diff --git a/projects/t31_lite_faceter/general/overlay/usr/sbin/dn-monitor.sh b/projects/t31_lite_faceter/general/overlay/usr/sbin/dn-monitor.sh
new file mode 100755
index 0000000..d83fe70
--- /dev/null
+++ b/projects/t31_lite_faceter/general/overlay/usr/sbin/dn-monitor.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+again_high_target=120
+again_low_target=50
+pollingInterval=4
+led_state=0
+again_led=0
+
+led_on(){
+	curl http://localhost/night/on && \
+	echo LIGHT IS ON
+}
+
+led_off(){
+	curl http://localhost/night/off && \
+	echo LIGHT IS OFF
+}
+
+main(){
+
+	echo "...................."
+	echo "Watching at isp_again > ${again_high_target} to LED ON"
+	echo "Watching at isp_again < ${again_low_target} to LED OFF"
+	echo "Polling interval: ${pollingInterval} sec"
+	echo "...................."
+
+	sleep 10
+	led_off
+
+	while true; do
+
+		led_state=$(curl -s http://localhost/metrics | grep ^night_enabled  | cut -d' ' -f2)
+		again_led=$(curl -s http://localhost/metrics | grep ^isp_again | cut -d' ' -f2)
+
+		echo "again_led: "$again_led
+
+		if [ $again_led -lt $again_low_target -a $led_state -eq 1 ] ;then
+			led_off
+		fi
+
+		if [ $again_led -gt $again_high_target -a $led_state -eq 0 ] ;then
+			led_on
+		fi
+
+		sleep ${pollingInterval}
+		echo "...................."
+        done
+}
+
+main