#include <OneWire.h>
#include <DallasTemperature.h>

OneWire oneWire(10);
DallasTemperature sensor(&oneWire);
const int RELAY_PIN  = 3; 
float tempCelsius;    
float tempFahrenheit; 
void setup(void) {
  Serial.begin(115200);
 // delay(2);
  sensor.begin();
 // delay(20);
  pinMode(RELAY_PIN, OUTPUT); 
}

void loop(void) { 
 sensor.requestTemperatures();             
  tempCelsius = sensor.getTempCByIndex(0); 
  tempFahrenheit = tempCelsius * 9 / 5 + 32; 

  Serial.print("Temperature: ");
  Serial.print(tempCelsius);    
  Serial.print("°C");
  Serial.print("  ~  ");        
  Serial.print(tempFahrenheit); 
  Serial.println("°F");
if (tempCelsius >= 90) {
    Serial.println("Temperature exceeds...Opening the valve...");
   digitalWrite(RELAY_PIN, HIGH);
  }
  else
  if (tempCelsius <90) {
    Serial.println("Temperature under control....");
    digitalWrite(RELAY_PIN, LOW);  
 }
}