unsigned char RED_LED = 23;
unsigned char YELLOW_LED = 19;
unsigned char GREEN_LED = 18;

char pb_green = 27;
char pb_blue = 25;

//REF = reference

#define ADC_IN A5
#define ADC_REF 3.3

void setup() {
  pinMode(RED_LED, OUTPUT);
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);

  pinMode(pb_green, INPUT);
  pinMode(pb_blue, INPUT);

  Serial.begin(115200);
}

void loop() {
//Reading thw output of ADC

int val_ADC;
val_ADC = analogRead(ADC_IN);

//Print the value out
Serial.print("ADC Value =");
Serial.println(val_ADC, DEC);

// float is a real number
float voltage;
voltage = (val_ADC/4095.0) * ADC_REF;
Serial.print("voltage =");
Serial.println(voltage, DEC);

if( (val_ADC < 1000) ) 
  {
    digitalWrite(RED_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
  }

  else if ( (val_ADC >=1000) && (val_ADC <=3500) )
  {
    digitalWrite(RED_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
  }

  else 
  {
    digitalWrite(RED_LED, HIGH);
    digitalWrite(GREEN_LED, HIGH);
  }
delay(3000);




}