Is the date set right on the Raspberry Pi? Is WeeWx using the correct time zone? Is daylight saving time change calendar correct? Maybe something is thinking that the time changed to standard time before it was supposed to and maybe it was always off by one hour before but you didn't catch it till now that it is showing up like 2 hours off?
I don't know the answer. But these are some troubleshooting steps I would take.
This could be a problem on WU side also with regard to the same types of time issues.
You could try using a JSON client and doing a manual upload to WU and see how it shows up. This would confirm if it is a WU or a WUnderfixer issue. I've done this in the past just to learn how the API worked and back when I was trying to edit data before learning that they had temporarily removed that option.
On your other point haven't noticed any missing data on WU. I looked and my past two days my data shows up on the 4s and 9s consistently. No delay in graphs either.
Galfert
Many, many thanks for taking an interest. I've been busy!
Checked the times on both the Vue Console and the RPi, both were fine. Also checked the epoch (Linux) times on the records being produced, they were fine as well.
So, updated/upgraded the firmware/software on the RPi and tried again, the issue persisted. About two hours after upgrading the RPi I suddenly found that no records were being saved to the data logger, so reseated that, still no records. Set about trying to delete all the data held on the logger, failed! Phoned the Weather Shop (UK) where the unit was purchased three years ago and spoke to them on Thursday morning to see if they could isolate an issue with the logger, the second I mentioned 'Linux' they coughed, we only deal with Windows. However, they did say that it was probably a logger issue so ordered another one which they were happy for me to send back if it did not turn out to be the issue.
In the meantime, I switched over to a windows laptop and downloaded/installed a trial copy of Weather Display and set that up to upload to WU, that worked fine and was timely with no issues whatsoever.
New logger arrived this lunchtime, plugged it into the console and resurrected the RPi. First three records uploaded perfectly and then the delays started again, about 50% of the data was getting through, the rest would only get through (eventually) post a resend (WUnderfixer).
Now for the strange part. I went into my weeWx config file and changed over from a five minute to rapid fire upload, now everything is working fine on the 4s & 9s.
Solved. But there is an underlying issue somewhere either in weeWx or my configuration.
Regards
Dave