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watterott / CO2-Ampel

CO2-Ampel / CO2-Traffic-Light to measure and show the carbon dioxide concentration in a room, based on Sensirion SCD30/SCD4x sensor and Microchip SAMD21 microcontroller
https://learn.watterott.com/breakouts/co2-ampel/
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firmware v7 wrongly calibrated #1

Closed ernstkl closed 3 years ago

ernstkl commented 3 years ago

Hello,

the firmware v7 displays a CO2 ppm value of ca. 220 ppm in a well ventilated office. This is not plausible as fresh air has about 400 ppm CO2. Doing the check outside, the ppm value drops to zero.

This looks like a wrong calibration to me. According to the readme, doing a calibration usually is not required.

ernstkl commented 3 years ago

need to check, maybe we miscalibrated ourselves, sorry.

awatterott commented 3 years ago

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