Database Develop

4 port USB hub, 900ma per port

I came across this hub:
http://www.monoprice.com/products/p...d=1030702&p_id=9955&seq=1&format=1#largeimage
Looks pretty nice, all USB 3.0 ports, capable of supplying a 900ma of power to each port. Good for all sorts of things, not just a tablet being connected to the computer.
What I was wondering about this is would it be possible to open it up and short the data pins so that it is only capable of being a charging device? If so, it probably wouldnt even need a connection to a PC, just need to be plugged into the power adapter. I am wondering on this because if possible, that would mean when only using 1 port it (theoretically) would be capable of sending 3.8A out to the one device if the device tried to pull that much. Since the tablet would see the shorted connection it should at least try to pull 2A. Anyway, I just thought it would be a fun project to try and modify in this way. I will probably get it soon and attempt this myself, and might even look into beefing up the internal power circuit area to make sure it can safely send 3+ amps out one port if asked to. It would be nice to use this in conjunction with a pogo connector and finally be able to charge faster than the tablet drains while gaming.

EniGmA1987 said:
... Looks pretty nice, all USB 3.0 ports, ...
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Nexus 10 USB specs "microUSB v2.0"
http://www.gsmarena.com/samsung_google_nexus_10_p8110-5084.php
Would you get value from USB 3.0 ports with a USB v2.0 interface?

To get the full USB 3.0 power of 900mA, the device has to be configured as a USB3.0 device. The hardware developer USB 3.0 command verifier tool is separate from the USB 2.0 one
I thought we had also verified the USB connector and the POGO connector are mutually exclusive in power terms, even if the charging circuit inside the Nexus 10 could be modified to accept more than 2.5A.

skally said:
To get the full USB 3.0 power of 900mA, the device has to be configured as a USB3.0 device. The hardware developer USB 3.0 command verifier tool is separate from the USB 2.0 one
I thought we had also verified the USB connector and the POGO connector are mutually exclusive in power terms, even if the charging circuit inside the Nexus 10 could be modified to accept more than 2.5A.
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Sorry, I dont scour the threads in accessories every day so thats news to me. Besides, I dont even know what "mutually exclusive" is supposed to mean in relation to this. If the pogo connector has a USB end and draws 2A from the power adapter, why wouldnt it be able to draw 2A from any source capable of putting out that much power? Your trying to tell me that the pogo connector somehow signals it is a USB2.0 device? If thats the case it wouldnt be able to draw more than the 500mA. The regular power adapter has a USB output connector after all and it can send 2A just fine. This hub has its own power adapter and doesnt try to draw the full 3.8A through a computer connection. What is the difference between the power adapter that comes with the tablet and a hub that has its own PSU to output that much and more power?
and yes I know it wouldnt transfer at 3.0 data speeds since the tablet has a 2.0 port, but I wouldn't be using the USB port on the tablet. But why would the USB somehow signal that it will only send 500mA through the pogo connector?

EniGmA1987 said:
Sorry, I dont scour the threads in accessories every day so thats news to me. Besides, I dont even know what "mutually exclusive" is supposed to mean in relation to this.
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Mutually exclusive: charge from POGO or USB, but not both at the same time
EniGmA1987 said:
If the pogo connector has a USB end and draws 2A from the power adapter, why wouldnt it be able to draw 2A from any source capable of putting out that much power? Your trying to tell me that the pogo connector somehow signals it is a USB2.0 device? If thats the case it wouldnt be able to draw more than the 500mA. The regular power adapter has a USB output connector after all and it can send 2A just fine. This hub has its own power adapter and doesnt try to draw the full 3.8A through a computer connection. What is the difference between the power adapter that comes with the tablet and a hub that has its own PSU to output that much and more power?
and yes I know it wouldnt transfer at 3.0 data speeds since the tablet has a 2.0 port, but I wouldn't be using the USB port on the tablet. But why would the USB somehow signal that it will only send 500mA through the pogo connector?
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The POGO connector, although it connects to a USB port, is not bound by the USB specification for how much it can draw. USB chargers are available that can deliver up to 3A, but it's up to the device to request this much power.
The specifications for USB 2.0 of 500mA (and 900mA for USB 3.0) are for a power and data connection, but their is an added specification for power only of 1.8A (and 5A for USB 3.0). a hub will generally adhere to the power and data specification, while the USB PSU has no data functionality (this is determined by their being a short circuit on the D+/D- USB pair).
The reason a USB 2.0 device will not draw 900mA from a USB 3.0 port, is because it's the device that negotiates the connection, and as a USB 2.0 device, it will only request the 500mA maximum from the USB 2.0 specification.
Try to think of it this way: an incandescent light bulb will not be any brighter if you increase the power source current.

Ok, but you just said everything I was talking about. So when I modify the hub to get rid of the data connection, and not even connect it to a computer and just have its power supply connected, how would that be different than simply a normal charger? The tablet would be charging through its pogo connector, and it simply plugs into the hub with a 3.8A power supply. So it wouldnt have anything to do with any USB limits then right? Cause the hub is USB3.0 ports capable so it is not like a USB 2.0 hub that wouldnt have the proper internal circuitry to push the 3.8A I will be trying to draw.

EniGmA1987 said:
Ok, but you just said everything I was talking about. So when I modify the hub to get rid of the data connection, and not even connect it to a computer and just have its power supply connected, how would that be different than simply a normal charger? The tablet would be charging through its pogo connector, and it simply plugs into the hub with a 3.8A power supply. So it wouldnt have anything to do with any USB limits then right? Cause the hub is USB3.0 ports capable so it is not like a USB 2.0 hub that wouldnt have the proper internal circuitry to push the 3.8A I will be trying to draw.
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If you short the D+/D- pins, you can then use the hub as a standard charger PSU, capable of delivering 3.8A.
The issue is that current gets pulled, not pushed. It doesn't matter how many Amps you provide, the Nexus 10 charging circuit is only capable of pulling a maximum of 2.5A. (datasheet for the charge circuit can be found here).
From earlier posts (in one of the POGO threads, I think), there were found to be kernel limits restricting the SMB347 charging to 2A.

Anyone using USB c to A 3.0 or 3.1 cables successfully with their note 8?

I have tested with several cables and multiple manufacturers and multiple computers and cannot get a USB3.0/3.1 cable to keep a connection with the PC. USB 2.0 works fine.
I called Samsung and they are telling me that they only support the cable that came with the phone, which is a 2.0 cable. So they don't even support the 3.1 standard they advertise. I am about to return the phone over this. I have not found anyone else having this problem, but I have also not heard that anyone is using USB3 successfully either.

Yes I have success
I transferred over 7gb of data from a pc to a Note8 (sandisk 400gb Sd card) using a choetech USB c 3.1 gen 2 superspeed cable. The pc has superspeed ports (Alienware Area 51). Did not have any issue the two times ive connected the note 8 to a pc.

I have a type C to 3.1 type A cable from Anker, but have only used it on 3.0 ports on my laptop and desktop, definitely works super fast (even flashing the firmware with Odin - only takes a few seconds for the full package). I ordered 2 different cables though, one was apparently charging-only and didn't even work to fast charge.

marctronixx said:
I transferred over 7gb of data from a pc to a Note8 (sandisk 400gb Sd card) using a choetech USB c 3.1 gen 2 superspeed cable. The pc has superspeed ports (Alienware Area 51). Did not have any issue the two times ive connected the note 8 to a pc.
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same here using usb 3.0 cables with this phone, ZERO issues

Kalm_Traveler said:
I have a type C to 3.1 type A cable from Anker, but have only used it on 3.0 ports on my laptop and desktop, definitely works super fast (even flashing the firmware with Odin - only takes a few seconds for the full package). I ordered 2 different cables though, one was apparently charging-only and didn't even work to fast charge.
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I was planning to buy Anker Powerline Plus USB - C to USB A 3.0 cable. Isn't the cable good enough to fast charge the phone? Doesn't it charge as fast as the regular one (which came in the box) does? How much max current can be drawn using anker cable to charge note 8 and how much time does it takes to fully charge the device with anker cable compared to the original one?
Kindly provide these details, as I am confused whether to buy this cable or not.
TIA..

I have Trilink braided USB-C 3.1 cables that I bought on Amazon. They work perfect, super fast transfer speeds, and my phone charges the same as with the OEM cable that it comes with.

ParrSt said:
I have tested with several cables and multiple manufacturers and multiple computers and cannot get a USB3.0/3.1 cable to keep a connection with the PC. USB 2.0 works fine.
I called Samsung and they are telling me that they only support the cable that came with the phone, which is a 2.0 cable. So they don't even support the 3.1 standard they advertise. I am about to return the phone over this. I have not found anyone else having this problem, but I have also not heard that anyone is using USB3 successfully either.
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Does your PC actually support USB 3.0+ and are the ports setup correctly? Too many motherboard manufacturers poorly implemented USB 3.0 on their rushed motherboard, and Microsoft had to suffer the long end by providing poorly patched drivers because the boards never had the proper port insulations.

Jammol said:
Does your PC actually support USB 3.0+ and are the ports setup correctly? Too many motherboard manufacturers poorly implemented USB 3.0 on their rushed motherboard, and Microsoft had to suffer the long end by providing poorly patched drivers because the boards never had the proper port insulations.
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I will look into this but one is a brand new Dell Latitude and the USB 3 worked on my desktop with my S5.
Bob

USB transfers very slow

Hi, I'm connected via the stock Samsung cable to a USB3.1 port running Windows 10 onto a fast Samsung NVMe internal drive. Latest Samsung drivers installed. Transfers from the phone (S10e SD) are averaging about 50MB/sec. I was expecting a lot higher speed. An SSD in USB 3.0 enclosure and good USB stick are transferring the same large files at 400+ & 200+, but the phone is barely above USB 2.0 speed. Am I missing something?

Sorry for the bump but i could confirm that the super tiny and short USB cable in the box is 2.0... I don´t understand why...It is that the cable was in the original S10 box otherwise i thought it was a cheap clone... It works great with USB 3.0 cables from Ugreen but you need to buy it by yourself...

I would assume you have USB 3.0 support on your computer if you have an NVME drive. If that's the case, have you checked the drivers for your USB slots that use 3.0 on your Windows 10 machine?
When you say transfer with other devices do you mean transferring to/from your phone or to/from your computer?

Yes, RyZen rig with properly functioning USB. SSD in a USB enclosure transfers same files at over 400MB/sec. Phone is slow in both directions. This is from internal storage, not micro SD. Hopefully this isn't "normal" for this device, I was looking forward to upgrading this speed over my USB 2.0 S7.

I tried another cable, same result. Then I ordered up some cables that were explicitly touted as USB 3.0 cables, and had blue connectors. Transfer speed jumped WAY up. It appears the cable Samsung provides is USB 2.0 only. Lame of Samsung to skimp out on the cheapest part in the box & make their flagship look bad in the process. Well, at least the stock cable will do fine as a car charging wire.

How do I stop Quick Charging

Whenever I connect my Phone to my Laptop(Matebook X Pro), it quick charges my phone. (connection via usb c to usb c)
Is there a way I can stop that from happening and my phone leeching the battery from laptop so fast? OR stop charging it all together
Because usually I only connect my phone to laptop for roms and rooting and today for Android Q. I would charge my phone before doing these things hence I don't need my phone to suck out from laptop during this. I wonder if there is a way to reduce how much power the laptop is outputting. or turn it off all together
Besides, I have a powerbank for both my laptop and phone so if I am out and about, I'd charge the phone from the battery, it's less efficient to send it from battery to laptop to phone.

You'll probably need a custom kernel with special settings for that, as they usually try to speedup the charging instead, but I recall some bugged kernel/ROM versions (for another device that was; the Nexus 6P) which prevented fast-charging when not using an official QC adapter (like connecting it to the charge USB-port of your laptop; and that kinda sounds like what you're after). Many modern laptops have special charger-ports, sometimes even with QC support, so did you try another USB-port to see if perhaps charges slower ?

SKiLLa XP said:
You'll probably need a custom kernel with special settings for that, as they usually try to speedup the charging instead, but I recall some bugged kernel/ROM versions (for another device that was; the Nexus 6P) which prevented fast-charging when not using an official QC adapter (like connecting it to the charge USB-port of your laptop; and that kinda sounds like what you're after). Many modern laptops have special charger-ports, sometimes even with QC support, so did you try another USB-port to see if perhaps charges slower ?
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You see, when I'm out and about I only carry usb c to USB c cable so I can't check other ports. Both of the USB C ports are USB PD :/
Sent from my Xiaomi MI 9 using XDA Labs

Use a cheap legacy micro usb cable plus type c adapter. Since its hard to find bad quality usb c cable. It wont pass high current to your phone. Bad quality cable usually have very thin wire..

Help me pick the best cable for Note 9.

First it must be USB type c to USB A. 3.0
What USB standard nobody seems to know. For sure but most tell me its a USB 3.0 At the A end.
And USB Type C at the other end.
Next we need to know what is required in the cable to support Dex.
Next we need to know what is required to support Samsung Fast Charge standard. I hear its not the same as Quick Charge.
Is there any cable out there that does all these things.
I know the cable that comes with the phone does not do this.
i.e. I fails in the USB transfer speed dept.
In short.
Dex compatible,
Fast Charge compatible. As per this link we only need Fast Charge 2.0
But I wonder why does Samsung Claim to use its own standard. i.e. what is the diffirence between the Samsung standard and QC standard.
https://www.qualcomm.com/media/documents/files/quick-charge-device-list.pdf
USB 3.0 Standard compatible for high speed data transfer.
(They say if the USB A port is blue and has more than 4 pads it will work).
Ps: So far I have figured that my wifes One Plus 6 cable does all these jobs.

Answering my own question.
Got to amazon.
Search using this text usb type c to usb a 3.1
I got an amazon Basic from the search the USB A port is blue in color an indication that it is 3.0 It does everything Dex, fast speed transfer and fast charge.

Glad that you managed to get your cable. But for future reference any standard USB A 3.0 - Type - C charging cable will be good. However beware of multi-plug to USB A 3.0 cables as they don't have the best charging speeds, unless you have a high wattage power supply.

I'm using a nice quality INIU cable, has nice quality braided cover, a led for dark car charging, to see cable.