Wifi.setHostname problem with ESP32dev Board version 2.00 and higher

[JaroslavLinhart]

I have problem with Wifi.setHostname problem with ESP32dev Board version 2.00 and above. It works for version up to 1.06 and does not work from version 2.00 and higher. Instead of the text that I want to write in hostName, ESP32-303754 or another number depending on the chip will be written.
Wifi.getHostname prints the required text and only ESP32-303754 is visible on the mikrotik DHCP router.
Don't know how to solve this?

#include <WiFi.h>

// Replace with your network credentials (STATION)
const char* ssid = "xxxxx";
const char* password = "xxxxx";
String hostname = "ESP32HumidityNode";

void initWiFi() {
WiFi.mode(WIFI_STA);
WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE, INADDR_NONE);
WiFi.setHostname(hostname.c_str()); //define hostname
//wifi_station_set_hostname( hostname.c_str() );
WiFi.begin(ssid, password);
Serial.print("Connecting to WiFi ..");
while (WiFi.status() != WL_CONNECTED) {
Serial.print('.');
delay(1000);
}
Serial.println(WiFi.localIP());
}

void setup() {
Serial.begin(115200);
initWiFi();
Serial.print("RRSI: ");
Serial.println(WiFi.RSSI());
Serial.print("Host name: ");
Serial.println(WiFi.getHostname());
delay(1000);

}

void loop() {

}

[mrengineer7777]

Move sethostname before WiFi.mode(WIFI_STA); Hostname is only applied when starting WiFi. This is a limitation of the current Arduino and possibly IDF architecture. It has confused lots of people.