gumstix

There is a way to pu the wifi in a power managed mode by adding a line
to /etc/network/interfaces  It keeps the wifi cool as long as it isn't
hung not connected to an access point. I wish I could remember off the
top of my head.

On 9/27/08, Nils <nils.schlupp@...> wrote:
> Hey,
> My netwifiusd seems so be overheating a lot. the wifi gets very hot. I am
> considering adding a small fan ontop of it, somehow, but i dont know where
> to get a super small fan, and how to get it on there. anyone else hae had
> any issues with this, and found a good solution???
>

-- 
Sent from my mobile device

As I recall, I found this here somewhere and it seems to work well.
Put into /etc/network/interfaces

Iwconfig wlan0 power on

This seems to put the module into power management mode and then it runs
much cooler.


-----Original Message-----
From: Stephen Farnsworth [mailto:robotoman@...] 
Sent: Saturday, September 27, 2008 5:39 PM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] wifi overheating

There is a way to pu the wifi in a power managed mode by adding a line
to /etc/network/interfaces  It keeps the wifi cool as long as it isn't
hung not connected to an access point. I wish I could remember off the
top of my head.

On 9/27/08, Nils <nils.schlupp@...> wrote:
> Hey,
> My netwifiusd seems so be overheating a lot. the wifi gets very hot. I am
> considering adding a small fan ontop of it, somehow, but i dont know where
> to get a super small fan, and how to get it on there. anyone else hae had
> any issues with this, and found a good solution???
>

-- 
Sent from my mobile device

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i have the problem, but with the line iwconfig wlan0 power on, the interface
don't up and i have an error 

"Error for wireless request "Set Power Management" (8B2C) : set failed on
device wlan0; Invalid argument'

please help me this problem stop my projetct?

and the help to iwconfig power is 

"interface power {period N | timeout N | saving N | off}

 information : wifi mode ad-hoc and key wep


Robert Farrell wrote:
> 
> As I recall, I found this here somewhere and it seems to work well.
> Put into /etc/network/interfaces
> 
> Iwconfig wlan0 power on
> 
> This seems to put the module into power management mode and then it runs
> much cooler.
> 
> 
> -----Original Message-----
> From: Stephen Farnsworth [mailto:robotoman@...] 
> Sent: Saturday, September 27, 2008 5:39 PM
> To: General mailing list for gumstix users.
> Subject: Re: [Gumstix-users] wifi overheating
> 
> There is a way to pu the wifi in a power managed mode by adding a line
> to /etc/network/interfaces  It keeps the wifi cool as long as it isn't
> hung not connected to an access point. I wish I could remember off the
> top of my head.
> 
> On 9/27/08, Nils <nils.schlupp@...> wrote:
>> Hey,
>> My netwifiusd seems so be overheating a lot. the wifi gets very hot. I am
>> considering adding a small fan ontop of it, somehow, but i dont know
>> where
>> to get a super small fan, and how to get it on there. anyone else hae had
>> any issues with this, and found a good solution???
>>
> 
> -- 
> Sent from my mobile device
> 
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the
> world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> gumstix-users mailing list
> gumstix-users@...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
> 
> 
> -------------------------------------------------------------------------
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> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
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> Grand prize is a trip for two to an Open Source event anywhere in the
> world
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> _______________________________________________
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> https://lists.sourceforge.net/lists/listinfo/gumstix-users
> 
> 

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View this message in context: http://www.nabble.com/wifi-overheating-tp19705980p21582954.html
Sent from the Gumstix mailing list archive at Nabble.com.

2009/1/26 Malde <gstixlist@...>:
> It's pretty hard to establish a stable connection even when
> the gumstix are close to each other (about 2 oder 3 m)

Is it real ? I haven't tried, because i have only one netwifimicrosd,
but i have a job where i have to install cca. 20-25 gumstix and do
some communication between them. It will be a chain, so i have to do
it in ad-hoc mode and the information will go through the chain from
the first to the last gumstix. The distance is approx. 30-50m between
2 neighbor.

I have a number of Gumstix units consisting of the Console LCD16, XL6P and a net wifi microSD-EU and find that on a desk with a 5V supply the power supply runs at around 80 degrees celcius. We have found that the gumstix seem to be unreliable with the microprocessor dying, typically the power supply unit, and the first place of interest is the excessive temperature.
The wifi module also gets hot and is a concern, but not as much.

On this issue I have some questions>>

What is a safe temperature for a gumstix? 
What temperatures have they been tested at?

To me it seems that the switch mode power supply on these boards has been under rated and run way too hot.
Has anyone tried making a cooler running Power supply for these boards? Or fixing the existing power supply?
Also considering that at 80 degrees celsius + the inductor is probably not working correctly?

Is there any way to read the core temperature?
Does it have temperature shutdown? What temp.

Regards
Paul

Unfortunately yes, would be perfect if you would manage to set up this
communication chain, because that's the same thing I'tried and if it would
work with your gumstix, I could be sure the problem is something different
from the gumstix itself. maybe interferences or whatever. But right now I'm
quiet desperate because I've no clou on how to solve this. So please tell me
! :)


Jozsef Lenart wrote:
> 
> 
> Is it real ? I haven't tried, because i have only one netwifimicrosd,
> but i have a job where i have to install cca. 20-25 gumstix and do
> some communication between them. It will be a chain, so i have to do
> it in ad-hoc mode and the information will go through the chain from
> the first to the last gumstix. The distance is approx. 30-50m between
> 2 neighbor.
> 
> 

-- 
View this message in context: http://www.nabble.com/wifi-overheating-tp19705980p21705364.html
Sent from the Gumstix mailing list archive at Nabble.com.

We have experienced very hot wifi modules also however nothing has  
failed thus far.  Our setup currently consists of a Verdex XL6P with  
a wifistix.  After 20 minutes of running the wifi module to too hot  
to touch.

Comparing current draw with and without the wireless module we  
observe differences of 220mA.  Is there possibly a way to scale back  
the power consumption of the board (sacrificing performance possibly)?

Brett

--------------------------------------------------
Brett Hemes
UMN Center for Distributed Robotics
hemes@...
hemes001@...




On Jan 27, 2009, at 12:44 AM, Paul.Flick@... wrote:

> I have a number of Gumstix units consisting of the Console LCD16,  
> XL6P and a net wifi microSD-EU and find that on a desk with a 5V  
> supply the power supply runs at around 80 degrees celcius. We have  
> found that the gumstix seem to be unreliable with the  
> microprocessor dying, typically the power supply unit, and the  
> first place of interest is the excessive temperature.
> The wifi module also gets hot and is a concern, but not as much.
>
> On this issue I have some questions>>
>
> What is a safe temperature for a gumstix?
> What temperatures have they been tested at?
>
> To me it seems that the switch mode power supply on these boards  
> has been under rated and run way too hot.
> Has anyone tried making a cooler running Power supply for these  
> boards? Or fixing the existing power supply?
> Also considering that at 80 degrees celsius + the inductor is  
> probably not working correctly?
>
> Is there any way to read the core temperature?
> Does it have temperature shutdown? What temp.
>
> Regards
> Paul
>
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