//***********Protocol 12c***************
//PERIPHERAL BOARD 
//Original Code: Luis Alberto Hernández | Fab Lab Queretaro 
//Update Code: José Manuel Díaz  | Fab Lab Anáhuac Puebla 
//Fab Academy 2022
//SAMD 11C14A

#include  <Wire.h>//library for I2C

      byte own_address = 4; //set own adress.
      void setup()
      
     {
      Wire.begin(own_address); //enter the bus on specified address
      Wire.onReceive(receiveEvent);//set the board as reveicer and call a function called receiveEvent
      pinMode(2, OUTPUT);//set the pin of the led built in as an output
      pinMode(5,OUTPUT);//GREEN 
      pinMode(8,OUTPUT);//RED
      pinMode(9,OUTPUT); //BLUE
                    
     digitalWrite(2, LOW);//set the led builtin as low in the begining of the code
     digitalWrite(5, LOW);//GREEN 
     digitalWrite(8, LOW);//RED
     digitalWrite(9, LOW);//BLUE            
     }//close void setup
     
     void loop() 
     { }
    
     void receiveEvent(int howMany)
     {
     while (Wire.available())
     {//while the serial comunication is available using the wire library
     char c = Wire.read();//use  character variable called "c" to store de value of the message sent from the host

//------------------------------------------------ ALLOFF ----------------        
                      if(c=='O')
                 {//check the condition if the variable "c" equals the character "O"
     digitalWrite(2, LOW);//set the led builtin as low in the begining of the code
     digitalWrite(5, LOW);//GREEN 
     digitalWrite(8, LOW);//RED
     digitalWrite(9, LOW);//BLUE
     digitalWrite(2,LOW);//Led PIN #2 LOW
                       }//close first if

//------------------------------------------------ GREEN ----------------      
     if(c=='G')
     {//check the condition if the variable "c" equals the character "G"
     digitalWrite(5, HIGH);//GREEN     
     }//close if
  
//------------------------------------------------ RED ----------------      
      if(c=='R')
      {//check the condition if the variable "c" equals the character "R"       
      digitalWrite(8, HIGH);//RED                     
      }//close if

//------------------------------------------------ BLUE ----------------      
      if(c=='B')
      {//check the condition if the variable "c" equals the character "B"          
      digitalWrite(9, HIGH);//BLUE                         
      }//close if
      
//-------------------------------------- LED PIN#2 HIGH ----------------            
                    
      if(c=='H')
      {//check the condition if the variable "c" equals the character "H"
      digitalWrite(2,HIGH);//if this is thruth then turn LED on
      }//close if

//--------------------------------------- LED PIN#2 LOW ----------------              
      else if(c=='L')             
      // {other whise check if the value of the variable "c" is equal to the character "L"
      digitalWrite(2,LOW);// if this condition is true then turn LED off
                      }//close if
                    }//close while