diff --git a/lib/treppe/treppe.cpp b/lib/treppe/treppe.cpp
index 4e4bb97..6ec4d44 100644
--- a/lib/treppe/treppe.cpp
+++ b/lib/treppe/treppe.cpp
@@ -149,6 +149,8 @@ void Treppe::setup(){
 
     pinMode(SENSOR1, INPUT);
     pinMode(SENSOR2, INPUT);
+    pinMode(OE, OUTPUT);
+    digitalWrite(OE, 0);
     Serial.println("Hello from Treppe");
     Serial.print("Treppe: initial parameters: stairs=");
     Serial.println(stairs);
@@ -188,8 +190,8 @@ void Treppe::task(){
 
   last_sensor_state[0] = current_sensor_state[0];
   last_sensor_state[1] = current_sensor_state[1];
+  
   ledsequence();
-
 }
 
 
diff --git a/lib/treppe/treppe.h b/lib/treppe/treppe.h
index cd3a612..ef9f36b 100644
--- a/lib/treppe/treppe.h
+++ b/lib/treppe/treppe.h
@@ -4,6 +4,7 @@
 
 #define SENSOR1 15
 #define SENSOR2 12
+#define OE 14
 
 #define INT_TIME 20         // interrupt intervall [ms]