WifiManager

#include <WiFi.h>
#include <WebServer.h>
#include <DNSServer.h>
#include <WiFiManager.h>


#define TRIGGER_PIN 4


void setup() {
  Serial.begin(115200);
  Serial.println("\n Starting");
  pinMode(TRIGGER_PIN, INPUT);
}


void loop() {

  if ( digitalRead(TRIGGER_PIN) == LOW ) {
    WiFiManager wifiManager;
    if (!wifiManager.startConfigPortal("ESP32Wifi","12345678")) {
      Serial.println("failed to connect and hit timeout");
      delay(3000);
      ESP.reset();
      delay(5000);
    }

    Serial.println("connected...yeey :)");
  }

 }