The wind had increased by the time of the third measurement. It was obvious that the RPI was angled on its string about 45 degrees.

From this displacement from hanging directly down the direction of the wind can easily be obtained using the following table

By interpolating these directions a more accurate bearing may be deduced.

As the wind intensity changed, the angle that the raspberry pi hung also changed. By plotting and measuring the wind speed against this angle the Raspberry Pi's sensitivity to wind speed can be calibrated.