bluetooth.ino

#define DEBUG true
#define DEBUG_SERIAL Serial
#define BLUETOOTH true
#define BLUETOOTH_SERIAL Serial3

#define START_MARKER '<'
#define END_MARKER '>'

// Befehle für serielle Kommunikation (NICHT VERÄNDERN):
#define debug(_str_); if(DEBUG){DEBUG_SERIAL.print(_str_);}
#define debugln(_str_); if(DEBUG){DEBUG_SERIAL.println(_str_);}
#define bluetooth(_str_); if(BLUETOOTH){BLUETOOTH_SERIAL.print(START_MARKER);BLUETOOTH_SERIAL.print(_str_);BLUETOOTH_SERIAL.print(END_MARKER);}
// ---

#define LED 13
#define BUTTON A0

String message;
String command;
bool  isListening = false;
bool isButton = false;
bool lastButton = false;
bool isLed = false;

void setup() {
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT_PULLUP);
  DEBUG_SERIAL.begin(9600);
  debugln("RESTART");
  BLUETOOTH_SERIAL.begin(38400);
  bluetooth("IR:available");
}
void loop() {
  digitalWrite(LED, isLed);
  isButton = !digitalRead(BUTTON);

  // bluetooth senden
  if (isButton != lastButton) {
    bluetooth("h");
  }

  // bluetooth auslesen
  command = receiveBluetooth();
  if (command != "") {
    //debugln("[" + (String)millis() + "] " + (String)command);
    if (command == "h") {
      isLed = !isLed;
    }
  }
  lastButton = isButton;
}

String receiveBluetooth() {
  if (BLUETOOTH_SERIAL.available() > 0) {
    char c = BLUETOOTH_SERIAL.read();
    if ( isListening) {
      if (c == START_MARKER) {
        message = "";
      } else if (c == END_MARKER) {
        isListening = false;
        return (message);
      } else {
        message += c;
      }
    } else {
      if (c == START_MARKER) {
        message = "";
        isListening = true;
      }
    }

  }
  return ("");
}