Hi,

One approach for a simple calculation like this could be to use the 
StdCalibrate service to set extraTemp1. In weewx.conf something like(untested):

[StdCalibrate]
    [[Corrections]]
        extraTemp1 = inTemp - outTemp

This will not be overwritten during upgrade and should achieve the same result. 
One thing to be aware of when using temperature differences is that weewx unit 
conversion will not work on a temperature difference. For example, if the 
driver for your station emits F and your database uses US units, but you try to 
display extraTemp1 in C it will be wrong. If you only display F you will be 
fine.

Gary

-- 
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].
For more options, visit https://groups.google.com/d/optout.

Reply via email to