Program arduino untuk mengatur dua LED

ardudroid1.ino

/*
 PROJECT: ArduDroid 
 PROGRAMMER: Hazim Bitar (techbitar at gmail dot com)
 DATE: Oct 31, 2013
 FILE: ardudroid.ino
 LICENSE: Public domain
 
 diedit pada tanggal : 24-03-2014 / 28-04-2014
*/

#include <LiquidCrystal.h>;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

#define START_CMD_CHAR '*'
#define END_CMD_CHAR '#'
#define DIV_CMD_CHAR '|'
#define CMD_DIGITALWRITE 10
#define CMD_ANALOGWRITE 11
#define CMD_TEXT 12
#define CMD_READ_ARDUDROID 13
#define MAX_COMMAND 20  // max command number code. used for error checking.
#define MIN_COMMAND 10  // minimum command number code. used for error checking. 
#define IN_STRING_LENGHT 40
#define MAX_ANALOGWRITE 255
#define PIN_HIGH 3
#define PIN_LOW 2

String inText;

void setup() {
  Serial.begin(9600);
  Serial.println("ArduDroid 0.12 Alpha by TechBitar (2013)");
  Serial.flush();
 }

void loop()
{
  Serial.flush();
  int ard_command = 0;
  int pin_num = 0;
  int pin_value = 0;
  char get_char = ' ';  //membaca nilai serial 
  
  if(isPlay){
    loopsong();
    isPlay=false;
  }

  //Menunggu data masukan 
  if (Serial.available() < 1) return; // if serial empty, return to loop().

  // melakukan pemilihan data masukan 
  get_char = Serial.read();
  if (get_char != START_CMD_CHAR) return; // if no command start flag, return to loop().

  // memilih tipe data masukan 
  ard_command = Serial.parseInt(); // read the command
  
  // parse incoming pin# and value  
  pin_num = Serial.parseInt(); // read the pin
  pin_value = Serial.parseInt();  // read the value

  // 1) Mendapatkan perintah berupa text
  if (ard_command == CMD_TEXT){   
    inText =""; //clears variable for new input   
    while (Serial.available())  {
      char c = Serial.read();  //Membaca satu byte dari serial 
      delay(5);
      if (c == END_CMD_CHAR) { // Mengakhiri pembacaan 
        
        lcd.clear(); //menghapus seluruh tulisan pada LCD
        lcd.setCursor(0,0); // meletakkan cursor pada koordinat 0,0
        lcd.print(inText); // mencetak text masukan 
        break;
      }              
      else {
        if (c !=  DIV_CMD_CHAR) {
          inText += c; 
          delay(5);
        }
      }
    }
  }

  // 2) Membaca masukan data digital 
  if (ard_command == CMD_DIGITALWRITE){  
    if (pin_value == PIN_LOW) pin_value = LOW;
    else if (pin_value == PIN_HIGH) pin_value = HIGH;
    else return;
    return;  // Kembali ke loop utama jika tidak ada masukan data
  }

  // 3) Membaca masukan data analog
  if (ard_command == CMD_ANALOGWRITE) {  
    analogWrite(  pin_num, pin_value ); 
 
    return; 
  }

  // 4)Mengirim data ke ardudroid
  if (ard_command == CMD_READ_ARDUDROID) { 
   
    Serial.print(" Analog 0 = "); 
    Serial.println(analogRead(A0));  // contoh : mengirimkan data pembacaan pin analog 0
    return;  // kembali ke loop utama 
  }
}

// 2a) mengubah nilai pin digital
void set_digitalwrite(int pin_num, int pin_value)
{
  switch (pin_num) {
  case 13:
    pinMode(13, OUTPUT);
    digitalWrite(13, pin_value);  
         
    break;
  case 12:
    pinMode(12, OUTPUT);
    digitalWrite(12, pin_value); 
    break;
  case 11:
    pinMode(11, OUTPUT);
    digitalWrite(11, pin_value);   
    break;
  case 10:
    pinMode(10, OUTPUT);
    digitalWrite(10, pin_value);    
    break;
  case 9:
    pinMode(9, OUTPUT);
    digitalWrite(9, pin_value);     
    break;
   
  case 8:
    pinMode(8, OUTPUT);
    digitalWrite(8, pin_value);
    isPlay=true;    
    break;
  case 7:
    pinMode(7, OUTPUT);
    digitalWrite(7, pin_value);       
    break;
  case 6:
    pinMode(6, OUTPUT);
    digitalWrite(6, pin_value);        
    break;
  case 5:
    pinMode(5, OUTPUT);
    digitalWrite(5, pin_value); 
    break;
  case 4:
    pinMode(4, OUTPUT);
    digitalWrite(4, pin_value);        
    break;
  case 3:
    pinMode(3, OUTPUT);
    digitalWrite(3, pin_value);        
    break;
  case 2:
    pinMode(2, OUTPUT);
    digitalWrite(2, pin_value); 

    break;      
  } 
  
}