Use Amazon Web Services to coordinate control of many (swarms) of $20 radio receivers, creating a giant virtual radio scanner and monitor.
Monitor the effect of trees and traffic congestion on air quality.
This is an Alexa-enabled (voice) drink maker powered by a Raspberry Pi and AWS IoT.
Amazon released an AWS IoT button but made it really difficult to get a hold of. Why not build your own and customize it to your liking.
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.