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44% OFF MH-Z19B Upgrade Version 0-5000PPM Infrared CO2 Sensor For CO2 Indoor Air Quality Monitor UART/PWM US$24.67 US$43.99 View It

Overall:

benjhm 18/10/2017

Eventually I got this working with my Raspberry Pi-0w, we can use this for teaching respiration etc. in schools, the quick response to perturbation is helpful. CO2 concentration as expected, but I didn't yet check quantitative accuracy. Need to solder pins but connects straight to pi serial uart, no extra interface needed, although pi serial config is tricky. You can find sample python codes on internet (but check carefully for characters lost on copy-paste). Seems robust, working non-stop for days.

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