dsyleixa
Posts: 19
Joined: Mon Apr 24, 2017 8:20 am

disable unknow port

Wed Jul 12, 2017 10:42 am

Hello guys,

I would like to disable one port on my RaspberryPi 3 model B, meaning shut the current given to it. But I don't know the name of it. May someone could help me to find a solution?
That's the port in the red circle on the picture link below..

http://www.hapshack.com/?v=LmNE2.png

thanks,
dsyleixa

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 17777
Joined: Sat Jul 30, 2011 7:41 pm

Re: disable unknow port

Wed Jul 12, 2017 12:17 pm

That's the DSI port, it won't have any current flowing unless you have something plugged in to it. So its effectively disabled automatically.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Please direct all questions to the forum, I do not do support via PM.

dsyleixa
Posts: 19
Joined: Mon Apr 24, 2017 8:20 am

Re: disable unknow port

Wed Jul 12, 2017 12:25 pm

Hey,

But, If I use an antenna connected to an oscilloscope I've some emnassion electromagnetics which come from it :/
i'm pretty sure that my emission electromagnetic doesn't come from my processor..

Thanks
dsyleixa

DirkS
Posts: 7420
Joined: Tue Jun 19, 2012 9:46 pm
Location: Essex, UK

Re: disable unknow port

Wed Jul 12, 2017 12:35 pm

dsyleixa wrote:Hey,

But, If I use an antenna connected to an oscilloscope I've some emnassion electromagnetics which come from it :/
i'm pretty sure that my emission electromagnetic doesn't come from my processor..

Thanks
dsyleixa
Could it come from the wifi antenna (that's the white rectangular thing just above the DSI connector in your image)

dsyleixa
Posts: 19
Joined: Mon Apr 24, 2017 8:20 am

Re: disable unknow port

Fri Jul 14, 2017 9:03 am

Hey again,
Currently no solution but the wifi is now disable and there are no electromagnetic emanation from it. I really think that the EM come from DSI port. I checked the signal near the power consumption plug and it's not the same signal.. annoying ..

thanks
dsyleixa

User avatar
rpdom
Posts: 11426
Joined: Sun May 06, 2012 5:17 am
Location: Essex, UK

Re: disable unknow port

Fri Jul 14, 2017 8:40 pm

Did you shut down the Bluetooth as well? That uses the same chip as the WiFi.

dsyleixa
Posts: 19
Joined: Mon Apr 24, 2017 8:20 am

Re: disable unknow port

Mon Jul 17, 2017 9:06 am

Hey,

Yes, I wrote

Code: Select all

pi3-disable-wifi
pi3-disable-bt
in the /boot/config.txt , before my post.
It's a noisy signal without apparent information.

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