diff --git a/factory_settings.ini b/factory_settings.ini
index b9fbd60..065d72d 100644
--- a/factory_settings.ini
+++ b/factory_settings.ini
@@ -13,8 +13,8 @@ build_flags =
 
   ; Access point settings
   -D FACTORY_AP_PROVISION_MODE=AP_MODE_DISCONNECTED
-  -D FACTORY_AP_SSID=\"ESP8266-React-#{unique_id}\" ; 1-64 characters, supports placeholders
-  -D FACTORY_AP_PASSWORD=\"esp-react\" ; 8-64 characters
+  -D FACTORY_AP_SSID=\"WordClock-#{unique_id}\" ; 1-64 characters, supports placeholders
+  -D FACTORY_AP_PASSWORD=\"wordclock\" ; 8-64 characters
   -D FACTORY_AP_CHANNEL=1
   -D FACTORY_AP_SSID_HIDDEN=false
   -D FACTORY_AP_MAX_CLIENTS=4
@@ -30,7 +30,7 @@ build_flags =
 
   ; NTP settings
   -D FACTORY_NTP_ENABLED=true
-  -D FACTORY_NTP_TIME_ZONE_LABEL=\"Europe/London\"
+  -D FACTORY_NTP_TIME_ZONE_LABEL=\"Europe/Vienna\"
   -D FACTORY_NTP_TIME_ZONE_FORMAT=\"GMT0BST,M3.5.0/1,M10.5.0\"
   -D FACTORY_NTP_SERVER=\"time.google.com\"
 
diff --git a/interface/src/project/DemoProject.tsx b/interface/src/project/DemoProject.tsx
index 74f25e5..03bd105 100644
--- a/interface/src/project/DemoProject.tsx
+++ b/interface/src/project/DemoProject.tsx
@@ -8,9 +8,7 @@ import { MenuAppBar } from '../components';
 import { AuthenticatedRoute } from '../authentication';
 
 import DemoInformation from './DemoInformation';
-import LightStateRestController from './LightStateRestController';
 import LightStateWebSocketController from './LightStateWebSocketController';
-import LightMqttSettingsController from './LightMqttSettingsController';
 
 class DemoProject extends Component<RouteComponentProps> {
 
@@ -20,18 +18,14 @@ class DemoProject extends Component<RouteComponentProps> {
 
   render() {
     return (
-      <MenuAppBar sectionTitle="Demo Project">
+      <MenuAppBar sectionTitle="WordClock">
         <Tabs value={this.props.match.url} onChange={this.handleTabChange} variant="fullWidth">
           <Tab value={`/${PROJECT_PATH}/demo/information`} label="Information" />
-          <Tab value={`/${PROJECT_PATH}/demo/rest`} label="REST Controller" />
-          <Tab value={`/${PROJECT_PATH}/demo/socket`} label="WebSocket Controller" />
-          <Tab value={`/${PROJECT_PATH}/demo/mqtt`} label="MQTT Controller" />
+          <Tab value={`/${PROJECT_PATH}/demo/socket`} label="Settings" />
         </Tabs>
         <Switch>
           <AuthenticatedRoute exact path={`/${PROJECT_PATH}/demo/information`} component={DemoInformation} />
-          <AuthenticatedRoute exact path={`/${PROJECT_PATH}/demo/rest`} component={LightStateRestController} />
           <AuthenticatedRoute exact path={`/${PROJECT_PATH}/demo/socket`} component={LightStateWebSocketController} />
-          <AuthenticatedRoute exact path={`/${PROJECT_PATH}/demo/mqtt`} component={LightMqttSettingsController} />
           <Redirect to={`/${PROJECT_PATH}/demo/information`} />
         </Switch>
       </MenuAppBar>
diff --git a/interface/src/project/LightMqttSettingsController.tsx b/interface/src/project/LightMqttSettingsController.tsx
deleted file mode 100644
index 7e4db5c..0000000
--- a/interface/src/project/LightMqttSettingsController.tsx
+++ /dev/null
@@ -1,90 +0,0 @@
-import React, { Component } from 'react';
-import { ValidatorForm, TextValidator } from 'react-material-ui-form-validator';
-
-import { Typography, Box } from '@material-ui/core';
-import SaveIcon from '@material-ui/icons/Save';
-
-import { ENDPOINT_ROOT } from '../api';
-import { restController, RestControllerProps, RestFormLoader, RestFormProps, FormActions, FormButton, SectionContent } from '../components';
-
-import { LightMqttSettings } from './types';
-
-export const LIGHT_BROKER_SETTINGS_ENDPOINT = ENDPOINT_ROOT + "brokerSettings";
-
-type LightMqttSettingsControllerProps = RestControllerProps<LightMqttSettings>;
-
-class LightMqttSettingsController extends Component<LightMqttSettingsControllerProps> {
-
-  componentDidMount() {
-    this.props.loadData();
-  }
-
-  render() {
-    return (
-      <SectionContent title='MQTT Controller' titleGutter>
-        <RestFormLoader
-          {...this.props}
-          render={props => (
-            <LightMqttSettingsControllerForm {...props} />
-          )}
-        />
-      </SectionContent>
-    )
-  }
-
-}
-
-export default restController(LIGHT_BROKER_SETTINGS_ENDPOINT, LightMqttSettingsController);
-
-type LightMqttSettingsControllerFormProps = RestFormProps<LightMqttSettings>;
-
-function LightMqttSettingsControllerForm(props: LightMqttSettingsControllerFormProps) {
-  const { data, saveData, handleValueChange } = props;
-  return (
-    <ValidatorForm onSubmit={saveData}>
-      <Box bgcolor="primary.main" color="primary.contrastText" p={2} mt={2} mb={2}>
-        <Typography variant="body1">
-          The LED is controllable via MQTT with the demo project designed to work with Home Assistant's auto discovery feature.
-        </Typography>
-      </Box>
-      <TextValidator
-        validators={['required']}
-        errorMessages={['Unique ID is required']}
-        name="unique_id"
-        label="Unique ID"
-        fullWidth
-        variant="outlined"
-        value={data.unique_id}
-        onChange={handleValueChange('unique_id')}
-        margin="normal"
-      />
-      <TextValidator
-        validators={['required']}
-        errorMessages={['Name is required']}
-        name="name"
-        label="Name"
-        fullWidth
-        variant="outlined"
-        value={data.name}
-        onChange={handleValueChange('name')}
-        margin="normal"
-      />
-      <TextValidator
-        validators={['required']}
-        errorMessages={['MQTT Path is required']}
-        name="mqtt_path"
-        label="MQTT Path"
-        fullWidth
-        variant="outlined"
-        value={data.mqtt_path}
-        onChange={handleValueChange('mqtt_path')}
-        margin="normal"
-      />
-      <FormActions>
-        <FormButton startIcon={<SaveIcon />} variant="contained" color="primary" type="submit">
-          Save
-        </FormButton>
-      </FormActions>
-    </ValidatorForm>
-  );
-}
diff --git a/interface/src/project/LightStateRestController.tsx b/interface/src/project/LightStateRestController.tsx
deleted file mode 100644
index 764ce35..0000000
--- a/interface/src/project/LightStateRestController.tsx
+++ /dev/null
@@ -1,67 +0,0 @@
-import React, { Component } from 'react';
-import { ValidatorForm } from 'react-material-ui-form-validator';
-
-import { Typography, Box, Checkbox } from '@material-ui/core';
-import SaveIcon from '@material-ui/icons/Save';
-
-import { ENDPOINT_ROOT } from '../api';
-import { restController, RestControllerProps, RestFormLoader, RestFormProps, FormActions, FormButton, SectionContent, BlockFormControlLabel } from '../components';
-
-import { LightState } from './types';
-
-export const LIGHT_SETTINGS_ENDPOINT = ENDPOINT_ROOT + "lightState";
-
-type LightStateRestControllerProps = RestControllerProps<LightState>;
-
-class LightStateRestController extends Component<LightStateRestControllerProps> {
-
-  componentDidMount() {
-    this.props.loadData();
-  }
-
-  render() {
-    return (
-      <SectionContent title='REST Controller' titleGutter>
-        <RestFormLoader
-          {...this.props}
-          render={props => (
-            <LightStateRestControllerForm {...props} />
-          )}
-        />
-      </SectionContent>
-    )
-  }
-
-}
-
-export default restController(LIGHT_SETTINGS_ENDPOINT, LightStateRestController);
-
-type LightStateRestControllerFormProps = RestFormProps<LightState>;
-
-function LightStateRestControllerForm(props: LightStateRestControllerFormProps) {
-  const { data, saveData, handleValueChange } = props;
-  return (
-    <ValidatorForm onSubmit={saveData}>
-      <Box bgcolor="primary.main" color="primary.contrastText" p={2} mt={2} mb={2}>
-        <Typography variant="body1">
-          The form below controls the LED via the RESTful service exposed by the ESP device.
-        </Typography>
-      </Box>
-      <BlockFormControlLabel
-        control={
-          <Checkbox
-            checked={data.led_on}
-            onChange={handleValueChange('led_on')}
-            color="primary"
-          />
-        }
-        label="LED State?"
-      />
-      <FormActions>
-        <FormButton startIcon={<SaveIcon />} variant="contained" color="primary" type="submit">
-          Save
-        </FormButton>
-      </FormActions>
-    </ValidatorForm>
-  );
-}
diff --git a/interface/src/project/ProjectMenu.tsx b/interface/src/project/ProjectMenu.tsx
index b7d2739..882a51d 100644
--- a/interface/src/project/ProjectMenu.tsx
+++ b/interface/src/project/ProjectMenu.tsx
@@ -16,7 +16,7 @@ class ProjectMenu extends Component<RouteComponentProps> {
           <ListItemIcon>
             <SettingsRemoteIcon />
           </ListItemIcon>
-          <ListItemText primary="Demo Project" />
+          <ListItemText primary="WordClock" />
         </ListItem>
       </List>
     )
diff --git a/interface/src/project/types.ts b/interface/src/project/types.ts
index 3221255..df45ca0 100644
--- a/interface/src/project/types.ts
+++ b/interface/src/project/types.ts
@@ -1,9 +1,3 @@
 export interface LightState {
   led_on: boolean;
-}
-
-export interface LightMqttSettings { 
-  unique_id : string;
-  name: string;
-  mqtt_path : string;
-}
+}
\ No newline at end of file
diff --git a/src/Clock.cpp b/src/Clock.cpp
index 0f498f8..5c4a53f 100644
--- a/src/Clock.cpp
+++ b/src/Clock.cpp
@@ -13,7 +13,19 @@ void Clock::init() {
   strip.clear();
   strip.show();
 
-  refreshTicker.attach(10, [this]() { this->refreshTime(); });
+  turnOn();
+}
+
+void Clock::turnOff() {
+  strip.clear();
+  strip.show();
+
+  refreshTicker.detach();
+}
+
+void Clock::turnOn() {
+  if (!refreshTicker.active())
+    refreshTicker.attach(10, [this]() { this->refreshTime(); });
   this->refreshTime();
 }
 
@@ -22,7 +34,7 @@ void Clock::paintAllwaysOnLeds() {
   printWord(types::ist, Adafruit_NeoPixel::Color(150, 0, 150));
 }
 
-void Clock::printWord(std::vector<int> word, uint32_t color) {
+void Clock::printWord(const std::vector<uint8_t>& word, uint32_t color) {
   for (const int i : word) {
     strip.setPixelColor(i, color);
   }
@@ -46,12 +58,7 @@ void Clock::refreshTime() {
   paintAllwaysOnLeds();
   setTime(hour, minute);
   strip.show();
-
-  Serial.print("time now: ");
-  Serial.print(hour);
-  Serial.print("h ");
-  Serial.print(minute);
-  Serial.println("M");
+  Serial.printf("Time now: %sh %sM", &hour, &minute);
 }
 
 void Clock::setTime(uint8_t hour, uint8_t minute) {
@@ -65,11 +72,10 @@ void Clock::setTime(uint8_t hour, uint8_t minute) {
   if (hour >= 12)
     hour = hour - 12;
 
-  std::vector<int> hourWord;
-
-  hourWord = hour == 1                 ? types::ein
+  std::vector<uint8_t> hourWord;
+  hourWord = hour == 1                 ? (minuteselector == 0 ? types::ein : types::eins)  // eins only on a full hour
              : hour == 2               ? types::zwei
-             : hour == 3               ? types::drei
+             : hour == 3               ? types::drei2
              : hour == 4               ? types::vier
              : hour == 5               ? types::fuenf2
              : hour == 6               ? types::sechs
@@ -84,7 +90,7 @@ void Clock::setTime(uint8_t hour, uint8_t minute) {
   printWord(hourWord, Adafruit_NeoPixel::Color(0, 150, 0));
 
   // fuenf / zehn / viertl word
-  std::vector<int> minuteWord;
+  std::vector<uint8_t> minuteWord;
   if (minuteselector == 1 || minuteselector == 5 || minuteselector == 7 || minuteselector == 11)
     minuteWord = types::fuenf;
   else if (minuteselector == 2 || minuteselector == 4 || minuteselector == 8 || minuteselector == 10)
@@ -99,7 +105,7 @@ void Clock::setTime(uint8_t hour, uint8_t minute) {
   printWord(minuteWord, Adafruit_NeoPixel::Color(0, 150, 0));
 
   // vor / nach
-  std::vector<int> vornachWord;
+  std::vector<uint8_t> vornachWord;
   if (minuteselector == 1 || minuteselector == 2 || minuteselector == 3 || minuteselector == 7 || minuteselector == 8)
     vornachWord = types::nach;
   else if (minuteselector == 4 || minuteselector == 5 || minuteselector == 10 || minuteselector == 11)
diff --git a/src/Clock.h b/src/Clock.h
index cfe5ed5..b42a45a 100644
--- a/src/Clock.h
+++ b/src/Clock.h
@@ -18,13 +18,16 @@ class Clock {
   LoadAnimator animator;
 
   void paintAllwaysOnLeds();
-  void printWord(std::vector<int> word,  uint32_t color);
+  void printWord(const std::vector<uint8_t>& word,  uint32_t color);
   void setTime(uint8_t hour, uint8_t minute);
 
+  void refreshTime();
+
  public:
   Clock();
   void init();
-  void refreshTime();
+  void turnOff();
+  void turnOn();
 
   Ticker refreshTicker;
 };
diff --git a/src/ClockService.cpp b/src/ClockService.cpp
index c8896f8..b9c348d 100644
--- a/src/ClockService.cpp
+++ b/src/ClockService.cpp
@@ -5,34 +5,36 @@
 #include "ClockService.h"
 
 ClockService::ClockService(AsyncWebServer* server, SecurityManager* securityManager) :
-    _httpEndpoint(LightState::read,
-                  LightState::update,
+    _httpEndpoint(WordClockState::read,
+                  WordClockState::update,
                   this,
                   server,
                   LIGHT_SETTINGS_ENDPOINT_PATH,
                   securityManager,
                   AuthenticationPredicates::IS_AUTHENTICATED),
-    _webSocket(LightState::read,
-               LightState::update,
+    _webSocket(WordClockState::read,
+               WordClockState::update,
                this,
                server,
                LIGHT_SETTINGS_SOCKET_PATH,
                securityManager,
                AuthenticationPredicates::IS_AUTHENTICATED),
     clock() {
-  // configure led to be output
-  pinMode(LED_PIN, OUTPUT);
-
   // configure settings service update handler to update LED state
   addUpdateHandler([&](const String& originId) { onConfigUpdated(); }, false);
 }
 
 void ClockService::begin() {
-  _state.ledOn = DEFAULT_LED_STATE;
+  _state.wordClockOn = DEFAULT_CLOCK_STATE;
   onConfigUpdated();
   clock.init();
 }
 
 void ClockService::onConfigUpdated() {
-  digitalWrite(LED_PIN, _state.ledOn ? LED_ON : LED_OFF);
+  //  digitalWrite(LED_PIN, _state.ledOn ? LED_ON : LED_OFF);
+  if (_state.wordClockOn) {
+    clock.turnOn();
+  } else {
+    clock.turnOff();
+  }
 }
diff --git a/src/ClockService.h b/src/ClockService.h
index 28797ae..a0d2ac8 100644
--- a/src/ClockService.h
+++ b/src/ClockService.h
@@ -9,48 +9,39 @@
 #include <WebSocketTxRx.h>
 #include "Clock.h"
 
-#define LED_PIN 2
-#define PRINT_DELAY 5000
-
-#define DEFAULT_LED_STATE false
+#define DEFAULT_CLOCK_STATE true
 #define OFF_STATE "OFF"
 #define ON_STATE "ON"
 
-// Note that the built-in LED is on when the pin is low on most NodeMCU boards.
-// This is because the anode is tied to VCC and the cathode to the GPIO 4 (Arduino pin 2).
-#ifdef ESP32
-#define LED_ON 0x1
-#define LED_OFF 0x0
-#elif defined(ESP8266)
-#define LED_ON 0x0
-#define LED_OFF 0x1
-#endif
+#define CLOCK_ON 0x1
+#define CLOCK_OFF 0x0
+
 
 #define LIGHT_SETTINGS_ENDPOINT_PATH "/rest/lightState"
 #define LIGHT_SETTINGS_SOCKET_PATH "/ws/lightState"
 
-class LightState {
+class WordClockState {
  public:
-  bool ledOn;
+  bool wordClockOn;
 
-  static void read(LightState& settings, JsonObject& root) {
-    root["led_on"] = settings.ledOn;
+  static void read(WordClockState& settings, JsonObject& root) {
+    root["led_on"] = settings.wordClockOn;
   }
 
-  static StateUpdateResult update(JsonObject& root, LightState& lightState) {
-    boolean newState = root["led_on"] | DEFAULT_LED_STATE;
-    if (lightState.ledOn != newState) {
-      lightState.ledOn = newState;
+  static StateUpdateResult update(JsonObject& root, WordClockState& lightState) {
+    boolean newState = root["led_on"] | DEFAULT_CLOCK_STATE;
+    if (lightState.wordClockOn != newState) {
+      lightState.wordClockOn = newState;
       return StateUpdateResult::CHANGED;
     }
     return StateUpdateResult::UNCHANGED;
   }
 
-  static void haRead(LightState& settings, JsonObject& root) {
-    root["state"] = settings.ledOn ? ON_STATE : OFF_STATE;
+  static void haRead(WordClockState& settings, JsonObject& root) {
+    root["state"] = settings.wordClockOn ? ON_STATE : OFF_STATE;
   }
 
-  static StateUpdateResult haUpdate(JsonObject& root, LightState& lightState) {
+  static StateUpdateResult haUpdate(JsonObject& root, WordClockState& lightState) {
     String state = root["state"];
     // parse new led state
     boolean newState = false;
@@ -60,22 +51,22 @@ class LightState {
       return StateUpdateResult::ERROR;
     }
     // change the new state, if required
-    if (lightState.ledOn != newState) {
-      lightState.ledOn = newState;
+    if (lightState.wordClockOn != newState) {
+      lightState.wordClockOn = newState;
       return StateUpdateResult::CHANGED;
     }
     return StateUpdateResult::UNCHANGED;
   }
 };
 
-class ClockService : public StatefulService<LightState> {
+class ClockService : public StatefulService<WordClockState> {
  public:
   ClockService(AsyncWebServer* server, SecurityManager* securityManager);
   void begin();
 
  private:
-  HttpEndpoint<LightState> _httpEndpoint;
-  WebSocketTxRx<LightState> _webSocket;
+  HttpEndpoint<WordClockState> _httpEndpoint;
+  WebSocketTxRx<WordClockState> _webSocket;
 
   Clock clock;
 
diff --git a/src/Types.cpp b/src/Types.cpp
index b2f3613..cc7a35a 100644
--- a/src/Types.cpp
+++ b/src/Types.cpp
@@ -4,32 +4,32 @@
 
 #include "Types.h"
 
-const std::vector<int> types::es = calcPixels(0, 0, 2);
-const std::vector<int> types::ist = calcPixels(3, 0, 3);
-const std::vector<int> types::fuenf = calcPixels(8, 0, 4);
-const std::vector<int> types::zehn = calcPixels(0, 1, 4);
-const std::vector<int> types::zwanzig = calcPixels(5, 1, 7);
-const std::vector<int> types::drei = calcPixels(1, 2, 3);
-const std::vector<int> types::viertel = calcPixels(5, 2, 7);
-const std::vector<int> types::dreiviertel = calcPixels(1, 2, 11);
-const std::vector<int> types::vor = calcPixels(0, 3, 3);
-const std::vector<int> types::nach = calcPixels(3, 3, 4);
-const std::vector<int> types::halb = calcPixels(8, 3, 4);
-const std::vector<int> types::zwoelf = calcPixels(0, 4, 5);
-const std::vector<int> types::sieben = calcPixels(6, 4, 6);
-const std::vector<int> types::ein = calcPixels(0, 5, 3);
-const std::vector<int> types::eins = calcPixels(0, 5, 4);
-const std::vector<int> types::vier = calcPixels(4, 5, 4);
-const std::vector<int> types::acht = calcPixels(8, 5, 4);
-const std::vector<int> types::sechs = calcPixels(0, 6, 5);
-const std::vector<int> types::zwei = calcPixels(6, 6, 5);
-const std::vector<int> types::fuenf2 = calcPixels(1, 7, 5);
-const std::vector<int> types::elf = calcPixels(5, 7, 3);
-const std::vector<int> types::zehn2 = calcPixels(8, 7, 4);
-const std::vector<int> types::neun = calcPixels(0, 8, 4);
-const std::vector<int> types::drei2 = calcPixels(4, 8, 4);
-const std::vector<int> types::ein2 = calcPixels(6, 8, 3);
-const std::vector<int> types::uhr = calcPixels(9, 8, 3);
+const std::vector<uint8_t> types::es = calcPixels(0, 0, 2);
+const std::vector<uint8_t> types::ist = calcPixels(3, 0, 3);
+const std::vector<uint8_t> types::fuenf = calcPixels(8, 0, 4);
+const std::vector<uint8_t> types::zehn = calcPixels(0, 1, 4);
+const std::vector<uint8_t> types::zwanzig = calcPixels(5, 1, 7);
+const std::vector<uint8_t> types::drei = calcPixels(1, 2, 4);
+const std::vector<uint8_t> types::viertel = calcPixels(5, 2, 7);
+const std::vector<uint8_t> types::dreiviertel = calcPixels(1, 2, 11);
+const std::vector<uint8_t> types::vor = calcPixels(0, 3, 3);
+const std::vector<uint8_t> types::nach = calcPixels(3, 3, 4);
+const std::vector<uint8_t> types::halb = calcPixels(8, 3, 4);
+const std::vector<uint8_t> types::zwoelf = calcPixels(0, 4, 5);
+const std::vector<uint8_t> types::sieben = calcPixels(6, 4, 6);
+const std::vector<uint8_t> types::ein = calcPixels(0, 5, 3);
+const std::vector<uint8_t> types::eins = calcPixels(0, 5, 4);
+const std::vector<uint8_t> types::vier = calcPixels(4, 5, 4);
+const std::vector<uint8_t> types::acht = calcPixels(8, 5, 4);
+const std::vector<uint8_t> types::sechs = calcPixels(0, 6, 5);
+const std::vector<uint8_t> types::zwei = calcPixels(6, 6, 4);
+const std::vector<uint8_t> types::fuenf2 = calcPixels(1, 7, 4);
+const std::vector<uint8_t> types::elf = calcPixels(5, 7, 3);
+const std::vector<uint8_t> types::zehn2 = calcPixels(8, 7, 4);
+const std::vector<uint8_t> types::neun = calcPixels(0, 8, 4);
+const std::vector<uint8_t> types::drei2 = calcPixels(4, 8, 4);
+const std::vector<uint8_t> types::ein2 = calcPixels(6, 8, 3);
+const std::vector<uint8_t> types::uhr = calcPixels(9, 8, 3);
 
 uint8_t types::convert(uint8_t x, uint8_t y) {
   const bool upRow = (x % 2) == 0;
@@ -42,8 +42,8 @@ uint8_t types::convert(uint8_t x, uint8_t y) {
   return val;
 }
 
-std::vector<int> types::calcPixels(uint8_t x, uint8_t y, uint8_t nrPixels) {
-  std::vector<int> vec;
+std::vector<uint8_t> types::calcPixels(uint8_t x, uint8_t y, uint8_t nrPixels) {
+  std::vector<uint8_t> vec;
   for (uint8_t i = 0; i < nrPixels; i++) {
     vec.push_back(convert(x + i, y));
   }
diff --git a/src/Types.h b/src/Types.h
index 2587d2e..b6b64fa 100644
--- a/src/Types.h
+++ b/src/Types.h
@@ -8,7 +8,7 @@
 #include "Arduino.h"
 
 struct types {
-  static const std::vector<int>
+  static const std::vector<uint8_t>
       es, ist, fuenf,
       zehn, zwanzig, drei,
       viertel, dreiviertel, vor,
@@ -19,9 +19,22 @@ struct types {
       zehn2, neun, drei2,
       ein2, uhr;
 
+  /**
+   * convert an x/y coordinate into the corresponding strip index value
+   * @param x x axis value
+   * @param y y axis value
+   * @return strip led index (zero beginning)
+   */
   static uint8_t convert(uint8_t x, uint8_t y);
 
-  static std::vector<int> calcPixels(uint8_t x, uint8_t y, uint8_t nrPixels);
+  /**
+   * calculate all pixels within a pixelrange for a word
+   * @param x x axis value
+   * @param y y axis value
+   * @param nrPixels number of pixels the word contains
+   * @return array of strip indexes
+   */
+  static std::vector<uint8_t> calcPixels(uint8_t x, uint8_t y, uint8_t nrPixels);
 };
 
 #endif  // LEDSTRIPINTERFACE_TYPES_H