Ultrasonic Anenometer

Here my early tests for making a wind sensor out of cheap, accurate hcsr04 ultrasonic sensors. Made 2 opposite each other for wind speed, progressed to adding another 2 to read all 4 sensors bouncing back and forth to each other.

Tried to calculate the wind direction with sending the reading into processing, need to stabilise the structure a little more and test again as we couldn't quite get a definitive angle to point one way or another.

Looking at this http://wx.gmu.edu/dev/clim301/lectures/wind/wind-uv.html and other links as we progress.