Bluetooth Complete Tutorial Kotlin Android Studio in Hindi Part 1
In this video you are going to see how we control on/off feature of Bluetooth from our app and how we can make the device discoverable to others.

Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances using UHF radio waves in the ISM bands, from 2.402 GHz to 2.48 GHz, and building personal area networks.

Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference. Kotlin is designed to interoperate fully with Java, and the JVM version of Kotlin's standard library depends on the Java Class Library, but type inference allows its syntax to be more concise.

Android Studio is the official integrated development environment for Google's Android operating system, built on JetBrains' IntelliJ IDEA software and designed specifically for Android development.

The Android platform includes support for the Bluetooth network stack, which allows a device to wirelessly exchange data with other Bluetooth devices. The app framework provides access to the Bluetooth functionality through Bluetooth APIs. These APIs let apps connect to other Bluetooth devices, enabling point-to-point and multipoint wireless features.

Using the Bluetooth APIs, an app can perform the following:

Scan for other Bluetooth devices.
Query the local Bluetooth adapter for paired Bluetooth devices.
Establish RFCOMM channels.
Connect to other devices through service discovery.
Transfer data to and from other devices.
Manage multiple connections.
This topic focuses on Classic Bluetooth. Classic Bluetooth is the right choice for more battery-intensive operations, which include streaming and communicating between devices. For Bluetooth devices with low power requirements, consider using Bluetooth Low Energy connections.

This documentation describes different Bluetooth profiles and explains how to use the Bluetooth APIs to accomplish the four major tasks necessary to communicate using Bluetooth:

Setting up Bluetooth.
Finding devices that are either paired or available in the local area.
Connecting devices.
Transferring data between devices.