Power Supply, Raspberry Pi, Relay Module, Fan Case

It's a long name but it has multiple uses: cooling down the AC/DC power supply, switching on/off the AC/DC power supply remotely. It is also a Raspberry Pi / Relay Module case.
You can refer to the included connection diagram to see how things are connected inside this case.

Hardware:
1. Raspberry Pi with Octoprint preloaded and ready to be accessed from a Web Browser. If not, search online to see how to set it up.
2. A relay module, one channel is good for this purpose but I have 2 chan