diff --git a/lib/PCA9685-Arduino b/lib/PCA9685-Arduino
index a70be39..23e06c0 160000
--- a/lib/PCA9685-Arduino
+++ b/lib/PCA9685-Arduino
@@ -1 +1 @@
-Subproject commit a70be39257e317d35e9118b385006a1e030e6452
+Subproject commit 23e06c06a6026801a856141f64a6de54dd493b47
diff --git a/lib/treppe/treppe.cpp b/lib/treppe/treppe.cpp
index a46dc12..653d882 100644
--- a/lib/treppe/treppe.cpp
+++ b/lib/treppe/treppe.cpp
@@ -198,7 +198,7 @@ void Treppe::task(){
   last_sensor_state[1] = current_sensor_state[1];
   
   ledsequence();
-
+  //Serial.printf("LDR: %f\n", ((float)analogRead(A0))/1023.*3.68);
 }
 
 
diff --git a/src/main.cpp b/src/main.cpp
index f00950e..808cfe4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -42,7 +42,10 @@ void timerCallback(void *pArg)
 }
 
 // ===============================================
-
+uint8_t inter = 0;
+ICACHE_RAM_ATTR void int_test(){
+  inter = 1;
+}
 
 void setup() {
 #ifdef WITH_DEBUGGING_ON
@@ -84,6 +87,8 @@ void setup() {
 
   stairs.setup();
   Serial.println("PCA9685 connected !");
+  //attachInterrupt(digitalPinToInterrupt(2), int_test, RISING);
+  //attachInterrupt(digitalPinToInterrupt(12), int_test, RISING);
 
   os_timer_setfn(&timer1, timerCallback, &timer_flag);
   os_timer_arm(&timer1, 20, true);
@@ -106,6 +111,10 @@ void loop() {
   //   stairs.setDirection(!stairs.getDirection());
   //   stairs.setState(1);
   // }
+  if(inter){
+    Serial.printf("interrupt\n");
+    inter = 0;
+  }
   if(c++%1000000 == 0)
     httpServer.logt("[%d] starting :)\n", c);