Formatted output

Generating formatted output with sprintf(), snprintf() and dtostrf() is convenient and simple. I will explain the various options as well as the pitfalls.

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MH-Z14 and MH-Z19 CO2 Sensors

With CO2 sensors of the MH-Z14 and MH-Z19 series you can monitor the indoor air quality. I show how you how to control the sensors and I check their accuracy.

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