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README.md
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README.md
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@ -4,6 +4,20 @@ Arduino implementation for MH-Z CO2 sensors such as **MH-Z14A**, **MH-Z18B** (as
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The sensor is available for ~20 bucks at the usual places.
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## Implementation
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See example.
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> PPMuart: 602, PPMpwm: 595, Temperature: 23
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### Implementation details
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```
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C ppm = 5000 * (T_high - 2 ms) / (T_high + T_low - 4ms)
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```
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The implementation is mostly based on https://forum.arduino.cc/index.php?topic=525459.msg3587557#msg3587557
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## Resources:
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Datasheet:
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@ -13,15 +27,6 @@ More info about the sensor:
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https://revspace.nl/MHZ19
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## Implementation
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```
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C ppm = 5000 * (T_high - 2 ms) / (T_high + T_low - 4ms)
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```
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The implementation is mostly based on https://forum.arduino.cc/index.php?topic=525459.msg3587557#msg3587557
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## Further reading:
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- http://ihormelnyk.com/Page/mh-z19_co2_meter
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