diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index e1cb586..04e00a6 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -1,3 +1,3 @@
 idf_component_register(SRCS "hello_world_main.c"
-                       PRIV_REQUIRES spi_flash esp_driver_gpio
+                       PRIV_REQUIRES spi_flash esp_driver_gpio vfs esp_vfs_console
                        INCLUDE_DIRS "")
diff --git a/main/hello_world_main.c b/main/hello_world_main.c
index 026ac41..d48438c 100644
--- a/main/hello_world_main.c
+++ b/main/hello_world_main.c
@@ -8,27 +8,41 @@
 #include "esp_flash.h"
 #include "esp_system.h"
 #include "driver/gpio.h"
+#include "esp_vfs_dev.h"
+#include "esp_vfs_cdcacm.h"
 
 #define LED_GPIO 15
 
 void app_main(void)
 {
+    // Initialisation explicite du CDC-ACM pour ESP32-S2
+#if CONFIG_ESP_CONSOLE_USB_CDC
+    esp_err_t ret = esp_vfs_dev_cdcacm_register();
+    if (ret != ESP_OK) {
+        // Si l'initialisation échoue, on continue quand même
+    }
+#endif
+
+    // Délai pour permettre l'initialisation USB-CDC
+    vTaskDelay(pdMS_TO_TICKS(1000));
+
+    printf("\n\n=== Démarrage ESP32-S2 avec USB-CDC ===\n\n");
 
     gpio_config_t io_conf = {
-        .pin_bit_mask = LED_GPIO,
+        .pin_bit_mask = (1ULL << 15),
         .mode = GPIO_MODE_OUTPUT,
         .pull_up_en = GPIO_PULLUP_DISABLE,
         .pull_down_en = GPIO_PULLDOWN_DISABLE,
         .intr_type = GPIO_INTR_DISABLE, // No interrupt for now
     };
 
-    esp_err_t ret = gpio_config(&io_conf);
+    gpio_config(&io_conf);
 
     while(1) {
-        printf("hello");
-        vTaskDelay(1000 / portTICK_PERIOD_MS);
+        printf("loop from ESP32-S2 via USB-CDC!\n");
         gpio_set_level(LED_GPIO, 1);
         vTaskDelay(1000 / portTICK_PERIOD_MS);
         gpio_set_level(LED_GPIO, 0);
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
     }
 }