#include <SoftwareSerial.h>

SoftwareSerial bluetooth(10, 11); // RX, TX
int a1 = 6;
int a2 = 5;

String receivedBluetoothString = "";

void setup() {
  bluetooth.begin(9600);
  pinMode(a1, OUTPUT);
  pinMode(a2, OUTPUT);
}

void loop() {
  while (bluetooth.available() > 0) {

    char receivedBluetoothChar = bluetooth.read();
    receivedBluetoothString += receivedBluetoothChar;

    if (receivedBluetoothChar == '\n') {

      if (receivedBluetoothString.toInt() == 887425) {
        digitalWrite(a1, HIGH);
        delay(500);
        digitalWrite(a1, LOW);
      } else if (receivedBluetoothString.toInt() == 887426) {
        digitalWrite(a1, HIGH);
        delay(1000);
        digitalWrite(a1, LOW);
      }

      receivedBluetoothString = "";
    }
  }
}