Is it possible to enable simultaneous charging and OTG capabilities? I had used this before on a Nexus 7 so I could feed realtime vehicle data into the tablet for digital gauges without running the battery into the ground, and really want to do the same on my 6P.
Xero said:
Is it possible to enable simultaneous charging and OTG capabilities? I had used this before on a Nexus 7 so I could feed realtime vehicle data into the tablet for digital gauges without running the battery into the ground, and really want to do the same on my 6P.
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OK, so I'm confused about what you are trying to do here.
OTG means the phone is the host to another device, and is powering that device. Like an OTG flash drive. If the phone is powering that device... then no, it isn't charging.
If the phone is receiving power and data from the device it is attached to, then that's pretty normal. It's like plugging it into a PC, right?
To my knowledge, Y splitters are strictly prohibited for Type-C devices, so you cannot add a 3rd device into this scenario. As such, if the phone has to power the device attached to it, and therefore it isn't receiving power from that device, then there is no way to simultaneously charge the phone.
The only scenario I can think of which would fit your description would be this: You connect your Nexus 6p to a USB device which is powered by an alternative source, so that isn't going to draw power from the phone... However, that same device is incapable of providing any power at all to the 6P, yet data is still expected to go between the two devices. If this is in fact the scenario you are describing, then get different equipment, because that manufacturer ignored just about every USB requirement and specification known to man.
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Hey all,
Nowerdays there r cheap car radios with a USB-connector. So i asked myself if it would be possible to get the touch hd synchronized und loaded with only one usb-cable?
On the one hand it would get loaded by the radio and the other hand i could hear the music from the touch hd, with a direct connection.
Is that possible? If yes...with every Radio? what r the attentions i have to look for?
I assume with 'loaded' you mean 'charged'?
The car radio will have generic USB storage drivers, so HD could work as (overpriced/sized) USB memory stick. But to the radio, it would be only that, just a dumb USB memory. You can't use HTC player software.
Depending on the radio, it may have problems with long filenames, or files not in the root, or memory larger then 2Gb. And of course it may not play all MP3 sub-formats. But if the radio is recent, it probably plays most common formats and even larger USB memory.
Charging should work, but the radio may not be set up to deliver the full 500mA power so charging may be slow. Since the HTC is powered on, it may even consume more than it charges.
ye sry, i mean charge ofc
well...i wanted to use my hd for navigation and thought it would be nice to hear the files of my hd (ofc the radio needs to have mp3-support).
but the radio may not be set up to deliver the full 500mA power so charging may be slow
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so charging is in general with 500mA? doesn't matter if connected to pc or directly at electricity? in that case i would have to look at it at the radio, maybe there r differences
usb charge if given 5volt usb is spc'd to provide max .5amps
amps are not pushed they are drawn so if you connect something
which draw .5amps it dont matter if you connect it to something
which can provide 1000amps
a device draw as much as it's resistence set it to
ohms law
amp == volt / ohm
It doesn't work that way AFAIK.
I tested it with Omnia before, with a simple FM transmitter...
I have installed a Blaupunkt headunit quite recently in my car, and I will try my Touch HD in drive mode with it when I go home from work...
I'll let you know the result...
Correct, current is drawn and if a device draws only 500mA, it does not matter how much the supply can deliver. However, if the supply can only deliver less, like 150mA, you cannot draw more from it. So it is always the minimum of supply and demand.
As to the USB-HTC:
USB can officially deliver up to 500mA, but equally officially, a device needs to first *ask* how much power it is allowed to take.
If the HTC detects a real USB data connection, it will ask the computer how much it is allowed to draw, which will never be more than 500mA, but it may even be less.
Your radio is a real USB data connection BUT as it was designed for only memory, it may not have the actual hardware to go up to 500mA. Or it may not have the communication protocol installed needed to answer a power-query. Therefore it may max out at 100mA.
If the HTC detects a 'dumb' power source (without data connection, only with power) it will draw 500mA.
If the HTC detects a 'dumb' power source with the 2th pin (pin B on the mini-USB) connected to ground, it assumes a extra powerful supply and will draw up to 2000mA.
The USB slot on my Sony car stereo will not charge the HTC Touch HD - not enough power. It will charge my old Polaris, however.
MY carradio charges the phone ...
but connecting as usb drive and charing the same time is working only some minutes before´the phone is stopping to work..
-- reset needet.
so still charing possible if using as navigation system or music usb drive without charging.. don't know why.
Is there any way to set up the Nexus 7 to charge while in OTG host mode? There seems to be a way using a Y cable and a kernel tweak to accept a charge while in host mode to get it to work on the galaxy nexus. Is anyone familiar with this concept and it's possibility of being applied to the N7?
I'm curious about this also as I would like to charge while using otg with a micro sd reader.
I just noticed that when I connect my ZTE Warp to my N7, the Warp starts taking a charge. Pretty handy if your phone is about to die and you're nowhere near power. My vote is for the Y cable. Whoever markets it first is gonna get paid! I'd buy one.
There is already a Samsung cable, I have ordered one, will let u know if it works.
Check out this item I found on eBay: http://pages.ebay.com/link/?nav=item.view&id=110931117836
karl0ss said:
There is already a Samsung cable, I have ordered one, will let u know if it works.
Check out this item I found on eBay: ...
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This is a question for me as well - if it work hope all other Android device are compatible, like XPERIA-s.
There are two different charging states being discussed here. The first is zyperion's, which is the desire to charge the Nexus 7 while the Nexus 7 is acting as a host. The second is Cosa44's, which correctly points out that the host will power the connected device. These two charging states are at odds with each other because the host can't act as a host and provide power while also charging itself; power can't flow both ways. The cable that karl0ss bought is for providing additional power to the connected device, not for charging the host.
With all that said, I do remember reading about a kernel mod for another device (might have been one of the Galaxy phones) where the kernel can enter host mode without providing power to the connected device, freeing the power pins to charge the host. However, this would require an external power source for the connected device so it's not exactly convenient on the go, and it also requires an adapter that doesn't exist yet (you'd have to make it yourself).
host mode charging
AZImmortal said:
There are two different charging states being discussed here. The first is zyperion's, which is the desire to charge the Nexus 7 while the Nexus 7 is acting as a host. The second is Cosa44's, which correctly points out that the host will power the connected device. These two charging states are at odds with each other because the host can't act as a host and provide power while also charging itself; power can't flow both ways. The cable that karl0ss bought is for providing additional power to the connected device, not for charging the host.
With all that said, I do remember reading about a kernel mod for another device (might have been one of the Galaxy phones) where the kernel can enter host mode without providing power to the connected device, freeing the power pins to charge the host. However, this would require an external power source for the connected device so it's not exactly convenient on the go, and it also requires an adapter that doesn't exist yet (you'd have to make it yourself).
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I've been looking into this because I would like to be able to charge my nexus 7 while using a keyboard and mouse. I know that at least one person has come up with a kernel mod for the nexus 7 that will allow host mode charging. For example:
rootzwiki DOT com/topic/37755-timurs-kernel-robust-usb-host-power-management-nexus-7-like-a-pc/
(sorry I can't post links yet)
I don't understand some of what they're saying and I don't know whether I would be able to do the mod on my nexus 7 without running into difficulties. What I would really like is for google to provide a solution that you can just download -- the way they came up with Media Importer, so now people like me don't have to root in order to use a flash drive. But that seems unlikely in the case of host mode charging.
Now I have a question. I'm quite skilled enough to make a Y-connector like this:
sites.google DOT com/site/sonicboomworld/_/rsrc/1345753009582/my-projects/otg-diagrams/Y_OTG_CABLE.png[/url]
so what would happen if I connected my stock nexus 7 to a slave device and charger with such a cable?
What about using the pogo pins to charge like the gnex ?
Sent from my LG-LS860 using Tapatalk 2
I'm using Android Headunit Reloaded which uses a USB cable to connect between my phone and my 7" TabA. The tablet ends up charging the phone. I was wondering if there was a way to prevent this- or even better- to have a y-splitter OTG cable to charge the tab and one for the phone. I suppose this would require custom kernels?
Any ideas would be helpful. Thanks.
I got a Fire HD 8 tablet with Carplaylink to get Apple CarPlay working in an old car I use. I need a USB OTG cable that DOES support charging an Android tablet.
I did a 20-30 minute search myself and all the USB OTG cables I’ve seen openly stated that charging for Android tablets and phones are not supported.
Any suggestions ?
ahmadka said:
I got a Fire HD 8 tablet with Carplaylink to get Apple CarPlay working in an old car I use. I need a USB OTG cable that DOES support charging an Android tablet.
I did a 20-30 minute search myself and all the USB OTG cables I’ve seen openly stated that charging for Android tablets and phones are not supported.
Any suggestions ?
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Can you use an USB-OTG while charging. Can you find a charging contact point with VCHG, open your Fire tablet, find VCHG contact point and measure the VCHG contact point using the voltmeter.
The USB-OTG with microUSB port input can be used for Fire TV Stick.
I had one cable that did exactly this a few years ago and I for the life of me don't know what happened to it. now when it comes to OTG you should just have a separate piece of the cable splitting off that you would plug into the wall yeah and the rest of the wiring would make its way where it needs to. now here's where the tricky part comes in terms of whether a device supports charging through USB OTG. I know the fire tablets support this because you may not be using adb or OTG for any particular reason, and your tablet will charge whatever it is plugged into with that cable. If the OTG cable is built properly then theoretically it should charge your tablet as well. But really good and decent cables are hard to come by, that aren't really expensive. however when it comes to something like this I would stay closer to a name brand because you can get ripped off pretty easily even if you read the fine print and find out that it doesn't do what it says. There are no real big laws or regulations behind the cheap charger and wire industry, so you pretty much get what you pay for. It's just a matter of finding the right one.
Hello guys,
Does anyone knows if there is a otg cable/hub that can power the tablet and be able to use data like usb connected at the same time?
Thanks
The 2019 tablet does not need this, since the port is USB type C albeit USB 2.0; I have connected mine to a hub and have pass-through charging and data. OTG is not really a thing any more since USB type C came about.
Prostheta said:
The 2019 tablet does not need this, since the port is USB type C albeit USB 2.0; I have connected mine to a hub and have pass-through charging and data. OTG is not really a thing any more since USB type C came about.
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Can you share the type of hub you have been used?
Is the charging speed fine?
Kingston Nucleum. This tablet is in my car and the hub receives power from a 12-14v converter providing USB C PD and USB 3.0 fast charge. Ultimately, the hub defaults charging voltage to that of the lowest device connected. In my case a Sandisk SSD and a Meizu HiFi DAC Pro. This generally means that charging is slow, however it depends on your configuration. I'd say that the charging speed is fine, however it only charges when the car is running or in accessory mode and the tablet is always on in that state. As such the excess power it uses to charge whilst running is only a little more than it uses. It might charge faster if I power the hub from the USB C PD port, however I don't know if this is just pure amps or whether it negotiates higher charging voltages. I don't know if the Nucleum hub allows negotiation of higher charging voltages.
Prostheta said:
Kingston Nucleum. This tablet is in my car and the hub receives power from a 12-14v converter providing USB C PD and USB 3.0 fast charge. Ultimately, the hub defaults charging voltage to that of the lowest device connected. In my case a Sandisk SSD and a Meizu HiFi DAC Pro. This generally means that charging is slow, however it depends on your configuration. I'd say that the charging speed is fine, however it only charges when the car is running or in accessory mode and the tablet is always on in that state. As such the excess power it uses to charge whilst running is only a little more than it uses. It might charge faster if I power the hub from the USB C PD port, however I don't know if this is just pure amps or whether it negotiates higher charging voltages. I don't know if the Nucleum hub allows negotiation of higher charging voltages.
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Nice, i'm using for the same purpose.
In my dash car
I'm also using MacroDroid for automation.
My issue right now is how should i leave the tablet when i turn ignition off.
I Think i will just shut it down, but i don't like to wait 30 seconds to but again when i turn it on.
What do you do in your case?
I'll have to check out MacroDroid. I'm currently set up with AutoMate, however there's a few annoyances which I think need ironing out. Vanilla Android Auto might not be the most exciting, but it's certainly the most friendly for driving safety.
I leave my tablet as-is. AutoMate automatically wakes the tablet into car mode on USB power and goes to sleep when it loses that. My car (Chrysler 300C) has accessory power for 30s (I think I can increase this in the EVIC) after the ignition is turned off which keeps the charger energised, and by extension the tablet. I'm not too bothered about having to boot up the tablet if it does discharge its battery to shutdown. I think it's maybe a week or so for it to do that, likely less when the tablet ages. As long as it charges and runs on the supply happily I think we're good. In that instance, I might have to see whether an auxiliary power bank would be a workable option. Not at this stage though. Bear in mind that most modern car head units still take about the same amount of time to boot as an Android tablet anyway.
I'm having minor USB issues myself, however this is down to the cable I need not being available. A lot of USB C "charging" cables are only pinned for power and not data. This might be part of any USB C issues you might be having. I myself need a USB C male with a tight 90° or 180° turn, out to a USB C female for the hub's pigtail. I might have to make the choice to fabricobble myself a USB cable just for this purpose....
This is a photo of the install, prior to me wrapping it in 3M brushed black steel vinyl.
I'm updating all of my comments in various threads on this. My setup with the Kingston Nucleum hubis having minor issues. The tablet still needs to be powered up before I turn on the car or at least supply power to the hub. It seems that if this is done the other way around, that is, to power on the car accessories (and hence the hub) then it seems to end up staying as the "device in charge" of the USB network. The tablet charges (slowly) but doesn't mount the USB SSD drive or the USB DAC. If the tablet is powering the hub (in charge, so to speak) then applying power to the hub via the car accessory supply has it working as expected. This does mean that the tablet ends up with a power drain when the car/USB power supply is powered down which isn't ideal. I've gotten into the habit of turning the tablet off when I park for long periods of time, however I need to boot it up to "take charge" of the USB hub network before I can start the car. It's a bit of a bummer.
I'm unsure whether this is a tablet hardware/software issue, the hub or whatever. Going into Android settings and trying to alter the default USB behaviour returns the message that it "cannot switch roles" or something along those lines. I'm beginning to think that this might be the USB hub refusing to switch/relinquish power supply roles once it has external power and hence not allowing the tablet to mount drives or see connected USB devices. It's weird behaviour, because you'd imagine that if the hub were connected to a laptop this would be a common action.
If it helps, I've read that OTG function is not included by Samsung for their device's USB ports. I've been trying to connect some together to perform file transfers with no success. However, I have been able to transfer and charge simultaneously between my SM-T510 tablet and PCs with the USB configuration set to file transfer.
Prostheta said:
The 2019 tablet does not need this, since the port is USB type C albeit USB 2.0; I have connected mine to a hub and have pass-through charging and data. OTG is not really a thing any more since USB type C came about.
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How to transfare Battery power from Tab to another Android device?