diff --git a/README.md b/README.md
index e92b855..b5fbb3c 100644
--- a/README.md
+++ b/README.md
@@ -17,11 +17,12 @@
 |Value|Register|
 |---|---|
 |LED ON 		 | 40001|
-|LED SMOOTH		 | 40002|
-|CO2 ALERT LIMIT1 	 | 40003|
-|CO2 ALERT LIMIT2 	 | 40004|
-|SCD4x T OFFSET	  	 | 40005|
-|MODBUS ADDR  		 | 40006|
+|LED BRIGHTNESS		 | 40002|
+|LED SMOOTH		 | 40003|
+|CO2 ALERT LIMIT1 	 | 40004|
+|CO2 ALERT LIMIT2 	 | 40005|
+|SCD4x T OFFSET	  	 | 40006|
+|MODBUS ADDR  		 | 40007|
 
 ### Device Information Registers
 
diff --git a/fw/Core/Inc/config.h b/fw/Core/Inc/config.h
index f5a0df1..8040bd7 100644
--- a/fw/Core/Inc/config.h
+++ b/fw/Core/Inc/config.h
@@ -49,6 +49,7 @@ config_read(&config);
  * Device configuration data can be accessed using config_t struct.
  */
 #define CONFIG_DEFAULT_LED_ON					1
+#define CONFIG_DEFAULT_LED_BRIGHTNESS			100 /* TODO: set according to the timers when this will be implemented */
 #define CONFIG_DEFAULT_LED_ALERT1_LIMIT			1500
 #define CONFIG_DEFAULT_LED_ALERT2_LIMIT			3000
 #define CONFIG_DEFAULT_LED_SMOOTH				0
@@ -56,6 +57,7 @@ config_read(&config);
 
 #define	MODBUS_ADDR_LENGTH						2
 #define CONFIG_LED_ON_LENGTH					2
+#define CONFIG_LED_BRIGHTNESS_LENGTH			2
 #define CONFIG_LED_SMOOTH_LENGTH				2
 #define CONFIG_LED_ALERT1_LENGTH				2
 #define CONFIG_LED_ALERT2_LENGTH				2
@@ -74,7 +76,8 @@ config_read(&config);
 
 #define CONFIG_EEPROM_ADDR_MODBUS_ADDR			(EEPROM_ADDR_START)
 #define CONFIG_EEPROM_ADDR_LED_ON				(CONFIG_EEPROM_ADDR_MODBUS_ADDR 		+ MODBUS_ADDR_LENGTH)
-#define CONFIG_EEPROM_ADDR_LED_SMOOTH			(CONFIG_EEPROM_ADDR_LED_ON				+ CONFIG_LED_ON_LENGTH)
+#define CONFIG_EEPROM_ADDR_LED_BRIGHTNESS		(CONFIG_EEPROM_ADDR_LED_ON				+ CONFIG_LED_ON_LENGTH)
+#define CONFIG_EEPROM_ADDR_LED_SMOOTH			(CONFIG_EEPROM_ADDR_LED_BRIGHTNESS		+ CONFIG_LED_BRIGHTNESS_LENGTH)
 #define CONFIG_EEPROM_ADDR_LED_ALERT1			(CONFIG_EEPROM_ADDR_LED_SMOOTH			+ CONFIG_LED_SMOOTH_LENGTH)
 #define CONFIG_EEPROM_ADDR_LED_ALERT2			(CONFIG_EEPROM_ADDR_LED_ALERT1 			+ CONFIG_LED_ALERT1_LENGTH)
 #define CONFIG_EEPROM_ADDR_SCD4x_T_OFFSET		(CONFIG_EEPROM_ADDR_LED_ALERT2 			+ CONFIG_LED_ALERT2_LENGTH)
@@ -105,6 +108,7 @@ typedef struct
 {
 	/* LED CONFIG */
 	uint8_t led_on;
+	uint16_t led_brightness;
 	uint8_t led_smooth;
 	uint16_t led_co2_alert_limit1;
 	uint16_t led_co2_alert_limit2;
diff --git a/fw/Core/Src/config.c b/fw/Core/Src/config.c
index cc6f01c..8236b0f 100644
--- a/fw/Core/Src/config.c
+++ b/fw/Core/Src/config.c
@@ -22,6 +22,7 @@ int8_t config_read(config_t *config)
 {
 	config->modbus_addr = *(uint16_t *) (CONFIG_EEPROM_ADDR_MODBUS_ADDR);
 	config->led_on = *(uint16_t *) (CONFIG_EEPROM_ADDR_LED_ON);
+	config->led_brightness = *(uint16_t *) (CONFIG_EEPROM_ADDR_LED_BRIGHTNESS);
 	config->led_smooth = *(uint16_t *) (CONFIG_EEPROM_ADDR_LED_SMOOTH);
 	config->led_co2_alert_limit1 = *(uint16_t *) (CONFIG_EEPROM_ADDR_LED_ALERT1);
 	config->led_co2_alert_limit2 = *(uint16_t *) (CONFIG_EEPROM_ADDR_LED_ALERT2);
@@ -59,6 +60,12 @@ int8_t config_write(config_t *config)
 		return EEPROM_WRITE_ERROR;
 	}
 
+	/* Write LED BRIGHTNESS */
+	if (eeprom_program_word(CONFIG_EEPROM_ADDR_LED_BRIGHTNESS, config->led_brightness)  != EEPROM_OK)
+	{
+		return EEPROM_WRITE_ERROR;
+	}
+
 	/* Write LED SMOOTH */
 	if (eeprom_program_byte(CONFIG_EEPROM_ADDR_LED_SMOOTH, config->led_smooth)  != EEPROM_OK)
 	{
diff --git a/fw/Core/Src/main.c b/fw/Core/Src/main.c
index 2566675..09577ac 100644
--- a/fw/Core/Src/main.c
+++ b/fw/Core/Src/main.c
@@ -81,11 +81,12 @@ enum {
 
 enum {
 	REGISTER_NUM_LED_ON = 40001,
-	REGISTER_NUM_LED_SMOOTH = 40002,
-	REGISTER_NUM_CO2_ALERT_LIMIT1 = 40003,
-	REGISTER_NUM_CO2_ALERT_LIMIT2 = 40004,
-	REGISTER_NUM_SCD4x_T_OFFSET = 40005,
-	REGISTER_NUM_MODBUS_ADDR = 40006,
+	REGISTER_NUM_LED_BRIGHTNESS = 40002,
+	REGISTER_NUM_LED_SMOOTH = 40003,
+	REGISTER_NUM_CO2_ALERT_LIMIT1 = 40004,
+	REGISTER_NUM_CO2_ALERT_LIMIT2 = 40005,
+	REGISTER_NUM_SCD4x_T_OFFSET = 40006,
+	REGISTER_NUM_MODBUS_ADDR = 40007,
 } config_registers_numbers;
 
 enum {
@@ -286,6 +287,7 @@ int main(void)
 	  sensor_config.led_co2_alert_limit1 = CONFIG_DEFAULT_LED_ALERT1_LIMIT;
 	  sensor_config.led_co2_alert_limit2 = CONFIG_DEFAULT_LED_ALERT2_LIMIT;
 	  sensor_config.led_on = CONFIG_DEFAULT_LED_ON;
+	  sensor_config.led_brightness = CONFIG_DEFAULT_LED_BRIGHTNESS;
 	  sensor_config.led_smooth = CONFIG_DEFAULT_LED_SMOOTH;
 	  sensor_config.scd4x_t_offset = CONFIG_DEFAULT_SCD4x_T_OFFSET;
   }