#include <Wire.h>
#include "SparkFun_SCD30_Arduino_Library.h"
#include "LiquidCrystal_I2C.h"
#define LED_PIN3
/*int ledR =2;
int ledO =4;
int ledV =5;*/
int ledR =5; 
int ledO =18;
int ledV =19;
SCD30 airSensor;

void setup()
{
Serial.begin(9600);
Serial.println("SCD30 Example");
Wire.begin();
if (airSensor.begin() == false)
{
Serial.println("Air sensor not detected. Please check wiring. Freezing...");
while (1)
;
}
pinMode(ledR, OUTPUT);
pinMode(ledO, OUTPUT);
pinMode(ledV, OUTPUT);
}
void loop()
{
int taux_co2;
if (airSensor.dataAvailable())
{
taux_co2 = (int)airSensor.getCO2();
Serial.print("co2(ppm):");
Serial.print(taux_co2);
Serial.print(" temp(C):");
Serial.print(airSensor.getTemperature(), 1);
Serial.print(" humidity(%):");
Serial.print(airSensor.getHumidity(), 1);
Serial.println();
if (taux_co2 < 800){
digitalWrite(ledV,HIGH);
digitalWrite(ledO,LOW);
digitalWrite(ledR,LOW);
}
else if (taux_co2 >= 800 && taux_co2 < 1000){
digitalWrite(ledO,HIGH);
digitalWrite(ledV,LOW);
digitalWrite(ledR,LOW);
}
else if (taux_co2 >= 1000){
digitalWrite(ledR,HIGH);
digitalWrite(ledO,LOW);
digitalWrite(ledV,LOW);
}
}
delay(500);
}