It's mainly built for the Internet of Things. For example, the temperature information can be transmitted in real time through Bluetooth from device to mobile phone. Meanwhile, the data can be graphically displayed on the App.
(1) Android/iOS App for bluetoothSerial HC-05 developed with Cordova, using Javascript. (2) Please set up the development environment of Cordova. (3) The code is developed for the bluetooth module, HC-05.