https://hackaday.com/2021/07/05/diy-air-quality-sensor/

I completely forgot to mention that it used to make loud noises, and we had to switch it off most of the time to give our brain to rest. Once I came home and saw a lot of water around this purifier. We spent a lot of money to repair it. As a result, it went to the trash where it was supposed to be. Recently we faced another problem. A lot of giant spiders appeared in our house. We were searching for different methods online on how to get rid of them, and we found this article (spam link removed by moderator). Also, we found there another air purifier, and we ordered it straight away.

@Nca78 said in Particle Powered Air Quality Sensor Logging to Google Docs: @Sebex said in Particle Powered Air Quality Sensor Logging to Google Docs: Perhaps I don't necessarily need to use the same pins Both the sensors you quote are using I2C. So they both use the same 2 pins (SDA, SCL) to communicate. You can put many I2C sensors on those same pins, they each have an address to know which sensor is receiving/sending data to the master (here, your arduino). Look for a tutorial on I2C first. Thanks I get it now

@scalz May I request you to share your code for it please. Thanks

@alexsh1 said: @epierre The only downside is (1) price and (2) it cannot be used with batteries For these factors alone, the Figaro looks very appetizing.

Go with the Z19. Here's some ready made code: https://forum.mysensors.org/topic/6528/mh-z19-co2-sensor/5

Hi, Working with tgs2602 , tgs 2620 and tgs2611 . I've read the replies from top to bottom but haven't understood how exactly i take data from the graph in datasheet and use it with power regression .