WiFiManager/examples/AutoConnect/AutoConnect.ino

#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino

//needed for library
#include <EEPROM.h>
#include <ESP8266mDNS.h>
#include <WiFiManager.h>          //https://github.com/tzapu/WiFiManager

//this intitilises the library, parameter is eeprom start
WiFiManager wifi(0);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  
  //WiFiManager
  //fetches ssid and pass from eeprom and tries to connect
  //if it does not connect it starts an access point with the specified name 
  //here  "AutoConnectAP"
  //and goes into a blocking loop awaiting configuration
  wifi.autoConnect("AutoConnectAP");

  //if you get here you have connected to the WiFi
  Serial.println("connected...yeey :)");
}

void loop() {
  // put your main code here, to run repeatedly:

}