diff --git a/docs/use/gateway.md b/docs/use/gateway.md
index 99e9660256..a25c7b8bdd 100644
--- a/docs/use/gateway.md
+++ b/docs/use/gateway.md
@@ -7,3 +7,18 @@
 ## Erase the ESP settings
 
 `mosquitto_pub -t "home/OpenMQTTGateway/commands/MQTTtoSYS/config" -m '{"cmd":"erase"}'`
+
+# State LED usage
+
+The gateway can support up to 3 LED to display its operating state:
+* LED_INFO 
+switched ON when network and MQTT connection are OK
+5s ON, 5s OFF when WIFI is disconnected
+1s ON, 4s OFF when MQTT is disconnected
+
+* LED_RECEIVE
+Blink for `TimeLedON` 0.5s when the gateway receive a signal from one of its module so as to send to MQTT
+
+* LED_SEND
+Blink for `TimeLedON` 0.5s when the gateway send a signal with one of its module from an MQTT command
+
diff --git a/main/User_config.h b/main/User_config.h
index 6ce3404360..91ccf5cdfd 100755
--- a/main/User_config.h
+++ b/main/User_config.h
@@ -174,8 +174,8 @@ const char* certificate CERT_ATTRIBUTE = R"EOF("
 
 /*------------------DEEP SLEEP parameters ------------------*/
 //DEFAULT_LOW_POWER_MODE 0 to normal mode (no power consumption optimisations)
-//DEFAULT_LOW_POWER_MODE 1 to activate deep sleep with LCD ON when a function is processing,
-//DEFAULT_LOW_POWER_MODE 2 to activate deep sleep with LED ON when a function is processing (LCD is turned OFF)
+//DEFAULT_LOW_POWER_MODE 1 to activate deep sleep 
+//DEFAULT_LOW_POWER_MODE 2 to activate deep sleep (LCD is turned OFF)
 #ifdef ESP32
 #  ifndef DEFAULT_LOW_POWER_MODE
 #    define DEFAULT_LOW_POWER_MODE 0