diff --git a/src/plugins/ExternalNotificationPlugin.cpp b/src/plugins/ExternalNotificationPlugin.cpp
index f2cee7cf..fe5a57ae 100644
--- a/src/plugins/ExternalNotificationPlugin.cpp
+++ b/src/plugins/ExternalNotificationPlugin.cpp
@@ -36,7 +36,7 @@ int32_t ExternalNotificationPlugin::runOnce()
     // radioConfig.preferences.externalnotificationplugin_enabled = 1;
     // radioConfig.preferences.externalnotificationplugin_mode = 1;
 
-    if (0) {
+    if (1) {
 
         if (firstTime) {
 
@@ -46,6 +46,16 @@ int32_t ExternalNotificationPlugin::runOnce()
 
             firstTime = 0;
 
+            // Set the direction of a pin
+            pinMode(13, OUTPUT);
+
+            // if ext_notification_plugin_active
+            if (1) { 
+                setExternalOff();
+            } else {
+                setExternalOn();
+            }
+
         } else {
             /*
 
@@ -66,6 +76,27 @@ int32_t ExternalNotificationPlugin::runOnce()
 #endif
 }
 
+void ExternalNotificationPlugin::setExternalOn()
+{
+    // if ext_notification_plugin_active
+    if (1) {
+        digitalWrite(13, true);
+
+    } else {
+        digitalWrite(13, false);
+    }
+}
+
+void ExternalNotificationPlugin::setExternalOff()
+{
+    // if ext_notification_plugin_active
+    if (1) {
+        digitalWrite(13, false);
+    } else {
+        digitalWrite(13, true);
+    }
+}
+
 // --------
 
 MeshPacket *ExternalNotificationPluginRadio::allocReply()
@@ -80,7 +111,7 @@ bool ExternalNotificationPluginRadio::handleReceived(const MeshPacket &mp)
 {
 #ifndef NO_ESP32
 
-    if (0) {
+    if (1) {
 
         auto &p = mp.decoded.data;
 
@@ -95,6 +126,9 @@ bool ExternalNotificationPluginRadio::handleReceived(const MeshPacket &mp)
                 TODO: If ext_notification_plugin_alert_message is true, trigger an external notification.
             */
             // TODO: On received packet, blink the LED.
+            externalNotificationPlugin->setExternalOn();
+            delay(500);
+            externalNotificationPlugin->setExternalOff();
 
         }
 
diff --git a/src/plugins/ExternalNotificationPlugin.h b/src/plugins/ExternalNotificationPlugin.h
index b8eeffe4..54474834 100644
--- a/src/plugins/ExternalNotificationPlugin.h
+++ b/src/plugins/ExternalNotificationPlugin.h
@@ -14,6 +14,9 @@ class ExternalNotificationPlugin : private concurrency::OSThread
   public:
     ExternalNotificationPlugin();
 
+    void setExternalOn();
+    void setExternalOff();
+
   protected:
     virtual int32_t runOnce();
 };