esp-who/examples/camera_web_server/main/app_wifi.c

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2021-07-15 14:53:20 +08:00
/* ESPRESSIF MIT License
*
* Copyright (c) 2018 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
*
* Permission is hereby granted for use on all ESPRESSIF SYSTEMS products, in which case,
* it is free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event_loop.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "sdkconfig.h"
#include "lwip/err.h"
#include "lwip/sys.h"
#include "mdns.h"
/* The examples use WiFi configuration that you can set via 'make menuconfig'.
If you'd rather not, just change the below entries to strings with
the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
*/
#define EXAMPLE_ESP_WIFI_SSID CONFIG_ESP_WIFI_SSID
#define EXAMPLE_ESP_WIFI_PASS CONFIG_ESP_WIFI_PASSWORD
#define EXAMPLE_ESP_MAXIMUM_RETRY CONFIG_ESP_MAXIMUM_RETRY
#define EXAMPLE_ESP_WIFI_AP_SSID CONFIG_ESP_WIFI_AP_SSID
#define EXAMPLE_ESP_WIFI_AP_PASS CONFIG_ESP_WIFI_AP_PASSWORD
#define EXAMPLE_MAX_STA_CONN CONFIG_MAX_STA_CONN
#define EXAMPLE_IP_ADDR CONFIG_SERVER_IP
#define EXAMPLE_ESP_WIFI_AP_CHANNEL CONFIG_ESP_WIFI_AP_CHANNEL
static const char *TAG = "camera wifi";
static int s_retry_num = 0;
static esp_err_t event_handler(void *ctx, system_event_t *event)
{
switch(event->event_id) {
case SYSTEM_EVENT_AP_STACONNECTED:
ESP_LOGI(TAG, "station:" MACSTR " join, AID=%d",
MAC2STR(event->event_info.sta_connected.mac),
event->event_info.sta_connected.aid);
break;
case SYSTEM_EVENT_AP_STADISCONNECTED:
ESP_LOGI(TAG, "station:" MACSTR "leave, AID=%d",
MAC2STR(event->event_info.sta_disconnected.mac),
event->event_info.sta_disconnected.aid);
break;
case SYSTEM_EVENT_STA_START:
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_GOT_IP:
ESP_LOGI(TAG, "got ip:%s",
ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
s_retry_num = 0;
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
{
if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG,"retry to connect to the AP");
}
ESP_LOGI(TAG,"connect to the AP fail");
break;
}
default:
break;
}
mdns_handle_system_event(ctx, event);
return ESP_OK;
}
void wifi_init_softap()
{
if (strcmp(EXAMPLE_IP_ADDR, "192.168.4.1"))
{
int a, b, c, d;
sscanf(EXAMPLE_IP_ADDR, "%d.%d.%d.%d", &a, &b, &c, &d);
tcpip_adapter_ip_info_t ip_info;
IP4_ADDR(&ip_info.ip, a, b, c, d);
IP4_ADDR(&ip_info.gw, a, b, c, d);
IP4_ADDR(&ip_info.netmask, 255, 255, 255, 0);
ESP_ERROR_CHECK(tcpip_adapter_dhcps_stop(WIFI_IF_AP));
ESP_ERROR_CHECK(tcpip_adapter_set_ip_info(WIFI_IF_AP, &ip_info));
ESP_ERROR_CHECK(tcpip_adapter_dhcps_start(WIFI_IF_AP));
}
wifi_config_t wifi_config;
memset(&wifi_config, 0, sizeof(wifi_config_t));
snprintf((char*)wifi_config.ap.ssid, 32, "%s", EXAMPLE_ESP_WIFI_AP_SSID);
wifi_config.ap.ssid_len = strlen((char*)wifi_config.ap.ssid);
snprintf((char*)wifi_config.ap.password, 64, "%s", EXAMPLE_ESP_WIFI_AP_PASS);
wifi_config.ap.max_connection = EXAMPLE_MAX_STA_CONN;
wifi_config.ap.authmode = WIFI_AUTH_WPA_WPA2_PSK;
if (strlen(EXAMPLE_ESP_WIFI_AP_PASS) == 0) {
wifi_config.ap.authmode = WIFI_AUTH_OPEN;
}
if (strlen(EXAMPLE_ESP_WIFI_AP_CHANNEL)) {
int channel;
sscanf(EXAMPLE_ESP_WIFI_AP_CHANNEL, "%d", &channel);
wifi_config.ap.channel = channel;
}
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
ESP_LOGI(TAG, "wifi_init_softap finished.SSID:%s password:%s",
EXAMPLE_ESP_WIFI_AP_SSID, EXAMPLE_ESP_WIFI_AP_PASS);
}
void wifi_init_sta()
{
wifi_config_t wifi_config;
memset(&wifi_config, 0, sizeof(wifi_config_t));
snprintf((char*)wifi_config.sta.ssid, 32, "%s", EXAMPLE_ESP_WIFI_SSID);
snprintf((char*)wifi_config.sta.password, 64, "%s", EXAMPLE_ESP_WIFI_PASS);
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
ESP_LOGI(TAG, "wifi_init_sta finished.");
ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
}
void app_wifi_main()
{
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
wifi_mode_t mode = WIFI_MODE_NULL;
if (strlen(EXAMPLE_ESP_WIFI_AP_SSID) && strlen(EXAMPLE_ESP_WIFI_SSID)) {
mode = WIFI_MODE_APSTA;
} else if (strlen(EXAMPLE_ESP_WIFI_AP_SSID)) {
mode = WIFI_MODE_AP;
} else if (strlen(EXAMPLE_ESP_WIFI_SSID)) {
mode = WIFI_MODE_STA;
}
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK(ret);
if (mode == WIFI_MODE_NULL) {
ESP_LOGW(TAG,"Neither AP or STA have been configured. WiFi will be off.");
return;
}
tcpip_adapter_init();
ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_wifi_set_mode(mode));
if (mode & WIFI_MODE_AP) {
wifi_init_softap();
}
if (mode & WIFI_MODE_STA) {
wifi_init_sta();
}
ESP_ERROR_CHECK(esp_wifi_start());
ESP_ERROR_CHECK(esp_wifi_set_ps(WIFI_PS_NONE));
}