LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
unsigned long time;
+int co2 = 0;
+int temp = 0;
int lastppm = 0;
{
time = millis();
measurement_t m = mhz19.getMeasurement();
+ co2 = m.co2_ppm;
+ temp = m.temperature;
Serial.print(time);
Serial.print(",");
- Serial.print(m.co2_ppm);
+ Serial.print(co2);
Serial.print(",");
- Serial.println(m.temperature);
+ Serial.println(temp);
- digitalWrite(led_red_pin, m.co2_ppm >= co2_alarm_thr);
- digitalWrite(led_yellow_pin, m.co2_ppm >= co2_warning_thr && m.co2_ppm < co2_alarm_thr);
- digitalWrite(led_green_pin, m.co2_ppm < co2_warning_thr);
+ digitalWrite(led_red_pin, co2 >= co2_alarm_thr);
+ digitalWrite(led_yellow_pin, co2 >= co2_warning_thr && co2 < co2_alarm_thr);
+ digitalWrite(led_green_pin, co2 < co2_warning_thr);
- if (m.co2_ppm >= co2_alarm_thr && lastppm < co2_alarm_thr) {
+ if (co2 >= co2_alarm_thr && lastppm < co2_alarm_thr) {
digitalWrite(buzzer_pin, HIGH);
delay(100);
digitalWrite(buzzer_pin, LOW);
digitalWrite(buzzer_pin, LOW);
}
- if (m.co2_ppm >= co2_warning_thr && lastppm < co2_warning_thr) {
+ if (co2 >= co2_warning_thr && lastppm < co2_warning_thr) {
digitalWrite(buzzer_pin, HIGH);
delay(500);
digitalWrite(buzzer_pin, LOW);
lcd.setCursor(0, 0);
lcd.print("CO2: ");
- lcd.print(m.co2_ppm);
+ lcd.print(co2);
lcd.print(" ppm ");
- lastppm = m.co2_ppm;
+ lastppm = co2;
delay(5000);
}