diff --git a/doku.md b/doku.md
index 43ec0ad..f1665a3 100644
--- a/doku.md
+++ b/doku.md
@@ -54,6 +54,12 @@ else
     server.streamFile(f, mime::getContentType(SRH::_path), requestMethod);
 ```
 
+LED_sequence_v1:
+TODO: 
+- disable led stripes after defined time (webserver paramter?)
+- define what to do if people enter stairs from different directions
+- CAUTION: Sensor-Deadtime at LEAST 8 seconds
+- --> switch off with person leaving stairs might not be possible
 
 Webserver on v0.3.0 now working with LittleFS
 TODO:
diff --git a/lib/treppe/treppe.cpp b/lib/treppe/treppe.cpp
index 2fb6612..6059e50 100644
--- a/lib/treppe/treppe.cpp
+++ b/lib/treppe/treppe.cpp
@@ -159,7 +159,7 @@ void Treppe::setup(){
 
 void Treppe::task(){
     //ledsequence();
-    elelel();
+    task_2();
 }
 
 uint16_t Treppe::setIdle(uint16_t _idle_brightness){
diff --git a/lib/treppe/treppe.cpp~HEAD b/lib/treppe/treppe.cpp~HEAD
new file mode 100644
index 0000000..c08afe5
--- /dev/null
+++ b/lib/treppe/treppe.cpp~HEAD
@@ -0,0 +1,256 @@
+#include "treppe.h"
+
+uint8_t Treppe::softstart_led(uint8_t led, uint16_t startval, uint16_t stopval){
+    /*
+  softstart task
+
+  - get's called at regular intervals (1ms at the moment)
+  - dimms single led (0 - 15, PCA9685 outputs) with linear intervals vom startval to stopval
+  - calculates pwm steps depending on startval, stopval and timeinterval
+  - -> results in constanst speed
+  - returns 1 if led dimming is running
+  - returns 0 if led dimming is finished
+
+  */
+
+    static uint8_t lastled = 255;
+    static float current_pwm = 0;
+    static float stepsize = 0.5;
+    if(led != lastled){
+      pwmController.setChannelPWM(led, (uint16_t)startval);
+      lastled = led;
+      current_pwm = startval;
+      stepsize = INT_TIME*abs(stopval - startval)/(float)time_per_stair;      // only valid at 1ms function call interval
+      return 1;
+    }
+    
+    if(startval > stopval){
+      current_pwm -= stepsize;
+    }
+    else {
+      current_pwm += stepsize;
+    }
+    Serial.println((uint16_t)current_pwm);
+    pwmController.setChannelPWM(led, (uint16_t)current_pwm);
+    if(current_pwm > stopval - stepsize && current_pwm < stopval + stepsize){
+      if(stopval == 0) pwmController.setChannelPWM(led, 0);
+      return 0;
+    } 
+    return 1;
+}
+
+void Treppe::ledsequence(){
+  static int8_t led = 0;
+  static uint16_t brightness = 0;
+  static uint16_t lastbrightness = 0;
+  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
+    finish = 0;                               // set state unfinished -> start action
+    if(direction) led = 0;                    // reset led counter depending of direction
+    else          led = stairs-1;
+    if(state){
+      brightness = active_brightness;           // set brightness value depending of on/off
+      lastbrightness = idle_brightness;
+    }     
+    else{
+      brightness = idle_brightness;
+      lastbrightness = active_brightness;
+    }          
+    status = status_build;                    // set parameter memory
+    Serial.print("----Status Changed! onoff: ");
+    Serial.print(state);
+    Serial.print(" dir: ");
+    Serial.println(direction);
+
+  }
+  if(!finish){                                // finish == 0 -> action pending
+      if(!softstart_led(led,lastbrightness, brightness)){
+        Serial.print("one LED finished: ");
+        Serial.print(led);
+        Serial.print(" last: ");
+        Serial.print(lastbrightness);
+        Serial.print(" curr: ");
+        Serial.println(brightness);
+        if(direction){
+          led++;
+          if(led >= stairs) {
+            finish = 1;
+            //lastbrightness = brightness;
+            }
+        } 
+        else{
+           led--;
+           if(led < 0){
+             //lastbrightness = brightness;
+             finish = 1;
+            }
+        }
+      }
+  }
+}
+
+
+
+
+
+void Treppe::elelel()
+{
+  if(state) {
+    if(direction) { // aufwärts
+      if(tick >= ticks_treppe-1) { // ziel erreicht
+        Serial.println("[Treppe] oberster tick !");
+        state = 0;
+        return;
+      }
+      tick++;  // eins hoch
+    }
+    else {  // abwärts
+      if(tick <= 0) { // ziel erreicht
+        Serial.println("[Treppe] unterster tick !");
+        state = 0;
+        return;
+      }
+      tick--;  // eins runter
+    }
+
+    stufe = tick / ticks_pro_stufe;
+    float new_pwm = differenz_pwm_pro_tick * (tick - ticks_pro_stufe*stufe);
+    if(direction)
+      new_pwm += differenz_pwm_pro_tick;
+    new_pwm += idle_brightness;
+
+    pwmController.setChannelPWM(stufe, (uint16_t) new_pwm);
+    Serial.printf("tick %04u, led %02d:%02u, pwm %4.1f\n", 
+      tick,
+      stufe,
+      (tick - ticks_pro_stufe*stufe), 
+      new_pwm
+    );
+  }
+}
+
+// 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();
+    
+<<<<<<< HEAD:lib/treppe/treppe.cpp
+    // Deactivate PCA9685_PhaseBalancer due to LED Flickering
+=======
+    // Deactive PCA9685 Phase Balancer due to LED Flickering
+>>>>>>> master:src/pwm.cpp
+    // https://github.com/NachtRaveVL/PCA9685-Arduino/issues/15
+    // see also lib/PCA9685-Arduin/PCA9685.h:204
+    pwmController.init(PCA9685_PhaseBalancer_None);
+    pwmController.setPWMFrequency(200);
+    pwmController.setAllChannelsPWM(idle_brightness);
+
+    pinMode(SENSOR1, INPUT);
+    pinMode(SENSOR2, INPUT);
+    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(){
+<<<<<<< HEAD:lib/treppe/treppe.cpp
+    //ledsequence();
+    elelel();
+=======
+
+  if(finish){
+    direction = switch_direction;
+    state = switch_state;
+  }  
+  static uint8_t last_sensor_state[2] = {0,0}; 
+  uint8_t current_sensor_state[2] = {0,0};
+  current_sensor_state[0] = digitalRead(SENSOR1);
+  current_sensor_state[1] = digitalRead(SENSOR2);
+  
+  if(current_sensor_state[0] && !last_sensor_state[0] && state == 0){
+    setDirection(1);
+    setState(1);
+  }
+
+  if(current_sensor_state[1] && !last_sensor_state[1] && state == 0){
+    setDirection(0);
+    setState(1);
+  }
+
+  // first switch - off approach, use timer later
+  if(!current_sensor_state[0] && last_sensor_state[0] && state == 1){
+    setDirection(1);
+    setState(0);
+  }
+
+  if(!current_sensor_state[1] && last_sensor_state[1] && state == 1){
+    setDirection(0);
+    setState(0);
+  }
+
+  last_sensor_state[0] = current_sensor_state[0];
+  last_sensor_state[1] = current_sensor_state[1];
+  ledsequence();
+
+>>>>>>> master:src/pwm.cpp
+}
+
+uint16_t Treppe::setIdle(uint16_t _idle_brightness){
+    idle_brightness = _idle_brightness;
+    Serial.println("Treppe: idle brightness changed!");
+    return idle_brightness;
+}
+uint16_t Treppe::setActive(uint16_t _active_brightness){
+    active_brightness = _active_brightness;
+    Serial.println("Treppe: active brightness changed!");
+    return active_brightness;
+}
+uint16_t Treppe::setTime(uint16_t _time_per_stair){
+    time_per_stair = _time_per_stair;
+    Serial.println("Treppe: time changed!");
+    return time_per_stair;
+}
+
+uint8_t Treppe::setDirection(uint8_t _direction){
+<<<<<<< HEAD:lib/treppe/treppe.cpp
+    direction = _direction;
+    Serial.printf("Treppe: Direction: %d!\n",direction);
+=======
+    switch_direction = _direction;
+    Serial.println("Treppe: Direction changed!");
+    if(finish) Serial.println("apply direction request immediately");
+    else  Serial.println("currently active, dir change afterwards");
+>>>>>>> master:src/pwm.cpp
+    // to do: implement state command variable to determine dimm-state
+    return switch_direction;
+}
+
+uint8_t Treppe::setState(uint8_t _state){
+    if(state == _state) return 1;
+    else{
+<<<<<<< HEAD:lib/treppe/treppe.cpp
+        state = _state;
+        Serial.printf("Treppe: State: %d!\n",state);
+=======
+        switch_state = _state;
+        Serial.println("Treppe: State Request changed!");
+        if(finish) Serial.println("apply state request immediately");
+        else Serial.println("currently active, state changes after activity");
+>>>>>>> master:src/pwm.cpp
+    }  
+    return 0;
+}
diff --git a/lib/treppe/treppe.h b/lib/treppe/treppe.h
index 1246728..7992d86 100644
--- a/lib/treppe/treppe.h
+++ b/lib/treppe/treppe.h
@@ -37,7 +37,7 @@ public:
     void task();        // call periodically
 
     void setup();
-    void elelel();
+    void task_2();
 
     // Parameter section
     uint16_t setIdle(uint16_t _idle_brightness);
diff --git a/lib/treppe/treppe.h~HEAD b/lib/treppe/treppe.h~HEAD
new file mode 100644
index 0000000..c555c11
--- /dev/null
+++ b/lib/treppe/treppe.h~HEAD
@@ -0,0 +1,73 @@
+#pragma once
+
+#include "PCA9685.h"
+
+#define SENSOR1 15
+#define SENSOR2 12
+
+#define INT_TIME 20         // interrupt intervall [ms]
+class Treppe {
+private:
+    uint8_t stairs;
+<<<<<<< HEAD:lib/treppe/treppe.h
+    uint16_t time_per_stair = 300;          // dimmtime per stair [ms]
+    uint16_t idle_brightness = 0;
+    uint16_t active_brightness = 500;
+=======
+    uint16_t time_per_stair = 200;          // dimmtime per stair [ms]
+    uint16_t idle_brightness = 0;
+    uint16_t active_brightness = 1048;
+>>>>>>> master:include/pwm.h
+
+    uint8_t direction = 0;
+    uint8_t switch_direction = 0;
+    uint8_t state = 0;
+    uint8_t switch_state = 0;
+    uint8_t finish = 1;
+
+    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){
+        ticks_pro_stufe = time_per_stair / 20; // [ms]
+        ticks_treppe = ticks_pro_stufe * stairs;
+
+        differenz_pwm_pro_tick = (float) (active_brightness - idle_brightness) 
+                                            / (float) ticks_pro_stufe;
+    }
+
+    void task();        // call periodically
+
+    void setup();
+    void elelel();
+
+    // Parameter section
+    uint16_t setIdle(uint16_t _idle_brightness);
+    uint16_t setActive(uint16_t _active_brightness);
+    uint16_t setTime(uint16_t _time_per_stair);
+
+    void setTick(uint32_t _tick) {
+        tick = _tick;
+        Serial.printf("Treppe: Tick: %u!\n", tick);
+    }    
+    uint32_t getTicks() {
+        return ticks_treppe;
+    }
+
+    // Runtime Parameter section
+    uint8_t setDirection(uint8_t _direction);
+    uint8_t setState(uint8_t _state);
+
+    uint8_t getState() { return state;};
+    uint8_t getDirection() {return direction;};
+};
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index dd8c09e..03f850b 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -103,9 +103,6 @@ void setup() {
 
   os_timer_setfn(&timer1, timerCallback, &timer_flag);
   os_timer_arm(&timer1, 20, true);
-
-  stairs.setState(1);
-  stairs.setDirection(1);
 }
 
 #include <random>