#include <SoftwareSerial.h>

const int node_id = 1;
int b1,b2=0,b3=0,b4=0;  //framing bits
int id_read = 0;
SoftwareSerial mySerial(3, 4); // RX, TX

int red_pin = 0;
int green_pin = 1;
int blue_pin = 2;
int red_duty = 0; //duty cycle of leg pins of 255
int green_duty = 0;
int blue_duty = 0;

void setup(){
  mySerial.begin(9600); 
  pinMode(red_pin,OUTPUT); //set up led pins as outputs
  pinMode(green_pin,OUTPUT);
  pinMode(blue_pin,OUTPUT);
}

void read_duties(){
  while(mySerial.available()==0);id_read = mySerial.read();
  if (id_read == node_id){
    while(mySerial.available()==0);red_duty=mySerial.read();
    while(mySerial.available()==0);green_duty=mySerial.read();
    while(mySerial.available()==0);blue_duty=mySerial.read();
  }
}


void loop(){  
  for(int j=0; j<255; ++j){
    if(j>=red_duty){
      digitalWrite(red_pin,HIGH);
    }
    else{
      digitalWrite(red_pin,LOW);
    }
    if(j>=green_duty){
      digitalWrite(green_pin,HIGH);
    }
    else{
      digitalWrite(green_pin,LOW); 
    }
    if(j>=blue_duty){
      digitalWrite(blue_pin,HIGH);
    }
    else{
      digitalWrite(blue_pin,LOW);      
    }
    if(mySerial.available()!=0){
      b1=b2; b2=b3; b3=b4;
      b4 = mySerial.read();
      if(b1==1 && b2==2 && b3==3 && b4==4){
        read_duties();
      }
    }
  }
}