diff --git a/interface/build/app/icon.png b/interface/build/app/icon.png
deleted file mode 100644
index 13dd442..0000000
Binary files a/interface/build/app/icon.png and /dev/null differ
diff --git a/interface/build/app/manifest.json b/interface/build/app/manifest.json
deleted file mode 100644
index f775661..0000000
--- a/interface/build/app/manifest.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "name":"ESP8266 React",
-  "icons":[
-    {
-      "src":"/app/icon.png",
-      "sizes":"48x48 72x72 96x96 128x128 256x256"
-    }
-  ],
-  "start_url":"/",
-  "display":"fullscreen",
-  "orientation":"any"
-}
diff --git a/interface/build/css/roboto.css b/interface/build/css/roboto.css
deleted file mode 100644
index ac21f0f..0000000
--- a/interface/build/css/roboto.css
+++ /dev/null
@@ -1,22 +0,0 @@
-/* Just supporting latin due to size constrains on the esp chip */
-@font-face {
-  font-family: 'Roboto';
-  font-style: normal;
-  font-weight: 300;
-  src: local('Roboto Light'), local('Roboto-Light'), url(../fonts/li.woff2) format('woff2');
-  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2212, U+2215;
-}
-@font-face {
-  font-family: 'Roboto';
-  font-style: normal;
-  font-weight: 400;
-  src: local('Roboto'), local('Roboto-Regular'), url(../fonts/re.woff2) format('woff2');
-  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2212, U+2215;
-}
-@font-face {
-  font-family: 'Roboto';
-  font-style: normal;
-  font-weight: 500;
-  src: local('Roboto Medium'), local('Roboto-Medium'), url(../fonts/me.woff2) format('woff2');
-  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2212, U+2215;
-}
\ No newline at end of file
diff --git a/interface/build/favicon.ico b/interface/build/favicon.ico
deleted file mode 100644
index 399ccae..0000000
Binary files a/interface/build/favicon.ico and /dev/null differ
diff --git a/interface/build/fonts/li.woff2 b/interface/build/fonts/li.woff2
deleted file mode 100644
index 52c5845..0000000
Binary files a/interface/build/fonts/li.woff2 and /dev/null differ
diff --git a/interface/build/fonts/me.woff2 b/interface/build/fonts/me.woff2
deleted file mode 100644
index 8dceabc..0000000
Binary files a/interface/build/fonts/me.woff2 and /dev/null differ
diff --git a/interface/build/fonts/re.woff2 b/interface/build/fonts/re.woff2
deleted file mode 100644
index 7e854e6..0000000
Binary files a/interface/build/fonts/re.woff2 and /dev/null differ
diff --git a/interface/build/js/1.b30b.js.gz b/interface/build/js/1.b30b.js.gz
deleted file mode 100644
index 3c4fd46..0000000
Binary files a/interface/build/js/1.b30b.js.gz and /dev/null differ
diff --git a/src/Heating.cpp b/src/Heating.cpp
index 06ea111..fa0f1af 100644
--- a/src/Heating.cpp
+++ b/src/Heating.cpp
@@ -5,37 +5,21 @@
 #include "Heating.h"
 #include "Pins.h"
 
+Heating::Heating() : mHeizungTicker(),
+                     mLuefterTicker(),
+                     mTurnOffTicker(),
+                     msettings(nullptr),
+                     mHeatingStatus(),
+                     lasttemp(0),
+                     lasthum(0),
+                     sensor() {}
+
+void Heating::init(unsigned mode, const SettingState *settings) {
+    msettings = settings;
 
-void Heating::init(unsigned mode, const SettingState* settings) {
     switch (mode) {
         case TIME: {
-            const unsigned percentOn = 20;
-            const unsigned refreshperiod = 900;
-
-            const auto func = [this]() {
-                mLuefterTicker.detach();
-
-                // every minute turn on the heating
-                digitalWrite(LuefterPin, HIGH);
-                digitalWrite(HeizungPin, HIGH);
-
-                Serial.println("Turning on heating");
-
-                mTurnOffTicker.once((int) ((float) refreshperiod * (float) percentOn / 100.0), []() {
-                    digitalWrite(HeizungPin, LOW);
-
-                    Serial.println("Turned off heating!");
-                });
-
-                mLuefterTicker.once((int) (((float) refreshperiod * (float) percentOn / 100.0) + 30.0), []() {
-                    digitalWrite(LuefterPin, LOW);
-
-                    Serial.println("Turned off fan!");
-                });
-            };
-
-            func();
-            mHeizungTicker.attach(refreshperiod, func);
+            this->handleTimeHeater();
             break;
         }
         case HUMIDITY:
@@ -51,31 +35,7 @@ void Heating::init(unsigned mode, const SettingState* settings) {
                     this->lasttemp = temp;
                     this->lasthum = hum;
 
-                    if (hum > (float)settings->heatUp) {
-                        // turn off active turnoff timers
-                        mLuefterTicker.detach();
-                        Serial.println("heating should run now!");
-                        // turn on heating and fan
-                        digitalWrite(LuefterPin, HIGH);
-                        digitalWrite(HeizungPin, HIGH);
-                        mHeatingStatus = true;
-                    } else if (hum < (float)settings->heatLow) {
-                        // if humidity too low turn off heating and fan after 60secs
-                        digitalWrite(HeizungPin, LOW);
-                        Serial.println("heating should NOT run now!");
-
-                        // if heating status in on set ticker to turn of fan in 60sec
-                        if (mHeatingStatus) {
-                            mLuefterTicker.once((float)settings->fanRuntime, []() {
-                                // turn off fan
-                                digitalWrite(LuefterPin, LOW);
-                                schedule_function([]() {
-                                    Serial.println("turning off fan");
-                                });
-                            });
-                        }
-                        mHeatingStatus = false;
-                    }
+                    this->handleHeatingEvents();
                 });
             });
 
@@ -83,6 +43,11 @@ void Heating::init(unsigned mode, const SettingState* settings) {
                 this->lasttemp = -1.0;
                 this->lasthum = -1.0;
 
+                // emergency turnoff of heating
+                if(mHeatingStatus){
+                    digitalWrite(HeizungPin, LOW);
+                }
+
                 schedule_function([e]() {
                     Serial.printf("Error: %d\n", e);
                 });
@@ -106,10 +71,60 @@ float *Heating::getLastHum() {
     return &lasthum;
 }
 
-Heating::Heating() : mHeizungTicker(),
-                     mLuefterTicker(),
-                     mTurnOffTicker(),
-                     mHeatingStatus(),
-                     lasttemp(0),
-                     lasthum(0),
-                     sensor() {}
+void Heating::handleHeatingEvents() {
+    if (this->lasthum > (float) msettings->heatUp) {
+        // turn off active turnoff timers
+        mLuefterTicker.detach();
+        Serial.println("heating should run now!");
+        // turn on heating and fan
+        digitalWrite(LuefterPin, HIGH);
+        digitalWrite(HeizungPin, HIGH);
+        mHeatingStatus = true;
+    } else if (this->lasthum < (float) msettings->heatLow) {
+        // if humidity too low turn off heating and fan after 60secs
+        digitalWrite(HeizungPin, LOW);
+        Serial.println("heating should NOT run now!");
+
+        // if heating status in on set ticker to turn of fan in 60sec
+        if (mHeatingStatus) {
+            mLuefterTicker.once((float) msettings->fanRuntime, []() {
+                // turn off fan
+                digitalWrite(LuefterPin, LOW);
+                schedule_function([]() {
+                    Serial.println("turning off fan");
+                });
+            });
+        }
+        mHeatingStatus = false;
+    }
+}
+
+void Heating::handleTimeHeater() {
+    const unsigned percentOn = 20;
+    const unsigned refreshperiod = 900;
+
+    const auto func = [this]() {
+        mLuefterTicker.detach();
+
+        // every minute turn on the heating
+        digitalWrite(LuefterPin, HIGH);
+        digitalWrite(HeizungPin, HIGH);
+
+        Serial.println("Turning on heating");
+
+        mTurnOffTicker.once((int) ((float) refreshperiod * (float) percentOn / 100.0), []() {
+            digitalWrite(HeizungPin, LOW);
+
+            Serial.println("Turned off heating!");
+        });
+
+        mLuefterTicker.once((int) (((float) refreshperiod * (float) percentOn / 100.0) + 30.0), []() {
+            digitalWrite(LuefterPin, LOW);
+
+            Serial.println("Turned off fan!");
+        });
+    };
+
+    func();
+    mHeizungTicker.attach(refreshperiod, func);
+}
diff --git a/src/Heating.h b/src/Heating.h
index 428b440..d238b3a 100644
--- a/src/Heating.h
+++ b/src/Heating.h
@@ -13,9 +13,23 @@ class Heating {
 public:
     Heating();
 
+    /**
+     * initialize the heater
+     * @param mode select the operating mode
+     * @param settings a settings object is needed for HUMIDITY mode to get percent values set by user
+     */
     void init(unsigned mode, const SettingState* settings);
 
+    /**
+     * get the last captured humidity value
+     * @return humidity value
+     */
     float* getLastHum();
+
+    /**
+     * get the last captured temperature value
+     * @return temperature value
+     */
     float* getLastTemp();
 
     enum MODES {TIME, HUMIDITY};
@@ -24,10 +38,25 @@ private:
     Ticker mLuefterTicker;
     Ticker mTurnOffTicker;
 
+    const SettingState* msettings;
+
     bool mHeatingStatus;
 
     float lasttemp;
     float lasthum;
 
     DHT22 sensor;
+
+    /**
+     * handle events after successfully received a humidity value
+     * - turn on/off of heating
+     * - afterrun of fan
+     */
+    void handleHeatingEvents();
+
+    /**
+     * handle events for time-heating mode
+     * when to turn on/off heating + fan
+     */
+    void handleTimeHeater();
 };
diff --git a/src/Pins.h b/src/Pins.h
index 9a1355b..a158462 100644
--- a/src/Pins.h
+++ b/src/Pins.h
@@ -16,6 +16,6 @@
 #define TempSensorPin  D4
 
 // version info
-#define VERSION "v1.2.0"
+#define VERSION "v1.2.1"
 
 #endif //PUMPENSTEUERUNG_PINS_H