Kontrol Relay daribluetooth

// 2017
// Kontrol Relay dari bluetooth

const int relayPin = 3; // Tentukan Pin Digital Relay
int state;             // Status terakhir dari serial port
int flag;              // flag o/off;)


void setup()
{
  pinMode(relayPin, OUTPUT);  // Tentukan Pin Output
    Serial.begin(9600);       // Set baud rate serial
}

void loop()
{
    if(Serial.available() > 0){
      state = Serial.read();    // simpan data serial di variabel state
    }

 if( state == '1' )               // jika ata 1 maka aktifkan relay /Charging
  {
    digitalWrite(relayPin, HIGH);
  }

  if( state == '0' )              // if 0 Nonaktifkan Relay/Stop Charging
  {
    digitalWrite(relayPin, LOW);
  }
}