#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <WiFiManager.h> 

ESP8266WebServer server(80);

void setup() {

  // Initialize Wifi, start AP if no saved Wifi in range
  WiFiManager wifiManager;
  wifiManager.autoConnect("WEMOS D1 mini pro");

  server.on("/", handleRoot);
  server.onNotFound(handleNotFound);

  server.begin();
}

void loop() {
  server.handleClient();
}

void handleRoot() {
  server.send(200, "text/plain", "hello from esp8266!");
}

void handleNotFound() {
  server.send(404, "text/plain", "404 File Not Found");
}