I did the modiications on the code:
char str[5] = "OK";
void setup ()
{
Serial.begin(9600);
Serial.print("+++");
delay(3000);
if((int)Serial.read()==(int)str){
Serial.println("ATPL");
delay(1000);
if(Serial.read()>=3){
Serial.println("ATPL 2");
delay(1000);
Serial.println("ATPL");
}
}
}
void loop ()
{
}
Still... Not working =/