diff --git a/data/Background.png b/data/Background.png
deleted file mode 100644
index 9d8f919..0000000
Binary files a/data/Background.png and /dev/null differ
diff --git a/data/index.html b/data/index.html
index eeab828..7d09da4 100644
--- a/data/index.html
+++ b/data/index.html
@@ -3,71 +3,44 @@
 
 <head>
   <title>ESP8266 Treppenlicht</title>
-  <!-- main style sheet -->
   <link href="/favicon.png" rel="icon" type="image/png" sizes="10x10">
   <link href="/style.css" rel="stylesheet" type="text/css">
 </head>
 
 <body>
-  <div class="kopfzeile" style="text-align: center;">
-    <b>Treppenlicht</b>
-  </div>
-  <!--
-  <div class="ueberschrift">
-    Helligkeit
-    label id="label_pwm">
-      </label>
+  <div class="topbar">Treppenlicht</div>
+
+  <div class="param_block">
+    Active Brightness: <output id="out_act_pwm" class="val_range">50</output> %
     <div class="slider">
-      <input type="range" class="regler" id="helligkeit" name="rangeInput" min="0" max="100" value="50"
-        oninput="amount1.value=helligkeit.value">
-      <br>
-      <output name="amount1" id="amount1" for="helligkeit">50</output>
-    </div>
-  </div>-->
-  <form class="ueberschrift">
-    <div class="BridhgtnessInputGroup">
-      <label for="brightness"> Helligkeitswert in %:</label>
-      <input id="brightness" type="number" name="brightness" step="1" min="0" max="100" placeholder="zB. 50" required>
-      <span class="validity"></span>
-      <button type="button" onclick="getInputValue()">Speichern</button>
-      
-      <script>
-        function getInputValue(){
-          var helligkeit= document.getElementById("brightness").value;
-          if (helligkeit > 100 | helligkeit < 0)
-          alert("Helligkeit darf nicht groesser 100 oder kleiner 0 sein")
-          else alert(helligkeit);
-        }
-      </script>
-    </div>
-  </form>
-
-
-<!--
-  < div class="ueberschrift" >
-        Helligkeit bei Dunkelheit
-          < !--< label id = "label_pwm_dark" >
-      </label > 
-        <div class="slider">
-          <input type="range" class="regler" id="helligkeit_dunkel" name="rangeInput" min="0" max="100" value="50"
-            oninput="amount2.value=helligkeit_dunkel.value">
-            <br>
-              <output name="amount2" id="amount2" for="helligkeit_dunkel">50</output>
+      <input type="range" class="regler" id="range_act_pwm" min="0" max="100" value="50">
     </div>
   </div>
 
-          <div class="ueberschrift">
-            Laufgeschwindigkeit
-            <!--<label id="label_geschwindigkeit">
-            </label>
-            <div class="slider">
-              <input type="range" class="regler" id="geschwindigkeit" name="rangeInput" min="0" max="100" value="50"
-                oninput="amount3.value=geschwindigkeit.value">
-                <br>
-                  <output name="amount3" id="amount3" for="geschwindigkeit">50</output>
+
+  <div class="param_block">
+    Idle Brightness: <output id="out_idl_pwm" class="val_range">50</output> %
+    <div class="slider">
+      <input type="range" class="regler" id="range_idl_pwm" min="0" max="100" value="50">
     </div>
   </div>
 
+  <div class="param_block">
+    Time per stair: <output id="out_tim_sta" class="val_range">50</output> %
+    
+    <div class="slider">
+      <input type="range" class="regler" id="range_tim_sta" min="0" max="100" value="50">
+    </div>
+  </div>
+
+  <div class="param_block">
+    On Time: <output id="out_tim_on" class="val_range">50</output> %
+    <div class="slider">
+      <input type="range" class="regler" id="range_tim_on" min="0" max="100" value="50">
+    </div>
+    
+  </div>
+
               <div class="ueberschrift">
                 Licht-An-Zeit
                 <!--  <label id="label_time">
diff --git a/data/input.js b/data/input.js
index 0ea34c2..90f546a 100644
--- a/data/input.js
+++ b/data/input.js
@@ -1,12 +1,54 @@
-// var slider = document.getElementById("helligkeit");
-// var output = document.getElementById("l_pwm");
-// output.innerHTML = slider.value; // Display the default slider value
+let rangeValues = {};
+let xhrUpd = new XMLHttpRequest();
 
-// // Update the current slider value (each time you drag the slider handle)
-// slider.oninput = function() {
-//   output.innerHTML = this.value;
-// }
+xhrUpd.onreadystatechange = function(){
+  if(xhrUpd.readyState == 4) {
+    if (xhrUpd.status == 200){
+      console.log(xhrUpd.responseText);
+    }
+    else {
+      console.log("status:", xhrUpd.status);
+    }
+  }
+}
 
+function reloadRangeValues() {
+  let url = "/update";
+  // if there are scheduled updates, send them
+  if(Object.keys(rangeValues).length > 0) {
+    let params = [];
+    for(let p in rangeValues)
+      params.push(encodeURIComponent(p) + "=" + encodeURIComponent(rangeValues[p]));
+    params = params.join("&");
+
+    xhrUpd.open("POST", url, true);
+    xhrUpd.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
+    xhrUpd.send(params);
+
+    rangeValues = {};
+  }
+
+  setTimeout(reloadRangeValues, 1000);
+};
+reloadRangeValues();
+
+function sendRangeValue(range, val) {
+  rangeValues[range] = val;
+  console.log(rangeValues);
+};
+
+// connect actions to range inputs
+function rangeToOutput(range, output) {
+  document.getElementById(range).oninput = function() {
+    document.getElementById(output).innerHTML = this.value;
+    sendRangeValue(this.id, this.value);
+  }
+}
+
+rangeToOutput("range_act_pwm", "out_act_pwm");
+rangeToOutput("range_idl_pwm", "out_idl_pwm");
+rangeToOutput("range_tim_sta", "out_tim_sta");
+rangeToOutput("range_tim_on", "out_tim_on");
 
 
 let xhr = new XMLHttpRequest();
@@ -26,15 +68,12 @@ xhr.onreadystatechange = function(){
     }
   }
 }
-
 function reloadTerminal() {
-  xhr.open("POST", "/app=terminal", true);
+  xhr.open("POST", "/terminal", true);
   xhr.send();
   setTimeout(reloadTerminal, 1000);
 };
-
 reloadTerminal();
-
 function clearTerminal() {
   document.getElementById("term").innerHTML = '';
 }
diff --git a/data/style.css b/data/style.css
index b519172..96e0d70 100644
--- a/data/style.css
+++ b/data/style.css
@@ -1,44 +1,44 @@
 html {
   font-size: 16px;
   font-family: sans-serif, Arial, Helvetica;
-  background-color: #d4d4d4;
+  background-color: #ffffff;
   height: 100%;
-  /* background-image: url('Background.png'); */
-  background-repeat: repeat;
-  background-size: 150% 150%;
 }
 
 body {
   height: 100%;
-  margin: 0 auto;
-  border: none;
   border-radius: 3;
 }
 
 .topbar {
-  padding: 1em;
-  background-color: #1f1f1f;
+  padding: 10px;
+  background-color: #585858;
   color: white;
-  font-size: x-large;
+  font-size: xx-large;
   text-align: center;
 }
 
-.ueberschrift{
-  color: #ffffff;
-  font-size: 50px;
-  width: 100%;
-  text-align: center;
+.param_block{
+  padding: 1em;
+  color: #000000;
+  border: 1px solid darkred;
+  font-size: x-large;
+  width: 80%;
+}
+
+.val_range {
+  font-weight: bold;
 }
 
 .regler{
-  -webkit-appearance: none;
-  height: 30px;
+  /* -webkit-appearance: none; */
+  height: 50px;
   width: 100%;
   border-radius: 20px;
   outline: black;
   background-color: rgb(176, 188, 228);
 }
-.regler::-webkit-slider-thumb{
+/* .regler::-webkit-slider-thumb{
   -webkit-appearance: none;
   appearance: none;
   width: 5%;
@@ -46,25 +46,54 @@ body {
   border-radius: 10px;
   background-color: rgb(107, 122, 192);
   cursor:pointer;
-}
-input[type=range]::-webkit-slider-thumb{
+} */
+/* input[type=range]::-webkit-slider-thumb{
   -webkit-appearance: none;
   border:none;
   height: 30px;
   width: 4%;
   border-radius: 30px;
-}
+} */
+
 .slider {
-  width: 100%;
+  margin: 1%;
 }
 
-.kopfzeile{
-  color: #1f1f1f;
-  font-size: 50px;
-  width: 100%;
-  background-color: #8d8a8a;
+
+/*-------------------------------------------------------*/
+/*Switch:
+.switch {
+  position: relative;
+  display: inline-block;
+  width: 60px;
+  height: 34px;
 }
 
+Hide default HTML checkbox
+.switch input {
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+*/
+/* The slider */
+
+
+/*input:checked + .slider {
+  background-color: #04AA6D;
+}
+
+input:focus + .slider {
+  box-shadow: 0 0 1px #04AA6D;
+}*/
+/*
+input:checked + .slider:before {
+  -webkit-transform: translateX(26px);
+  -ms-transform: translateX(26px);
+  transform: translateX(26px);
+}
+*/
+
 .terminal {
   margin:5%;
   padding: 1%;
diff --git a/lib/PCA9685-Arduino b/lib/PCA9685-Arduino
index 23e06c0..a70be39 160000
--- a/lib/PCA9685-Arduino
+++ b/lib/PCA9685-Arduino
@@ -1 +1 @@
-Subproject commit 23e06c06a6026801a856141f64a6de54dd493b47
+Subproject commit a70be39257e317d35e9118b385006a1e030e6452
diff --git a/lib/httpserver/filesys.cpp b/lib/httpserver/filesys.cpp
index 2e2b1aa..1759a79 100644
--- a/lib/httpserver/filesys.cpp
+++ b/lib/httpserver/filesys.cpp
@@ -121,8 +121,4 @@ void deleteFile(const char * path) {
   } else {
     Serial.println("Delete failed");
   }
-}
-
-
-
- 
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/lib/httpserver/filesys.h b/lib/httpserver/filesys.h
index da4a754..09a94db 100644
--- a/lib/httpserver/filesys.h
+++ b/lib/httpserver/filesys.h
@@ -3,7 +3,6 @@
 #include <LittleFS.h>
 
 // some usefull wrappers for Filesystem
-
 bool mount_fs();
 bool format_fs();
 
diff --git a/lib/httpserver/httpserver.cpp b/lib/httpserver/httpserver.cpp
index cba3375..c9820a7 100644
--- a/lib/httpserver/httpserver.cpp
+++ b/lib/httpserver/httpserver.cpp
@@ -58,11 +58,28 @@ void HTTPServer::logt(const char *format, ...) {
 
 void HTTPServer::start_apps() {
     // application handler
-    this->on("/app=terminal", HTTP_POST, [this]() {
+
+    this->on("/update", HTTP_POST, [this]() {
+        if(args()) {
+            for(int i=0; i<args()-1; i++) {
+                Serial.printf("%s=%s\n", argName(i).c_str(), arg(i).c_str());
+                if(argName(i).equals("range_idl_pwm")) {
+                    treppe->set_idle_prozent(arg(i).toInt());
+                }
+            }
+        }
+        send(200, "text/plain", "accepted");
+    });
+
+    this->on("/terminal", HTTP_POST, [this]() {
+        // Serial.printf("got /terminal\n");
         if(tbuf_head) {
             send(200, "text/plain", tbuf);
             tbuf_head = 0;
         }
+        else {
+            send(202, "text/plain", "");
+        }
     });
 
 }
\ No newline at end of file
diff --git a/lib/httpserver/httpserver.h b/lib/httpserver/httpserver.h
index e54bbb7..9eb3ca1 100644
--- a/lib/httpserver/httpserver.h
+++ b/lib/httpserver/httpserver.h
@@ -5,6 +5,7 @@
 #include <ESP8266WebServer.h>
 #include <stdarg.h>
 #include "filesys.h"
+#include "treppe.h"
 
 // debug log <ESP8266WebServer.h>
 // #define DEBUGV(f,...) do { Serial.printf(PSTR(f), ##__VA_ARGS__); } while (0)
@@ -24,10 +25,11 @@ private:
     void listRoot() {
         ls(rootDir);
     }
+    Treppe* treppe;
 
 public:
-    HTTPServer(const int _port, const char* _rootDir) :
-       ESP8266WebServer(_port), rootDir(_rootDir)
+    HTTPServer(const int _port, const char* _rootDir, Treppe* _treppe) :
+       ESP8266WebServer(_port), rootDir(_rootDir), treppe(_treppe)
     { }
     ~HTTPServer()
     {
diff --git a/lib/treppe/treppe.cpp b/lib/treppe/treppe.cpp
index 9cb1e85..ffc518b 100644
--- a/lib/treppe/treppe.cpp
+++ b/lib/treppe/treppe.cpp
@@ -1,9 +1,8 @@
 #include "treppe.h"
 
 /*
-    dimm_stufe
     - dimmt stufe (0 - 15, PCA9685 outputs) mit linearen ticks
-    von idle bis active brightness
+    von idle bis active pwm
     - return false solange gedimmt wird
     - return true bei nächster stufe
 */
@@ -13,6 +12,7 @@ bool Treppe::dimm_stufe(uint8_t stufe)
     current_pwm += differenz_pwm_pro_tick;
   else
     current_pwm -= differenz_pwm_pro_tick;
+  Serial.printf("dimm_stufe %d %f\n", stufe, current_pwm);
   pwmController.setChannelPWM(stufe, static_cast<uint16_t>(current_pwm));
 
   current_tick++;
@@ -21,8 +21,21 @@ bool Treppe::dimm_stufe(uint8_t stufe)
   return true;
 }
 
+
+/*
+    - dimmt treppe (all PCA9685 outputs) mit linearen ticks
+    von idle bis active brightness
+    - return false solange gedimmt wird
+    - return true bei ende
+*/
+bool Treppe::dimm_treppe()
+{
+  // needs to be in state machine
+  return true;
+}
+
+
 /*
-    animation tick
     - nach dem dimmen einer stufe wird die stufe weitergezählt
     - abbruch am ende => anim_beendet = true;
 */
@@ -68,13 +81,13 @@ void Treppe::start_animation()
 
   if (fsm_outputs.dimmrichtung == DR_AUFDIMMEN)
   {
-    start_pwm = idle_brightness;
-    ziel_pwm = active_brightness;
+    start_pwm = idle_pwm_internal;
+    ziel_pwm = active_pwm;
   }
   else
   {
-    start_pwm = active_brightness;
-    ziel_pwm = idle_brightness;
+    start_pwm = active_pwm;
+    ziel_pwm = idle_pwm_internal;
   }
 
   current_tick = 0;
@@ -112,12 +125,12 @@ bool Treppe::read_sensor(int sensor)
 {
 
   /*
-        reads sensors with edge detection
-        
-        returns true if motion was detected
-        returns false if no motion was detected
-        returns false if motion was detected, but state did not change back to not detected
-        */
+  reads sensors with edge detection
+  
+  returns true if motion was detected
+  returns false if no motion was detected
+  returns false if motion was detected, but state did not change back to not detected
+  */
   uint8_t pegel = digitalRead(sensor);
   static uint8_t pegel_alt[2] = {0, 0};
 
@@ -169,11 +182,12 @@ float Treppe::read_ldr()
          = 37280.00/analogRead(A0)
   ldr_ohm = R(LDR)
 
-  E(LDR) = 79.735 * R(LDR)^-0.498   (see Excel Regression)
+  E(LDR) = 6526.5 * R(LDR)^-2   (see Excel Regression)
+  E(LDR) = 6526.5 / (R(LDR)^2)
   ldr_value = E(LDR)
   */
   float ldr_ohm = 37280.00 / analogRead(A0);
-  float ldr_value = 79.735 * pow(ldr_ohm, -0.498);
+  float ldr_value = 6526.6/(ldr_ohm*ldr_ohm);
   return ldr_value;
 }
 
@@ -192,7 +206,7 @@ bool Treppe::check_ldr()
     active = 1;
   if (ldr > ldr_schwelle + LDR_HYS)
     active = 0;
-
+  activate_idle_pwm(active);
   return active;
 }
 
@@ -212,8 +226,11 @@ void Treppe::task()
   if (fsm_outputs.status > ST_RUHEZUSTAND)
   {
     if (anim_beendet == true &&
-        (fsm_outputs.status == ST_AUFDIMMEN_HOCH || fsm_outputs.status == ST_ABDIMMEN_HOCH ||
-         fsm_outputs.status == ST_AUFDIMMEN_RUNTER || fsm_outputs.status == ST_ABDIMMEN_RUNTER))
+        (fsm_outputs.status == ST_AUFDIMMEN_HOCH || 
+         fsm_outputs.status == ST_ABDIMMEN_HOCH  ||
+         fsm_outputs.status == ST_AUFDIMMEN_RUNTER || 
+         fsm_outputs.status == ST_ABDIMMEN_RUNTER)
+       )
     {
       start_animation();
     }
@@ -225,7 +242,9 @@ void Treppe::task()
 void Treppe::berechne_dimmer()
 {
   ticks_pro_stufe = time_per_stair / INT_TIME; // [ms]
-  differenz_pwm_pro_tick = (float)(active_brightness - idle_brightness) / (float)ticks_pro_stufe;
+  differenz_pwm_pro_tick = (float)(active_pwm - idle_pwm_internal) 
+                                / (float)ticks_pro_stufe;
+
 }
 
 void Treppe::setup()
@@ -237,7 +256,7 @@ void Treppe::setup()
   pwmController.init(PCA9685_PhaseBalancer_None);
   //pwmController.init(PCA9685_PhaseBalancer_Linear);
   pwmController.setPWMFrequency(100);
-  pwmController.setAllChannelsPWM(idle_brightness);
+  //pwmController.setAllChannelsPWM(idle_pwm);
 
   pinMode(A0, INPUT);
   pinMode(SENSOR_OBEN, INPUT);
@@ -249,19 +268,46 @@ void Treppe::setup()
   Serial.printf("Treppe: initial parameters: stufen=%d\n", stufen);
 }
 
-// ###################################################################################################################
-// GEBUFFERT => Erst im Ruhezustand übernehmen !!!!
-void Treppe::set_idle_pwm(uint16_t _idle_brightness)
-{
-  idle_brightness = _idle_brightness;
-  berechne_dimmer();
-  Serial.printf("Treppe: idle_brightness=%d\n", idle_brightness);
+void Treppe::set_idle_prozent(int prozent) {
+  uint16_t new_pwm = active_pwm * prozent / 100;
+  set_idle_pwm(new_pwm);
 }
-void Treppe::set_active_pwm(uint16_t _active_brightness)
+
+void Treppe::set_idle_pwm(uint16_t new_idle_pwm)
 {
-  active_brightness = _active_brightness;
+  if(new_idle_pwm > active_pwm) {
+    idle_pwm = active_pwm;
+  } else {
+    idle_pwm = new_idle_pwm;
+  }
+
+  Serial.printf("Treppe: idle_pwm=%d\n", idle_pwm);
   berechne_dimmer();
-  Serial.printf("Treppe: active_brightness=%d\n", active_brightness);
+  activate_idle_pwm(true);
+}
+
+void Treppe::activate_idle_pwm(bool active)
+{
+  static uint16_t last_pwm = 0;
+
+  if (fsm_outputs.status == ST_RUHEZUSTAND || fsm_outputs.status == ST_INAKTIV_LDR)
+  {
+    idle_pwm_internal = idle_pwm * active;
+    if (idle_pwm_internal != last_pwm)
+    {
+      // Dimming Function for all LEDS ?
+      berechne_dimmer();
+      pwmController.setAllChannelsPWM(idle_pwm_internal);
+      last_pwm = idle_pwm_internal;
+    }
+  }
+}
+
+void Treppe::set_active_pwm(uint16_t _active_pwm)
+{
+  active_pwm = _active_pwm;
+  berechne_dimmer();
+  Serial.printf("Treppe: active_pwm=%d\n", active_pwm);
 }
 void Treppe::set_time_per_stair(uint16_t _time_per_stair)
 {
diff --git a/lib/treppe/treppe.h b/lib/treppe/treppe.h
index ea3d0c6..b5a1093 100644
--- a/lib/treppe/treppe.h
+++ b/lib/treppe/treppe.h
@@ -5,9 +5,9 @@
 
 // #define LDRDEBUG  // comment in to override LDR measurement 
 
-#define LDR_HYS 5.0  // Hysteresis for switching off FSM [lux]
+#define LDR_HYS 1  // Hysteresis for switching off FSM [lux]
 
-#define SENSOR_OBEN 2
+#define SENSOR_OBEN 16
 #define SENSOR_UNTEN 12
 #define OE 14
 
@@ -17,10 +17,11 @@ class Treppe {
 private:
     const uint8_t stufen;
     uint16_t time_per_stair = 300;  // dimmtime per stair [ms]
-    uint16_t idle_brightness = 0;
-    uint16_t active_brightness = 500;
+    uint16_t idle_pwm = 100;
+    uint16_t idle_pwm_internal = 0;
+    uint16_t active_pwm = 700;
 
-    uint16_t ldr_schwelle = 7;      // activation value for FSM [lx]
+    uint16_t ldr_schwelle = 2;      // activation value for FSM [lx]
 
     uint16_t start_pwm = 0;
     uint16_t ziel_pwm  = 0;
@@ -32,17 +33,11 @@ private:
     uint16_t ticks_pro_stufe = 0;
     float differenz_pwm_pro_tick = 0.0;
     
-    bool dimm_stufe(uint8_t stufe);
-    void anim_tick();
-    void start_animation();
-    void berechne_dimmer();
-
     // initialize with i2c-Address 0, use Wire Library
     PCA9685 pwmController;     
     FSMTreppeModelClass FSMTreppe_Obj;
     FSMTreppeModelClass::ExtU_FSMTreppe_T fsm_inputs;
     FSMTreppeModelClass::ExtY_FSMTreppe_T fsm_outputs;
-    void print_state_on_change();
     enum fsm_status_t {
         ST_INAKTIV_LDR      =0,
         ST_RUHEZUSTAND      =1,
@@ -62,6 +57,15 @@ private:
         DR_AUFDIMMEN=1
     };
 
+    /* DIMM */
+    bool dimm_stufe(uint8_t stufe);
+    bool dimm_treppe();
+    void anim_tick();
+    void start_animation();
+    void berechne_dimmer();
+    void print_state_on_change();
+
+    /* LDR */
     bool read_sensor(int sensor);
     float read_ldr();
     bool check_ldr();
@@ -78,7 +82,9 @@ public:
     void task();        // call periodically
 
     // Parameter section
-    void set_idle_pwm(uint16_t _idle_brightness);
-    void set_active_pwm(uint16_t _active_brightness);
+    void set_idle_prozent(int prozent);
+    void set_idle_pwm(uint16_t _idle_pwm);
+    void activate_idle_pwm(bool active);
+    void set_active_pwm(uint16_t _active_pwm);
     void set_time_per_stair(uint16_t _time_per_stair);
 };
\ No newline at end of file
diff --git a/misc/LDR-Regression.xlsx b/misc/LDR-Regression.xlsx
index bb499cc..515f7c3 100644
Binary files a/misc/LDR-Regression.xlsx and b/misc/LDR-Regression.xlsx differ
diff --git a/src/main.cpp b/src/main.cpp
index dc5b5e5..fc5bf63 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,7 +28,7 @@ const char* ssid = STASSID;
 const char* password = STAPSK;
 
 // port 80, root directory of server '/'
-HTTPServer httpServer(80, "/");
+HTTPServer httpServer(80, "/", &stairs);
 
 uint32_t _t=0;
 #define SP_US(_str,_a) Serial.print(_str); Serial.print(" took: "); Serial.print(_a); Serial.println("us")
diff --git a/templ_platformio_ini b/templ_platformio_ini
index 6ce861a..3d4b22b 100644
--- a/templ_platformio_ini
+++ b/templ_platformio_ini
@@ -16,7 +16,8 @@ data_dir = data_gz
 
 [env:hardware]
 platform = espressif8266
-board = nodemcuv2
+; board = nodemcuv2
+board = huzzah
 framework = arduino
 
 ; for pio check
@@ -31,7 +32,7 @@ check_skip_packages = yes
 board_build.filesystem = littlefs
 board_build.ldscript = eagle.flash.4m1m.ld
 extra_scripts = pre:create_gz_files.py
-monitor_speed = 115200
+monitor_speed = 76800
 
 [env:serial]
 extends = env:hardware
