Bluetooth

What is Bluetooth ?

Bluetooth is a smart technology device, by using this device we can communicate or send commands with other devices or near distance peripherals.

Bluetooth use 2.4 GHz frequency.

Why Bluetooth called Bluetooth  ?

Bluetooth was borrowed from the 10 th century, second king of denmark, king Harald , who was famous for uniting Scandinavia just as we intented to unite the PC and cellular industries with short range wireless link.

Bluetooth Protocol

Bluetooth versions 

Bluetooth V1.2

• Backward compatible with v1.1 faster connection and discovery.
• Recovered confrontation to radio frequency interference by avoiding the use of crowded frequencies in the hopping  sequence.
• Data speed up to 721kbit\s.

Bluetooth V2.0

• Enhance data rate for faster data transfer.
• Data speed is upto 3Mbit\s.

Bluetooth V2.1

• Backward compatible with v1.2.
• Uses secure simple pairing to improve a better pairing experience for bluetooth devices.
• Lower power consumption.

Bluetooth V3.0

• Bluetooth 3.0 provides theoretical data transfer speeds up to 24 Mbit\s.
• for high data rate traffic this version  uses the adjacent 802.11 link.

Bluetooth V4.0

• Modified than previous version.
• Provides faster data speed.
• Lower power consumption.
• More secure version.

There are some of simple circuit diagram of Blue tooth