I want something fairy inexpensive but this is just an experiment for his class for the internet of things. Just wondering what could be modified for a sensor.
I know this is out there but I am helping my girlfriend's middle school kid on a project. He is trying to build a sensor in a Pez candy dispenser to know how many candies are left as it dispenses. He wants to put in blue tooth and app it to his phone. Any suggestions for the Pez end? It is just...