diff --git a/wled00/wled00.ino b/wled00/wled00.ino
index 682bb4c72..5263223f8 100644
--- a/wled00/wled00.ino
+++ b/wled00/wled00.ino
@@ -37,6 +37,9 @@
 //Hardware-settings (only changeble via code)
 #define LEDCOUNT 84
 uint8_t buttonPin = 0; //needs pull-up
+uint8_t auxPin = 16; //use e.g. for external relay
+uint8_t auxDefaultState = 0; //0: input 1: high 2: low
+uint8_t auxTriggeredState = 0; //0: input 1: high 2: low
 
 //AP and OTA default passwords (change them!)
 String appass = "wled1234";
@@ -133,6 +136,9 @@ boolean nixiePause;
 long countdownTime = 1483225200L;
 boolean arlsTimeout = false;
 long arlsTimeoutTime;
+uint8_t auxTime = 0;
+long auxStartTime;
+boolean auxActive, auxActiveBefore;
 
 ESP8266WebServer server(80);
 ESP8266HTTPUpdateServer httpUpdater;
diff --git a/wled00/wled03_set.ino b/wled00/wled03_set.ino
index 8d99086e6..7b51d29e7 100644
--- a/wled00/wled03_set.ino
+++ b/wled00/wled03_set.ino
@@ -281,6 +281,12 @@ boolean handleSet(String req)
         nightlightStartTime = millis();
       }
    }
+   pos = req.indexOf("AX=");
+   if (pos > 0) {
+        auxTime = req.substring(pos + 3).toInt();
+        auxActive = true;
+        if (auxTime == 0) auxActive = false;
+   }
    XML_response();
    if (effectUpdated)
    {
diff --git a/wled00/wled09_button.ino b/wled00/wled09_button.ino
index aa43c0cd8..b5ddf6940 100644
--- a/wled00/wled09_button.ino
+++ b/wled00/wled09_button.ino
@@ -28,4 +28,31 @@ void handleButton()
       }
     }
   }
+
+  //output
+  if (auxActive || auxActiveBefore)
+  {
+    if (!auxActiveBefore)
+    {
+      auxActiveBefore = true;
+      switch (auxTriggeredState)
+      {
+        case 0: pinMode(auxPin, INPUT); break;
+        case 1: pinMode(auxPin, OUTPUT); digitalWrite(auxPin, HIGH); break;
+        case 2: pinMode(auxPin, OUTPUT); digitalWrite(auxPin, LOW); break;
+      }
+      auxStartTime = millis();
+    }
+    if ((millis() - auxStartTime > auxTime*1000 && auxTime != 255) || !auxActive)
+    {
+      auxActive = false;
+      auxActiveBefore = false;
+      switch (auxDefaultState)
+      {
+        case 0: pinMode(auxPin, INPUT); break;
+        case 1: pinMode(auxPin, OUTPUT); digitalWrite(auxPin, HIGH); break;
+        case 2: pinMode(auxPin, OUTPUT); digitalWrite(auxPin, LOW); break;
+      }
+    }
+  }
 }