What we could do is calculate the number of expected records, then decrement as each one is processed. If the counter is non-zero after exiting the loop then the memory must be corrupt.
In theory this should work, but I'll have to think through if it could generate false positives. -tk On Sun, Aug 2, 2026 at 8:28 PM John Smith <[email protected]> wrote: > This comes up so often and I never can figure out what you're looking at > > > There is usually some common things like the pages thing Tom pointed out > and I think it mostly happens when there is an issue with power to the > console, or at least that's when it happened to me a few years ago, after > that I put my console on a UPS and it hasn't re-occurred. > > Is it possible (or reasonable) to log something showing it walking through >> the pages ? > > > +1 and as an added bonus it may reduce emails to the list if it people > could follow a link for self help, instead of cryptic exceptions that are > meaningless to non-programmers > > On Mon, 3 Aug 2026 at 09:19, Vince Skahan <[email protected]> wrote: > >> Tom can you describe what does a 'normal' not-corrupted setup look like ? >> This comes up so often and I never can figure out what you're looking at >> and how to quantify abnormal vs. normal. >> >> Is it possible (or reasonable) to log something showing it walking >> through the pages ? >> >> On Sunday, August 2, 2026 at 3:40:49 PM UTC-7 Tom Keffer wrote: >> >>> These are classical symptoms of corrupt memory in the logger. The >>> giveaway is the log entry that says there are 9 pages to be retrieved, but >>> the first page already shows descending timestamps. >>> >>> To fix, see the section *Corrupt memory >>> <https://github.com/weewx/weewx/wiki/Troubleshooting-the-Davis-Vantage-station#corrupt-station-memory>* >>> in >>> the wiki. >>> >>> On Sun, Aug 2, 2026 at 1:21 PM 'Andy Thompson' via weewx-user < >>> [email protected]> wrote: >>> >>>> I am currently getting a vantage driver error in Weewx that is stopping >>>> the show. I have a Vantage Pro 2, running a rasberri pi 3. Brand new >>>> install of Weewx. >>>> andyt1424@ThompsonFarms:~ $ cd /etc/weewx >>>> andyt1424@ThompsonFarms:/etc/weewx $ sudo nano weewx.conf >>>> andyt1424@ThompsonFarms:/etc/weewx $ sudo systemctl stop weewx >>>> andyt1424@ThompsonFarms:/etc/weewx $ sudo journalctl -u weewx -f >>>> Aug 02 14:51:20 ThompsonFarms weewxd[663]: INFO weewx.manager: Daily >>>> summaries up to date >>>> Aug 02 14:51:22 ThompsonFarms weewxd[663]: INFO weewx.engine: Starting >>>> main packet loop. >>>> Aug 02 14:51:34 ThompsonFarms weewxd[663]: ERROR weewx.drivers.vantage: >>>> LOOP batch try #1; error: Expected to read 99 chars; got 0 instead >>>> Aug 02 14:58:54 ThompsonFarms systemd[1]: Stopping weewx.service - >>>> WeeWX... >>>> Aug 02 14:58:54 ThompsonFarms weewxd[663]: INFO __main__: Received >>>> signal TERM (15). >>>> Aug 02 14:58:54 ThompsonFarms weewxd[663]: INFO weewx.engine: Main loop >>>> exiting. Shutting engine down. >>>> Aug 02 14:58:55 ThompsonFarms weewxd[663]: INFO __main__: Terminating >>>> weewx version 5.4.0 >>>> Aug 02 14:58:55 ThompsonFarms systemd[1]: weewx.service: Deactivated >>>> successfully. >>>> Aug 02 14:58:55 ThompsonFarms systemd[1]: Stopped weewx.service - WeeWX. >>>> Aug 02 14:58:55 ThompsonFarms systemd[1]: weewx.service: Consumed >>>> 4.827s CPU time. >>>> Aug 02 15:01:40 ThompsonFarms systemd[1]: Started weewx.service - WeeWX. >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Initializing >>>> weewxd version 5.4.0 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Command >>>> line: /usr/share/weewx/weewxd.py /etc/weewx/weewx.conf >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Using >>>> Python: 3.11.2 (main, May 12 2026, 05:17:27) [GCC 12.2.0] >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Located at: >>>> /usr/bin/python3 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Platform: >>>> Linux-6.12.96+rpt-rpi-v7-armv7l-with-glibc2.36 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Locale: >>>> 'en_US' >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Entry path: >>>> /usr/share/weewx/weewxd.py >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: WEEWX_ROOT: >>>> /etc/weewx >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Config file: >>>> /etc/weewx/weewx.conf >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: User module: >>>> /etc/weewx/bin/user >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Debug: >>>> 1 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: User: >>>> weewx >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Group: >>>> weewx >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO __main__: Groups: >>>> dialout weewx >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG __main__: >>>> loop_on_init: False >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG __main__: >>>> Initializing engine >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.engine: Loading >>>> station type Vantage (weewx.drivers.vantage) >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Driver version is 3.6.3 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Option loop_request=1 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Opened up serial port /dev/ttyUSB0; baud 19200; >>>> timeout 4.00 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Hardware type is 16 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: ISS ID is 1 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Hardware name: Vantage Pro2 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdTimeSynch >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdTimeSynch >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdConvert >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.engine: >>>> StdConvert target unit is 0x1 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdConvert >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdCalibrate >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdCalibrate >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdQC >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdQC >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.wxservices.StdWXCalculate >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.wxservices: >>>> StdWXCalculate will use data binding wx_binding >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.manager: Daily >>>> summary version is 4.0 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.wxservices.StdWXCalculate >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.wxxtypes.StdWXXTypes >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.wxxtypes.StdWXXTypes >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.wxxtypes.StdPressureCooker >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.wxxtypes.StdPressureCooker >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.wxxtypes.StdRainRater >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.wxxtypes.StdRainRater >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.wxxtypes.StdDelta >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.wxxtypes.StdDelta >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdArchive >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.engine: Archive >>>> will use data binding wx_binding >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.engine: Record >>>> generation will be attempted in 'hardware' >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.engine: The >>>> archive interval in the configuration file (300) does not match the station >>>> hardware interval (1800). >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: INFO weewx.engine: Using >>>> archive interval of 1800 seconds (specified by hardware) >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Use >>>> LOOP data in hi/low calculations: 1 >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdArchive >>>> Aug 02 15:01:41 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdStationRegistry >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: >>>> StationRegistry: Registration not requested. >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdStationRegistry >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdWunderground >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.restx: WU >>>> essentials: {} >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: >>>> Wunderground-PWS: Data for station KMNHANSK2 will be posted >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdWunderground >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdPWSweather >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: >>>> PWSWeather: Data for station KMNHANSK2 will be posted >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdPWSweather >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdCWOP >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: CWOP: >>>> Data for station DW7572 will be posted >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdCWOP >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdWOW >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: WOW: >>>> Posting not enabled. >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdWOW >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdWOWBE >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: WOW-BE: >>>> Posting not enabled. >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdWOWBE >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.restx.StdAWEKAS >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.restx: AWEKAS: >>>> Posting not enabled. >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.restx.StdAWEKAS >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdPrint >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdPrint >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: Loading >>>> service weewx.engine.StdReport >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.engine: >>>> 'pyephem' detected, extended almanac data is available >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.engine: >>>> Finished loading service weewx.engine.StdReport >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO __main__: Starting up >>>> weewx version 5.4.0 >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.manager: Daily >>>> summary version is 4.0 >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.manager: Daily >>>> summary version is 4.0 >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG weewx.manager: Daily >>>> summary version is 4.0 >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:01:42 ThompsonFarms weewxd[1952]: INFO weewx.engine: Clock >>>> error is -10.74 seconds (positive is fast) >>>> Aug 02 15:01:43 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:01:43 ThompsonFarms weewxd[1952]: INFO weewx.drivers.vantage: >>>> Clock set to 2026-08-02 15:01:44 CDT (1785700904) >>>> Aug 02 15:01:43 ThompsonFarms weewxd[1952]: INFO weewx.engine: Using >>>> binding 'wx_binding' to database 'weewx.sdb' >>>> Aug 02 15:01:43 ThompsonFarms weewxd[1952]: INFO weewx.manager: >>>> Starting backfill of daily summaries >>>> Aug 02 15:01:43 ThompsonFarms weewxd[1952]: INFO weewx.manager: Daily >>>> summaries up to date >>>> Aug 02 15:01:43 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Getting archive packets since 2026-08-01 18:30:00 >>>> CDT (1785627000) >>>> Aug 02 15:01:44 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:01:44 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Retrieving 9 page(s); starting index= 3 >>>> Aug 02 15:01:44 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: DMPAFT complete: page timestamp 2024-09-29 18:30:00 >>>> CDT (1727652600) less than final timestamp 2026-08-01 18:30:00 CDT >>>> (1785627000) >>>> Aug 02 15:01:44 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Catch up complete. >>>> Aug 02 15:01:44 ThompsonFarms weewxd[1952]: INFO weewx.engine: Starting >>>> main packet loop. >>>> Aug 02 15:01:45 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:01:45 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Requesting 200 LOOP packets. >>>> Aug 02 15:01:45 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:01:49 ThompsonFarms weewxd[1952]: ERROR >>>> weewx.drivers.vantage: LOOP batch try #1; error: Expected to read 99 chars; >>>> got 0 instead >>>> Aug 02 15:01:50 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:08:28 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Requesting 200 LOOP packets. >>>> Aug 02 15:08:28 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> Aug 02 15:15:06 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Requesting 200 LOOP packets. >>>> Aug 02 15:15:06 ThompsonFarms weewxd[1952]: DEBUG >>>> weewx.drivers.vantage: Successfully woke up Vantage console >>>> >>>> -- >>>> 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 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