January 2024
Beginner to intermediate
560 pages
8h 38m
Japanese
Content preview from Raspberry Piクックブック 第4版
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18章 ホームオートメーションHome Automation
低コストで低消費電力のデバイスであるRaspberry Piは、ホームオートメーションのハブに最適だ。電気料金を気にせず、動かしっぱなしにしておけるからだ。この章で説明するレシピには、Raspberry Pi 4のパワーは必要ない。実際にはRaspberry Pi 2や3でも速度は十分だし、発熱量や消費電力もRaspberry Pi 4や400より少なくて済む。
この章ではまずMQTT（Message Queuing Telemetry Transport）という、大部分のホームオートメーションシステムに使われている基本的な通信メカニズムを説明し、次にNode-RED（17章にも登場した）を基盤としてホームオートメーションを作り上げていく。
厳密に言えば、ホームオートメーションとは自宅をより賢くし、より多くのことを自動化することを意味する。例えば、動くものを検出したら一定時間だけ照明をオンにするとか、就寝時間になったら自動的にすべての電源をオフにする、といったことだ。しかし、ホームオートメーションに興味のある大部分の人は、自宅にある家電製品をリモートコントロールすることにも興味を持っている。この章では、スマートフォンからリモートコントロールを行う方法も見ていく。
レシピ18.1：Mosquittoを使ってRaspberry Piをメッセージブローカーに仕立てる
●課題 Raspberry Piを、Mosquitto MQTTソフトウェアを利用したホームオートメーションシステムのハブにしたい。
●解決 Mosquittoソフトウェアをインストールして、Raspberry PiをMQTTブローカーとして動作可能にする。 ...
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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.
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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.