#include <SoftwareSerial.h> 
SoftwareSerial QuartzBT(10, 11); //RX |TX
int LED-7;
int val;
void setup()
{
 Serial.begin(9600); 
 QuartzBT.begin(9600);
 Serial.println("The bluetooth gates are open in Connect to HC-05 from any other bluetooth
device with 1234 as pairing key!.");
 pinMode(LED. OUTPUT);
}
void loop()
{
 if (QuartzBT.available())
{
 val=QuartzBT.read();
 if (val=='1') 
{
 digitalWrite(LED, 1);
 QuartzBT.println("LED On D07 ON!");
}
else if (val=='0')
{
 digitalWrite(LED, 0);
  QuartzBT.println("LED On D07 Off!");
}
else QuartzBT.println("Enter 0 for off or 1 for on :");
}
}