ESP32 DNS example: hostname => IP

arduino-esp32-dns-resolve.ino

#include <WiFi.h>

#define WIFI_SSID ""
#define WIFI_PASS ""

#define DNS_TEST_DOMAIN "google.com"

void setup() {
  Serial.begin(115200);
  Serial.printf("\n\nStart initialization...\n");

  Serial.printf("Begin connecting to %s...\n", WIFI_SSID);
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  while(WiFi.status() != WL_CONNECTED);
  IPAddress ip = WiFi.localIP();
  Serial.printf("Conected to %s. IP address: %d.%d.%d.%d\n", WIFI_SSID, ip[0], ip[1], ip[2], ip[3]);

  IPAddress srv((uint32_t)0);
  if(!WiFiGenericClass::hostByName(DNS_TEST_DOMAIN, srv)){
    Serial.printf("Failt to resolve %s\n", DNS_TEST_DOMAIN);
  }
  Serial.printf("%s => %d.%d.%d.%d\n", DNS_TEST_DOMAIN, srv[0], srv[1], srv[2], srv[3]);
}

void loop() {
  delay(100);
}