void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("masukkan suhu :");
  pinMode(13, OUTPUT);
}
bool cond, eepromcond;
unsigned long tON, tOFF;
const long inON = 4500, inOFF=1500;
int suhu=20;
void loop() {
  if(Serial.available()>0){
    String str = Serial.readStringUntil('\n');
    str.trim();
    suhu = str.toInt();
    Serial.println("suhu sekarang :"+String(suhu));
  }
  if(suhu>14){
    if (millis() - tOFF >= inOFF) {
      if(cond == false){
        cond = true;
        eepromcond=true;
        digitalWrite(13, HIGH);
        tON = millis();
      Serial.print("millis:"+String(tON)+"\t");
        Serial.println(1);
      }
    } 
    if (millis() - tON >= inON) {
      if(cond==true){
        cond = false;
        digitalWrite(13, LOW);
        tOFF = millis();
        Serial.print("millis:"+String(tOFF)+"\t");
        Serial.println(2);
      }
    }
  }
  else if (suhu <= 9) {
    if(eepromcond == true){
      cond = false;
      eepromcond=false;
      digitalWrite(13, LOW);
      tOFF = millis();
      Serial.print("millis:"+String(tOFF)+"\t");
      Serial.println(3);
    }
  }
  else if ((suhu > 9 && suhu <= 14)) {
    if(eepromcond==true){
      if (millis() - tON >= inON) {
        if(cond == true){
          cond = false;
          digitalWrite(13, LOW);
          tOFF = millis();
          Serial.print("millis:"+String(tOFF)+"\t");
          Serial.println(4);
        }
      }
      if (millis() - tOFF >= inOFF) {
        if (cond == false) {
          cond = true;
          digitalWrite(13, HIGH);
          tON = millis();
          Serial.print("millis:"+String(tON)+"\t");
          Serial.println(5);
        }
      }
    }
  }
  //Serial.print("cond : ");Serial.println(cond);
}