Rutina oficial: ejemplos\protocolos\static_ip
Para facilitar el cambio de configuración de IP y WIFI, el código completo modificado es el siguiente:
#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.h"
#include "esp_log.h"
#include <netdb.h>
#include "nvs_flash.h"
#define EXAMPLE_MAXIMUM_RETRY CONFIG_EXAMPLE_MAXIMUM_RETRY
#ifdef CONFIG_EXAMPLE_STATIC_DNS_AUTO
#define EXAMPLE_BACKUP_DNS_SERVER "0.0.0.0"
#else
#define EXAMPLE_MAIN_DNS_SERVER CONFIG_EXAMPLE_STATIC_DNS_SERVER_MAIN
#define EXAMPLE_BACKUP_DNS_SERVER CONFIG_EXAMPLE_STATIC_DNS_SERVER_BACKUP
#endif
/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static const char *TAG = "WIFI";
static const char *ip_ip,*ip_netmask,*ip_gw;
static int s_retry_num = 0;
static esp_err_t example_set_dns_server(esp_netif_t *netif, uint32_t addr, esp_netif_dns_type_t type)
{
if (addr && (addr != IPADDR_NONE)) {
esp_netif_dns_info_t dns;
dns.ip.u_addr.ip4.addr = addr;
dns.ip.type = IPADDR_TYPE_V4;
ESP_ERROR_CHECK(esp_netif_set_dns_info(netif, type, &dns));
}
return ESP_OK;
}
static void example_set_static_ip(esp_netif_t *netif)
{
if (esp_netif_dhcpc_stop(netif) != ESP_OK) {
ESP_LOGE(TAG, "Failed to stop dhcp client");
return;
}
esp_netif_ip_info_t ip;
memset(&ip, 0 , sizeof(esp_netif_ip_info_t));
ip.ip.addr = ipaddr_addr(ip_ip);
ip.netmask.addr = ipaddr_addr(ip_netmask);
ip.gw.addr = ipaddr_addr(ip_gw);
if (esp_netif_set_ip_info(netif, &ip) != ESP_OK) {
ESP_LOGE(TAG, "Failed to set ip info");
return;
}
ESP_LOGD(TAG, "Success to set static ip: %s, netmask: %s, gw: %s", ip_ip, ip_netmask, ip_gw);
ESP_ERROR_CHECK(example_set_dns_server(netif, ipaddr_addr(ip_gw), ESP_NETIF_DNS_MAIN));
ESP_ERROR_CHECK(example_set_dns_server(netif, ipaddr_addr(EXAMPLE_BACKUP_DNS_SERVER), ESP_NETIF_DNS_BACKUP));
}
static void event_handler(void* arg, esp_event_base_t event_base,int32_t event_id, void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_CONNECTED) {
example_set_static_ip(arg);
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
if (s_retry_num < EXAMPLE_MAXIMUM_RETRY) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
} else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG,"connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "static ip:" IPSTR, IP2STR(&event->ip_info.ip));
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
}
}
void ip_set(const char *ip,const char *mask,const char *gw)
{
ip_ip = ip;
ip_netmask = mask;
ip_gw = gw;
}
void wifi_init_sta(const char *ssid,const char *password)
{
ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
s_wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
assert(sta_netif);
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
esp_event_handler_instance_t instance_any_id;
esp_event_handler_instance_t instance_got_ip;
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,ESP_EVENT_ANY_ID,&event_handler,sta_netif,&instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,IP_EVENT_STA_GOT_IP,&event_handler,sta_netif,&instance_got_ip));
wifi_config_t wifi_config = {
.sta = {
// .ssid = CONFIG_EXAMPLE_WIFI_SSID,
// .password = CONFIG_EXAMPLE_WIFI_PASSWORD,
/* Setting a password implies station will connect to all security modes including WEP/WPA.
* However these modes are deprecated and not advisable to be used. Incase your Access point
* doesn't support WPA2, these mode can be enabled by commenting below line */
.threshold.authmode = WIFI_AUTH_WPA2_PSK,
},
};
memcpy(wifi_config.sta.ssid,ssid, sizeof(wifi_config.sta.ssid));
memcpy(wifi_config.sta.password,password, sizeof(wifi_config.sta.password));
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
ESP_ERROR_CHECK(esp_wifi_start() );
ESP_LOGI(TAG, "wifi_init_sta finished.");
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",ssid, password);
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",ssid, password);
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
}
/* The event will not be processed after unregister */
ESP_ERROR_CHECK(esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
ESP_ERROR_CHECK(esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
vEventGroupDelete(s_wifi_event_group);
}
void app_main(void)
{
//Initialize NVS
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);
ip_set("192.168.1.120","255.255.255.0","192.168.1.1");
wifi_init_sta("Tenda","66888888");
}