Database Develop

[Q] Simultaneous OTG host mode and charging?

I know a few other phones have managed to enable OTG host mode and charging simultaneously via a resistor on pin 4 (ID/sense) of the usb port. This apparently enables dock mode. I know the SIII does it as well as some xperias. Anyone know if the note has a mode like this, and what the resistor value is? Galaxy nexus its possible to patch the kernal to disable the boost mode from internal battery on OTG host mode. Anyone done anything for the note?

Geekybiker said:
I know a few other phones have managed to enable OTG host mode and charging simultaneously via a resistor on pin 4 (ID/sense) of the usb port. This apparently enables dock mode. I know the SIII does it as well as some xperias. Anyone know if the note has a mode like this, and what the resistor value is? Galaxy nexus its possible to patch the kernal to disable the boost mode from internal battery on OTG host mode. Anyone done anything for the note?
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In my limited knowledge, I have just tried one of these with no success. No mods to the cable or the kernel or anything. Just wishfully hoping it might work. It does not. I am not even sure it is getting power to the USB device properly. I am trying to run a small Seagate FreeAgent disk drive. As expected, it runs fine when plugged into a USB port on my desktop or laptop. Plugged into the OTG using the standard OTG-type cable or this Y cable - without additional power - yields nothing as I would expect. Applying supplemental power to the Y cable from either a PC USB port or from the phone's charger gets the drive making a little noise and lighting up. But the phone still does not recognize the device. And I hear this slight pulsing noise from the disk itself that is not heard when plugged into the PC. Alas! Perhaps it needs yet more power. But all I have is either what comes from the USB port on the computer or the 1A max from my phone's charger.
Added later...
I have actually discovered that the Y cable works as a normal (not power supplemented) OTG cable for thumb drives, etc. But adding supplemental power to the thing makes everything stop working. The thumb drive which was working prior to adding the power cable stops working. With my Seagate drive (which requires additional power) plugging the Y cable into my phone makes the drive shut down after a few seconds.

USB vs AC power

I saw in the packaging that it says AC power is "recommended", so naturally I wanted the best possible experience and hooked mine up with AC power. I was just curious why this is? It would be much easier (and more portable) if I just used USB, but what am I losing by doing this?
I assumed this had to do with the CEC options to allow my TV to power on thru the Chromecast, however I have been unsuccessful in making that work fully. It will turn the TV on only if I turned it off while on the correct input for the chromecast...so kinda useless so far.

GatorsUF said:
I saw in the packaging that it says AC power is "recommended", so naturally I wanted the best possible experience and hooked mine up with AC power. I was just curious why this is? It would be much easier (and more portable) if I just used USB, but what am I losing by doing this?
I assumed this had to do with the CEC options to allow my TV to power on thru the Chromecast, however I have been unsuccessful in making that work fully. It will turn the TV on only if I turned it off while on the correct input for the chromecast...so kinda useless so far.
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USB power might not be enough to drive the usb stick, while that AC adapter is guaranteed to deliver 850mAh
if your TV's USB is part of an unpowered hub, and you have other devices(or internal devices) powering off that hub, the chromecast might not get enough amperage (500mAh/port per USB standard)

Cool what would be the result of not enough mAh? Meaning if my USB port powers the device am I good, or will I suffer some Wi-Fi signal loss if the mAh is too low?
Sent from my SCH-I535 using Tapatalk HD

GatorsUF said:
Cool what would be the result of not enough mAh? Meaning if my USB port powers the device am I good, or will I suffer some Wi-Fi signal loss if the mAh is too low?
Sent from my SCH-I535 using Tapatalk HD
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I think it just wouldn't turn on.
Another benefit of AC power is that when you hit cast something, it'll automatically turn on the TV.

That is what I was curious of. So the auto turn on feature won't function on USB power? Only A/C power?
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GatorsUF said:
That is what I was curious of. So the auto turn on feature won't function on USB power? Only A/C power?
Sent from my SCH-I535 using Tapatalk HD
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Well the chromecast needs to be on already for it to turn on the TV.
If the TV is off, the chromecast won't be getting any power so you need to turn on the TV to turn on the Chromecast.

Right, not a big deal for me since that feature doesn't seem to work on my TV anyways. I am using AC power atm. If that's all I'm missing I might aim for portability.
Thanks
Sent from my SCH-I535 using Tapatalk HD

I'm using USB power off of the TV and have no issues with anything..

Original USB cable issue !

Hi,
I'm reporting that my original Sony made USB cable have some issues:
first charge - all fine new phone was not turned on before i plugged usb cable to do a first charge
second charge - plugging usb cable has no effect on the phone at all i unplug it and plug it again no reaction then i decided (it was very late) to plug it to my nexus charger and nexus cable - it charges fine !
third - i decided to check if the Sony charger is any good so i used nexus usb cable with original charger - all fine phone charges, then i tried Sony usb cable with other devices - nexus 7 is charging, HTC One X is charging then i tried to flex that cable at every part - no effect
now I'm afraid that it is dangerous to use it - i put it in a cabinet and waiting for response from Sony support...

Raider0001 said:
Hi,
I'm reporting that my original Sony made USB cable have some issues:
first charge - all fine new phone was not turned on before i plugged usb cable to do a first charge
second charge - plugging usb cable has no effect on the phone at all i unplug it and plug it again no reaction then i decided (it was very late) to plug it to my nexus charger and nexus cable - it charges fine !
third - i decided to check if the Sony charger is any good so i used nexus usb cable with original charger - all fine phone charges, then i tried Sony usb cable with other devices - nexus 7 is charging, HTC One X is charging then i tried to flex that cable at every part - no effect
now I'm afraid that it is dangerous to use it - i put it in a cabinet and waiting for response from Sony support...
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Click to collapse
sony support won't say anything more than this; take to ur region service for repair/replacement
:good:

so you are having a complaint over a usb cable that costs what? pennies...probably a defective cable

cable is not the problem - phone destruction is

The cable wont destruct your phone.
Gesendet von meinem C6603 mit Tapatalk

Help making OTG cable with power (solved)

Hi
Iv'e tried a lot of the guides on how to make the OTG cable with power but I can't get it to work.
What I tried:
The OTG cable I have from before, but I need it to deliver power.
Every thing works with no power connected, but as soon as i apply power it wont work.
I've been trying to cut the cable in the middle only the red and the black wire, and than ad power to those cables from an usb adapter but as soon as I add power the OTG stops working, and my nexus is not charging.
Iv'e tried adding double the power, cut the black and red wire in the OTG cable, than add 2 USB adapters one sending power to the female USB and one sending power to the micro USB for the Nexus, still nothing.
Tried adding power to black going to both devices and red only to nexus, still nothing.
What am I doing wrong?

Are you using a kernel that supports USB OTG charging? To get mine to charge I have to plug the power into the OTG cable and then plug it into my device.

Hi
Im using timurs kernel seence im going to install it in my car

isn't there a sequence to how you connect it, even with timurs?
like otg first then plugging in the charging USB.

dilldoe said:
isn't there a sequence to how you connect it, even with timurs?
like otg first then plugging in the charging USB.
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I think i tried them all.
Bit also when its mounted inn The car i cant do an sequence every time i start The car

I found the problem.
The people making the OTG cable have had some fun and used white cable for power and red for data, no wounder I couldn't get it to work

What wire lines of the usb does android auto use?

Usb has 4 (generally) wires Red and Black for +-5v and another two for data (most often white, green).
The question is: Do i need all 4 wires for car head unit to recognize android auto by connecting the usb?
If i cut voltage (red and black wires) will it still recognize it?
If not, if i give external voltage to phone to red and black wires i have cute, will it work now or not again?
My main problem for asking this, is that car head unit does not provide much voltage when connecting phone for android auto and decharging slowly..
I am sure if i cut voltage wires as i describe above and connected to a light charger i will have more voltage.
But i afraid destroying head unit so i prefer to cut voltage of head unit, and use only voltage from lighter charger..
Any info about this?
I am actually going to install permanently an old phone to the head unit only for android auto.. And i want to be changed.

Anyway i decided to destroy a cable to find out myself..
By only cutting red wire, android auto loose connection...
But how does it see it?.. If i put a resistor or something could i trick it?..
If anyone know would be very helpful.
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Hi Sosimple
I have no possibility of trying it myself but I guess there are two possible problems that cause Android auto to stop working.
1: mobile
Your phone recognises that it isn't being charged so there can't be a Android auto connection. To test this out, connect a charger to your modified cable (connect plus and minus to the charger and d+ and d- to the car)
2: car
Your car recognises that there is no draw at the USB port, so no smartphone is connected (this is unlikely though, because the smartphone could have a full battery). To test this, try putting a resistor in between plus and minus of the cable. (10Ohm~500mA so don't go below 10Ohm. Try higher resistors first)
If none of the above work, consider buying a USB y cable (used for external HDD) to cross out possible mistakes
Regards

Thanks. I will test a resistore some day..
My car (intellilink system is called, opel corsa) has 1 usb only. But you can connect a 4 port usb switch, so to use 1 port for a usb stick with mp3, and another usb to connect phone for android auto at the same time.
And working fine this way.
If i use a y cable to connect it 1st usb to lighter charger, 2nd microusb to phone, and 3rd usb to usb switch, i really don't know what is going to happened regarding voltages. If there is any danger for the intellilink system of opel corsa.
I don't care if anything happens to phone as i have an old to test, or the switch, as it is cheap, but i do care for intellilink as it is expensive. That's why i haven't test a y cable..
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If Android auto works with the switch, no need for trying a resistor (because only the switch could measure the current draw)
So the reason it doesn't work must be the missing charge voltage at your phone. Did you try connecting + and - to a charger?
Your switch gave me another idea. Try finding a powered switch (a USB powered or directly 12v powered one). Those switches with external power exist and they could provide enough amps to charge your phone while using Android Auto.

m00str said:
If Android auto works with the switch, no need for trying a resistor (because only the switch could measure the current draw)
So the reason it doesn't work must be the missing charge voltage at your phone. Did you try connecting + and - to a charger?
Your switch gave me another idea. Try finding a powered switch (a USB powered or directly 12v powered one). Those switches with external power exist and they could provide enough amps to charge your phone while using Android Auto.
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Yes i also had the idea to take a powered usb switch. I couldn't find one where i live yet..
Although if i found one, i also have the fear if i could harm cars intellilink system..
Because: Intellilink takes voltage from cars battery and give voltage to usb.
If i then i take a powered usb switch, which i will connect it to usb charger lighter (which takes voltage from car battery) and connect then the switch to usb of intellilink system, who really knows what happens Regarding voltages? All take power from cars battery. I don't know if i can connect them without destroing intellilink system..
Thing become to complicated to be sure what will happened.
I read alot in forums but haven't read something similar..
Anyway if i test it, i will post the result..
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Those external powered switches usually separate input data and output voltage completely, so there is most likely no connection at all
The point that both devices are powered by the same source (car battery) even reduces the risks of damage because of the same minus/ground potential. (I would even connect the minus poles of all devices if I soldered myself a y cable, just to have all GNDs connected, but there is no need to do so.)
Can't you order one from Amazon or eBay? I don't know where you are from but most Chinese or Hong Kong sellers (eBay) ship almost worldwide.
I hope it works for you somehow.

I probably will create one by muself.. I live in Greece. I have already created one, doing something similar. With an on/off button i choose if i will change phone from usb charger from lighter OR connect to intellilink (and disconect from usb lighter charger at the same time)..
I experiment with this. It looks to work well as in on i have intellilink connection, android auto, and in off i disconect from intellilink but charge from usb charger in lighter..
I'll keep this for some time..
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