创作立场声明：本文所有使用设备均为本人自费购入
追加修改(2021-04-28 21:47:55):
题目修改为：homeassistant系列（三）：我的智能家居之路——如何利用homeassistant实现厕所自动开关灯
重点：每秒检测，最低可以调成延迟2秒左右
看到这个题目有人肯定会说这不很简单吗？买一个声控或者感应灯泡人过开灯或者喊一声开灯不就行了，但是如果你蹲在厕所里不动，是不是需要过一会喊一声嘿哈呢。
现在智能家居越来越深入人心，当然米家的接受度更高，因为设置简单。但是个人使用过程中觉得小米家不是很好，主要存在一下几个问题：1.感应间隔时间太长，小米人体感应器是1分钟感应一次，这就让人很无语了，1分钟后有可能检测不到你的存在直接给你把灯关了，而且你挥手半天它都不感应再次开灯。2.你的家里不可能全是小米的，所以如果有其他的设备存在，加入不到米家，无法联动。
实现功能：
有人自动开灯，没有人活动自动关灯，如果开灯后厕所门关闭，则灯永不会关闭。只有在门打开，并且厕所中无人活动感应，灯才会关闭。避免了人在蹲厕所，直接关灯的尴尬。
家里万一有老人习惯用开关，开关与这个感应不冲突。
所需设备
所需要用到的设备如下：
1.易微联网关
2.易微联人体感应器（感应间隔可调，最短可以调成2S左右）
3.小米的门窗感应器，因为小米的比易微联的感应宽度更大，需要搭配小米的网关使用。当然为了省钱也可以选择易微联的wifi门窗感应器。
斜着放感应范围更大点，不需要完全对牢。
4.易微联的灯座
5.433开关
折腾过程
1.安装homeassisant，本文章不做赘述，玩智能家居的都懂，因为我本身家里有软路由24h运行，所以我选择在虚拟机中添加了homeassisant。当然也可以NAS docker中安装，网上教程较多。
2.在/config/configuration.yaml中加入如下：
sonoff: #易微联
username: +8613xxxxxxxxxx（注意：后有一个空格，username前有2个空格）
password: 你的易微联账号密码（注意：后有一个空格， password前有2个空格）
reload: always （注意：后有一个空格， reload前有2个空格）
3.完成第二步后重启homeassistant，然后可以在开发者工具中的实体中查看到每个设备的ID及状态情况。
4.我选择安装的为hassio套装，所以在supervisor中安装了Node-red
5.将下面的流程复制，在Node-red导入节点，将会得到下面的流程，延迟20s自己可以调短，总的思路就是当易微联的人体感应器感应到关闭后，感应小米门窗感应器的闭合状态，如果是打开的则延迟20s后再次查看易微联人体感应器的状态，如果依然为关闭状态则执行下一步，最后关闭灯。如果是打开状态则返回前面再次检测小米门窗感应器的状态，形成一个只要是人在就无限循环20s不关闭灯。后面我加入了一个易微联插座作为这个自动化的开关按钮，如果这个插座是关闭的，则这个自动化关闭，此步（即方框内）可选择不加入。
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总结
我家是老房子，老旧线路的局限也阻拦不了我变懒的决心，智能家居的使用让生活更加方便。第一次发文，如有不足评论指出。
