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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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.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.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.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.
025
アドバタイズパケットの種別は上位層で利用される。具体的にいうと、動作モードを区別
し手順を定義するためにGAPによって 用 いられる。したがって 、042ペ ー ジ の「 モ ード と 手 順 」
では、これらのパケットが中心的な役割を演じることになる。
コネクション
コネクションを確 立 するに は 、マスターがまずスキャンを 開 始して 、その 時 点 でコネクショ
ン要求を受け付けているアドバタイザを探す。アドバタイズパケットは Bluetoothアドレ ス
や アド バタイズ データそのもの によってフィルターすることが できる。適 切 なアド バタイズを
しているスレーブ が 検 出されたら、マスターはそのスレーブ へコネクション 要 求を 送 信し 、スレー
ブが応答すれば、コネクションを確立する。コネクション要求パケットには周波数ホップの
増分が含まれ、これによってコネクションの寿命の間マスターとスレーブの両方がしたがうホッ
ピングシーケンスが 決 定される 。
コネクション
とは単純に、事前に定義された時点で行われるスレーブとマスターでの間のデー
タをやり取りするシーケンスのことだ。図 2-5に 示 す ように 、1 回 の やり取りはコネクション
イ ベ ント と呼ばれる。
アド バ タイズ
パ ケ ット の 種 別
コネク
ション
スキャン 有向／
無向
GAP
ADV_IND 可能 可能 無向 Connectable Undirected Advertising
ADV_DIRECT_IND ...
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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.