Dale
Yes, that’s correct the the “1-wire reader” uses the data from the LR4/414D connected to a USB port. It’s really a nice, but slightly pricey project. Several of us have worked with Brian over the years to get this working. I originally start with ultrasonic sensors and some started with IR sensor and the LR3/411D came along followed by the LR4/414D project. You can check mine out at www.mikeymsweather.com/wxsnowgraph.php
It’s working Very well today.
If you need any more info let me know.
MikeyM
