From www.particle.io : A tiny, reprogrammable Wi-Fi development kit for prototyping and scaling your Internet of Things product. The Photon is a $19 tiny Wi-Fi development kit for creating connected projects and products for the Internet of Things. It’s easy to use, it’s powerful, and it’s connected to the cloud. In this session, we’ll build a few simple programs to show off some of the basic functionality of this versatile (and adorable) device. From a blinking “Hello, World!” LED to a sensor-driven “When to Water Your Houseplant”, we’ll explore some of the countless project possibilities the Photon enables! Then we’ll check out the Electron! Where the Photon gets your Things connected via Wi-Fi, this particle gets them connected via 3G. We’ll expand on what we learned from the Photon to build a 3G-enabled DIY GPS tracker using the Electron!