/*
This code was modified by Georges Hanna Fab Academy 2018,NETWORKING AND COMMUNICATIONS

The code was modified Based on the below codes :
https://forum.arduino.cc/index.php?topic=386
https://maker.pro/arduino/tutorial/how-to-make-arduino-and-processing-ide-communicate
*/


#include <SoftwareSerial.h>   //Include the software serial library in the sketch 
#define RxD 2  // Assign pin#2 on Attiny44 to be RX for receiving data ( This pin should be connected with the TX pin on  Bluetooth module)
#define TxD 1 // Assign pin#1 on Attiny44 to be TX for sending data( This pin should be connected with the RX pin on  Bluetooth module)
int LED = 7; // The led light is connected to Attiny44 pin # 7 
SoftwareSerial BluetoothSerial(RxD, TxD);

void setup() {
    BluetoothSerial.begin(9600); // Begin the bluetooth and set BaudRate to 9600
    pinMode(LED,OUTPUT); 
    
    pinMode(TxD, OUTPUT); // Telling Attiny44 to use TxD pin as an output
    pinMode(RxD, INPUT);  // Telling Attiny44 to use RxD pin as an input  
}

void loop() {

  BluetoothSerial.println(0); // Typing 0 every 6 seconds & this number will be sent to processing  
  delay(3000); // Delay for 6 seconds 
char recvChar; // Define char datatype for reciving value from the blutooth device 
if(BluetoothSerial.available()){   //(If the connection is available
  recvChar = BluetoothSerial.read(); //Read the incoming data from processing  
  if(recvChar == '1') // If the received data is 1 blink the led light
  {
          digitalWrite(LED,HIGH); // Turn on the led for half second  
          delay (500);
          digitalWrite(LED,LOW); // Turn off the led for half second 
          delay (500);
  
}
}
}