diff --git a/components/ledController/include/ledController.h b/components/ledController/include/ledController.h
index 2738638..2fec394 100644
--- a/components/ledController/include/ledController.h
+++ b/components/ledController/include/ledController.h
@@ -1,6 +1,8 @@
 #ifndef LED_CONT_H
 #define LED_CONT_H
 
+#include "esp_err.h"
+
 struct led_disp_config {
 	uint8_t output;
 	uint16_t min;
diff --git a/default_conf.csv b/default_conf.csv
new file mode 100644
index 0000000..9f39c78
--- /dev/null
+++ b/default_conf.csv
@@ -0,0 +1,8 @@
+# Default nvs configuration
+key,type,encoding,value
+main,namespace,,
+wireless_conf,data,binary,00000001
+sensor_conf,data,binary,00000000
+led1_conf,data,hex2bin,0400DC051027640001FF
+led2_conf,data,hex2bin,0500BC02DB05640001FF
+led3_conf,data,hex2bin,06000000BB02640001FF
diff --git a/main/CO2_Sense.c b/main/CO2_Sense.c
index 7923250..b630d79 100644
--- a/main/CO2_Sense.c
+++ b/main/CO2_Sense.c
@@ -1,3 +1,4 @@
+#include "CO2_Sense.h"
 #include <string.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -18,54 +19,23 @@
 #include "sensirion_i2c_hal.h"
 #include "scd4x_data.h"
 
-void fetch_sensor_task(void* pvParameters){
-	scd4x_config_t* conf = (scd4x_config_t*) pvParameters;
-	scd4x_data_t* measures = conf->measure;
-	while(1){
-		vTaskDelay(conf->delay * 1000 / portTICK_PERIOD_MS);
-		int16_t error = scd4x_read_measurement(&measures->co2, &measures->temperature, &measures->humidity);
-                if (error)
-                        ESP_LOGE("sensor fetch", "Error executing scd4x_read_measurement(): %i\n", error);
-	}
-}
+#define LED1_PIN CONFIG_LED_1_PIN
+#define LED2_PIN CONFIG_LED_2_PIN
+#define LED3_PIN CONFIG_LED_3_PIN
+
+#define LED_NUMBER 3
+
 void app_main(void){
-	// init LEDs driver
-	led_disp_config_t led_configs[] = {
-		[0] = {
-			.output = 4,
-			.min = 1500,
-			.max = 10000,
-			.intensity = 100,
-			.blink_duty_cycle = 1,
-			.blink_delay = 255,
-		},
-		[1] = {
-			.output = 5,
-			.min = 700,
-			.max = 1499,
-			.intensity = 100,
-			.blink_duty_cycle = 1,
-			.blink_delay = 255,
-		},
-		[2] = {
-			.output = 6,
-			.min = 0,
-			.max = 699,
-			.intensity = 100,
-			.blink_duty_cycle = 1,
-			.blink_delay = 255,
-		},
-	};
-
-	init_led_driver(led_configs, sizeof(led_configs)/sizeof(led_disp_config_t));
+	init_nvs();
+	
+	nvs_handle_t nvs_handle;
+    	ESP_ERROR_CHECK(nvs_open("main", NVS_READWRITE, &nvs_handle));
 
+	// init LEDs driver	
+	led_disp_config_t* led_configs = generate_led_conf(nvs_handle,LED_NUMBER);
+	init_led_driver(led_configs, LED_NUMBER);
+	
 	// init wifi AP (and 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);
 	wifi_config_t wifi_config = wifi_config_generator("CO2Sense","testtest",1);
 
 	wifi_init_softap(wifi_config);
@@ -127,6 +97,38 @@ void app_main(void){
 	while(1){
 		vTaskDelay(1000 / portTICK_PERIOD_MS);
 		ESP_LOGI("MAIN", "co2 : %u ppm, temp : %d m°C, hum : %d mRH", sensor_data.co2, sensor_data.temperature, sensor_data.humidity);
-		update_led_status(led_configs, sizeof(led_configs)/sizeof(led_disp_config_t), sensor_data.co2);
+		update_led_status(led_configs, LED_NUMBER, sensor_data.co2);
 	}
 }
+
+void fetch_sensor_task(void* pvParameters){
+	scd4x_config_t* conf = (scd4x_config_t*) pvParameters;
+	scd4x_data_t* measures = conf->measure;
+	while(1){
+		vTaskDelay(conf->delay * 1000 / portTICK_PERIOD_MS);
+		int16_t error = scd4x_read_measurement(&measures->co2, &measures->temperature, &measures->humidity);
+                if (error)
+                        ESP_LOGE("sensor fetch", "Error executing scd4x_read_measurement(): %i\n", error);
+	}
+}
+
+void init_nvs(void){
+	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);
+
+}
+
+led_disp_config_t* generate_led_conf(nvs_handle_t nvs, unsigned int nb){
+	led_disp_config_t* led_configs = malloc(nb * sizeof(led_disp_config_t));
+	size_t conf_size = sizeof(led_disp_config_t);
+	for(int i = 0; i < nb; i++){
+		char key[15];
+		sprintf(key, "led%i_conf", i+1);
+		ESP_ERROR_CHECK(nvs_get_blob(nvs, key, &led_configs[i], &conf_size));
+	}
+	return led_configs;
+}
diff --git a/main/CO2_Sense.h b/main/CO2_Sense.h
new file mode 100644
index 0000000..5093e8d
--- /dev/null
+++ b/main/CO2_Sense.h
@@ -0,0 +1,6 @@
+#include "ledController.h"
+#include "nvs.h"
+
+void fetch_sensor_task(void* pvParameters);
+void init_nvs(void);
+led_disp_config_t* generate_led_conf(nvs_handle_t nvs, unsigned int nb);
diff --git a/main/Kconfig.projbuild b/main/Kconfig.projbuild
new file mode 100644
index 0000000..00165f7
--- /dev/null
+++ b/main/Kconfig.projbuild
@@ -0,0 +1,24 @@
+menu "CO2Sense config"
+	menu "LED pins"
+		config LED_1_PIN
+			int "pin"
+			range 0 10
+			default 4
+			help
+				The pin on which the 1st LED is connected
+		
+		config LED_2_PIN
+			int "pin"
+			range 0 10
+			default 5
+			help
+				The pin on which the 2nd LED is connected
+		
+		config LED_3_PIN
+			int "pin"
+			range 0 10
+			default 6
+			help
+				The pin on which the 3rd LED is connected
+	endmenu
+endmenu
diff --git a/nvs.bin b/nvs.bin
new file mode 100644
index 0000000..5874d99
Binary files /dev/null and b/nvs.bin differ
diff --git a/sdkconfig b/sdkconfig
index c335edc..dbfa75b 100644
--- a/sdkconfig
+++ b/sdkconfig
@@ -299,6 +299,19 @@ CONFIG_PARTITION_TABLE_OFFSET=0x8000
 CONFIG_PARTITION_TABLE_MD5=y
 # end of Partition Table
 
+#
+# CO2Sense config
+#
+
+#
+# LED pins
+#
+CONFIG_LED_1_PIN=4
+CONFIG_LED_2_PIN=5
+CONFIG_LED_3_PIN=6
+# end of LED pins
+# end of CO2Sense config
+
 #
 # Compiler options
 #