Sean Jahnig <[email protected]> writes:

> I have an acurite 5-in-1 that is working but appears to be reading too
> high. It says 22 knots but it’s more like 15. Is there possibly weewx
> setting i should check before checking the hardware?
>
> I know it is not reading accurately because we use it for kite surfing
> and it has always been accurate but about 2 weeks ago I had to
> reinstall software and I’m wondering if there is an incorrect setting
> now. Because when we’re on the beach it is definitely less than is
> being shown.
>
> https://www.windguru.cz/station/2146

Note that 22 vs 15 is suspiciously like km/hr instead of mi/hr; if it
were 12 knots then 22 km/hr would match.

I would suggest:

  read the 5-n-1 manual to see how it deals with units, and if this is 
configurable.

  if you have an acurite console, compare what it displays to what you
  see in weewx

  use rtl_433 to receive the 5n1 signals (rtl-sdr dongle required) and
  compare that

  run weewx so that you see the debug messages of LOOP packets and look
  at those

  look at your archive database directly with "sqlite3 weewx.sdb
  .dump" and find the wind columns and look at the values  *

  read your config file and double check units and any stdcalibrate
  statements


* This script plots temperature into xplot format.  I am not telling you
to use xplot, but it's an example of getting data out directly, which
you should be able to adapt.  Keep in mind that this will show the
values in the units of your database.

echo "timeval double"
sqlite3 weewx.sdb "select dateTime, outTemp, dewpoint from archive order by 
dateTime;" | \
    awk -F\| '{print ". " $1 " " $2 " 1"} {print ". " $1 " " $3 " 2"}'

or do

  sqlite3 weewx.sdb "select dateTime, usUnits, windSpeed, windGust from archive 
order by dateTime;"

Also this is helpful:

  sqlite3  weewx.sdb .schema

 


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