/*
  Button

  Turns on and off a light emitting diode(LED) connected to digital pin 13,
  when pressing a pushbutton attached to pin 2.

  The circuit:
  - LED attached from pin 13 to ground
  - pushbutton attached to pin 2 from +5V
  - 10K resistor attached to pin 2 from ground

  - Note: on most Arduinos there is already an LED on the board
    attached to pin 13.

  created 2005
  by DojoDave <http://www.0j0.org>
  modified 30 Aug 2011
  by Tom Igoe

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/Button

  Modified by Salama for Fab Academy 2018, Network and communication week. Changed pins and add serial
*/

#include <SoftwareSerial.h>
   
const int ledPin =  7;       // the number of the LED pin
const int buttonPin = 3;    // the number of the pushbutton pin
SoftwareSerial myserial(6,5);     //Rx,Tx

int buttonState = 0;      // variables will change:
char value  = 0;      // variable for reading the pushbutton status
char address = '4';      // defining the address of the slave 

void setup() {
  
  pinMode(ledPin, OUTPUT);    // initialize the LED pin as an output:
  pinMode(buttonPin, INPUT_PULLUP); // initialize the pushbutton pin as an input:
 
    myserial.begin(9600);   //Initialize serial communication at baud rate of 9600
}

void loop() {

 digitalWrite(ledPin, HIGH);
  char value= myserial.read();    // Read serial port 
  if (value == address)     // check if received number 3 
  {
     digitalWrite(ledPin, HIGH);  //Turn the LED on 
     delay(500);
    }

  buttonState = digitalRead(buttonPin);   // read the state of the pushbutton value:

  
  if ( buttonState== LOW) {   // check if the pushbutton is pressed. If it is, the buttonState is LOW
  myserial.write('2');      // send 2 to slave
  delay(500);       
  } 
  
  else {
    delay(100);
  }
}