I want to make a simple and easy-to-repeat carbon dioxide level meter with the ability to control ventilation. Parcels with two sensors arrived today.
The first I ordered the most popular and cheapest sensor MH-Z19Bbut customs lost it.
Most likely, this is for the best: it turned out that this is not the best sensor for today, which has the property of "floating away" due to incorrect auto-calibration.
The second I ordered the sensor Sensair S8-0053 which is good for everyone, but quite expensive. It cost me $ 28.86 on the coupon sale, and now it costs $ 32.30.
The sensor was ordered third T6703-5K. I bought it for $ 19.41, now it costs $ 28.35.
This sensor seems to be the most accurate of the inexpensive ones.
There are many Arduino projects using the Sensair S8 sensor. I haven’t seen finished projects with T6703 yet.
However, there is a very short Datasheet, and there is also an example of using on github, in which for some reason the code itself was removed (but the code of the previous version remained).
upd: T6703 on the manufacturer's website: https://www.amphenol-sensors.com/en/telaire/co2/525-co2-sensor-modules/3400-t6703.
upd2: Found the polling code for this sensor: http://arduino.ru/forum/obshchii/telaire-t6703.
If by chance any of you have already made a CO2 meter on an Arduino using the T6703 sensor, please respond so as not to do the same thing again.
I will try to bring this project to the end and, as a result, make detailed instructions on how to assemble the exact CO2 meter with 3-stage ventilation control, parts for which cost less than 2500 rubles.
© 2020, Alexey Nadezhin
For ten years I have been writing every day about technology, discounts, places of interest and events. Read my blog on the site ammo1.ru, in LJ, Zen, Mirtesen.
My projects:
Lamptest.ru. I test LED lamps and help figure out which ones are good and which are not so good.
Elerus.ru. I collect information about domestic electronic devices for personal use and share it.
You can contact me in Telegram @ ammo1 and by mail [email protected].