Subj : Re: P Pico W and temperature... To : All From : The Natural Philosopher Date : Thu Dec 04 2025 15:02:36 On 04/12/2025 14:43, Theo wrote: > The Natural Philosopher 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.ÿ 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 --- PyGate Linux v1.5.1 * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10) .