access point and web server

[yemred]

i am trying to create a simple web server using access point. but code doesnt work and i am stuck. is there any one who can tell me why this code doesnt work. i guess i have problem at root_get_handler section. but why i cant find anything working, i saw who wanna work with idf not arduino, most of them facing same problem with me and there is no any working example, just arduino always

Code: Select all

#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "lwip/err.h"
#include "lwip/sys.h"
#include <sys/param.h>
#include "nvs_flash.h"
#include "esp_netif.h"
#include "esp_eth.h"
#include <esp_http_server.h>
#include <stdbool.h>
#include <string.h>
#include "esp_event.h"
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "driver/timer.h"
#include "esp_event.h"

#define AP_SSID       "EMRE"
#define AP_PASS       "12345678"
#define AP_CHANNEL    0
#define AP_MAX_CONN   4

static const char *TAG1 = "AccessPoint";
static const char *TAG2 = "start_webserver";
static const char *TAG3 = "root_get_handler";
static const char *TAG4 = "connect_handler";
static const char *TAG5 = "app_main";


/* ----------------------NOT ENTERING THIS SECTION---------------------- */
static esp_err_t root_get_handler(httpd_req_t *req)
{
	ESP_LOGI(TAG3, " is working");
	esp_err_t error;

    const char* resp_str = (const char*) req->user_ctx;

    error = httpd_resp_send(req, resp_str, strlen(resp_str));

    if (error != ESP_OK) {
        ESP_LOGI(TAG3, "ERROR %d httpd_resp_send",error);
    }
    else ESP_LOGI(TAG3, "httpd_resp_send SUCCESS");
    return ESP_OK;
}
/* ---------------------NOT ENTERING THIS SECTION---------------------- */

static const httpd_uri_t root = {
    .uri       = "/webserver",
    .method    = HTTP_GET,
    .handler   = root_get_handler,
    .user_ctx  = "EMRE"
};


static httpd_handle_t start_webserver(void)
{
    httpd_handle_t server = NULL;
    httpd_config_t config = HTTPD_DEFAULT_CONFIG();
    config.lru_purge_enable = true;

    esp_err_t ret = httpd_start(&server, &config);
    if (ESP_OK != ret) {
        ESP_LOGI(TAG2, "Error httpd_start!");
    }
    else ESP_LOGI(TAG2, "httpd_start SUCCESS");

    // Set URI handlers
    ESP_LOGI(TAG2, "Registering URI handlers");
    ret = httpd_register_uri_handler(server, &root);
    if (ret != ESP_OK) {
        ESP_LOGI(TAG2, "ERROR %d httpd_register_uri_handler",ret);
    }
    else ESP_LOGI(TAG2, "httpd_register_uri_handler SUCCESS");
    return server;
}

static void connect_handler(void* arg, esp_event_base_t event_base,
                            int32_t event_id, void* event_data)
{
	ESP_LOGI(TAG4, " is working");
    httpd_handle_t* server = (httpd_handle_t*) arg;
    if (*server == NULL) {
        *server = start_webserver();
    }
}
//------------------------------------------------------------------------------------------------------------

static void wifi_event_handler(void* arg, esp_event_base_t event_base,
                                    int32_t event_id, void* event_data)
{
    if (event_id == WIFI_EVENT_AP_STACONNECTED) {
        wifi_event_ap_staconnected_t* event = (wifi_event_ap_staconnected_t*) event_data;
        ESP_LOGI(TAG1, "station "MACSTR" join, AID=%d",
                 MAC2STR(event->mac), event->aid);
    } else if (event_id == WIFI_EVENT_AP_STADISCONNECTED) {
        wifi_event_ap_stadisconnected_t* event = (wifi_event_ap_stadisconnected_t*) event_data;
        ESP_LOGI(TAG1, "station "MACSTR" leave, AID=%d",
                 MAC2STR(event->mac), event->aid);
    }
}

void wifi_init_softap(void)
{

    ESP_ERROR_CHECK(esp_netif_init());
    ESP_ERROR_CHECK(esp_event_loop_create_default());
    esp_netif_create_default_wifi_ap();

    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
                    ESP_EVENT_ANY_ID, &wifi_event_handler, NULL, NULL));

    wifi_config_t ap_config = {
    .ap  =  {
        .ssid           =   AP_SSID,
        .password       =   AP_PASS,
        .channel        =   AP_CHANNEL,
        .max_connection =   AP_MAX_CONN,
        .authmode       =   WIFI_AUTH_WPA_WPA2_PSK,
        .ssid_hidden    =   0,
            },
    };

    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &ap_config));
    ESP_ERROR_CHECK(esp_wifi_start());
}

//------------------------------------------------------------------------------------------------------------
void app_main(void)
{
    static httpd_handle_t server = NULL;

	ESP_ERROR_CHECK(nvs_flash_init());

    wifi_init_softap();

    esp_err_t error;
    error = esp_event_handler_register(IP_EVENT, IP_EVENT_AP_STAIPASSIGNED, &connect_handler, &server);

    if (error != ESP_OK) {
        ESP_LOGI(TAG5, "ERROR %d esp_event_handler_register",error);
    }
    else ESP_LOGI(TAG5, "esp_event_handler_register SUCCESS");
}

[ESP_Sprite]

Espressif has examples delivered with the SDK itself, for the webserver there's a bunch here. For your particular issue: what is the output that you get on the serial port from when the ESP starts up to when you try to access the webserver?

[yemred]

SOLVED
this is my bad. code works perfect. the thing i havent seen is the ip of esp32. when i set esp32 AP my pc becomes STA and esp32 gives an ip address. this address is the pc's ip address. when you use the esp32 as an AP and Webserver then you need to know esp32's ip address. This is where i was stucking because i have allready focused on code. when i realized to that then opened the cmd and text ipconfig and get the esp32's ip address and wrote it to browser, all things worked perfect. this was entirely my bad but thanks a lot for your precious repplying fast.