The Sprite unit will blink quickly whenever it is trying to (re)connect to a WiFi network. This happens when you first set up your unit, or whenever it loses its connection. If you have not changed your home WiFi, try to reboot the Sprite (unplug and replug the power) and the connection might be restored. It may also blink slowly when it is in host mode. This happens when you first plug in your Sprite or reset it, and indicates that it needs to go through the setup steps to connect to a home WiFi network.