<const int sensorPin = A0;
const float baslineTemp = 20.0;
void setup() {
Serial.begin(9600); //open a serie port
for(int pinNumber = 2; pinNumber<5; pinNumber++){
pinMode(pinNumber, OUTPUT);
digitalWrite(pinNumber, LOW);
}
}
void loop(){
int sensorVal = analogRead(sensorPin);
Serial.print ("Sensor Value: ");
Serial.print(sensorVal);
// Convert the ADC reading to Voltage
float voltage = (sensorVal/1024.0) * 5.0;
Serial.print(", Volts: ");
Serial.print (voltage);
Serial.print(", degree C: ");
//convert Voltage to temp in degrees
float temperature = (voltage - .5) * 100;
Serial.println (temperature);
if(temperature < baselineTemp){
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
}else if(temperature >= baseline +2 &&
temperature < basline+4){
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} else if(temperature >= baselinetemp+4 &&
temperature < baseline Temp +6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
}else if(temperature >= baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
}
delay(1);
}