- <- if the last 3 letters are r-- then you need root to write to it.

-rwxr--rw- <- if the last 3 letters start with rw then any user can write to it. (root not needed)



Updates upto 0.94

07/16/2010 
-v0.94
- added hard coded htc derire LED paths
07/16/2010
-v0.93
- fixed start-at-boot
07/16/2010
-v0.92
- misc bugfixes
- prompts you if it needs 'su' and cant find it
07/11/2010
-v0.90
- Added the ability to change thresholds and colors.
- prefs are saved and reloaded on startup
- Added LED autodetection code. If root is needed you will need to have the 'su' executable present.
07/08/2010
-v0.81
-Fixed a bug causing the signal graph to stop drawing after switching to another app and back
-Added Hero/Eris/G2 and Droid Incredible support. Both have only Green and Amber LEDs and need root.
07/07/2010
-v0.80b
- Redid the UI. Changed app name to CPUStatusLED, changed icon
- Top 3 process are displayed if the CPU usage is above 75%
- added GSM signal graph.
07/01/2010
-v0.76
- removed Cell and Wifi graphs, CPU only now.
- option to toggle enable/disable LED setting.
v0.74
- added g1, magic support
- optimized a few areas, easy addition of additional phone models.
v0.71
- Sneaky red LED bug, wasn't turning off correctly sometimes
- HTC desire uses sh and not su
6/22/10
-v0.6
- HTC desire support added
- commented out service.setForeground() as it was deprecated 
- minor code fixes
6/20/10 
-v0.5 
-Turn off LEDs on Exit, 
-Start app on boot(background).
-Changed Application package name to distinuish it from the original Netmeter. Please uninstall the old version before upgrading.
6/19/10 - bugfixes - Fixed a bug where a LED would stay on
Code change to keep the SU console open and keep reusing it.
Changed the project name from NetMeterPlus to NetMeterLED