#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); // RX, TX

int val;
int LED1 = 9;
int LED2 = 10;
int LED3 = 11;
int LED4 = 12;
void setup()
{
  mySerial.begin(38400);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
  digitalWrite(LED4, LOW);
}
void loop()
{
  if (mySerial.available())
  {
    val = mySerial.read();
    if (val == '1'){digitalWrite(LED1, HIGH);}
    if (val == '2'){digitalWrite(LED1, LOW);}

    if (val == '3'){digitalWrite(LED2, HIGH);}
    if (val == '4'){digitalWrite(LED2, LOW);}

    if (val == '5'){digitalWrite(LED3, HIGH);}
    if (val == '6'){digitalWrite(LED3, LOW);}

    if (val == '7'){digitalWrite(LED4, HIGH);}
    if (val == '8'){digitalWrite(LED4, LOW);}
  }
}