init
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co2.ino
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46
co2.ino
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#include <Arduino.h>
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#include "MHZ19.h"
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#define RX_PIN 0 // Rx pin which the MHZ19 Tx pin is attached to
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#define TX_PIN 1 // Tx pin which the MHZ19 Rx pin is attached to
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#define BAUDRATE 9600 // Device to MH-Z19 Serial baudrate (should not be changed)
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MHZ19 myMHZ19; // Constructor for library
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unsigned long getDataTimer = 0;
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void setup()
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{
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Serial.begin(9600); // Device to serial monitor feedback
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Serial1.begin(BAUDRATE); // (Uno example) device to MH-Z19 serial start
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// myMHZ19.printCommunication(false, true);
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myMHZ19.begin(Serial1); // *Serial(Stream) refence must be passed to library begin().
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myMHZ19.autoCalibration(); // Turn auto calibration ON (OFF autoCalibration(false))
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}
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void loop()
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{
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if (millis() - getDataTimer >= 2000)
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{
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int CO2;
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/* note: getCO2() default is command "CO2 Unlimited". This returns the correct CO2 reading even
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if below background CO2 levels or above range (useful to validate sensor). You can use the
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usual documented command with getCO2(false) */
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CO2 = myMHZ19.getCO2(); // Request CO2 (as ppm)
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Serial.print("CO2 (ppm): ");
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Serial.println(CO2);
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int8_t Temp;
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Temp = myMHZ19.getTemperature(); // Request Temperature (as Celsius)
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Serial.print("Temperature (C): ");
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Serial.println(Temp);
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getDataTimer = millis();
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}
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}
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