USB 3 port interference with 2.4GHz wireless devices on N2

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hsu95066
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USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Sat May 11, 2019 5:49 pm

Hi,

When I plugged in the USB 3 camera on the N2, the wireless keyboard and mouse did not respond.
However, if I change the wireless dongle and USB 3 cameras on different USB 3 ports, the keyboard and mouse maybe work fine or not.
The other two sets of wireless keyboards also have similar problems.
If I replace the wire keyboard and mouse, there is no problem with hanging up or delaying the response.

I remembered that I have read the article that USB 3 port interferes with wireless mouse.
Has anyone else encountered similar problems?

There is no such issue even thouth XU4 plugged in two USB 3 cameras and a wireless dongle of keyboard and mouse.
Last edited by hsu95066 on Thu May 16, 2019 12:27 pm, edited 1 time in total.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by BadPritt » Sun May 12, 2019 12:52 am

Hi. This is indeed a problem wit the N2. I've got it too, and I guess everyone else too?
I use the microUSB OTG port with a USB2 hub for everything that's 2.4Ghz. And the USB3 ports only for USB3 devices.
This way there is no problem.
I also tried with the USB hub connected to a USB3 port. But then I had the problem that all USB ports suddenly stop working.

I've also just gotten a USB3 camera. Could you please share your experiences with me? What board does best with it? Does the XU4 do good?
With my Odroid N2 the maximum I can do is 720p 30fps. With my NanoPi M4 1080p @ 15fps.
I haven't tried my XU4 yet. It's gotten in disuse the last year.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by rosenrot » Sun May 12, 2019 7:02 pm

How instant are your issues? You might have a look at here:

viewtopic.php?f=181&t=34849

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Mon May 13, 2019 1:05 pm

@ BadPritt

In fact, USB 3.0 ports and hubs can interfere with 2.4GHz devices, including wireless keyboards and 2.4G wifi dongles that have occurred and continued many years.
From a white paper titled “USB 3.0* Radio Frequency Interference on 2.4 GHz Devices” written by Intel on the subject.
https://www.intel.com/content/www/us/en ... paper.html

This issue occured at not only ARM device but also desktop or notebook PC.
FYI,
https://www.youtube.com/watch?v=Baqjju0DGmY
https://www.youtube.com/watch?v=wJwxMMX49-Q

I exchanged the USB 3 cable and wireless keyboard dongle on different USB 3 ports last weekend for camera capturing test.
When the USB 3 cable is plugged into the lower left port and the wireless dongle is plugged into the upper right port, it works for more than 40 hours.

XU4 is definitely good enough for USB 3 camera capture and display.
Please see attached topic about XU4 board connected to a USB3 port.
viewtopic.php?f=98&t=24754

But I think Odroid N2 and RK3399 are also a good choice now.
Last edited by hsu95066 on Fri May 17, 2019 6:49 am, edited 1 time in total.
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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Mon May 13, 2019 1:13 pm

@ rosenrot

It is very quickly.
When I plug in the USB 3 camera and the camera's LED turns green to ready, the wireless keyboard and mouse are now unresponsive or lagging.
After unplugging the USB 3 camera, it works fine right now.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Wed May 15, 2019 5:25 pm

When the USB 3 cable is plugged into the lower left port and the wireless dangle is plugged into the upper right port, it works for more than 40 hours.
Mouse movement is a bit lagging on the Mate desktop today, because I rarely use the mouse on the Ubuntu minimum before.

It also has the same issue when I plug in an external USB 3 hard drive.
The wireless dongle and the external USB 3 hard drive are plugged into different USB 3 ports, and the keyboard and mouse do not respond or lag in most cases.

I also tried the same test using the USB 3 camera and the hard drive on the NanoPi-M4 board.
When it was just plugged into the USB 3 camera it didn't respond for a few seconds and then it worked fine.
But, I sometimes notice that the mouse movement is a bit lagging, but not serious.

PS: The NanoPi-M4 is placed in a closed aluminum box.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Thu May 16, 2019 12:50 pm

I did a wifi module test this morning.
The Firefox web browser opens a full HD movie with an average download speed of approximately 1.0 MB/sec.
without USB3 HD.jpg
without USB3 HD.jpg (470.64 KiB) Viewed 1367 times
However, when an external USB 3 hard drive is plugged in, the average download speed is reduced to 400 KB/sec.
The download speed is not very stable, and sometimes it can be as high as 1.0 MB/sec.
with USB3 HD.jpg
with USB3 HD.jpg (409.93 KiB) Viewed 1367 times

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by odroid » Thu May 16, 2019 1:38 pm

Thank you for sharing very interesting and useful test results.
Do you have a WiFi dongle which can support 5Ghz band to confirm the interference?

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Thu May 16, 2019 2:58 pm

Hi @odroid,

I don’t have a dual band WiFi router and a 5G Hz WiFi module right now, I can test it later.
I think that there will be no problems with 5G Hz band.

Wireless keyboards and mice are often used in commercial applications.
Is there a way to fix the issue of wireless keyboard and mouse?

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by odroid » Thu May 16, 2019 3:39 pm

I have no idea indeed. Sorry about that.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Thu May 16, 2019 4:21 pm

Can you reproduce this issue?
The N2's low CPU temperature is ideal for fanless embedded applications.
I want to know this issue is a general case or special case on N2.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by tobetter » Thu May 16, 2019 4:25 pm

https://plugable.com/2017/03/17/trouble ... -stations/

If you are ok to connect USB keyboard and mouse to the front of ODROID-N2, it's worth to attach USB OTG cable with 2.0 hub?
https://www.hardkernel.com/shop/usb2-0-otg-cable/
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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Thu May 16, 2019 4:52 pm

@tobetter

Thanks!
I forgot that the N2 has a micro USB 2.0 OTG and I will test it later.
I think it should be no problem when the wireless dongle is connected to the USB 2 port.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by hsu95066 » Wed May 22, 2019 12:55 am

Hi,

An external USB 3 hard drive plugs into any one of the USB 3 ports, and the keyboard and mouse work fine when the wireless dongle is connected micro USB 2.0 OTG port. :)

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by tobetter » Wed May 22, 2019 1:00 am

hsu95066 wrote:
Wed May 22, 2019 12:55 am
Hi,

An external USB 3 hard drive plugs into any one of the USB 3 ports, and the keyboard and mouse work fine when the wireless dongle is connected micro USB 2.0 OTG port. :)
Thank you for sharing your experience, wish everything goes flawlessly.

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Re: USB 3 port interference with 2.4GHz wireless devices on N2

Unread post by BadPritt » Wed May 22, 2019 2:19 am

@tobetter
Could you make a fixed post about this issue? I've had the same thread a month ago, and since then a few others have been seen.
viewtopic.php?f=181&t=34683&p=253575&hi ... tt#p253575
Always come to the same conclusion. But never looking at the other threads apparently. So if you'd make one fixed thread on top of the issue's this. Then it would be a lot less work for everybody.
Cheers.

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