* Re: Temp range for wndr3700
[not found] <CA+vq8rdoO3jBR890EU05p9bnu2FDSC-+Ycq2oObK8XMum3USMQ@mail.gmail.com>
@ 2011-08-25 21:13 ` Richard Smith
2011-08-25 21:24 ` Rick
0 siblings, 1 reply; 6+ messages in thread
From: Richard Smith @ 2011-08-25 21:13 UTC (permalink / raw)
To: bloat-devel
Resend via the account I'm actually subscribed from...
On Thu, Aug 25, 2011 at 4:13 PM, Richard Smith <smithbone@gmail.com> wrote:
> This is more of a hardware question but the hardware specifications
> for the router don't tell me whats actually known to work.
>
> What temperature range has the wndr3700 been used in while
> testing/operating cerowrt or openwrt? Has anyone tried to use one
> fully loaded at say 50C ambient.
>
> --
> Richard A. Smith
>
--
Richard A. Smith
One Laptop per Child
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Temp range for wndr3700
2011-08-25 21:13 ` Temp range for wndr3700 Richard Smith
@ 2011-08-25 21:24 ` Rick
2011-08-26 19:11 ` Dave Taht
0 siblings, 1 reply; 6+ messages in thread
From: Rick @ 2011-08-25 21:24 UTC (permalink / raw)
To: Richard Smith; +Cc: bloat-devel
I couldn't say anything regarding 50C, but in a warm room, the heat
mine generates is barely noticeable.
On Thu, Aug 25, 2011 at 5:13 PM, Richard Smith <richard@laptop.org> wrote:
> Resend via the account I'm actually subscribed from...
>
> On Thu, Aug 25, 2011 at 4:13 PM, Richard Smith <smithbone@gmail.com> wrote:
>> This is more of a hardware question but the hardware specifications
>> for the router don't tell me whats actually known to work.
>>
>> What temperature range has the wndr3700 been used in while
>> testing/operating cerowrt or openwrt? Has anyone tried to use one
>> fully loaded at say 50C ambient.
>>
>> --
>> Richard A. Smith
>>
>
>
>
> --
> Richard A. Smith
> One Laptop per Child
> _______________________________________________
> Bloat-devel mailing list
> Bloat-devel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat-devel
>
--
They must find it difficult...
Those who have taken authority as the truth,
Rather than truth as the authority.
G. Massey, Egyptologist
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Temp range for wndr3700
2011-08-25 21:24 ` Rick
@ 2011-08-26 19:11 ` Dave Taht
2011-08-26 22:09 ` Jim Gettys
2011-08-29 17:28 ` Richard Smith
0 siblings, 2 replies; 6+ messages in thread
From: Dave Taht @ 2011-08-26 19:11 UTC (permalink / raw)
To: Rick; +Cc: bloat-devel
The nanostation M5 radios were rated to 70C, and use almost the same
chipset as in the WNDR3700.
That said, most consumer gear (e.g the wndr3700s) I've played with
rarely survives for very long at temps higher than 40C, and I have a
long string of failed gear from other manufacturers in Nicaragua to
prove that, where the ambient temp is often well above 36C.
The nanostations were the only thing that survived for a long time in
that environment - (well, they got taken out by rain and lightning)
I will gladly try to come up with some way to bake the wndrs...
On Thu, Aug 25, 2011 at 2:24 PM, Rick <graham.rick@gmail.com> wrote:
> I couldn't say anything regarding 50C, but in a warm room, the heat
> mine generates is barely noticeable.
>
> On Thu, Aug 25, 2011 at 5:13 PM, Richard Smith <richard@laptop.org> wrote:
>> Resend via the account I'm actually subscribed from...
>>
>> On Thu, Aug 25, 2011 at 4:13 PM, Richard Smith <smithbone@gmail.com> wrote:
>>> This is more of a hardware question but the hardware specifications
>>> for the router don't tell me whats actually known to work.
>>>
>>> What temperature range has the wndr3700 been used in while
>>> testing/operating cerowrt or openwrt? Has anyone tried to use one
>>> fully loaded at say 50C ambient.
>>>
>>> --
>>> Richard A. Smith
>>>
>>
>>
>>
>> --
>> Richard A. Smith
>> One Laptop per Child
>> _______________________________________________
>> Bloat-devel mailing list
>> Bloat-devel@lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/bloat-devel
>>
>
>
>
> --
> They must find it difficult...
> Those who have taken authority as the truth,
> Rather than truth as the authority.
> G. Massey, Egyptologist
> _______________________________________________
> Bloat-devel mailing list
> Bloat-devel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat-devel
>
--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Temp range for wndr3700
2011-08-26 19:11 ` Dave Taht
@ 2011-08-26 22:09 ` Jim Gettys
2011-08-31 17:27 ` Richard Smith
2011-08-29 17:28 ` Richard Smith
1 sibling, 1 reply; 6+ messages in thread
From: Jim Gettys @ 2011-08-26 22:09 UTC (permalink / raw)
To: Dave Taht; +Cc: bloat-devel
Remember: you were near the ocean in high humidity in Nicaragua; failing due to warm, humid salt air is always a headache.... Temperature by itself is far from the whole story.
Maybe sminthbone can throw a few in olpc's environmental chamber as a quick test....
Jim
On Aug 26, 2011, at 3:11 PM, Dave Taht <dave.taht@gmail.com> wrote:
> The nanostation M5 radios were rated to 70C, and use almost the same
> chipset as in the WNDR3700.
>
> That said, most consumer gear (e.g the wndr3700s) I've played with
> rarely survives for very long at temps higher than 40C, and I have a
> long string of failed gear from other manufacturers in Nicaragua to
> prove that, where the ambient temp is often well above 36C.
>
> The nanostations were the only thing that survived for a long time in
> that environment - (well, they got taken out by rain and lightning)
>
> I will gladly try to come up with some way to bake the wndrs...
>
> On Thu, Aug 25, 2011 at 2:24 PM, Rick <graham.rick@gmail.com> wrote:
>> I couldn't say anything regarding 50C, but in a warm room, the heat
>> mine generates is barely noticeable.
>>
>> On Thu, Aug 25, 2011 at 5:13 PM, Richard Smith <richard@laptop.org> wrote:
>>> Resend via the account I'm actually subscribed from...
>>>
>>> On Thu, Aug 25, 2011 at 4:13 PM, Richard Smith <smithbone@gmail.com> wrote:
>>>> This is more of a hardware question but the hardware specifications
>>>> for the router don't tell me whats actually known to work.
>>>>
>>>> What temperature range has the wndr3700 been used in while
>>>> testing/operating cerowrt or openwrt? Has anyone tried to use one
>>>> fully loaded at say 50C ambient.
>>>>
>>>> --
>>>> Richard A. Smith
>>>>
>>>
>>>
>>>
>>> --
>>> Richard A. Smith
>>> One Laptop per Child
>>> _______________________________________________
>>> Bloat-devel mailing list
>>> Bloat-devel@lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/bloat-devel
>>>
>>
>>
>>
>> --
>> They must find it difficult...
>> Those who have taken authority as the truth,
>> Rather than truth as the authority.
>> G. Massey, Egyptologist
>> _______________________________________________
>> Bloat-devel mailing list
>> Bloat-devel@lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/bloat-devel
>>
>
>
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://the-edge.blogspot.com
> _______________________________________________
> Bloat-devel mailing list
> Bloat-devel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat-devel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Temp range for wndr3700
2011-08-26 19:11 ` Dave Taht
2011-08-26 22:09 ` Jim Gettys
@ 2011-08-29 17:28 ` Richard Smith
1 sibling, 0 replies; 6+ messages in thread
From: Richard Smith @ 2011-08-29 17:28 UTC (permalink / raw)
To: Dave Taht; +Cc: bloat-devel
On Fri, Aug 26, 2011 at 3:11 PM, Dave Taht <dave.taht@gmail.com> wrote:
> The nanostation M5 radios were rated to 70C, and use almost the same
> chipset as in the WNDR3700.
>
> That said, most consumer gear (e.g the wndr3700s) I've played with
> rarely survives for very long at temps higher than 40C, and I have a
> long string of failed gear from other manufacturers in Nicaragua to
> prove that, where the ambient temp is often well above 36C.
>
> The nanostations were the only thing that survived for a long time in
> that environment - (well, they got taken out by rain and lightning)
Thanks. I'll add those to my list of hardware to suggest to people to
lookat. I think we may have a site in Jamaica that is using
nanostations.
> I will gladly try to come up with some way to bake the wndrs...
I ask because I'd like to start recommending the wndr (or perhaps
another cerowrt compatible device) to OLPC folk in response to
questions about whats good choice for an AP. The big deployments seem
to have their own methods of choosing and testing but lots of the
smaller sites (say like with 500 or 1000 XO's) spread out over several
sites don't have the ability to do good long term environmental
testing prior to deployment. We spec the XO to operate fine up to
50C so I wanted to try and find a AP that would match. (even if its
official ratings are not that high).
Ambient at 35C is pretty common for mid-day in the summers for places
that don't have any sort of air conditioning (which is 95% of them) so
if the AP is closed up in a room or stuck up in some sort of attic it
will easily reach >40C.
The test would need more than just a short term baking. Although some
sort of test in 50C ambient running heavily loaded and looking at the
rise inside the case would be a good start.
--
Richard A. Smith
One Laptop per Child
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Temp range for wndr3700
2011-08-26 22:09 ` Jim Gettys
@ 2011-08-31 17:27 ` Richard Smith
0 siblings, 0 replies; 6+ messages in thread
From: Richard Smith @ 2011-08-31 17:27 UTC (permalink / raw)
To: bloat-devel
On Fri, Aug 26, 2011 at 6:09 PM, Jim Gettys <gettysjim@gmail.com> wrote:
> Remember: you were near the ocean in high humidity in Nicaragua; failing due to warm, humid salt air is always a headache.... Temperature by itself is far from the whole story.
And Haiti, and Jamaica.
> Maybe sminthbone can throw a few in olpc's environmental chamber as a quick test....
We can run them hot but we don't have humidity and salty. You can add
water into the tray at the bottom to make it humid but there's no
control.
I know that corrosion is a possible problem but unless the boards are
conformal coated all of them will be subject to corrosion. That's
certainly a concern but a much longer term concern.
--
Richard A. Smith
One Laptop per Child
^ permalink raw reply [flat|nested] 6+ messages in thread
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[not found] <CA+vq8rdoO3jBR890EU05p9bnu2FDSC-+Ycq2oObK8XMum3USMQ@mail.gmail.com>
2011-08-25 21:13 ` Temp range for wndr3700 Richard Smith
2011-08-25 21:24 ` Rick
2011-08-26 19:11 ` Dave Taht
2011-08-26 22:09 ` Jim Gettys
2011-08-31 17:27 ` Richard Smith
2011-08-29 17:28 ` Richard Smith
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