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GenericLab / CO2-soil-respiration-chamber

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Add a CO2 sensor calibration routine #2

Closed nanocastro closed 11 months ago

nanocastro commented 1 year ago

CO2 sensors are usually calibrated in an open environment atmosphere and the co2 concentration is supposed to be 400ppm. We don't need a precise absolute value because in respiration we are looking at relative values but we need to think of a way to enter calibration mode (extra button...?) and a protocol. I think the easiest solution is to enter calibration mode and then put all sensors at once in free air for a while (5min/10 mins) and then store the last value (or make a median of the few last values)

MaximilianoGarcia716 commented 1 year ago

The calibration routine is ready, it is entered when push the calibration button and use the calibration algorithm suggested by the datasheet

MaximilianoGarcia716 commented 11 months ago

Can be seen resolved in CO2-soil-respiration-chamber/software/ESP32-S2/WEMOS-lolin32_Multiplexing_SCD41/