The original weatherlinkip-parser.py python script will not retrieve daily ET values.  This claim is based on not seeing the values for daily ET in the log.

I discovered that by modifying this line in the script:

day_et = struct.unpack('H', raw_data[57:59])[0]  / 1000

To this:

day_et = struct.unpack('H', raw_data[57:59])[0] * .001

This solves the problem.  I now see the Daily ET values from the weather station in the log

There is still a problem, however, as these daily ET values don't seem to be used by the Mixer as they don't show up in the ET graph.