This project is brought to you by Altium. I just love controlling things wirelessly over long distances using the internet is the communication medium. And over a short distance using Bluetooth or other RF transceiver modules. You might have watched my projects on SB 32 and SPA 2, double 6. ESP32 and SPA 2, double 6, 55 modules are 3.3 volt compatible controller boards. and I have been using these controller boards and IoT based projects for controlling electrical devices from anywhere in the world using different IoT platforms, including the blink application. Things speak, UV dots IFtt, Google Assistant, Firebase, and Telegram, etcetera. If you're using any of these IoT platforms or any other IoT platform, then you can only control the devices when the controller port is connected with the Wi Fi. Why use Wi Fi when we are inside a room? We can use a Bluetooth supported Android application to control different electrical loads, or we can use an IR remote controller. I have already explained how to control different electrical loads wirelessly using the ESP32 built in Bluetooth module and an Android application.