New Davis2 weewx install............no data from last year from the dongle

[Joe]

I just installed weewx on a davis2 in a remote location that has been online for 10 years with the DONGLE attached.

I started weewx and it only has the last three months of data in the history.

Does anyone know why it is not displaying all the previous data on the dongle?  

Does weewx pull that data by default if it was there, and possibly this means the data has been deleted somehow? THe station owner stated they havent touched anything related to the data.

[gjr80]

Hi,

By 'dongle' I presume you mean one of the Davis data loggers. If so the logger has a fixed memory and stores archive records in a round robin fashion (ie once memory is full the oldest record is overwritten with the newest). How long a history you can store depends on your archive interval; the logger can store 2560 records so at one minute that is a little over 42 hours, at five minutes just under nine days and at 120 minutes about seven months. The default 30 minute archive period gives about two months of recorded history. Sounds like you may have a 60 minute archive period?

And yes on startup WeeWX will download any (previously unseen) history from a Davis station.

Gary

[Joe]

Correct.  The data logger.

I was assuming that the logger would store more than the two months of data.  So it is storing exactly what it should it seems. 

Well then, I guess it is doing what it is supposed to.

Well dangit, I figured it would store at least a year of data or two.

[gjr80]

Here's the source document for the USB logger, you want the section Data Logger Archived Data (the serial and IP loggers are the same in this regard)

Gary