DWL-900AP+ External Mounting Environmentals ;-((

Tim Kerby tkerby at tkerby.f9.co.uk
Sun Dec 29 02:32:05 EST 2002

Just had a thought, two pairs are used for network traffic, one pair (or
sometimes two) for power.  If there is only power on one set of pairs, the
other two pairs could be used for a 1 wire network and a number of ibuttons
or other temperature sensors.  Have a look at ibutton.com for some more


----- Original Message -----
From: "Lyle Williams" <lyle.williams at bigpond.com>
To: "Grahame Kelly" <grahame at wildpossum.com>; "Wireless List"
<wireless at lists.samba.org>
Sent: Friday, December 27, 2002 4:19 AM
Subject: Re: DWL-900AP+ External Mounting Environmentals ;-((

> Grahame,
> Thanks for feedback on your experiences. (Un)fortunately it's raining here
> right now, so everything is working perfectly.  I'll jamb a thermocouple
> into the box when we get a sunny day - that should give me an idea of
> temps.  The original 900AP+ box is gone, I am just using the internal
> in a commercial electrical enclosure.  Hopefully I won't have to fit
> airconditioning!   :^)
> I'll send my experiences to the list.
> On the subject of laser cutting, I don't think that level of precision is
> needed, especially if you don't care where your secondary lobes are in the
> vertical plane.  I'm just using a router to cut slots.  Things seem to
> (so far...)
> Lyle Williams
> 27DEC02
> ----- Original Message -----
> From: "Grahame Kelly" <grahame at wildpossum.com>
> To: "Wireless List" <wireless at lists.samba.org>
> Sent: Friday, December 27, 2002 1:30 PM
> Subject: DWL-900AP+ External Mounting Environmentals ;-((
> Hi everyone.
> I am new to the list but have been lurking for sometime.
> Last week I mounted my DWL-900AP+ systems in vented containers with an
> additional metal skin to deflect as much heat away as possible. I had some
> experience in going the same environmental casing for a 24/7 operating IR
> Camera / Controller system for my wildpossumCAM (Linux of course).
> Initial tests worked well - until the sun came over the house(s) and while
> not
> directly in sunlight, the tempature raised to 32C internally caused the
> units
> to both fail within 2 mins. According the DLINK spec they are suppose to
> tolerate operations -10C to +55C: Well this is totally untrue according to
> my
> experience - I hope your more successfull. My measurements show the units
> off or intermittent at +30C external - allowing for a 5C to 10C internal
> onboard difference its operating temp is only 35C to 40C MAX. This was
> tested
> on four units. All showed the same effect.
> Interestingly usually the AP's lose ethernet connectivity first, then
> sometime
> later RF conectivity. Bummer! Bummer!
> So, now I am building a "Peiter Unit with integrated AVR uP + tempature
> sensing" for the beasts; hopefully this will give total year long
> operations.
> Love the slotted antenna buy the way Lyne. May build a couple myself but I
> don't have access to laser cutting company, pity they couldn't do a couple
> of
> runs for others too.
> Cheers.
> Grahame
> ex. VK2ZGK  Glenhaven; Sydney.
> grahame (at) wildpossum (dot) com

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