//  Week 15 - Networking and Communications
//  Atmega328P board as Arduino/Genuino Uno
//  Network node 3
//
//  Author: Jari Uusitalo
//  Modified by Kati Pitkänen on 31.05.2018
//  BRIDGE Board for Networking

#include <SoftwareSerial.h>

#define txPin A1                        // A1 transmits signal from the Bridge board
#define rxPin A2                        // A1 recieves signal from the NODE boards

int incomingbyte;                       // For incoming serial data
int ledPin = 13;                        // LED pin to light up a LED if node board is responding

SoftwareSerial mySerial(rxPin, txPin);  // Set up Serial Port RX, TX

void setup()
{
  pinMode(ledPin, OUTPUT);              // Green LED is in output pin 13

  Serial.begin(9600);                   // Open Serial communication via FTDI-cable between Bridge and computer
  mySerial.begin(9600);                 // Start Serial between NODEs and Bridge (data rate to 9600 bits per second)
}

void loop() {
  while ( Serial.available()){
    incomingbyte = Serial.read();       // Read the incoming byte
    
    Serial.write(incomingbyte);
    Serial.print(" *NODE: ");
    Serial.print((char)incomingbyte);
    Serial.println(" is responding ");
   
    mySerial.write(incomingbyte);

              digitalWrite(ledPin, HIGH);   // Blink the green LED as a sign that the request is received
              delay(1000);
              digitalWrite(ledPin, LOW);
              delay(500);
              digitalWrite(ledPin, HIGH);
              delay(500);
              digitalWrite(ledPin, LOW);
              delay(500);
              digitalWrite(ledPin, HIGH);
              delay(200);
              digitalWrite(ledPin, LOW);  
    }
}