Thanks to BlueRick for this FAQ
How to install the Inspeed Vortex with Weather Display
http://www.inspeed.com/anemometers/Vortex_Wind_Sensor.asp
Before you order, make sure where you are going to mount and order enough wire. The Inspeed is prewired and ready to go. Lorenzo has premade packages atr 25’, 50’, 75’ and 100’.
Additional parts:
You will need to order the DB9 connector from Inspeed
If your computer doesn