programming arduino

[SArioDabidG.]

Here's my code that uses millis() function to generate delay:

Code: [Select]


  const int ledPin = 13;  // the pin that the LED is attached to
  int serialValue=0;      // variable to hold your serial data
 
  long interval = 3000;   // time in 3seconds
  long previousMillis = 0;  // will store last time

// setup is executed once
void setup()
{
  // initialize serial communication:
  Serial.begin(9600);
 
  // initialize the ledPin as an output:
  pinMode(ledPin, OUTPUT);
 
  // ledPin13 is off first
  digitalWrite(ledPin,LOW);
}

// loop is always running
void loop()
{
  // if data is received in serial buffer register
  if (Serial.available() > 0)
  {
    // read the data and save to a variable
    serialValue = Serial.read();
   
    // parse the data
   
    // if '1' is read
    if(serialValue == '1')
    {
      // activate led on arduino Pin13
      digitalWrite(ledPin,HIGH);   
     
        // implement 3s delay using timer module
       
        // save time to a variable
        unsigned long currentMillis = millis();
       
        // check the time if greater the 3s
        if(currentMillis - previousMillis > interval)
        {
          // update time
          previousMillis = currentMillis;   

          // clear buffer register and data variable
          Serial.flush();
          // turn off led
          serialValue = '0';
       
        }
    }
   
    // if '0' is received
    if(serialValue == '0')
    {
      // turn led off on arduino Pin13
      digitalWrite(ledPin,LOW);   
   
    }
   
  }
}


Heres another code using delay function:

Code: [Select]


  const int ledPin = 13;  // the pin that the LED is attached to
  int serialValue=0;      // variable to hold your serial data
 
  long interval = 3000;   // time in 3seconds
  long previousMillis = 0;  // will store last time

// setup is executed once
void setup()
{
  // initialize serial communication:
  Serial.begin(9600);
 
  // initialize the ledPin as an output:
  pinMode(ledPin, OUTPUT);
 
  // ledPin13 is off first
  digitalWrite(ledPin,LOW);
}

// loop is always running
void loop()
{
  // if data is received in serial buffer register
  if (Serial.available() > 0)
  {
    // read the data and save to a variable
    serialValue = Serial.read();
   
    // parse the data
   
    // if '1' is read
    if(serialValue == '1')
    {
      // activate led on arduino Pin13
      digitalWrite(ledPin,HIGH);   
     
        // implement 3s delay
        delay(3000);
       
          // clear buffer register and data variable
          Serial.flush();
          // turn off led
          serialValue = '0';
 
    }
   
    // if '0' is received
    if(serialValue == '0')
    {
      // turn led off on arduino Pin13
      digitalWrite(ledPin,LOW);   
   
    }
   
  }
}