Test the speed of sensor module PID controlled speed. When note is passed the optical sensors data is collected and shared via SWO

Dependencies:   mbed PID SWO

Revision:
0:fc81857d8067
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PID.lib	Fri Nov 30 10:22:36 2018 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/aberk/code/PID/#6e12a3e5af19