February 2015
Intermediate to advanced
200 pages
4h 48m
Japanese
Content preview from Bluetooth Low Energyをはじめよう
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138
Bluetooth Low Energyをはじめよう
また CBUUIDは、定義済みのサービスや特性の16ビ ット UUIDを、対 応 す る 128
ビットの完全な形式に変換する（詳しい情報については、058ペ ー ジ の「 UUID」
を 参 照 ）。 次 に 、
CBCentralManager
オブジェクトがインスタンス化され、その
scanForPeripheralsWithServices
メソッドへの最初の引数として、UUIDオブジェ
クトのリストが提供されている。ここでは、デバイス情報サービス（
UUID
16
=0x180A
）と バ ッ
テ リ ー レ ベ ル サ ー ビ ス（
UUID
16
=0x180f
）と い う 2つ の サ ービス の みをア プリが スキャン する 。
要 求されたサービス UUIDを ア ド バ タ イ ズ デ ー タ（ 表 3-3参 照 ）に 含 む ペ リ フ ェ ラ ル だ け が 、
見 つかれ ば 返される。
scanForPeripheralsWithServices
メソッドの最初の引数に、関心のある
CBUUIDの リ ス ト（
services
）で は な く
nil
が与えられた場合には、到達範囲にあるすべ
ての BLEペリフェラルが 返されることに 注 意してほしい 。サービスを持 つ 可 能 性 のあるペリフェ
ラルをすべて実際に調べたい場合以外には、これは一般的によいプラクティスとは言えな
い。BLE 無線ハードウェアを酷使し、バッテリーの消耗 ...
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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.