I Have two years that i begin working with this project. I say why not we make a system that can monitor and visualise temperature in many place and many corner. so the idea is to make small module rf with temperature / humidity sensor and battery CR2032. each module (called node) can communicate with central. the central have access to local network and present data with integrate web server. so when you put ip adress in chrome or mozilla, a web application called and you can monitor all temperature sensor and give idea about temprature repartition in your local.
also I thinked to add alerts, a speaker module that can configured for temperature that send alarms when temperature quit intervals. also i thinked in relay, so we can make the rf cover big to vommunicate with all modules
SO WHAT DO YOU THINK IN THIS IDEA? ALSO CAN BE COMMERCIALIZED?