I took your post as criticising the commercialising.
@nickrout got it - sorry I was not - I think it’s cool and definitely ordered 1 to try out will let you know how it is. (Also this reminded me of the famous “Was that sarcasm” scene from Big Bang Theory: "Was That Sarcasm?" - Sheldon Cooper - The Big Bang Theory - YouTube)
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Sorry I didn’t get it, I am not a Sheldonista, more my son’s generation. I get the humour, just haven’t fanatically followed the show 
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Hello all,
I am relatively new to ESPhome and Home Assistant, so I think it is better to ask…
I noticed that the MQ-2 initial resistance change over time or at the startup. So I found this article.
https://diyprojects.io/mq2-gas-smoke-detector-arduino/#.YVzBTdpByUk
So how can I make the automatic calibration… something like…
on boot… from 2nd to 5 minute to calculate the mid-value and set that value to a global variable
(I am using NodeMCU)
(i don’t know should I calculate all the curve ppm values, coz it’s good for me to be notified if the analog value increases dramatically from the initial mid-value).
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Hi,
Is there any best practice solution to calibrate this sensor accurately? Since the gas sensor will provide a kind of security at my kitchen, this is critical for me 
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That’s the ugliest PCB of all time! Just kidding man. Gotta start somewhere. Been wanting to start myself…designing PCBs. Been a few years…hope you’re still watching. Would love to see how it worked out.
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