スケッチ: "Arduino LeonardoによるBluetoothシリアル制御のLチカ" Arduinoのシリアル通信 および Bluetoothによるシリアル通信などから制御可能。 (0 = LED消灯, 1 = LED点灯, 2 = お遊び) http://masanoriprog.blogspot.jp/2013/08/arduino-bluetooth-serial-led.html

arduino_bluetooth-serial_led.ino

#include <SoftwareSerial.h>

#define LED_PORT 13
#define BT_RX 11
#define BT_TX 10
// TX(RBT-001) <-> 11(Arduino)

#define PWM_WIDTH 500
// roop = 2ms

SoftwareSerial btSerial(BT_RX, BT_TX);

int mode = 0;
int flag1 = 0;
int flag2 = 100;

void setup()
{
  // Initialize LED port 
  pinMode(LED_PORT, OUTPUT);
  digitalWrite(LED_PORT, LOW);
  // Initialize internal serial port (with PC)
  Serial.begin(9600);
  // Initialize software serial port (with Bluetooth)
  btSerial.begin(9600);
}
void loop()
{
  char c;
  
  // Read from software serial port (with Bluetooth)
  if (btSerial.available()){
    c = btSerial.read();
    Serial.write( c );
  }

  // Read from internal serial port (with PC)
  if (Serial.available()){
    c = Serial.read();
    btSerial.write(c);
  }
  
  switch(c){
     case '0':
      Serial.write("Led = disabled\n");
      mode = 0;
      break;
    case '1':
      Serial.write("Led = enabled\n");
      mode = 1;
      break;
    case '2':
      Serial.write("Led = enabled (2)\n");
      mode = 2;
  }
  
switch(mode){
  case 0:
    digitalWrite(LED_PORT, LOW);
    break;
  case 1:
    digitalWrite(LED_PORT, HIGH);
    break;
  case 2:
    /* Omake (PWM-like) */
    if( flag1 < flag2 ){
      digitalWrite(LED_PORT, LOW);
    } else if (PWM_WIDTH < flag1){
       flag1 = 0; 
       flag2 += 10;
       if(PWM_WIDTH < flag2){
         flag2 = 0;
       }
    } else {
      digitalWrite(LED_PORT, HIGH);
    }
    flag1++;
    break;
  }
}