creates server

nodemcuESPserver.ino

/* Create a WiFi access point and provide a web server on it. */

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



/* Set these to your desired credentials. */
const char *ssid = "*********";
const char *password = "***********";
boolean ledState = false;

ESP8266WebServer server(80);

/* Just a little test message.  Go to http://192.168.4.1 in a web browser
   connected to this access point to see it.
*/
void handleRoot() {
  server.send(200, "text/html", "<h1>You are connected</h1>");
}

void setup() {
  pinMode(BUILTIN_LED, OUTPUT);
  delay(1000);
  Serial.begin(115200);
  Serial.println();
  Serial.print("Configuring access point...");
  /* You can remove the password parameter if you want the AP to be open. */
  WiFi.softAP(ssid, password);

  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);
  server.on("/", handleRoot);
  server.on("/steinacoz/led", controlLED);
  server.begin();
  Serial.println("HTTP server started");
}

void controlLED() {
  ledState = !ledState;
  if(ledState == true){
    digitalWrite(BUILTIN_LED, ledState);
    server.send(200, "text/plain", "LED OFF");
    Serial.println("led OFF");
    }else{
      digitalWrite(BUILTIN_LED, ledState);
      server.send(200, "text/plain", "LED ON");
      Serial.println("led ON");
    }
  
  
}

void loop() {
  server.handleClient();

}