This suggests that live logging was still running in the background.
Only one program at a time can access the weather station USB device.
> The only thing that helped was to remove batteries from the station.
> It now reads again for a hour or so, but the data since the hang were
> lost.
This sounds like the problem I have with one of my weather stations.
(Some users of Cumulus (another weather station software) have reported
the same problem.) I've yet to discover a cure - the intermittent nature
of the problem makes it very hard to test any changes. Sometimes it
happens just two days after resetting the base station, sometimes after
3 weeks. Another symptom is that the console 'memory' function no longer
works - it bleeps but won't show any past data.
I'm now running Hourly.py instead (hourly cron job) as that will mean
less USB activity, which I hope will be more reliable.
> In the first instance, it looks like a problem with the station
> hardware / firmware.
> But can it also blamed to a compatibility issue with software?
> That pywws somehow screws up the interface?
My old station didn't show the problem in over 3 years use with pywws,
so I think there has been a firmware change in the weather stations. But
I can't prove that.
--
Jim Easterbrook <http://www.jim-easterbrook.me.uk/>
As far as I know they (those that use 'EasyWeather' software) are all
made by the same company: http://www.foshk.com/Weather_Professional/
> Any idea on the inner schematics?
No. I've dismantled mine and it looks like those shown here:
http://sandaysoft.com/forum/viewtopic.php?f=13&t=640
>> I've yet to discover a cure - the intermittent nature
>> of the problem makes it very hard to test any changes. Sometimes it
>> happens just two days after resetting the base station, sometimes after
>> 3 weeks.
>
> So there are little chances for reliable use?
> Do you know of reports whether this problems also occurs on the
> original windows setup?
I don't know, but I think it would. Very few people would run the
Windows / EasyWeather setup continuously though, so they may not have
found the problem. I've use a USB snooper program to check how
EasyWeather works, and pywws is doing exactly the commands. It's
possible that pywws is reading data too often, or by chance it's reading
data at the wrong time and upsetting the weather station somehow.
> Hm. Intermittend error smells like power, thermal or EMC issue.
Or timing?
> I just discovered a external power jack on the station, asking for 6V
> (sic!).
> It's now running on AC. Let's watch and hope...
If it is a power problem then we have an easy solution.
>> I'm now running Hourly.py instead (hourly cron job) as that will mean
>> less USB activity, which I hope will be more reliable.
>
> Is this proven to help? Or still in trial stage?
I've only been doing it for about a week so far, so cannot say.
> Did the old station run on 2 Batteries, too? Or on AC, or higher
> voltage?
In both cases I'm running on internal batteries / USB power. The
stations have a relay that should switch over to USB power when it's
available.
AC power did not help as expected when still reading in 5 min interval:
station was dead after some days again, when memory indicator was at about
70 %
After repower, I did not set the shorter data collection interval but left it
at the standard 30 min. Still reading data with pywws-11.10_r429/LiveLog.py
Some days ago memory indicator reached 100 % und runs as cyclic buffer now (I
suppose), but reading is still alive.
Barometric pressure is gone, but this may have happened when I tried to power
by AC only, w/o batteries .
Don't want to fix this now, prefer to countiously let it run as long as
possible.
Outdoor sensor connection was gone for some hours, maybe due to worsended
conditions from snow and cold, but is back again.
Of course, this may just be good luck.
I'll keep you informed.
gnx
Wolfgang Rosner
wro...@tirnet.de
http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=IBAYERNM13
WH2080 conrad branded, I think it is the same like
http://www.foshk.com/Weather_Professional/WH2080.htm
openwert ATTITUDE ADJUSTMENT (bleeding edge, r29631)
on TP-Link MR3220