How does a bluetooth work?

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  • Nov 22nd, 2007

A Bluetooth device playing the role of the "master" can communicate with up to 7 devices playing the role of the "slave". This network of "group of up to 8 devices" (1 master + 7 slaves) is called a piconet.

At any given time, data can be transferred between the master and 1 slave; but the master switches rapidly from slave to slave in a round robin fashion. (Simultaneous transmission from the master to multiple slaves is possible, but not used much in practice). Either device may switch the master/slave role at any time.

A Bluetooth enabled device can connect to other Bluetooth enabled devices in proximity. Each device can simultaneously communicate with up to seven other devices within a single piconet.The data between the devices are shared in the round robbin fashion. Each device can also belong to several piconets simultaneously. Piconets are established dynamically and automatically as Bluetooth enabled devices enter and leave radio proximity.

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Kuldeep Chaturvedi

  • Jun 16th, 2017

Bluetooth works on radio waves.
This technology operates on 2.4GHZ spectrum. which is generally known as ISM (Industrial/Scientific/Medical).
BT share this spectrum with IR, WiFi technology as well.
Since ISM is widely used and free, BT is widely acceptable technology.

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