basically, a enclosure for a 4x relay usb controller for home automation or general network/internet controllable functions.

Im using this relay board so as to control the power for my 3d printers and ancillaries via the internet which will allow me to design away from home and power up and start prints via a internet connection before I even get home.

the relay board used is quite a common found one and can be found on ebay, gearbest and banggood (I bought from the latter)

geeetech i3 pro b

No

No

0.3

30%