This app controlls a relay from computer. Usable for turning ON/OFF lights, devices and other electrical devices from your PC.
To make it work it is requied a relay controller board that it easy to DIY since the schematic (included) is very simple.
This app includes a remote client for windows and a remote client for android devices (phones, tablets). With the remote client we can controll remotely the relay that is connected to a remote PC's usb port.