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

DooMLoRD · Sep 10, 2013

[ 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 ]

[ 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

Divaksh · Sep 10, 2013

Reserved.

Sent from my C5302 using XDA Premium 4 mobile app

karma123 · Sep 10, 2013

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

moomoopobo · Sep 11, 2013

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

Sunghabib · Sep 11, 2013

Oh man, i have no idea how to edit this thing

Sent from my C5303 using XDA Premium 4 mobile app

Li-polymers · Sep 11, 2013

Sunghabib said:
Oh man, i have no idea how to edit this thing

Sent from my C5303 using XDA Premium 4 mobile app

You can use a terminal emulator to run these scripts.

Sent from my C5303 using xda app-developers app

ashis.kyal · Sep 11, 2013

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:

DooMLoRD · Sep 11, 2013

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:

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

ashis.kyal · Sep 11, 2013

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

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

Li-polymers · Sep 11, 2013

Any way to change colours then those three?

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DooMLoRD · Sep 11, 2013

Li-polymers said:
Any way to change colours then those three?

Sent from my C5303 using xda app-developers app

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

sagar29 · Sep 11, 2013

Li-polymers said:
Any way to change colours then those three?

Sent from my C5303 using xda app-developers app

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;

ong ong · Sep 11, 2013

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

nixx-X1 · Sep 12, 2013

http://xdaforums.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

Sunghabib · Sep 12, 2013

hey @DooMLoRD i've uploaded video for testing works LED Rainbow.
check this out

hope u like it :good:

-->> LED Rainbow

ong ong · Sep 12, 2013

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

-->> LED Rainbow

how u did tat!!!!XDits awesome!!!!teach me
:good:

nixx-X1 · Sep 12, 2013

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

-->> LED Rainbow

Care to give the attached rainbow script a shot?

haven't rooted my SP yet, but if i'm right this should be good

weedpuff · Sep 12, 2013

this, mr Doomlord, is da ****

Sunghabib · Sep 13, 2013

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

I use doomlord.disco script

Sent from my C5303

nixx-X1 · Sep 13, 2013

Sunghabib said:
I use doomlord.disco script

Sent from my C5303

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 ..

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

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