M5stackでmDNSを扱う

#include <m5stack.h>

#include <wifi.h>
#include <wificlient.h>
#include <webserver.h>
#include <espmdns.h>

const char* ssid = "said"; // set your said
const char* password = "pw"; // set your pw

String target_dev = "NODE-1cdc";

WebServer server(80);

void handleRoot() {
  server.send(200, "text/plain", "hello from M5stack server using mDNS!");
}

void handleNotFound() {
  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += (server.method() == HTTP_GET) ? "GET" : "POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";
  for (uint8_t i = 0; i < server.args(); i++) {
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }
  server.send(404, "text/plain", message);
}

void setup(void) {
  M5.begin(true, false, true);
  M5.Power.begin();       // Init power  
  M5.lcd.setTextSize(2);  // Set the text size to 2. 
  M5.Lcd.setTextColor(WHITE);     // set font color to white
  M5.lcd.fillScreen(BLACK);
  delay(500);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("");

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  M5.lcd.setCursor(50, 110);
  M5.Lcd.print("connected to Wi-Fi");

  mdns_init();
  IPAddress ip = MDNS.queryHost(target_dev);
  Serial.println("");
  Serial.print(target_dev + " : ");
  Serial.println(ip);

  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  if (MDNS.begin("m5stack")) {
    Serial.println("MDNS responder started");
  }

  server.on("/", handleRoot);

  server.on("/inline", []() {
    server.send(200, "text/plain", "this works as well");
  });

  server.onNotFound(handleNotFound);

  server.begin();
  Serial.println("HTTP server started");
}

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