Thank you for the good information. I have a question.

[rimmomo]

I'm using my hardware. (ESP32) How do I set the range?

include

HardwareSerial mhz19(1); MHZ19 mhz(&mhz19);

void setup() { Serial.begin(9600); delay(800); mhz19.begin(9600);

 mhz.setAutoCalibration(false);
 mhz.setRange(3);

}

void main() { MHZ19_RESULT response = mhz.retrieveData(); if (response == MHZ19_RESULT_OK) { Serial.print(F("CO2: ")); Serial.println(mhz.getCO2()); Serial.print(F("Temperature: ")); Serial.println(mhz.getTemperature()); Serial.print(F("Accuracy: ")); Serial.println(mhz.getAccuracy()); } else { Serial.print(F("Error, code: ")); Serial.println(response); } }

I'm a beginner, so I don't know. Thank you for the good information.

[strange-v]

What range value do you want to set? In any case, you have to use enum defined in MHZ19.h, e.g. for range 3000 ppm code will be like this: mhz.setRange(MHZ19_RANGE_3000);

This is the list of valid ranges: MHZ19_RANGE_1000, MHZ19_RANGE_2000, MHZ19_RANGE_3000, MHZ19_RANGE_5000, MHZ19_RANGE_10000

[rimmomo]

What range value do you want to set? In any case, you have to use enum defined in MHZ19.h, e.g. for range 3000 ppm code will be like this: mhz.setRange(MHZ19_RANGE_3000);

This is the list of valid ranges: MHZ19_RANGE_1000, MHZ19_RANGE_2000, MHZ19_RANGE_3000, MHZ19_RANGE_5000, MHZ19_RANGE_10000

Thank you!