#include <SoftwareSerial.h>
int bluetoothTx = 10;  // TX-O pin of bluetooth
int bluetoothRx = 11;  // RX-I pin of bluetooth
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup(){
  Serial.begin(9600);  // Begin the serial monitor at 9600bps
  delay(200);
  bluetooth.begin(9600);  // Start bluetooth serial at 9600
  Serial.print("send...");
  bluetooth.print("AT");
    bluetooth.print("110"); //open relay 1
    delay(2000);
  bluetooth.print("100"); //close relay 1
}
void loop(){
  if(bluetooth.available()){
    Serial.print((char)bluetooth.read());
  }
  if(Serial.available()){
    bluetooth.print((char)Serial.read());
  }
}