Would also look at adding a DS1307 or DS3231 RTC Module to RPI zero. This should maintain the time when the RPI zero loses power.
On Friday, January 6, 2023 at 7:59:16 AM UTC-5 [email protected] wrote: > If weewx causes the corruption, I sure don't see how. It operates well > within the published API provided by Davis. > > Graham is probably right: a power spike from when power comes on is likely > the problem. It's coming through either the VP2 power supply or, more > likely, the Pi's. > > Try at least a surge suppressor. A UPS would be even better. > > On Thu, Jan 5, 2023 at 5:46 PM [email protected] <[email protected]> > wrote: > >> "What happens if you 'pull the plug' on your VP2? Does it keep running? >> Perhaps the batteries are bad? >> >> Yes, it keeps running, that is why it seems to be a weewx issue to me. In >> other words, if the Pi Zero running weewx were not connected to the VP2, >> the data logger memory would not get corrupted. In fact, weewx is able to >> recover data that was gathered during the power outage (while the Pi is >> shut down). It is only when power is *restored *that the data logger >> corruption happens. At least I assume that is really the root of the issue, >> I really don't know. All I know is that almost every time the power goes >> out, I get the record time error and all data recording and uploading stops. >> >> I've looked into getting a UPS for the Pi, which really appears to be >> nothing more than a $15 ext phone battery, but it seems to me this is a >> weewx problem that should be addressed. Alternately, I can contact Davis to >> see what they say. >> " >> >> On Thursday, January 5, 2023 at 3:34:40 PM UTC-8 [email protected] wrote: >> >>> It should work. >>> >>> What happens if you 'pull the plug' on your VP2? Does it keep running? >>> Perhaps the batteries are bad? >>> >>> Personally, I use a UPS for both the weewx server and the VP2 and >>> haven't had a memory corruption problem in at least a decade. So, you could >>> try that. >>> >>> >>> >>> >>> On Thu, Jan 5, 2023 at 11:30 AM [email protected] <[email protected]> >>> wrote: >>> >>>> I've been using weewx running on a Pi Zero with no other tasks. >>>> Unfortunately, I live in a area that suffers power losses, often during a >>>> weather events, so I lose that data. What typically happens is that when >>>> the power comes back on, I get the dreaded "..page timestamp... less than >>>> final timestamp..." error. The only way I have been able to address it is >>>> to use the memory dump and clear. >>>> >>>> I don't understand why this happens since the VP2 is running with >>>> battery backup, yet the memory on the datalogger gets corrupted. Is this >>>> an >>>> issue with weewx that could be addressed? >>>> >>>> Failing that, can I address this issue by adding a backup supply to my >>>> Pi Zero? >>>> >>>> Thanks! >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "weewx-user" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/weewx-user/c833a23b-2957-4311-882a-cda796d0c928n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/weewx-user/c833a23b-2957-4311-882a-cda796d0c928n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-user" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/7bd3876d-96a1-4c3a-82fb-c4f406234066n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-user/7bd3876d-96a1-4c3a-82fb-c4f406234066n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/a9235658-a6dc-4ebd-b9ba-154cb1d5e8b7n%40googlegroups.com.
