Electronic devices connect to one another in a variety of ways where the most famous wireless technologies are infraree and Bluetooth. Infrared is the technology that you can see in TV remote controls or air conditioner remotes where the communication should be pointed to the target device. WiFi technology is used for strong and wide area communication where wireless communication can be made. A cable connects a computer's processing unit to a display, a data cable and a docking cradle connect a personal digital assistant (PDA) or a cellular phone to a computer, radio
waves connect a cordless phone to its base unit, and an infrared beam connects a remote control to a television. That's where Bluetooth comes in.Bluetooth technology is the most used temporary communication technology, Especially inside mobile devices, palm tops, pocket PCs, and so forth. It can be used to exchange objects, packets, or a simple stream
Content of this tutorial
What is Bluetooth? , Bluetooth Network Topology , Bluetooth Communication Types , What's JABWT & JSR82Bluetooth stack layer , Code and Explanation and finally The last word.
Let's get started!
What's Bluetooth?
Bluetooth is a wireless communication protocol that Ericsson Mobile Communications started developing the Bluetooth system in 1994, looking for a replacement to the cables connecting cellphones and their accessories. It's supports distances equal up to 30 feet, or to 10 meters but consumes less power, and transmits at lower speeds. Bluetooth is very attractive to phone and PDA manufacturers due to its low power consumption rate. The Bluetooth system is named after a tenth-century Danish Viking king, Harald Bltand, who united and controlled Norway and Denmark. The first Bluetooth devices hit the market around 1999.
Bluetooth vs. Infrared
Home electronics devices like TVs and VCRs communicate using beams of light in the infrared spectrum. Infrared is fairly reliable and doesn't cost much to build into devices. It does have drawbacks
1-Its line of sight, so sender must align with its receiver.
2- Its one to one, so a device can't send to multiple receivers at the same time.
Bluetooth vs. 802.11b
IEEE 802.11b connects devices in a wireless local area network (LAN), while Bluetooth
connects devices in a Personal Area Network (PAN).
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Bluetooth Features
The major features of Bluetooth are:
1-Bluetooth is wireless and automatic. You don't have to keep track of cables, connectors,and connections, and you don't need to do anything special to initiate communications.Devices find each other automatically and start conversing without user input, expect where authentication is required; for example, users must log in to use their email accounts.
2-Bluetooth is inexpensive. Market analysts peg the cost to incorporate Bluetooth technology into a PDA, cell phone, or other product at around $20 now, and say that it could fall to as little as $5 per unit.
3-Bluetooth handles both data and voice. Its ability to handle both kinds of transmissions simultaneously makes possible such innovations as a mobile hands-free headset for voice with applications that print to fax, and that synchronize the address books on your PDA, your laptop, and your cell phone. Signals are omni-directional and can pass through walls and briefcases. Communicating devices don't need to be aligned and don't need an unobstructed line of sight.
Conclusion
In this episode I show to you basics of BT.In the next episode ISA I will discuss BT topology , types of communication protocols defined inside Bluetooth technology and what's JABWT
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