作者：sonatasss

前言

可能是个人焊接问题ESP32C3 adc功能没有测试成功

所以没有集成燃气传感器，换成了温湿度

所用传感器

温湿度：DHT22

CO2:SenseAir S8

PM2.5+甲醛:攀藤 PMS5003S

燃气：MQ-7 一氧化碳

压电式蜂鸣器

所用开发板

合宙esp32c3

ESP-WROOM-32E

代码示例

esp32c3（PM2.5、CO2、甲醛、温湿度）

https://gitee.com/sonata1/esphome/blob/master/空气质量传感器/ecp32c3.yaml

esp32 wroom（PM2.5、CO2、甲醛、燃气）

https://gitee.com/sonata1/esphome/blob/master/空气质量传感器/ecp32wroom.yaml

所用字体

https://gitee.com/sonata1/esphome/raw/master/墨水屏/WenQuanDengKuanWeiMiHei-1.ttf

个人觉得没有必要集成温湿度传感器

温湿度功耗很低，电池供电即可，而且米家等其他现有方案也很便宜

另外DHT22不好用，建议换I2C协议的SHT30

 接线

攀藤pms5003s集成了pm和甲醛传感器

如图我们只需要 1、2、4、5针脚即可

准备4根母头杜邦线，分别和这4根线接一起就可以了

注意漏出的电线做下绝缘，没有热缩管随便拿贴纸粘下 

代码部分我设置4分钟读取一次

风扇会自动休眠210秒，工作30秒读取数值

大家可以修改成合适的间隔时间

co2传感器之前讲过

温湿度

DHT红线和绿线之间要加个电阻，4到10K都可以

这里注意合宙的墨水屏，默认gpio11不能用的

所以要busy要接在gpio5上

如果接线和我一样，那示例代码直接可以用了

ESP WROOM-E32

这个供电端口不够要用面包板了

接线参考eps32c3

这里讲下燃气传感器

可以看到AO输出是模拟输出

其实我们也不是特别关心具体数值

只要别超过危险阈值就行

所以直接读电压或者做个除法显示大概数值都可以

这里我选择gpio35连接传感器AO针脚读取电压

做出趋势图显示在墨水屏

然后做了一个超过0.3v报警的判断

判断代码如下

蜂鸣器正极接在gpio13上

注意要选压电式蜂鸣器，所需电流小

做好后用酒精湿巾放在传感器旁测试一下

测试成功 

总结

本期依然没有什么新内容

只学一个ADC电压采集

算是之前学习内容的一个组合

就不上视频了

pms5003s的内置甲醛传感器也是达特电化学传感器

所以也是有使用寿命，一般2-3年左右就该更换了

如果不想用5003s也可以选7003配单独甲醛传感器

另外，性价比上肯定遗产M1更高

不过M1上的传感器差不多也到寿命该换掉了

还是自己DIY一个比较方便

大家可以改动参数修改成适合自己的

传感器部分基本告一段落了

下期开始学别的东西    

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范亮复3498煤气报警器怎么校零 -
宿李贤19166454278 ______ 气体报警器零点校准首先是要配置好高纯氮气或新鲜空气,连接管路、减压装置、标准电流表等相关设备,把电流表按照图6所示连接到气体报警器的线路板端子上,气体管路连接到气体报警器标定接头与流量表上,通入高纯氮气或新鲜空气(注意:流量应控制在200-500ml/min左右),此时,气体报警器输出应为“4mA”,电路板采样测试点TP1输出电压值应为40mV.否则调节零点电位器(即“O”电位器),注意:顺时针旋转电位器,输出值减小;逆时针旋转电位器,输出值增大.

范亮复3498气体报警控制器ESC500接线端子接几根线? -
宿李贤19166454278 ______ 你是分线还是总线,分线3根总线4根,看情况...有什么问题问我.

范亮复3498我家装的是冠林可视对讲,家里有一个煤气报警是连在一起的,装修的时候把线插弄丢了,现在不知道怎么接线 -
宿李贤19166454278 ______ 说明书还在吗,报警设备和家中的室内分机只是配套使用的,不是一家生产的.煤气报警属于常开报警设备,一般情况下是4芯线,两根电源;两根信号线,两根信号线和室内机连接,电源是在煤气报警器附近就近供电的(12V).

范亮复3498天然气报警器响了怎么办?
宿李贤19166454278 ______ 我们先看一下报警器的构造,一边插电源线,一边连接断气阀,正常状态下,报警器指示灯是绿色的,当报警时,指示灯呈红色,并有警报响起,响一段时间后会自动切断...

范亮复3498厨房燃气报警器一般装在哪里? -
宿李贤19166454278 ______ 液化气比空气重,安装在距地面约0.3米处. 天然气、城市煤气、一氧化碳等比空气轻,安装在距天花板约0.3米处. 不能安装报警器的位置:墙角、柜内等空气不易流通的位置. 液化气比空气重,安装在距地面约0.3米处. 天然气、城市煤气、一氧化碳等比空气轻,安装在距天花板约0.3米处. 不能安装报警器的位置:墙角、柜内等空气不易流通的位置

范亮复3498消防声光报警器如何接线? -
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范亮复3498请问燃气报警器 联网方式是什么意思 -
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范亮复3498燃气报警器电源线能与燃气管道放在一起吗 -
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范亮复3498燃气表在柜子里面怎么安装燃气探测器 -
宿李贤19166454278 ______ 如果燃气表在柜子里面,需要安装燃气探测器的话,可以按照以下步骤进行:1. 找准位置:首先要找到燃气管道的进出口位置,并且确定好需要安装燃气探测器的位置.通常情况下,建议安装在离燃气表不远的地方,同时也要与燃气管道有一定...

范亮复3498谁知道不锈钢灶台怎样安装插座
宿李贤19166454278 ______ 你好. 1.所有台面的插座距离地面110cm,建议安装带开关的五孔插座. 2.燃气报警器需要预留一个插座,安装高度根据实际情况确定. 3.暗装插座距地面不低于0.3米,为防止儿童触电、用手指触摸或金属物插捅电源的孔眼,一定要选用带有保险挡片的安全插座. 希望我的回答对你有帮助谢谢.