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504b6b3a
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On 04/12/2025 14:43, Theo wrote:
> The Natural Philosopher <
tnp@invalid.invalid> wrote:
>> On 04/12/2025 07:52, David Taylor wrote:
>>> On 03/12/2025 20:28, The Natural Philosopher wrote:
>>>> Anyone have any anecdotal or other wise informatin on pi PICO W and
>>>> other pis with wifi being more, or less able to connect with temperature.
>>>> I took mine outside and it connected and reported its indoor
>>>> temperature, but hasn`t reported since. Wifi is on the bleeding edge
>>>> (-94dBm)
>>>
>>> I`ve found that Wi-Fi on the Pico W to be dependent on its supply
>>> voltage. Two A cells isn`t enough.
>>>
>> I have *three* AAs ! The ultrasonics need nearer 5V.
>>
>> It worked fine on my desk here but the signal strength was around -87dBn ..
>>
>> Now it`s outside on the far side of a garage I seem to have lost about 6dB.
>
> Do the AAs suffer when the temperature drops? I recall stories of arctic
> explorers having to keep camera/etc batteries close to their skin so they
> don`t freeze and stop working.
> ]
Well yes, but not enough to matter in this case
> Maybe it`s marginal but usable inside and the temperature drop is enough to
> tip it over the edge. Does it work better on a warm day than a cold night?
>
That was what I thought, but the reality is a bit different
see
http://vps.templar.co.uk/Odds%20and%20Ends/POilSesnor.png
The unit measures battery voltage and temperature as well as the
received Wifi signal strength. In addition to oil level
[ I deliberately anticipated issues with any one of these]
As you can see the one parameter that is shit, is the signal strength
I posted the query before this one sample got through last night.
And proved that the unit was in fact operating, just unable to get
through 99% of the time
So it is on the ragged edge. And probably amenable to having an RF
mirror stuck behind it.
Which I will experiment with, Currently the access pint has a stainless
steel tray wedged behind it, but it doesn`t seem to have improved much.
Its cold and wet and I am not bothering to go outside and play with the
external installation today.
:-(
--
?But what a weak barrier is truth when it stands in the way of an
hypothesis!?
Mary Wollstonecraft
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