IoT Based Smart Switch With Bluetooth Speaker Using MQTT Protocol: Node-red Framework

This paper suggests a novel idea to implement a smart switch where users can control the appliances using a mobile app that is developed using kodular tool. A series of pushbutton was installed in the system. Users can turn on or turn off the appliances by pressing relevant buttons, which will send a message through Message Queuing Telemetry Transport (MQTT). Users can also set timer to turn on or turn off appliances after a certain time. This scheduled time will store in the database and continuously process to turn on/off the appliances at a user-specified time using the node red framework. Also, this system has Bluetooth based receiver module and speaker to hear songs which have a good amount of range to receive signal. Also, users can operate or set time intervals using mobile phone app anywhere in the world. This system will save time and gives comfort to the user to operate from anywhere.