//  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
//  ATmega328 board, 16 Mhz external clock, Network BRIDGE

#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 myincomingbyte;                     // For incoming mySerial 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.println((char)incomingbyte);
   
    mySerial.write(incomingbyte);
    }
    
    while ( mySerial.available()){
      
    myincomingbyte = mySerial.read();    // Read the incoming byte
    Serial.write(myincomingbyte);         

    if(myincomingbyte == 'L') {          // If the mySerial line returns a certain value L/M/H, do as follows
    Serial.print(". The value ");  
    Serial.print((char)incomingbyte);
    Serial.println(" means that it is BRIGHT.");
    
    }
     else if(myincomingbyte == 'M') {    // (Voltage consumption between two threshold values, the incoming byte is M = Medium)
    Serial.print(". The value ");
    Serial.print((char)incomingbyte);
    Serial.println(" means that it is SEMIBRIGHT.");

    }
     else if(myincomingbyte == 'H') {    // (Voltage consumption increases in the dark, the incoming byte is H = High)
    Serial.print(". The value ");  
    Serial.print((char)incomingbyte);
    Serial.println(" means that it is DARK.");
    
    }
    }
}