Lable: DIY Gas Monitor --- If you can follow the first tutorial [Tutorial 1 DIY Gas Monitor with open source hardware -Particles][1] completely, this tutorial is just a piece of cake for you, which will just take you 10 minutes. This tutorial teaches you how to monitor particulate matter, formaldehyde, temperature, humidity at the same time. Just like this: ![此处输入图片的描述][2] ## Work 1：Prepare Hardware [Tutorial 1 DIY Gas Monitor with open source hardware -Particles][3] The hardware PM5003 in it is no longer needed, and please read tutorial 1 first. Two things need to be added 1. PM5003S（G5S） fully compatible with PM5003 (G5), with one more formaldehyde data output, so do not buy the wrong type. G5S will be more than 100 yuan more expensive than G5. (G5S is not G5, nor G5ST. Please pay attention to the type.) ![PM5003S][4] 2. SI7021 module to test temperature & humidity and output values. It is recommended to buy the one with soldered pin。 ![SI7021][5] ## Work 2: Flash Software Please refer to [Tutorial 1 DIY Gas Monitor with open source hardware -Particles][1] > Why the software in tutorial 1 still be used in tutorial 2? Because someone has upgraded the code. People who are interested in it can see the GitHub commit records. ## Work 3：Wire Connection Because PM5003S (G5S) and PM5003 are exactly the same, so this tutorial is basically the same as tutorial 1 [Tutorial 1 DIY Gas Monitor with open source hardware -Particles][1] , with only one more SI7021. SI7021 | NODEMCU+OLED integrated development board | ----|------| ＶＣＣ | ３.３Ｖ　(Don not connect it to 5V.) ＧＮＤ | ＧＮＤ ＳＤＡ | Ｄ５ ＳＣＬ| Ｄ６ ## Work 4: Get the data online Please refer to[Tutorial 1 DIY Gas Monitor with open source hardware -Particles][1]. ## Reference Tutorial 1：[Tutorial 1 DIY Gas Monitor with open source hardware -Particles][1]. [1]: https://www.kancloud.cn/xjme/devicebitusermanual/391415 [2]: http://doc-resources.lewei50.com/lewei50/img/lewei50-20170630-1.jpg [3]: https://www.kancloud.cn/xjme/devicebitusermanual/391415 [4]: http://doc-resources.lewei50.com/lewei50/img/lewei50-20170630-3.jpg [5]: http://doc-resources.lewei50.com/lewei50/img/lewei50-20170630-2.jpg [6]: http://www.jianshu.com/p/c049cbea27aa [7]: http://www.jianshu.com/p/c049cbea27aa [8]: http://www.jianshu.com/p/c049cbea27aa