Here is just one possible application of the Serial LCD Adaptor kit. Using a raspberry Pi and just four wires you can create a headless web server. In this example we use the LCD to display the server status without the need for a HDMI display.
The possibilities for this serial adaptor are endless. We crowdfunded this project several years ago. You can buy them now in Tindie Store:
For just $6 you can have one of these kits.