Has anyone seen the 2nd LED on the EVO 3D? It's on the upper left, and I know it can at least light up red.
What the hell is it for?
An app like wimax notifier would be nice for it....
SteelH said:
Has anyone seen the 2nd LED on the EVO 3D? It's on the upper left, and I know it can at least light up red.
What the hell is it for?
An app like wimax notifier would be nice for it....
Click to expand...
Click to collapse
I was wondering the same thing. I had though it was a proximity sensor or a light sensor but I dont think it is. Proximity sensor is on the far left I think. How did you get it to turn red?
Sent from my rockin 3D
SteelH said:
Has anyone seen the 2nd LED on the EVO 3D? It's on the upper left, and I know it can at least light up red.
What the hell is it for?
An app like wimax notifier would be nice for it....
Click to expand...
Click to collapse
i wish it was another LED .. i have a feeling its the proximity sensor which i think uses infra-red and will be turned on when you're in a phone call. when in a dark room, you should be able to see it emit a deep red?
the other sensor next to the proximity sensor on the upper left is the light sensor.
edit: these are LED locations I've found in the the stock kernel sysfs
# busybox find . -name brightness
./flashlight.0/leds/flashlight/brightness
./leds-pm8058/leds/button-backlight/brightness
./leds-pm8058/leds/green/brightness
./leds-pm8058/leds/amber/brightness
./msm_fb.590337/leds/lcd-backlight/brightness
This thing CLEARLY lit up bright red, no need for a dark room. You could see it outside in the sun like the charging/low battery LED on the right.
SteelH said:
This thing CLEARLY lit up bright red, no need for a dark room. You could see it outside in the sun like the charging/low battery LED on the right.
Click to expand...
Click to collapse
so now i'm experimenting ...
over adb shell .. these are the leds we have access to control via stock kernel sysfs area using netarchy's silverneedle 3 kernel and stock kernel.
turn on amber led
echo 100 > /sys/devices/platform/leds-pm8058/leds/amber/brightness
turn off amber led
echo 0 > /sys/devices/platform/leds-pm8058/leds/amber/brightness
turn on green led
echo 100 > /sys/devices/platform/leds-pm8058/leds/green/brightness
turn off green led
echo 0 > /sys/devices/platform/leds-pm8058/leds/green/brightness
turn on button-backlight led
echo 100 > /sys/devices/platform/leds-pm8058/leds/button-backlight/brightness
turn off button-backlight led
echo 0 > /sys/devices/platform/leds-pm8058/leds/button-backlight/brightness
turn on flashlight led (camera flash on the back)
echo 100 > /sys/devices/platform/flashlight.0/leds/flashlight/brightness
turn off flashlight led (camera flash on the back)
echo 0 > /sys/devices/platform/flashlight.0/leds/flashlight/brightness
with the screen on:
turn on button-backlight led
echo 100 > /sys/devices/platform/msm_fb.590337/leds/lcd-backlight/brightness
turn off button-backlight led
echo 0 > /sys/devices/platform/msm_fb.590337/leds/lcd-backlight/brightness
SteelH said:
This thing CLEARLY lit up bright red, no need for a dark room. You could see it outside in the sun like the charging/low battery LED on the right.
Click to expand...
Click to collapse
How were you able to turn it on?
Sent from my PG86100 using Tapatalk
EricSS619 said:
How were you able to turn it on?
Sent from my PG86100 using Tapatalk
Click to expand...
Click to collapse
+ 1 ..........
Sent from my PG86100 using XDA Premium App
EricSS619 said:
How were you able to turn it on?
Sent from my PG86100 using Tapatalk
Click to expand...
Click to collapse
It turned on during a borked run on my windows7 machine of revolutionary. Revolutionary wouldn't root my phone via windows for some reason, it hung the phone and a red (not infrared, i know the difference) led lit up on the upper left. Had to do a battery pull and run ubuntu to revolutionary my phone. And of course with the battery pull it turned off.
Cool. Now if someone could get one of them to stay on longer than 10 minutes I'd be a happy camper.
I knew I wasn't crazy, here are pics to show what I was talking about!!!
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"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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SteelH said:
I knew I wasn't crazy, here are pics to show what I was talking about!!!
Click to expand...
Click to collapse
lol .. wow. i remember talking to you about this months ago. you were very adiment you saw the LED, but we haven't heard about it from anybody else.
are those pics of your device?
do you only see that LED in bootloader mode? device doesnt appear to be plugged in. did you do anything different before loading the bootloader?
curious how we can replicate.
don't think that led is configured in the normal boot kernel sysfs setup .. might have to add in code to gain access to it
It almost looks like the glow you get from an infrared light in a camera. I just took a pic from my blackberry and get a faint glow. Now if I could get my work BB to connect to my computer.... damn POS.
Do you see that light, physically?
Maybe its an out-of-wack infrared sensor of some sort? I've seen cheap IR leds give a purplish glow.
Cabe24i said:
It almost looks like the glow you get from an infrared light in a camera. I just took a pic from my blackberry and get a faint glow. Now if I could get my work BB to connect to my computer.... damn POS.
Do you see that light, physically?
Maybe its an out-of-wack infrared sensor of some sort? I've seen cheap IR leds give a purplish glow.
Click to expand...
Click to collapse
Exactly what I originally thought!
The proximity sensor is located right there and I'm pretty sure it uses and infra red light to measure the short distance reflection ... but I'm far from an expert on these different sensors.
The light sensor is also located in the exact same area.
joeykrim said:
lol .. wow. i remember talking to you about this months ago. you were very adiment you saw the LED, but we haven't heard about it from anybody else.
are those pics of your device?
do you only see that LED in bootloader mode? device doesnt appear to be plugged in. did you do anything different before loading the bootloader?
curious how we can replicate.
don't think that led is configured in the normal boot kernel sysfs setup .. might have to add in code to gain access to it
Click to expand...
Click to collapse
Yes, that is my device. I took several pictures in a mad frenzy this morning.
I was flashing TWRP v2.0 and it killed my phone, would not boot until I did a battery pull flashed an older version of TWRP. I have been trying to replicate it for a long time, and it just happened this morning.
Cabe24i said:
It almost looks like the glow you get from an infrared light in a camera. I just took a pic from my blackberry and get a faint glow. Now if I could get my work BB to connect to my computer.... damn POS.
Do you see that light, physically?
Maybe its an out-of-wack infrared sensor of some sort? I've seen cheap IR leds give a purplish glow.
Click to expand...
Click to collapse
AFAIK there is no IR sensor on the EVO 3D, but I could be wrong. I have looked over electrical schematics for the EVO 3D, but never could find any mention of WTF this light may be on the upper left side... Let alone how to make it light up. Yes, I could see it with my own eyes.
SteelH said:
Yes, that is my device. I took several pictures in a mad frenzy this morning.
I was flashing TWRP v2.0 and it killed my phone, would not boot until I did a battery pull flashed an older version of TWRP. I have been trying to replicate it for a long time, and it just happened this morning.
AFAIK there is no IR sensor on the EVO 3D, but I could be wrong. I have looked over electrical schematics for the EVO 3D, but never could find any mention of WTF this light may be on the upper left side... Let alone how to make it light up. Yes, I could see it with my own eyes.
Click to expand...
Click to collapse
Looks like there is an IR led as it has a proximity sensor. Most use infrared (http://en.wikipedia.org/wiki/Proximity_sensor) however, some are electromatic. Given that most smartphones that have prox sensors using IR, I'd bet this one does as well.
Couple of ways to test this - if anyone has a cam with a crappy IR filter you can take a picture of the phone when something is close, you should be able to see the IR led light up - an old camcorder works too. Most newer cameras have an IR filter to prevent IR light from reaching the CCD.
You can see if you can disable the prox sensor via android and see if the light turns on and off - even if you can see the light visibly, see if your camera can. Obviously it saw something to be able to take that picture - after years of video production back in the 90s though, I have to say that looks almost exactly like IR light.
I'm wiling to bet its the IR sensor and the led is somehow failing or producing visible light. You can see a similar issue with cheap night vision cameras, you can usually see a purple light right around the clear LEDs. I'm not sure if its because they overvolt the IR leds (you aren't supposed to see it) or if its something with the led itself.
Take a look at the pictures near the top of this page: http://sci-toys.com/scitoys/scitoys/light/invisible/invisible.html
Some more good info on ir light here: http://en.wikipedia.org/wiki/Infrared
If there is way to access the prox sensor you might be able to do some tests to rule it out.
I tested with an older Sony digital 8 camcorder I got in 2000, saw nothing.
Sent from my PG86100 using Tapatalk
Sent from my PG86100 using Tapatalk
Cell phone cameras will be more likely to catch it if it is near-IR since they aren't filtered as well as a regular camera. If you have anything with a "night" mode it may remove the IR filter and let you see it easier too though.
I tried it with Sony night shot...still saw nothing
Sent from my PG86100 using Tapatalk
The Evo 4G also has a hidden second notification light. I saw the light on my Evo 4G when it stopped turning on. Sprint gave me a replacement one. But it's probably not a coincidence that your 3D's light came on when you were messing with Recovery. Probably has to do with Hardware failure.
Another interesting theory... It could be some sort of failure notification light. Motherboards on PCs have had them for some time now.
Sent from my PG86100 using XDA App
Related
I'm unsure if anyone tackled or even noticed this one yet, but I noticed that after I unlocked the bootloader via htcdev.com, whenever I make a call, there's a little red light that sits above the HTC branding (left of the notification LED) that flickers repeatedly whenever I make any phone calls. Is this a unlocked bootloader indicator, malfunction, or normal function of the phone? Also, can someone tell me what that light is for if it's not an indicator of a call?
daeboe said:
I'm unsure if anyone tackled or even noticed this one yet, but I noticed that after I unlocked the bootloader via htcdev.com, whenever I make a call, there's a little red light that sits above the HTC branding (left of the notification LED) that flickers repeatedly whenever I make any phone calls. Is this a unlocked bootloader indicator, malfunction, or normal function of the phone? Also, can someone tell me what that light is for if it's not an indicator of a call?
Click to expand...
Click to collapse
I don't ever get the red indicator light unless my battery level is low.
In fact I don't have any LED light while I'm on a call at all.
Binary100100 said:
I don't ever get the red indicator light unless my battery level is low.
In fact I don't have any LED light while I'm on a call at all.
Click to expand...
Click to collapse
I'm not saying the notification LED. It's a separate light to the left of it. It's located conveniently right above the right side of the T in the HTC branding. It's very very faint. The only reason I noticed it was because I was in the dark and I pulled the phone away from my face to look at it.
daeboe said:
I'm not saying the notification LED. It's a separate light to the left of it. It's located conveniently right above the right side of the T in the HTC branding. It's very very faint. The only reason I noticed it was because I was in the dark and I pulled the phone away from my face to look at it.
Click to expand...
Click to collapse
I'm in the dark right now. I just made a call to my work phone. There is no light.
That's a sensor. It turns the screen off when the phone is by your face..(having a brain fart of what that sensor is called) lol
Edit: proximity sensor
Sent by accident from my Amaze using Tapatalk
Double0EK said:
That's a sensor. It turns the screen off when the phone is by your face..(having a brain fart of what that sensor is called) lol
Edit: proximity sensor
Sent by accident from my Amaze using Tapatalk
Click to expand...
Click to collapse
So when that sensor is active, you can see the red flashing it does?
Edit: Well, you seem to have won the cookie. I don't know why my proximity sensor is actually visible. I just tested it with my thumb. Turns out that that is indeed the proximity sensor.
Mine does the same thing only its completly random. I'll look over and it'll be flashing. I decided to just ignore it a few weeks ago.
Sent from my HTC Amaze 4G
Mines doing it to, its really very faint and wouldn't have noticed it had I not read this.
Sent from my HTC Amaze 4G using xda premium
I noticed this a while a ago it is the proximity sensor, its not next to the left of the ambient light sensor and it is NOT the led!!, go into a dark room and make a call it'll start blinking...or any app that uses proximity sensor...Also if you have the option of pocket mode it'll probably be running all the time but i'm not sure, it should technically run when you receive a call, but you will definitely notice that it'll blink very very rapidly while you're in a call...proximity sensor!!
Whats weird that I noticed also is that when my HTC amaze fell on the floor board of my truck I reached down to pick it up and passed it in front of my Radar detector the L band went off on the radar detector I though maybe a cop out but nope every time i put the phone in the radar detectors view it started going off, pretty weird just wondering if anyone can explain that, it might be the reason its giving off that red glow
It emits infrared light. Some peoples' eyes are better attuned to see it than others. In other words, some people cannot see the light at all, and other people can see it just find - it all depends on how sensitive your eyes are to the infrared spectrum.
yeah i thought i was the only one with this problem. whenever i make calls the light goes crazy even after the call!
hey so after reading this, because i was also trying to find out what it is myself.. i now know what it is..
but recently i noticed that my phone freaked out, and shut itself off, and that red light stayed on.. my phone wouldnt charge nor turn on until
i took the battery out and out it back in.. has that happened to anyone??
Yea I've seen it to
Sent from my HTC Ruby using xda premium
Please keep all question related threads in the Q&A section. Thank you.
Thread Moved.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"If you choose not to decide, you still have made a choice"
Sent from my HTC One X, using XDA Premium
http://forum.xda-developers.com/announcement.php?a=81
So maybe somebody can help me out. I know the top two sensors on top left of the amaze are proximity and light sensor. Which one is the one on the left of those two?
Last question, the top left sensor is flickering a dim red color. Is this normal? It even stays on when I turn off the screen. It's noticeable in the dark. It goes away if I restart the phone. Anyone also have this problem?
Sent from my HTC_Amaze_4G using XDA App
It's the light that emmits if the phone is near your face or far to turn off or on the screen.. you supposed to get that effect when your on call mode and when your not it should turn off automatically..
I think why it kepps blinking because the red light if it is near on your face the red light bounce back to the sensor telling that the phone is on your face thus why the screen turn off..
Well It's blinking when I'm not on a call. It's staying on till I notice it and trun off my phone or restart it.
I do notice if I'm on a call for more than 5 mins I have to hit my power button to get the screen to show up to end a call. Shouldn't the screen com back on once its away from my face? Maybe I have a bad sensor.....
Sent from my HTC_Amaze_4G using XDA App
bmbrad said:
So maybe somebody can help me out. I know the top two sensors on top left of the amaze are proximity and light sensor. Which one is the one on the left of those two?
Last question, the top left sensor is flickering a dim red color. Is this normal? It even stays on when I turn off the screen. It's noticeable in the dark. It goes away if I restart the phone. Anyone also have this problem?
Sent from my HTC_Amaze_4G using XDA App
Click to expand...
Click to collapse
its normal all the phones do that, its the proximity sensor, tells your phone when your face is near the phone so the screen goes off to save battery and also prevent accidental pushing of buttons. If you have in pocket mode checked (always checking to see if its in your pocket to increase the ringtone) in the settings it's probably always on which wastes battery, you could turn in off under settings--> sound.
I swear I saw a post just like this like a month ago.
http://forum.xda-developers.com/showthread.php?t=1473426
If you're wondering what it is I'll save you the trouble.
Proximity sensor.
I just noticed the past couple weeks that my light sensor does not read out less than 90 lux, even in total darkness. For reference, a totally dark room should read out at 0 lux. This affects any auto-brightness settings and apps.
I could almost swear that I tested this when I first got the phone, it did work correctly. So I was wondering first if anyone else has seen it happening to them, or if you could please test it.
The best way I've found to test is to use AndroSensor from the market. Also, just as additional info, I've tried this with an Otterbox Defender and with a naked phone, with the same results. Phone has never been dropped or wet and the proximity sensor works fine. I'm running stock ROM rooted.
Many thanks...
I can't help but I can say a few people have been having problems with there sensor... I had to replace my phone today because of it not working...
Sent from my EVO using xda premium
Slappy_G said:
I just noticed the past couple weeks that my light sensor does not read out less than 90 lux, even in total darkness. For reference, a totally dark room should read out at 0 lux. This affects any auto-brightness settings and apps.
I could almost swear that I tested this when I first got the phone, it did work correctly. So I was wondering first if anyone else has seen it happening to them, or if you could please test it.
The best way I've found to test is to use AndroSensor from the market. Also, just as additional info, I've tried this with an Otterbox Defender and with a naked phone, with the same results. Phone has never been dropped or wet and the proximity sensor works fine. I'm running stock ROM rooted.
Many thanks...
Click to expand...
Click to collapse
mine dont go less than 90 either???
Getting the same thing..
I'm curious, does anyone else that's getting the 90 lux reading also have light bleed from the home button? If you're getting a 0, do you have light bleed? Maybe something with how the glass is glue on?
I think we all are? Maybe the reason why the auto-brightness is so sensitive.
Just tested it... Mine stays at 90 to no matter what... Does not move in light or dark... I don't think the program is utilizing out sensor right??? Also my proximity sensor goes from 3.5in to 0 no matter how far or close I am... There is no in between???
Sent from my EVO using xda premium
Same here. No light bleed...
Check Me Out On The Google Play Store!!!
Sent From My HTC Evo 4G LTE, On The Now Network From Sprint!
I'm getting the same reading of 90 lux and if I put it up to light it moves higher ... You think this can be fixed when we get kernel source?
Sent from my LTEeeeeevoo using xda premium
NissanNick said:
Just tested it... Mine stays at 90 to no matter what... Does not move in light or dark... I don't think the program is utilizing out sensor right??? Also my proximity sensor goes from 3.5in to 0 no matter how far or close I am... There is no in between???
Sent from my EVO using xda premium
Click to expand...
Click to collapse
This is as designed - the proximity sensors either read out "something is up against the phone" or not. So they all have only 2 values, zero and something else.
goffmj said:
Getting the same thing..
I'm curious, does anyone else that's getting the 90 lux reading also have light bleed from the home button? If you're getting a 0, do you have light bleed? Maybe something with how the glass is glue on?
Click to expand...
Click to collapse
No light bleed that I can see, and I used to have an Evo 4G, so I know what it used to look like on that device. I'm tempted to try a factory reset, but have not unlocked the bootloader yet, so no way to make a nandroid. Ugh.
Bump-bump-bumpity-doo...
Anyone else seeing their light sensor truly zeroing out? For now, I've reinstalled my purchased copy of Lux Auto Brightness and set it to use the camera as the light sensor, which does the trick, but only checks when the screen is first turned on.
Sent from my HTC6435LVW using Tapatalk 2
Mine do, so yes.
Yes, they absolutely should light up.
Sent from my HTC6435LVW
They only light up if its dark or you cover the Light Sensor.
Oh...so its light out they'll be off? Ok. That explains it. Thanks!!
Sent from my HTC6435LVW using Tapatalk 2
Sembe80x said:
Oh...so its light out they'll be off? Ok. That explains it. Thanks!!
Sent from my HTC6435LVW using Tapatalk 2
Click to expand...
Click to collapse
Ehh, not sure what you mean. They light up whenever the phone thinks they should light up, such as at night, in a dark room, etc. Heck they light up quite often even under normal house lighting. Now if you are outdoors in broad daylight, they will not turn on.
RunNgun42 said:
Ehh, not sure what you mean. They light up whenever the phone thinks they should light up, such as at night, in a dark room, etc. Heck they light up quite often even under normal house lighting. Now if you are outdoors in broad daylight, they will not turn on.
Click to expand...
Click to collapse
About 75% of the time under dark conditions, mine aren't lighting up either. I already swapped the phone out at my local store and it's still happening.
majorminus said:
About 75% of the time under dark conditions, mine aren't lighting up either. I already swapped the phone out at my local store and it's still happening.
Click to expand...
Click to collapse
Same here. Coming from One X where they would light up all the time I noticed it straight away. DNA's buttons are much more dim and require really dark conditions to light up. Unfortunately there's no setting to change that..
Button lights don't consistently turn on
latebeat said:
Same here. Coming from One X where they would light up all the time I noticed it straight away. DNA's buttons are much more dim and require really dark conditions to light up. Unfortunately there's no setting to change that..
Click to expand...
Click to collapse
Me too. Keep having to cover the light sensor to turn them on. Probably a software glitch. Come on HTC, fix it, and release a patch to let us reprogram the button functions while you're at it.
It's probably already known by everyone that this phone packs an RG notification light (damn you, ZTE!) What's more, blinking seems to be fixed to solid and slow blinking, and it can only display RED , ORANGE and GREEN.
But, at least on ResurrectionRemix, there seems to be a way to turn on the two LEDs that we actually have with the console, and with a desired brightness:
su
echo 255 >/sys/class/leds/red/brightness
255 is the maximum brightness, but it ranges from 0 to 255.
Also, we can do a very nice shade of yellow using:
echo 255 >/sys/class/leds/green/brightness
echo 64 >/sys/class/leds/red/brightness
There are also a bunch of other parameters inside, but brightness is the only one I tested so far. I think we could use this to control the LEDs via a root-enabled app like LightFlow. Is it possible? It would improve a lot the LED quality.
Yellow would be nice. Maybe if you contact the Appflow dev he could make it work. However i'm not sure I want to install an app just to add 1 color
XblackdemonX said:
Yellow would be nice. Maybe if you contact the Appflow dev he could make it work. However i'm not sure I want to install an app just to add 1 color
Click to expand...
Click to collapse
not just colors, in theory... Blinking speed is theoretically changeable, but it is somehow hard-coded and only blinks slowly for some reason. I'm not even sure if it can be just solid when triggered by a notification
There are a bunch of files inside the red and green led folders, and I guess they are what controls the LEDs flashing speed and all. I say "guess" because maybe they are simply ignored and the blinking speed is hard-coded. But whatever the case is, it seems possible to at least turn the LEDs on via shell scripts
Choose an username... said:
not just colors, in theory... Blinking speed is theoretically changeable, but it is somehow hard-coded and only blinks slowly for some reason. I'm not even sure if it can be just solid when triggered by a notification
There are a bunch of files inside the red and blue led folders, and I guess they are what controls the LEDs flashing speed and all. I say "guess" because maybe they are simply ignored and the blinking speed is hard-coded. But whatever the case is, it seems possible to at least turn the LEDs on via shell scripts
Click to expand...
Click to collapse
Files inside the folder:
I found it extremely disappointing that ZTE gave us only RG lights on the non-Chinese version (I heard the Chinese version has RGB?). For diodes so cheap, I am only led to believe it must have been a manufacturing error on their part. Don't get me wrong, we get more than enough for the price and specs of this beast of a device, but how hard could it be to get RGB LEDs on this device? I really miss multicolour notification lights. This green-red-orange thing gets boring rather quickly.
KwesiJnr said:
I found it extremely disappointing that ZTE gave us only RG lights on the non-Chinese version (I heard the Chinese version has RGB?). For diodes so cheap, I am only led to believe it must have been a manufacturing error on their part. Don't get me wrong, we get more than enough for the price and specs of this beast of a device, but how hard could it be to get RGB LEDs on this device? I really miss multicolour notification lights. This green-red-orange thing gets boring rather quickly.
Click to expand...
Click to collapse
I really miss the RGB led too. I never know when my notification is important or not.
XblackdemonX said:
I really miss the RGB led too. I never know when my notification is important or not.
Click to expand...
Click to collapse
Yeah, bro. Coming from a One M8 with the same RG lights (used for about 2 years, previously a Nexus 5 which was RGB), you would understand