[Tutorial][SP] How-to for controlling the LED Illumination bar! - Xperia SP Android Development

[ intro ]
so as you all are aware the Xperia SP has a nice LED Illumination bar... Sony was kind enough to provide APIs to control this illumination bar but that is only good if you use it in apps...
many devs here were trying to figure out how to control this LED bar by the traditional ways of using sysfs interface...
I was able to figure out how to get this work! following is a short how-to for controlling the LED Illumination bar!
hope this helps!
[ proof ]
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[ NOTE ]
all this requires ROOT! to change the values!
[ interface ]
the stock kernel provides a SYSFS interface at:
Code:
/sys/devices/i2c-10/10-0047/leds
there are 3 LED locations mapped as:
LED3 - LED1 - LED2
(check the image above for mapping)
each LED control has 3 colors:
RED
Code:
[B][COLOR="Red"]
/sys/devices/i2c-10/10-0047/leds/LED1_R/
/sys/devices/i2c-10/10-0047/leds/LED2_R/
/sys/devices/i2c-10/10-0047/leds/LED3_R/
[/COLOR][/B]
BLUE
Code:
[B][COLOR="blue"]
/sys/devices/i2c-10/10-0047/leds/LED1_B/
/sys/devices/i2c-10/10-0047/leds/LED2_B/
/sys/devices/i2c-10/10-0047/leds/LED3_B/
[/COLOR][/B]
GREEN
Code:
[B][COLOR="green"]
/sys/devices/i2c-10/10-0047/leds/LED1_G/
/sys/devices/i2c-10/10-0047/leds/LED2_G/
/sys/devices/i2c-10/10-0047/leds/LED3_G/
[/COLOR][/B]
each LED control interface has two parameters which are of interest to control LED
led_current
brightness
traditionally LEDs could be controlled using only the brightness interface BUT on the Xperia SP we first need to control the led_current
each one has limits 0 (minimum) to 255 (maximum)
[ example ]
to make left LED GREEN give the command:
Code:
[b]
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED3_G/led_current;
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED3_G/brightness;
[/b]
to make center LED BLUE give the command:
Code:
[b]
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_B/led_current;
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_B/brightness;
[/b]
to make right LED RED give the command:
Code:
[b]
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED2_R/led_current;
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED2_R/brightness;
[/b]
to power off all the LEDs use:
Code:
[B]
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED1_B/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED2_B/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED3_B/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED1_G/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED2_G/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED3_G/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED1_R/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED2_R/led_current;
echo 0 > /sys/devices/i2c-10/10-0047/leds/LED3_R/led_current;
[/B]
for disco lights:
Code:
[B]echo 255 > /sys/devices/i2c-10/10-0047/leds/LED3_G/led_current; echo 255 > /sys/devices/i2c-10/10-0047/leds/LED3_G/brightness; sleep 1; echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_B/led_current; echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_B/brightness; sleep 1; echo 255 > /sys/devices/i2c-10/10-0047/leds/LED2_R/led_current; echo 255 > /sys/devices/i2c-10/10-0047/leds/LED2_R/brightness; sleep 1;[/b]
cheers!
regards,
DooMLoRD

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Reserved.
Sent from my C5302 using XDA Premium 4 mobile app

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definitely you are the man .. thanks for your hard work

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Yes!,thanks man!, I'm Kenny on the facebook page =D, well done man, once again, you are a beast =P

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Oh man, i have no idea how to edit this thing
Sent from my C5303 using XDA Premium 4 mobile app

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Sunghabib said:
Oh man, i have no idea how to edit this thing
Sent from my C5303 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
You can use a terminal emulator to run these scripts.
Sent from my C5303 using xda app-developers app

---

Detailed Tutioral
For inserting this commands you will need rooted device and android terminal emulator which can be downloaded from Play store.
Then you will have to get root access in Terminal and for that command is " /system/xbin/su " (w/o quotes).
Now SuperSu will prompt for Root access and then you need to grant access.
Now type the command from the OP and see the magic!
:victory:

---

ashis.kyal said:
For inserting this commands you will need rooted device and android terminal emulator which can be downloaded from Play store.
Then you will have to get root access in Terminal and for that command is " /system/xbin/su " (w/o quotes).
Now SuperSu will prompt for Root access and then you need to grant access.
Now type the command from the OP and see the magic!
:victory:
Click to expand...
Click to collapse
if u want to make any changes to sysfs those are pre-requisites...
if u want simpler version wait for a simple LED control app

---

DooMLoRD said:
if u want to make any changes to sysfs those are pre-requisites...
if u want simpler version wait for a simple LED control app
Click to expand...
Click to collapse
Yes I know that these are the prerequisite but many Of the members didnt know the process.
Btw an app will be a a great

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Any way to change colours then those three?
Sent from my C5303 using xda app-developers app

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Li-polymers said:
Any way to change colours then those three?
Sent from my C5303 using xda app-developers app
Click to expand...
Click to collapse
its standard RGB...
u can mix them to get desired color
following a list of colors u can get using RGB combination:
http://kb.iu.edu/data/aetf.html

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Li-polymers said:
Any way to change colours then those three?
Sent from my C5303 using xda app-developers app
Click to expand...
Click to collapse
mix those colors to get different colors
like to get purple
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_B/led_current;
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_B/brightness;
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_R/led_current;
echo 255 > /sys/devices/i2c-10/10-0047/leds/LED1_R/brightness;

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Is there any command to let the led light keep on changing colour???:laugh:

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http://forum.xda-developers.com/showthread.php?t=1929895
DaPau's script could be used to get a bit more control over the led colors.
just replace the class directories with both new SP paths

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hey @DooMLoRD i've uploaded video for testing works LED Rainbow.
check this out hope u like it :good:
-->> LED Rainbow

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Sunghabib said:
hey @DooMLoRD i've uploaded video for testing works LED Rainbow.
check this out hope u like it :good:
-->> LED Rainbow
Click to expand...
Click to collapse
how u did tat!!!!XDits awesome!!!!teach me
:good:

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Sunghabib said:
hey @DooMLoRD i've uploaded video for testing works LED Rainbow.
check this out hope u like it :good:
-->> LED Rainbow
Click to expand...
Click to collapse
Care to give the attached rainbow script a shot?
haven't rooted my SP yet, but if i'm right this should be good

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this, mr Doomlord, is da ****

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nixx-X1 said:
Care to give the attached rainbow script a shot?
haven't rooted my SP yet, but if i'm right this should be good
Click to expand...
Click to collapse
I use doomlord.disco script
Sent from my C5303

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Sunghabib said:
I use doomlord.disco script
Sent from my C5303
Click to expand...
Click to collapse
I know
just wanted someone to test that rainbow script to see if it works.
no wish to defy dooms script or anything, i was just curious ..