Develop Bugs

screen back light when on external power

Hello and thanks in advance
I have looked but cant fine, forum seem so slow over the last few days or is it me?
Search has stopped working completely for me!
I use phonealarm to perform profile changes on my uni
One is when I put in to car holder/charger it rotates the screen for tt6 turns of wifi turns on Bluetooth ect
But my device will not light the screen up when external power is detected unless it can see Active sync I have tried all combinations of settings with no success
So I thought I could use P/A to run a file or program to turn on the back light I just need to know what file. Any ideas appreciated
Thanks again
John

turn back light to on
hello
has no body any thoughts on this

when u say the device won't light up when you plug in your in-car charger means you screen lights up only for a few minutes and off or when immediately you plug-in the charger, the screen light off..??
and your intention is to light up the screen all the way when you're using it in your car...?

back light is off
hello
if the phone is in standby ,and back light off and i plug in the mains charger the back light comes on , if i plug in the usb sync cable the light comes on if i plug in home made charger ( http://forum.xda-developers.com/showthread.php?t=285768&page=2 post 20 ) the light comes on
but if i plug in any 12volt car charger ( and i have tryed lots from 99p one from the local phone shop to brodit moulded one they will not light the screen
all supply 5v +-.1
i just want it power up the screen when the car is started
so i did wonder if its to do with the extra pin in the mini usb cable maybe its earthed
thankx
John...

towinguk said:
hello
but if i plug in any 12volt car charger ( and i have tryed lots from 99p one from the local phone shop to brodit moulded one they will not light the screen
all supply 5v +-.1
John...
Click to expand...
Click to collapse
There was a discussion about this a long time ago. NOT ALL CAR CHARGERS GIVE OUT THE NECESSARY OUTPUT capable of powering and charging the Universal at the same time. That was the conlusion drawn at the end of the thread. That is also the reason why your Universal does not have the backlight ON even though it is plugged in the car charger. You can modify the lenght of time the backlight is ON if you prefer through the registry, but I doubt that it will charge the Universal to FULL capacity. Just search at the Universal Accessories section about car chargers for research. I think that is where I read it some time ago.

since the first post i now have a o2 orbit and its the same on this phone !!!

Brodit active car holder won't charge the S2

Hey guys,
I got my brodit active car holder now for a few days and it seems it doesn't supply enough juice to the S2 while in use :-(
While navigating with navigon, it even loses charge, though it's connected .... that's really disapointing, since brodit normally supplies quality products.
Anyone else got the brodit active holder with the same problems?
boba

Not got the Brodit, but I have the same problem when using CoPilot and charging via the USB cable attached to a car charger. It can keep the charge at current level with CoPilot on, but will only charge with CoPilot off.
Also noticed if SII has less than 50% charge, it won't charge at all with CoPilot on.
Taking a punt on one of these to see if it makes a difference:
http://www.buyincoins.com/details/d...-for-ipad-iphone-4g-ipod-2a-product-2748.html

Which holder do you have exactly? Can you make a photo?
Does it toggle car dock in the S2? You can see a steering wheel in notification bar.
ALexander

I was thinking exactly the same thing this lunchtime. I have the cigarete lighter active Brodit mount and - if i makes any difference - a 2004 Vauxhall Astra H. I as wondering if I would have to turn off the nice things [like satellite view, etc] on the phone for it to survive the journey. Not happy.

boba23 said:
Well I don't know the exact reason yet, but it seems the S2 doesn't accept enough juice from the charger,
Click to expand...
Click to collapse
Is the S2 in USB AC Mode?
Take a look here: Einstellungen - Telefoninfo - Status
Yesterday I modified a Brodit active car holder from the good old htc HD2 to fit the S2. Now I have fast charging (AC) and Car-Mode.

I currently own some chargers. Not the original one, well the UK Version with no use in Austria.
A 1A HTC Charger with USB socket, a 450mA noname charger with USB socket and a no name car charger with micro usb.
The car charger and the HTC charger show charging(AC) whilst the noname 450mA charger shows charging(USB)...
It would be interesting to measure the exact mA taken by the phone...
ALexander

CurrentWidget doesn't work...
ALexander

Hi all,
Okay, I've now tried four different chargers, and I've also had the phone replaced. Today, in a last attempt, I bought an official Samsung charger.
NONE of them work - even though the phone says "charging on AC" for all of them.
The only thing I haven't tried is a different car (which I'm going to do, once my neighbour gets home).
The one sensible suggestion I've read is that Samsung have screwed up somewhere in software and the phone can't draw enough juice.
Electronics is beyond my little brain, so I don't get why the GS2 charges from my netbook (even when it's only on battery) but won't charge in the car.
And I'm not talking when I'm using satnav. It won't charge at all. In fact (weirdly) it actually DISCHARGES much faster than it does if it's just sitting in my pocket.
I've logged this with my provider (Voda UK), because I refuse to get stuck with a useless phone for the next 18 months if this isn't sorted out. It's ludicrous. If I can't charge the phone in the car it's as good as useless to me.

UPDATE:
Okay, I just tried my neighbour's car (Vauxhall Astra) and the GS2 charged perfectly. 3% in four minutes. Pretty much what I get off the mains charger.
I wish I knew about electrics but I don't. Explanations will have to come from the boffins round here.
I tell you what, though. I don't really want to get a new car just to use my phone properly

Do you have any chsrger with a led?
If the led stays dark the cigarette lighgter of your car might need a new fuse.
Which car?
Sent from my GT-I9100 using XDA Premium App

Ive ordered one of these mounts and will report how it behaves in my 2008 Civic

barneypooch said:
UPDATE:
Okay, I just tried my neighbour's car (Vauxhall Astra) and the GS2 charged perfectly. 3% in four minutes. Pretty much what I get off the mains charger.
I wish I knew about electrics but I don't. Explanations will have to come from the boffins round here.
I tell you what, though. I don't really want to get a new car just to use my phone properly
Click to expand...
Click to collapse
You might be able to change to a higher amp fuse in your car fusebox.

eddablin said:
You might be able to change to a higher amp fuse in your car fusebox.
Click to expand...
Click to collapse
ROFL!! Genius!

Brodit mount arrived and looks great. Fit and design excellent and seems to charge as I would want.
Sent from my GT-I9100 using Tapatalk

So what charger do you guys advice? Which charger does charge the phone, even while navigating with Navigon?

I got the Brodit active charger (BR512...), there isn't a problem with charging at all.
I think the issue you got is really car related. My guess:
a) your cigarette lighter port is poorly wired -> Measure voltage at the port with a voltmeter, it should be at least 12V DC (Edit: Even if it does there is still the possibility that your wiring is bad, showing 12V doesn't mean it can handle the current this charger needs)
b) your cigarette lighter port doesn't make a good contact to the brodit plug. Check for corrosion of the contacts, dust, dirt, etc. Some ports go bad after lots of plug in / out cycles.
If you have no idea what I'm talking about here, I'm pretty sure every car mechanic can fix your problem for a small amount of money
Edit: it's very possible this plug works with other chargers and phones and still fails with the S2 charger. The reason for this is the different ways chargers convert the car's 12V DC into 5V DC. Some might work down to 7V input, some already **** up at 11.8V

I have the same problem with my GSII trying to charge it with my 12V Ipod adapter...
I just arrive from a short travel with my Citroën Xsara and i almost got lost cose the phone discharged all the time while using IGO on the phone...
I don't think this is car related because there are so many people with different cars having this problem... so... Samsung wants me to buy a new car to be able to use their phone in travels?

Hi guys, just thought I'd try to clear up a few of things:
1. All phones can use more power than they can draw. Note that the more apps you use, the more juice you draw depending on their features.
2. Not all CLAs are the same. Most modern devices will need 2amps, but the majority of CLAs on the market are 1 - 1.2amp units.
3. Your device will stop charging if it reaches a certain temperature, without giving you any further indication that it is too hot. This is a common scenario if you've got a phone on the dash giving guidance, with the sun rays beating a back. And yes this does mean dedicated satnav devices have a greater operational temperature range than phones, usually a 15-20 degree difference (celcius).
4. If the CLA is being tripped out due to poor isolation (a lot of cars suffer from this) it will also stop charging.
5. In general terms, the lower the battery level of the device, the more juice it pulls. This is why you may find you ha email no problems getting a small charge when you start with a battery at 85%, but your phone dies if the battery is 50% or less.
Hope that helps.
Sent from my GT-I9100 using XDA Premium App

OK, I have no idea what the problem is. I have a Brodit active charger (the cig-plug version) for my Galaxy SII. It's not charging my phone AT ALL. There is no sound, nothing displayed on my phone when I connect it. I have the charger led (blue light) on, so I know it's working.
Things I have tried so far:
1. Asked for a replacement from Brodit. Got it, no difference.
2. Tried with a different car (I have a BMW, my wife a brand new Toyota Auris) - doesn't charge it either.
3. Tried a different no-name universal charger - it works perfectly well, the phone is charging as expected. Other things like the GPS device also work fine.
4. Tried a different kernel and ROM on my phone, still no success.
Any suggestions are welcome.

LazyPawn said:
OK, I have no idea what the problem is. I have a Brodit active charger (the cig-plug version) for my Galaxy SII. It's not charging my phone AT ALL. There is no sound, nothing displayed on my phone when I connect it. I have the charger led (blue light) on, so I know it's working.
Things I have tried so far:
1. Asked for a replacement from Brodit. Got it, no difference.
2. Tried with a different car (I have a BMW, my wife a brand new Toyota Auris) - doesn't charge it either.
3. Tried a different no-name universal charger - it works perfectly well, the phone is charging as expected. Other things like the GPS device also work fine.
4. Tried a different kernel and ROM on my phone, still no success.
Any suggestions are welcome.
Click to expand...
Click to collapse
Thats strange, in the first place i thought a faulty micro-usb or charger. But you got it replaced so can't be the problem.
I have a brodit with charger too, but i use it in a different way, meaning i can remove my holder and unplug it without unplugging my charger. ( near my holder i have a small connector that i can unplug).
What i did is cutting the cable from the charger and i did put a male usb port on it ( regular male usb port) and i have a Belkin charger with a usb port, this charger deliver 1A charging current and charge my phone even when i use my navigation. ( with bluetooth and gps on).
Your phones micro-usb seems to be fine too because it charge with other brands of chargers.
Your BMW delivers enough power i guess at your cigarette lighter plug, because it doesn't charge at the Toyota either and both not delivering enough power would be coincidence.
Anyway mine works perfect the way i did it and if i can remember it worked too with my original plug attached too. ( though the original one doesn't provide enough power sometimes to keep it charged while using navigation).
The only thing i can think of is that there is some stress-pressure on your connection between phone and holder connection and that one pin isn't connected properly, with the universal charger you only plug the micro-usb plug in your phone and the micro-usb plug can adjust freely to your phones micro-usb port.
Try to wiggle a bit with your phone when in the holder and see if the power comes on. Or try to connect a little device on your holders micro-usb port ( if you have something small that charge over micro-usb) and see if that works.

[Q] Charging led doesn't work anymore

Hello, for about 4 months I'm charging the phone with and magnetic Usb cable, today I've bought another one for my other phone and I tested the cable on the Z1 compact and the screen got blank the phone won't power on when pressed the button, I tought I ve bricked the phone, or the battery. Anyway I've pressed volume up and power for about 5-10 seconds and the phone turned on. It seems it works with no problems it charges, BUT the charging led doesnt work anymore. If I recieve a notification it works, all the colors (tested whatsapp, sms, calls), only when I plugged it to charge the led is off.
L. E : I've measured the pins and the new bought cable has the positive switched with the negative. ?
Any suggestions?

vibecatalin said:
Any suggestions?
Click to expand...
Click to collapse
Don't use cheap crap.

It started working again . It was my mistake that I didn't checked the polarity of the cable. I will reverse the polarity of the cable.

Powering on unit outside of car

Hello,
I recently sold my car and no longer have the need for one of these MTCB units. Like an idiot, I forgot to wipe my information from the unit (Eonon / KLD) before uninstalling it.
The unit is made for plug and play with a Mazda 3. Is there something I can do to power it on without the car, so I can erase all of my information / settings and get it ready for resale. Otherwise I'm not going to feel safe selling it. (Even though I could probably revoke the important accounts from the cloud.)
Thanks.

I used a PC power supply.
You need 3 pins Positive and negative for power and positive for ignition power
Look at the adapter wiring specific for your car and you will figure it out.

DRidilla said:
Hello,
I recently sold my car and no longer have the need for one of these MTCB units. Like an idiot, I forgot to wipe my information from the unit (Eonon / KLD) before uninstalling it.
The unit is made for plug and play with a Mazda 3. Is there something I can do to power it on without the car, so I can erase all of my information / settings and get it ready for resale. Otherwise I'm not going to feel safe selling it. (Even though I could probably revoke the important accounts from the cloud.)
Thanks.
Click to expand...
Click to collapse
dazza007 said:
I used a PC power supply.
You need 3 pins Positive and negative for power and positive for ignition power
Look at the adapter wiring specific for your car and you will figure it out.
Click to expand...
Click to collapse
No need to a PC power supply, an AC Adapter 12v - 2a is sufficient.
Cut the end if the connector and make 3 wire ( 2x positive - 1x negative ).
1 positive, 1 negative wire to the power pins "normally the thin pins" to power up the unit
1 positive wire to the ignition wire to start the unit.

I used a PC power supply, the yellow wires are 12V, black are ground. I just put the battery and ignition wires in the yellow wire plug and the ground in a black wire black on a 4-pin Molex connector.
To turn on the power supply, you have to jumper the green wire to a black wire in the 24-pin motherboard connector.
Make sure the power wires can't touch the ground pins. I kept shorting mine out and took me a couple times to figure out what was happening.

I'm like an absolutely moron with wiring so this sounds fun!
I guess hacking up the adapter is better than never selling the unit anyway. Thanks everyone for all the help.

youtube is your friend when it comes to this.. plenty of video's on it..
I have made one up myself from youtube videos
Sent from my K00C using Tapatalk

Nexus 7 2013 (wifi) no battery mod - car install - otg - power problem

Hi there everyone,
I have been trying to get my Nexus 7 2013 installed into my car seamlessly without problems since December 2015. I have Timur's Kernel v4 (6.0.1) running on it, and it was working flawlessly.
However, I decided that the no battery mod needed to be done as I just could not leave that battery inside a hot car - way too risky.
So, I did the Kevdav no battery mod - with success.
However, once the battery connection was receiving 5v via a usb car charger the OTG cable connected to the tablet's mini usb port would not wake/suspend the tablet properly. It would wake it up, but once it was awake the little battery icon at the top would forever show that it was 'charging' and once power was cut to the otg y cable / mini usb, it would not suspend (would still show as charging).
I did research, and bought a Drok DC-DC step down converter. I lowered the voltage to the battery mod connection to 3.7v (and tested up to 4.7v) and this alleviated the problem of suspend/wake. I think since the original battery gave out less voltage then the otg/charging connection, this needed to be replicated in order for the otg to work.
However, I now have a new problem that I cannot seem to fix. This problem only seems to happen in the car and does not occur when testing it in the house using normal wall chargers.
For clarity, this is how everything is wired up in the car.
Nexus 7 battery mod side of things:
Nexus 7 battery terminals > 22awg usb cable > drok dc dc step down power supply (this board has a female usb port for output) set at 3.7v (tested up to 4.7v) > input is connected to car's constant 12v connected directly to battery on a fused wire.
Nexus 7 mini usb port side of things:
Nexus 7 mini usb port > usb otg y cable > mini usb cable > 2.4a usb car cig adapter hardwired to car's switched 12v accessory wire.
The link to the drok dc dc step down is this - https://www.amazon.co.uk/dp/B01FDBY66Y/ref=twister_B01GO268W6?_encoding=UTF8&psc=1
I turn on acc ignition to send power to the otg connection. It'll power up. However, if left in standby overnight the tablet won't power up. If I physically press the tablet's power button it'll wake up, show the wake up animation, and react as normal (including any subsequent power downs). However, if I don't press the power button and I turn off the ign again, an icon on my car's instrument cluster will be faintly illuminated - this is odd behaviour and should be completely out. When this is the case, if I get out and try to lock the car the remote central locking doesn't work.
This light will go out if I physically disconnect the otg y cable from the tablet, and low and behold the remote central locking works.
I'm no expert on electronics and such, but it seems to me that power may be flooding back into the OTG connection from the no battery mod power?
Does this make sense? Sorry for the long question, but I was wondering if anyone had any experience with troubleshooting or any advice? I've this one problem and then I'm set but I just can't seem to figure anything out and need someone's advice who is in the know rather than take wild stabs in the dark using my own logic because if I do the latter, not only will I waste money on needless components but I'll more than likely break something. I've read stuff about diodes or something in order to regulate power flow but I'm not even sure I'm using the correct terminology here so if anyone can tell me I'm onto something here or I'm talking complete nonsense then anything is appreciated!
I did search these forums and google but I really cannot find anything that is similar to my problem.
Thanks for any input guys, whether it be any tips on what I'm missing or what I need to change (software or hardware, electrical, etc) - it's all very much appreciated.
Antony
Edit: so sorry I think I posted this is the wrong n7 2013 sub section. I can't delete the post but if a mod could please kindly move it to the relevant forum I'd appreciate it. Thanks!

antc101 said:
it seems to me that power may be flooding back into the OTG connection from the no battery mod power?
Click to expand...
Click to collapse
Hi, indeed, and your "2.4a usb car cig adapter hardwired to car's switched 12v accessory wire" requires a small mod to prevent the power feedback. It needs an extra 1A+ diode connected directly to 12V input. You could modify the adapter's PCB or simply replace the fuse's internal wire with a diode where its cathode goes to the spring and its anode to 12V input. Or just place the diode somewhere along the adapter's hardwire. $0.16 1N4001 is good enough ([email protected] is OK for [email protected]).

Not sure if thread is still active but I also have the same symptom with tablet turning off completely overnight. I am running constant 12v to 3.7v dc to dc on battery input and car adapter 12v to 5v on microusb cable in. Tablet will work fine with on and off but after car is shutdown for the night it will not turn on in the morning. It shows me battery charge icon only. I dont have diode installed either. Not sure if thats the cause. Anyone know why it would completly shutdown overnight?

Neo2020Marz said:
Not sure if thread is still active but I also have the same symptom with tablet turning off completely overnight. I am running constant 12v to 3.7v dc to dc on battery input and car adapter 12v to 5v on microusb cable in. Tablet will work fine with on and off but after car is shutdown for the night it will not turn on in the morning. It shows me battery charge icon only. I dont have diode installed either. Not sure if thats the cause. Anyone know why it would completly shutdown overnight?
Click to expand...
Click to collapse
Hi there,
Been a while since I posted on this thread but just wanted to update on what I have done so far.
Since my last post, I don't have any issues. I placed a diode as mentioned above on the +12v for the accessory power. This seemed to have fixed any back flow of power.
Concerning the power off over night, I'm pretty sure this was something to do with Timur's kernel. I forever had issues with that thing - eg, suspect and wake issues, accessories connected to my usb hub..
I switched to a stock version of android 6.0.1 - MOB30X if memory serves... and installed Elemental X version 5.16. No issues with this setup what so ever.

Huh.
I run my Nexus 7 on my car with the battery, mounted just above the dashboard, with direct sunlight exposition and no UV film on the windshield. It's been a whole year without issues, thank God.
https://i.imgur.com/cPNhDDc.jpg
I live in the Northeast of Brazil, where's 30C to 40C through the year. Sometimes I come up to the car and the tablet shut off due to the heat.
Battery still lasts wonders and there's no signs of damage.. yet.
Is it really adamant to remove the battery, or is it just a precautionary measure?

GTMoraes said:
Huh.
I run my Nexus 7 on my car with the battery, mounted just above the dashboard, with direct sunlight exposition and no UV film on the windshield. It's been a whole year without issues, thank God.
https://i.imgur.com/cPNhDDc.jpg
I live in the Northeast of Brazil, where's 30C to 40C through the year. Sometimes I come up to the car and the tablet shut off due to the heat.
Battery still lasts wonders and there's no signs of damage.. yet.
Is it really adamant to remove the battery, or is it just a precautionary measure?
Click to expand...
Click to collapse
You better have more luck.
My nexus was put under the dash and was fine for around 3 years. And it became expanded in just 2 days, separating the screen and the case. So I have urgently remove the battery.