Process

In this project,  a photoresistor and a LED will be use.

This app will publish an event when the beam of light between the LED and the photoresistor is broken.( In real life, it means a insect pass though)It will also publish an event when the beam of light between the LED and the photoresistor is broken.( then we know how many time the insect used to pass the LED. Because we already know the size of LED, we can get the speed of insect by divide the length of LED by the time between 'broken' and 'intact'.)

The final step is use IFTTT to link Particle with my gmail, then I can receive an email when the action 'broke' happens.