Issue with access point esp8266 nodemcu

Projects Programming
1

Hi everyone, for days I've been trying to create an access point with an ESP8266 board, but I'm having upload problems with this code. When I upload 'simpler' codes to the board, everything works fine: it creates the access point, I connect via WiFi with my smartphone, and I can load the web page. However, when I upload 'more complex' codes like the one in question, it doesn't show me anything when I search for it with WiFi.

Initially, I thought it was a memory problem, so I inserted ESP.getFreeHeap to check if it was full, even though it's almost empty. I also tried flashing the board, but to no avail. Thanks to anyone who can help me.

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <EEPROM.h>

#define LED_PIN D3
#define RELAY_PIN D5
#define SENSOR_PIN A0

ESP8266WebServer server(80);

int t1 = 85;
int t2 = 20;
int v1 = 400;

void setup() {
  Serial.begin(115200);
  EEPROM.begin(12);
  t1 = EEPROM.read(0) << 8 | EEPROM.read(1);
  t2 = EEPROM.read(2) << 8 | EEPROM.read(3);
  v1 = EEPROM.read(4) << 8 | EEPROM.read(5);

  pinMode(LED_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(SENSOR_PIN, INPUT);

  WiFi.softAP("ESP8266 AP", "12345678");

  server.on("/", handleRoot);
  server.begin();
  Serial.print("Memoria heap libera: ");
  Serial.println(ESP.getFreeHeap());
}

void loop() {
  server.handleClient();

  int sensorValue = analogRead(SENSOR_PIN);
  if (sensorValue >= v1) {
    delay(t2);
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(RELAY_PIN, HIGH);
    delay(t1);
    digitalWrite(LED_PIN, LOW);
    digitalWrite(RELAY_PIN, LOW);
  }
}

void handleRoot() {
  String s = "<html><body>";
  s += "<form method='get' action='set'>";
  s += "Tempo di taglio: <input name='t1' length=12 value='" + String(t1) + "'><br>";
  s += "Ritardo cutoff: <input name='t2' length=12 value='" + String(t2) + "'><br>";
  s += "Media sensore: <input name='v1' length=12 value='" + String(v1) + "'><br>";
  s += "<input type='submit'></form></body></html>";
  server.send(200, "text/html", s);

  if (server.hasArg("t1") && server.hasArg("t2") && server.hasArg("v1")) {
    t1 = server.arg("t1").toInt();
    t2 = server.arg("t2").toInt();
    v1 = server.arg("v1").toInt();

    EEPROM.write(0, t1 >> 8);
    EEPROM.write(1, t1 & 0xFF);
    EEPROM.write(2, t2 >> 8);
    EEPROM.write(3, t2 & 0xFF);
    EEPROM.write(4, v1 >> 8);
    EEPROM.write(5, v1 & 0xFF);
    EEPROM.commit();
  }
}
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