Light fidelity (Li-Fi) is a widely adopted form of wireless communication that uses optical energy to verify device ...

The projector control itself is through a RS232 interface. To make this easy to use with Amazon’s Alexa, [jfessard] turned to some libraries for the ESP8266 D1 Mini.

Rather than using a web browser like some kind of peon, [David Payne] has come up with a very slick desktop OctoPrint monitor using the WeMos D1 Mini ESP8266 board.