#define ADC_IN A5
#define ADC_REF 3.3



unsigned char RED_LED = 23;

unsigned char YEL_LED = 19;

unsigned char GRE_LED = 18;

char PB_GREEN = 27;
char PB_BLUE = 25;


void setup() {
  pinMode(RED_LED, OUTPUT);
  pinMode(YEL_LED, OUTPUT);
  pinMode(GRE_LED, OUTPUT);
 
 Serial.begin(115200);
}

void loop() {
  //PUT YOUR MAIN CODE HERE, TO RUN REPEATEDLY:
  //READING THE OUTPUT OF ADC
  int val_ADC;
  val_ADC = analogRead(ADC_IN);

  // PRINT THE VALUE OUT
  Serial.print("ADC value = ");
  Serial.println(val_ADC, DEC);
  delay(10);

  float voltage;

  voltage = (val_ADC/4095.0) * ADC_REF;
  Serial.print("Voltage = ");
  Serial.println(voltage, DEC);

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

}