April 2012
Intermediate to advanced
770 pages
16h 48m
English
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Chapter 18. Bluetooth
18.1. Introduction: Bluetooth
Discussion
Bluetooth technology allows users to connect a variety of peripherals to a computer, tablet, or phone. Headsets, speakers, keyboards, and printers; medical devices such as glucometers and ECG machines; these are only some of the numerous types of devices that can be connected via Bluetooth. Some, such as headsets, are supported automatically by Android; the more esoteric ones will need some programming. Some of these other devices use Serial Port Protocol (SPP), which is basically an unstructured protocol that requires you to write code to format data yourself.
This chapter has recipes on how to ensure that Bluetooth is turned on, how to make your device discoverable, how to discover other devices, and how to read from and write to another device over a Bluetooth connection.[1]
A future edition of this work will provide coverage of the Bluetooth Health Device Profile (HDP) standardized by the Continua Health Alliance.
18.2. Enabling Bluetooth and Making the Device Discoverable
Problem
The application requires that the Bluetooth adapter be switched on, so you need to check if this capability is enabled. If it is not enabled, you need to prompt the user to enable Bluetooth. To allow remote devices to detect the host device, you must make the host device discoverable.
Solution
Use intents to prompt the user to enable Bluetooth and make the device discoverable.
Discussion
Before performing any action with an instance ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.