Meet the Voltaire: a portable, WiFi connected grinder that lets you measure bean freshness and reorder fresh beans before you run out. The developers have come up with a smart platform to take into account temperature, humidity, bean mass, and volume, and other factors to tell you about the freshness of your beans.
The companion app helps you make sense of all the data. It monitors total bean storage and alerts you when you need to buy more beans. The grinder has a digital LED timer and LED lights to illuminate the grinds as they come down. With the Voltaire API and SDK, you can develop your own solutions. You can support this project on Kickstarter.