This robot is able to solve a maze.
Do you find yourself checking the last entry of your ThingSpeak data trend all the time? Don't you wish you could just ask Alexa?
In this project I use RASPBERRY PI and AWS to control a food dehydrator from Android. Data are send to S3 and publisher write status to IoT.
It's a pretty common question, and all the solution takes is an Edison, AWS, wire and photoresistors.