#define OnBoardLED 13
#define RELAY1 12
#define RELAY2 11
unsigned char Cx=0;
unsigned long PrevTime,NowTime;
byte myChar = '0';
float Num1 = 0.5643899999;
void setup() {
  pinMode(OnBoardLED, OUTPUT);
  pinMode(RELAY1, OUTPUT);
  pinMode(RELAY2, OUTPUT);
  Serial.begin(9600);
  Serial.println("็Hello ENE of RMUTI Khonkaen");
  Serial.println(Num1,3);
}

void loop() 
{
  NowTime = millis();
  if(NowTime >= (PrevTime + 100))
  {
    if(Cx==0) digitalWrite(OnBoardLED, HIGH);
    else if(Cx==3) digitalWrite(OnBoardLED, LOW);

   if(Cx == 9)
   {
     Cx = 0;    
   }else Cx++;
   PrevTime = NowTime;
  }
}

byte rxBuff[12];
void RelayControl(void)
{
  if((rxBuff[0] == 'R') && (rxBuff[1] == 'Y'))
  {
     if(rxBuff[2] == '0')
     {
       //-------- CH01---------
          if(rxBuff[3] == '1')
          {
              if(rxBuff[4] == 'N') digitalWrite(RELAY1,HIGH);
              else if(rxBuff[4] == 'F') digitalWrite(RELAY1,LOW);
          }
         //-------- CH02---------
          if(rxBuff[3] == '2')
          {
              if(rxBuff[4] == 'N') digitalWrite(RELAY2,HIGH);
              else if(rxBuff[4] == 'F') digitalWrite(RELAY2,LOW);
          }
     }
  }
}

byte rxCount = 0;
void serialEvent() 
{
  while(Serial.available()) 
  {
    // get the new byte:
   rxBuff[rxCount] = Serial.read();
   Serial.write(rxBuff[rxCount]);
   Serial.println("|"  + String(rxCount));
   if(rxBuff[0] == 'R')
   {     
     if((rxCount == 5) || (rxBuff[rxCount] == '#'))
     {
       rxCount = 0;
       RelayControl();
       Serial.println("OK-PASS");
     }else rxCount++;
   }   
  }
}