ESP8266 Activated Carbon Formaldehyde Removal Main Control Board

Activated carbon is used to adsorb formaldehyde, the outer shell is made by 3D printing, the PCB is made by JLCPCB, a centrifugal fan with high air pressure is used, the ESP8266 is connected to the network, and the Blinker can be remotely controlled and historical formaldehyde concentration can be viewed. The total cost is estimated at 90 yuan.
Please see the video on Bilibili: https://www.bilibili.com/video/BV1aapieMEst/ Overview:
                        https://www.bilibili.com/video/BV1hapieTE1L/ Hardware Introduction
                        : https://www.bilibili.com/video/BV1TE4zeEERW/ Software Introduction:
ESP8266 main controller,   
CJSH22 formaldehyde sensor: https://detail.tmall.com/item.htm?_u=k3v6gk0837d&id=609585259969&skuId=4884397220013&spm=a1z09.2.0.0.57172e8dZZ7wus
The screen uses an IIC. 12864
motor for automotive blowers with fan: https://item.taobao.com/item.htm?_u=k3v6gk01cae&id=612166551562&spm=a1z09.2.0.0.57172e8dZZ7wus
3.3V to 5V PWM chip: https://item.taobao.com/item.htm?_u=k3v6gk06122&id=636691499892&spm=a1z09.2.0.0.57172e8dZZ7wus
Activated carbon filter housing for stainless steel window screens:
 
Approximately 2.5 kg of activated carbon is needed based on my designed dimensions.
 
Blinker for mobile app: https://www.diandeng.tech/doc
 
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