#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

#define LED_PIN GPIO_NUM_2  // change as needed

void app_main(void)
{
    gpio_reset_pin(LED_PIN);
    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);

    while (1) {
        gpio_set_level(LED_PIN, 1); // ON
        vTaskDelay(pdMS_TO_TICKS(500));

        gpio_set_level(LED_PIN, 0); // OFF
        vTaskDelay(pdMS_TO_TICKS(500));
    }
}