Bluetooth Essentials for Programmers by Albert S. Huang

By Albert S. Huang

This publication presents an advent to Bluetooth programming, with a selected specialize in constructing actual code. The authors talk about the main strategies and methods concerned with Bluetooth programming, with precise emphasis on how they relate to different networking applied sciences. they supply particular descriptions and examples for growing functions in a couple of programming languages and environments together with Python, C, Java, GNU/Linux, home windows XP, Symbian sequence 60, and Mac OS X. No prior adventure with Bluetooth is believed, and the fabric is acceptable for a person with a few programming history. The authors position specific emphasis at the crucial strategies and strategies of Bluetooth programming, beginning easily and permitting the reader to speedy grasp the fundamental thoughts earlier than addressing complex gains.

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Personal Area Network: Allows Bluetooth devices to form IP networks, and especially to share one device’s Internet connection with the other. Human Interface Device: Allows Bluetooth mice, keyboards, and other input devices to be used with Bluetooth-enabled computers. Serial Port Profile: Allows RFCOMM connections between two Bluetooth devices to be treated as serial cable connections. This is certainly not a comprehensive list of all Bluetooth Profiles, just some of the more popular ones. If you find yourself needing to implement or understand one of the Bluetooth Profiles, you can find the specification and all the details for that particular profile on the Bluetooth Web site,∗ where they are freely distributed.

6 summarizes their differences. Almost all Bluetooth-enabled cell phones, headsets, laptops, and other consumer-level Bluetooth devices are class 2 devices. Class 1 devices are also widely available to consumers, but class 3 Bluetooth devices are rare at the time of this writing and we suspect they will remain so. 6 are only rough estimates used for advertising purposes. In practice, the useful range of a Bluetooth device can vary significantly with the environment and conditions of use. Walls, buildings, trees, desks, and other obstructions all affect the strength of a signal.

For example, set l2cap mtu ( l2cap sock , new mtu ) ¯ ¯ ¯ ¯ This method is fairly straightforward, and takes two parameters. The first, parameter 12cap sock, should be a connected L2CAP BluetoothSocket. The second, new mtu, should be an integer specifying the incoming MTU for the local adapter. Calling this function affects only the specified socket, and does not change the MTU for any other socket. Here’s an example of how we might use it to raise the MTU: 49 PAB CUNY993C-Huang 978-0-521-70375-8 July 18, 2007 8:41 Bluetooth Essentials for Programmers l2cap sock = BluetoothSocket ( L2CAP ) ¯ .

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