/*
 * When the it recive 1  from the master it will turn OFF the LED if it recive 0 it will turn ON. 
 * Made by Eidha alrashdi and edited 
 * fabacadmy2018
 *20/6/2018
 * Edited by Danny Vallejo fab academy 27/04/2019
 * 
 */
#include<SoftwareSerial.h>// add serial library
int rxPin = 1;// the receiver will be in pin 1
int txPin = 0;// the sender will be in pin 0
char val = 'd';// defining that val is equal to 1
SoftwareSerial myserial(rxPin, txPin);// defin the serial and indecate the ports.

void setup() {
  myserial.begin(9600);

  pinMode(8, OUTPUT);// pin 8 is the LED
}

void loop()
{
  char chr = myserial.read();// chr equal whatever the serial read from the master

  if (chr == val) {// here I'm saying if the serial read a valuy equal to what val is, turn LED ON and send that it receive
    digitalWrite(8, HIGH);
    myserial.write("atmega_receive");// slave 2 confirming reciving from master.
    
    delay(500);// I made it half second to see the process also less than the other slave to not send to the master at the same time.
  }
  else {
    digitalWrite(8, LOW);// if it didnt receive 0 so it will turn ON LED
    
  }
}