Setting hostname on ESP8266 with STM32

Question

I'm currently facing a problem with setting a hostname for the ESP8266. My STM32 is connected to the ESP over Uart and the connection is working. So I'm able so set up a Acccess Point or connect to a Wifi by using AT-commands. Problem is that i always need to figure out my IP and put the IP in the browser which is uncomftable.

I spent the last days to solve this issue and looked in some Arduino/ESP librarys without any success.

In the code there are some lines commented out whith some AT-commands I tried to use. But those weren't working or had issues. The reply of the ESP I put behind the command

...some other code

    Uart_sendstring("AT+RST\r\n", wifi_uart);
    for (int i=0; i<5; i++)
    {
        HAL_Delay(1000);
    }

    /********* AT **********/
    Uart_flush(wifi_uart);
    Uart_sendstring("AT\r\nAT\r\n", wifi_uart);
    while(!(Wait_for("OK\r\n", wifi_uart)));

    Uart_flush(wifi_uart);
    if (AP == CONNECT_AP)
    {

        //test
        Uart_flush(wifi_uart);
        //Uart_sendstring("AT+MDNS=1, my_test, iot, 80\r\n", wifi_uart); ->reply: get hostname fail when mdns
        //Uart_sendstring("AT+CWHOSTNAME=my_test\r\n", wifi_uart); -> reply: ERROR
        //Uart_sendstring("AT+CWHOSTNAME?\r\n", wifi_uart); -> reply: ERROR
        while (!(Wait_for("OK\r\n", wifi_uart)));
        //test end


        /********* AT+CWMODE=1 **********/
        Uart_flush(wifi_uart);
        Uart_sendstring("AT+CWMODE=1\r\n", wifi_uart); // connect to AP
        while (!(Wait_for("OK\r\n", wifi_uart)));

        /********* AT+CWJAP="SSID","PASSWD" **********/
        Uart_flush(wifi_uart);
        sprintf (data, "AT+CWJAP=\"%s\",\"%s\"\r\n", SSID, PASSWD);
        Uart_sendstring(data, wifi_uart);
        while (!(Wait_for("OK\r\n", wifi_uart)));

        /********* AT+CIFSR **********/
        // Zum Anzeigen von IP und Mac-Adresse
        Uart_flush(wifi_uart);
        Uart_sendstring("AT+CIFSR\r\n", wifi_uart);
        while (!(Wait_for("CIFSR:STAIP,\"", wifi_uart)));
        while (!(Copy_upto("\"",My_IP, wifi_uart)));
        while (!(Wait_for("OK\r\n", wifi_uart)));
    }
    else if (AP == OPEN_AP)
    {

        //test
        Uart_flush(wifi_uart);
        //Uart_sendstring("AT+MDNS=1, my_test, iot, 80\r\n", wifi_uart);
        //Uart_sendstring("AT+CWHOSTNAME=my_test\r\n", wifi_uart);
        //Uart_sendstring("AT+CWHOSTNAME?\r\n", wifi_uart);
        while (!(Wait_for("OK\r\n", wifi_uart)));
        //end test

        /********* AT+CWMODE=2 **********/
        Uart_flush(wifi_uart);
        Uart_sendstring("AT+CWMODE=2\r\n", wifi_uart); // open AP
        while (!(Wait_for("OK\r\n", wifi_uart)));

        /********* AT+CWJAP="SSID","PASSWD" **********/
        Uart_flush(wifi_uart);
        sprintf (data, "AT+CWSAP=\"%s\",\"%s\",%d,%d\r\n", SSID, PASSWD, 11, 3);
        Uart_sendstring(data, wifi_uart);
        while (!(Wait_for("OK\r\n", wifi_uart)));
    }
        
    /********* AT+CIPMUX **********/
    Uart_flush(wifi_uart);
    Uart_sendstring("AT+CIPMUX=1\r\n", wifi_uart);
    while (!(Wait_for("OK\r\n", wifi_uart)));

    /********* AT+CIPSERVER **********/
    Uart_flush(wifi_uart);
    Uart_sendstring("AT+CIPSERVER=1,80\r\n", wifi_uart);
    while (!(Wait_for("OK\r\n", wifi_uart)));

I would be very thankful if someone could help me solving this problem.

I'm not very deep in the mdns topic and setting up a Access Point. I'm just trying to open a Website to connect.

Best regards Max