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104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "esp_system.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "esp_log.h"
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#include "nvs_flash.h"
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#define WIFI_SSID "MYSSID"
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#define WIFI_PASS "MYPASSWORD"
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// Event group
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static EventGroupHandle_t wifi_event_group;
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const int CONNECTED_BIT = BIT0;
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// Wifi event handler
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static esp_err_t event_handler(void *ctx, system_event_t *event)
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{
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switch(event->event_id) {
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case SYSTEM_EVENT_STA_START:
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esp_wifi_connect();
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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// Main task
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void main_task(void *pvParameter)
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{
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// wait for connection
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printf("Main task: waiting for connection to the wifi network... ");
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xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT, false, true, portMAX_DELAY);
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printf("connected!\n");
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// print the local IP address
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tcpip_adapter_ip_info_t ip_info;
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ESP_ERROR_CHECK(tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ip_info));
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printf("IP Address: %s\n", ip4addr_ntoa(&ip_info.ip));
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printf("Subnet mask: %s\n", ip4addr_ntoa(&ip_info.netmask));
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printf("Gateway: %s\n", ip4addr_ntoa(&ip_info.gw));
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while(1) {
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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}
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// Main application
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void app_main()
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{
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// disable the default wifi logging
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esp_log_level_set("wifi", ESP_LOG_NONE);
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// initialize NVS
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ESP_ERROR_CHECK(nvs_flash_init());
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// create the event group to handle wifi events
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wifi_event_group = xEventGroupCreate();
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// initialize the tcp stack
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tcpip_adapter_init();
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// initialize the wifi event handler
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ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
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// initialize the wifi stack in STAtion mode with config in RAM
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wifi_init_config_t wifi_init_config = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&wifi_init_config));
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ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
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// configure the wifi connection and start the interface
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = WIFI_SSID,
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.password = WIFI_PASS,
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},
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};
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ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
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ESP_ERROR_CHECK(esp_wifi_start());
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printf("Connecting to %s\n", WIFI_SSID);
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// start the main task
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xTaskCreate(&main_task, "main_task", 2048, NULL, 5, NULL);
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}
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