void setup() {
  pinMode(LED_BUILTIN, OUTPUT);

        Serial.begin(115200);
        delay(5000);

        if(psramInit()){
                Serial.println("\nThe PSRAM is correctly initialized");
        }else{
                Serial.println("\nPSRAM does not work");
        }

   int PSRAMSize = ESP.getFreePsram();
        Serial.println((String)"PSRAM Size available (bytes): " + PSRAMSize);
        Serial.println((String)"memoria libera " + ESP.getFreeHeap());

        int n_elements = 900000;
        char *str = (char *) ps_calloc(n_elements, sizeof(char)); //Create an array of n_elements null characters ('\0')
        for(int i = 0; i < 10;i+=3){
                str[i] = '4';
                str[i+1] = '2';
                str[i+2] = '_';
        }
        Serial.println(str);
       // memset(str, 0, 10000);
sprintf(str+strlen(str),"MEMORIA LIBERA=%s<br>%s<br>reset eth-%s<br>","20000","data e ora","1983");
strcat(str,"Espansioni F.S.=  ");
if(strstr(str, "MEMORIA LIBERA") != NULL){Serial.println("trova la frase nella stringa");}

int x ;
sprintf(str,"coglione");
 if ((strcmp(str,"coglione"))==0) Serial.println("sono uguali");//controlla preciso

Serial.println(str);

         PSRAMSize = ESP.getFreePsram();
        Serial.println((String)"PSRAM Size available (bytes): " + PSRAMSize);
  

   
    Serial.println(str);
     Serial.println((String)"memoria libera " + ESP.getFreeHeap());
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
  
}