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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Bluetooth Low Energyをはじめよう
クライアントがアトリビュート値をサーバーから読み出したい、あるいはサーバーへ書き込
みたい場合には、ハンドルとともに読み出しまたは書き込み要求をサーバーへ発行する。サー
バーはアトリビュート値またはアクノリッジで応答する。読み出し操作の場合、アトリビュー
トの UUIDに基づいて値をパースしデータ型を理解するのはクライアントの責任だ。一方、
書き込み操作の場合には、クライアントがアトリビュートの型と一貫したデータを提供する
ことが期待され、サーバーは型が一致しない場合には書き込み操作を拒否できる。
ATT 操作
ATT で可能な操作は、以下のカテゴリに分類される。
⦿エラー処 理（Error Handling）
任意の要求に対してエラーが発生した際の応答として、サーバーによって用いられる。
以下の操作のみが含まれる。
• エ ラ ー 応 答（ Error Response）
エラーのため要求がサーバー上で実行できなかった場合、本来返されるべき応答の
代わりに、その要求への応答として送信される。
⦿サーバー構成（Server Configuration）
ATTプロトコルそのものを設 定するために 用 いられる。以 下 のみが 含まれる。
• MTU 交換要求／応答（Exchange MTU Request/Response）
クライアントとサーバーとの間で、それぞれの最大転送単位（MTU、受容可能な最大
パ ケ ッ ト サ イ ズ ）を 交 換
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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.