#include <ESP8266WiFi.h>
#include <WiFiUdp.h>

// config:

const char *ssid = "ESPWifiTeszt";  // You will connect your phone to this Access Point
const char *pw = "nincs"; // and this is the password
IPAddress ip(192, 168, 1, 10); // From RoboRemo app, connect to this IP
IPAddress netmask(255, 255, 255, 0);

WiFiUDP UDPTestServer;
unsigned int UDPPort = 4000;
const int packetSize = 20;
char packetBuffer[packetSize];

void setup() {
  Serial.begin(115200);
  WiFi.softAPConfig(ip, ip, netmask); // configure ip address for softAP
  WiFi.softAP(ssid, pw); // configure ssid and password for softAP

  Serial.println("Wemos D1R2 UDP teszt");
  Serial.println((String)"SSID: " + ssid + "  PASS: " + pw);
  Serial.println((String)"RoboRemo app must connect to " + ip.toString() + ":" + UDPPort);

  UDPTestServer.begin(UDPPort);

  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);
}

void loop() {
   handleUDPServer();
   delay(1);
}

void handleUDPServer() {
  int cb = UDPTestServer.parsePacket();
  if (cb) {
    int len = UDPTestServer.read(packetBuffer, packetSize);
    if (len > 0) {
      packetBuffer[len-1] = '\0';
      if (strcmp(packetBuffer, "led_on") == 0) {
           Serial.println("Ha led_on szöveg érkezik...");
          digitalWrite(LED_BUILTIN, HIGH);
       }
       if (strcmp(packetBuffer, "led_off") == 0) {
          Serial.println("Ha led_off szöveg érkezik...");
          digitalWrite(LED_BUILTIN, LOW);
       }
    }
  }
}