I remember learning Morse code in the Boy Scouts. We were out on a camping trip in the winter where you're supposed to pull sleds around in the snow. But there wasn't any snow, so we pulled a full sled through the dirt from adventure to adventure. Not fun. But I remember learning about morse code.
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
For my ICM final, I built a sketch that reads Morse code via brightness detection, displays the message on screen & sends the message to a Philips Hue Connected Bulb over the internet.