diff --git a/doku.md b/doku.md
index 29a0b86..43ec0ad 100644
--- a/doku.md
+++ b/doku.md
@@ -66,3 +66,6 @@ LED Flickering issue
 https://github.com/NachtRaveVL/PCA9685-Arduino/issues/15
 
 PlatformIO Library veraltet
+
+
+###TIMER in OTA unterbrechen !!!!!
diff --git a/include/pwm.h b/include/pwm.h
index 68e7c3e..026947b 100644
--- a/include/pwm.h
+++ b/include/pwm.h
@@ -3,26 +3,41 @@
 #include "PCA9685.h"
 
 class Treppe {
-    private:
+private:
     uint8_t stairs;
-    uint16_t time_per_stair = 300;          // dimmtime per stair [ms]
-    uint16_t idle_brightness = 200;
-    uint16_t active_brightness = 2048;
+    uint16_t time_per_stair = 100;          // dimmtime per stair [ms]
+    uint16_t idle_brightness = 25;
+    uint16_t active_brightness = 500;
 
     uint8_t direction = 0;
     uint8_t state = 0;
     uint8_t switch_state = 0;
 
+    uint32_t tick = 0;
+    uint32_t stufe = 0;
+
+    uint32_t ticks_treppe = 0;
+    uint32_t ticks_pro_stufe = 0;
+    float differenz_pwm_pro_tick = 0.0;
+
     // initialize with i2c-Address 0, use Wire Library
     PCA9685 pwmController;     
     uint8_t softstart_led(uint8_t led, uint16_t startval, uint16_t stopval);
     void ledsequence();
 
-    public:
-    Treppe(uint8_t _stairs) : stairs(_stairs){}
+public:
+    Treppe(uint8_t _stairs) : stairs(_stairs){
+        ticks_pro_stufe = time_per_stair / 20; // [ms]
+        ticks_treppe = ticks_pro_stufe * stairs;
+
+        differenz_pwm_pro_tick = (active_brightness - idle_brightness) 
+                                            / ticks_pro_stufe;
+
+    }
     void task();        // call periodically
 
     void setup();
+    void elelel();
 
     // Parameter section
     uint16_t setIdle(uint16_t _idle_brightness);
diff --git a/src/main.cpp b/src/main.cpp
index c77f429..aa439a3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,7 +21,7 @@ extern "C" {
 #include "pwm.h"
 os_timer_t timer1;
 uint8_t timer_flag = 0;
-Treppe stairs(13);
+Treppe stairs(16);
 
 // WIFI
 const char* ssid = STASSID;
@@ -102,18 +102,25 @@ void setup() {
   Serial.println("PCA9685 connected !");
 
   os_timer_setfn(&timer1, timerCallback, &timer_flag);
-  os_timer_arm(&timer1, 20, true);
+  os_timer_arm(&timer1, 200, true);
 
   stairs.setState(1);
   stairs.setDirection(1);
 }
 
+
 void loop() {
-  if(millis() > 25000 && stairs.getState() == 1 && stairs.getDirection() == 1) stairs.setState(0);
-  if(millis() > 45000 && stairs.getDirection() == 1){
+  if(stairs.getState() == 0) {
+    delay(1000);
     stairs.setState(1);
-    stairs.setDirection(0);
+    stairs.setDirection(!stairs.getDirection());
   }
-  TIMEIF_US(ArduinoOTA.handle(), 1000, "OTA");
-  TIMEIF_US(httpServer.handleClient(), 1000, "HTTP");
+  
+  // if(millis() > 25000 && stairs.getState() == 1 && stairs.getDirection() == 1) stairs.setState(0);
+  // if(millis() > 35000 && stairs.getDirection() == 1){
+  //   stairs.setState(1);
+  //   stairs.setDirection(0);
+  // }
+  TIMEIF_US(ArduinoOTA.handle(), 10000, "OTA");
+  TIMEIF_US(httpServer.handleClient(), 10000, "HTTP");
 }
\ No newline at end of file
diff --git a/src/pwm.cpp b/src/pwm.cpp
index a217124..0b6fcf0 100644
--- a/src/pwm.cpp
+++ b/src/pwm.cpp
@@ -15,7 +15,7 @@ uint8_t Treppe::softstart_led(uint8_t led, uint16_t startval, uint16_t stopval){
 
     static uint8_t lastled = 255;
     static float current_pwm = 0;
-    static float stepsize = 1.0;
+    static float stepsize = 0.5;
     if(led != lastled){
       pwmController.setChannelPWM(led, (uint16_t)startval);
       lastled = led;
@@ -44,6 +44,7 @@ void Treppe::ledsequence(){
   static uint8_t finish = 1;
   static uint16_t status = 0;
   uint16_t status_build = 0;
+
   status_build |= direction << 8;
   status_build |= state;
   if(status_build != status){                 // check if any parameter changed
@@ -91,10 +92,55 @@ void Treppe::ledsequence(){
   }
 }
 
+
+
+void Treppe::elelel()
+{
+  if(state) {
+    if(direction) tick++;
+    else tick--;
+    
+    // was soll gemacht werden
+    pwmController.setChannelPWM(stufe, 
+      (uint16_t) (differenz_pwm_pro_tick * (tick % ticks_pro_stufe) + idle_brightness)
+    );
+    Serial.printf("tick %04d, led %02d:%02d, pwm %4.1f\n", 
+      tick,
+      tick / ticks_pro_stufe,
+      (tick % ticks_pro_stufe) , 
+      (differenz_pwm_pro_tick * (tick % ticks_pro_stufe) + idle_brightness)
+    );
+
+    if(tick < 0) {  // ziel erreicht
+      tick = 0;
+      state = 0;
+      return;
+    }
+    if(tick == ticks_treppe) {
+      tick = ticks_treppe-1;
+      state = 0;
+      return;
+    }
+
+    if(tick % ticks_pro_stufe == 0) {
+      if(direction) stufe++;
+      else stufe--;
+    }
+  }
+}
+
+    // if(stufe > stairs || stufe < 0 || tick < 0 || tick > ticks_treppe-1) {
+    //   Serial.println("[Treppe] ERROR, Something went wrong !");
+    //   state = 0;
+    //   return;
+    // }
+
 void Treppe::setup(){
+    Serial.printf("differenz_pwm_pro_tick %f\n", differenz_pwm_pro_tick);
+   
     pwmController.resetDevices();
     
-    // Deactive PCA9685 due to LED Flickering
+    // Deactivate PCA9685_PhaseBalancer due to LED Flickering
     // https://github.com/NachtRaveVL/PCA9685-Arduino/issues/15
     // see also lib/PCA9685-Arduin/PCA9685.h:204
     pwmController.init(PCA9685_PhaseBalancer_None);
@@ -102,9 +148,14 @@ void Treppe::setup(){
     Serial.println("Hello from Treppe");
     Serial.print("Treppe: initial parameters: stairs=");
     Serial.println(stairs);
+    
+    for(uint8_t i=0; i<stairs; i++) {
+        pwmController.setChannelPWM(i, idle_brightness); 
+    }
 }
 void Treppe::task(){
-    ledsequence();
+    //ledsequence();
+    elelel();
 }
 
 uint16_t Treppe::setIdle(uint16_t _idle_brightness){