LEDI stands for LED Interface. As standby mode, it is a clock. In active mode, on the LED matrix, you can draw or type message; and setup alerts when you get a new email, text or even call. The communication is currently available via bluetooth android phone. IOS and PC application may come next.

Here are the list of available tutorials. Each one is sufficiently self-contained. You can jump from topic to topic without much concerns for discontinuity. However, if you are just starting out, it is advisable to go through at least sections 0×01 – 0×03.