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 iams...@gmail.com <iamst...@gmail.com> 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 tke...@gmail.com 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 iams...@gmail.com <iams...@gmail.com> >> 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 weewx-user+...@googlegroups.com. >>> 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 weewx-user+unsubscr...@googlegroups.com. > 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 weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAPq0zEAVVWPO5NdZJ6fhfaQpXxPxf7zTRv7ndQxYTFE5NE8dMw%40mail.gmail.com.
