WiFi switch for AC appliance
Are you looking for a simple design of a DIY remote switch for controlling your AC appliances over WiFi, this Instructable provides details of making such a switch from scratch. The project uses ESP8266 WiFi module that communicates with a phone using the Blynk app. The entire circuitry is enclosed inside a box with a male plug that goes to the wall socket, and a female input plug for your device. The controller receives the power supply from the mains socket.
DIY WiFi relay switch