2019.03.13(am): Smart Farm Solenoid Nozzle Test using Arduino

unsigned long preMills = 0;
int sw = 10;  
int relay = 13;
 
int state = HIGH;    
int reading;         
int previous = LOW;
 
long time = 0;    
long debounce = 100; 
 

void setup() 
{
  pinMode(sw, INPUT_PULLUP);
  pinMode(relay, OUTPUT);
}

void loop() 
{
   unsigned long Mills = millis();
   reading = digitalRead(sw);
  
  if (reading == HIGH && previous == LOW && millis() - time > debounce) 
  {
      digitalWrite(13, LOW);   
      delay(10000); // 10초 on              
      digitalWrite(13, HIGH);    
      delay(10000); // 10초 off
      Mills = millis();
  }
  else
    {
      digitalWrite(13, HIGH);       // off     
   
    }       
    digitalWrite(relay, state);
 
     previous = reading;
  
}