The tutorial is in two folds. The first session is to help you get the basic parameters of your Bluetooth module,such as the password and MAC-Address of the module.
The second session is to help you use the Ardudroid App to connect to the Bluetooth module. As well as use it to on / off leds and a buzzer.
Also the App helps to data from an ultrasonic sensor.
This tutorial is the product of TeNerdz.
You can download the ArduDroid App using this link: https://play.google.com/store/apps/details?id=com.techbitar.android.Andruino&hl=en