init

co2.ino

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