int a=0;//ldr store
int b=0;//temperature store
const float BETA = 3950;
void setup() {
  Serial.begin(9600);

  pinMode(26,INPUT);//ldr
  pinMode(27,INPUT);//temperature sensor
  pinMode(19,OUTPUT);//grow light
  pinMode(17,OUTPUT);//water pump
}

void loop() {
  
  digitalWrite(17,1);
  a=analogRead(26);
  Serial.println(a);
  if(a>800){
    digitalWrite(19,1);
  }
  else{
      digitalWrite(19,0);
  }
  b=analogRead(27);
  float celsius = 1 / (log(1 / (1023. / b - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  delay(1000);
  
  

}