Thanks Mike!
I looked into using an addon and spent a few hours last night trying to manipulate the temperature and relative humidity and give the dew point. It was more complicated than I bargained for. I was able to parse off the "F" in the temperature from C:\Program Files (x86)\Blue Iris Tools\txt\Temperature.txt and and the % sign in the relative humidity in C:\Program Files (x86)\Blue Iris Tools\txt\humidity.txt, then trying to use the simplified equation
Dew point - Wikipedia for the dew point didn't seem to output the right value. So then I was looking into a more accurate complex version
https://steelcityelectronics.files.wordpress.com/2015/02/htu21d_dew_point_equations_crop1.png but that uses a natural logarithm function which windows batch doesn't support. I tried to output the value of a command line calculator
Command Line Calculator to be able to do the log function in the equation but got stuck, not being able to output the results of the command into a variable.
Is there any way to just grab the dew point that is reported from Wunderground rather than trying to do the calculation with the temperature and relative humidity values? I'm not a developer, so being able to do the equation in a script to output the correct value might be a bit over my head.
Thanks,
AMP