The Bluetooth specification embraces link layer, radio frequency and application layer. The product developers for data, voice and content-centric applications are defined using Bluetooth. The specification contains the data necessary to ensure the diverse devices. The Bluetooth wireless technology can be connected with each other network worldwide. These specifications are divided into two parts. They are Core and Profiles. The Core part specifies components such as the radio, base band, link manager, service discovery protocol, transport layer, and interoperability with different communication protocols. The Profiles part specifies the protocols and procedures required for different types of Bluetooth applications. The Bluetooth data channel randomly hops 1,600 times per second between 79 RF channels. Each Bluetooth channel is divided into time slots, with each one being 625 microseconds long. There are two types of data transfer between devices .There are synchronous connection oriented and asynchronous connectionless. Bluetooth piconet has a master and maximum seven slaves. The master will transmit in even time slots, while the slaves will transmit in odd time slots.
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