diff --git a/firmware/config_html.h b/firmware/config_html.h
deleted file mode 100644
index f56997b..0000000
--- a/firmware/config_html.h
+++ /dev/null
@@ -1,66 +0,0 @@
-
-String getConfigHTML()
-{
-  String config_html = "<form class=\"pure-form pure-form-aligned\" action=\"/\" method=\"post\">"
-"<h3>Config</h3>"
-"<div class=\"pure-control-group\">"
-"<label for=\"startup\">"
-"<strong>Startup</strong>"
-"</label>"
-"<select onchange=\"this.form.submit()\" id=\"startup\" name=\"startup\">"
-"<option {{STARTUP_SELECTED_LS_0}} value=\"0\">Last state</option>"
-"<option {{STARTUP_SELECTED_ON_1}} value=\"1\">On</option>"
-"<option {{STARTUP_SELECTED_OFF_2}} value=\"2\">Off</option>"
-"</select>"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"scene\">"
-"<strong>Scene</strong>"
-"</label>"
-"<select onchange=\"this.form.submit()\" id=\"scene\" name=\"scene\">"
-"<option {{SCENE_SELECTED_RELAX_0}} value=\"0\">Relax</option>"
-"<option {{SCENE_SELECTED_BRIGHT_1}} value=\"1\">Bright</option>"
-"<option {{SCENE_SELECTED_NIGHT_2}} value=\"2\">Night</option>"
-"</select>"
-"</div>"
-"<br>"
-"<h3>Wifi</h3>"
-"<div class=\"pure-control-group\">"
-"<label for=\"ip\">SSID</label>"
-"<input id=\"ssid\" name=\"ssid\" type=\"text\" value=\"{{WIFI_SSID}}\">"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"wpw\">Passphrase</label>"
-"<input id=\"wpw\" name=\"wpw\" type=\"text\" placeholder=\"1234password\">"
-"</div>"
-"<br>"
-"<h3>Network</h3>"
-"<div class=\"pure-control-group\">"
-"<label for=\"dip\">"
-"<strong>Dynamic-IP</strong>"
-"</label>"
-"<a class=\"pure-button {{DIP_LINK_ON_PRIMARY}}\" href=\"/?dip=true\">ON</a>"
-"<a class=\"pure-button {{DIP_LINK_OFF_PRIMARY}}\" href=\"/?dip=false\">OFF</a>"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"ip\">IP</label>"
-"<input id=\"ip\" name=\"ip\" type=\"text\" value=\"{{WIFI_CFG_IP}}\">"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"gwip\">Gateway IP</label>"
-"<input id=\"gwip\" name=\"gwip\" type=\"text\" value=\"{{WIFI_CFG_GW}}\">"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"ip\">Netmask</label>"
-"<input id=\"netmask\" name=\"netmas\" type=\"text\" value=\"{{WIFI_CFG_NM}}\">"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"ip\">DNS</label>"
-"<input id=\"netmask\" name=\"dns\" type=\"text\" value=\"{{WIFI_CFG_DNS}}\">"
-"</div>"
-"<div class=\"pure-controls\">"
-"<button type=\"submit\" class=\"pure-button pure-button-primary\">Save</button>"
-"</div>"
-"</form>";
-  return config_html;
-}
diff --git a/firmware/data/config_template.html b/firmware/data/config_template.html
new file mode 100644
index 0000000..bf94325
--- /dev/null
+++ b/firmware/data/config_template.html
@@ -0,0 +1,62 @@
+<form class="pure-form pure-form-aligned" action="/" method="post">
+<h3>Config</h3>
+<div class="pure-control-group">
+<label for="startup">
+<strong>Startup</strong>
+</label>
+<select onchange="this.form.submit()" id="startup" name="startup">
+<option {{STARTUP_SELECTED_LS_0}} value="0">Last state</option>
+<option {{STARTUP_SELECTED_ON_1}} value="1">On</option>
+<option {{STARTUP_SELECTED_OFF_2}} value="2">Off</option>
+</select>
+</div>
+<div class="pure-control-group">
+<label for="scene">
+<strong>Scene</strong>
+</label>
+<select onchange="this.form.submit()" id="scene" name="scene">
+<option {{SCENE_SELECTED_RELAX_0}} value="0">Relax</option>
+<option {{SCENE_SELECTED_BRIGHT_1}} value="1">Bright</option>
+<option {{SCENE_SELECTED_NIGHT_2}} value="2">Night</option>
+</select>
+</div>
+<br>
+<h3>Wifi</h3>
+<div class="pure-control-group">
+<label for="ip">SSID</label>
+<input id="ssid" name="ssid" type="text" value="{{WIFI_SSID}}">
+</div>
+<div class="pure-control-group">
+<label for="wpw">Passphrase</label>
+<input id="wpw" name="wpw" type="text" placeholder="1234password">
+</div>
+<br>
+<h3>Network</h3>
+<div class="pure-control-group">
+<label for="dip">
+<strong>Dynamic-IP</strong>
+</label>
+<a class="pure-button {{DIP_LINK_ON_PRIMARY}}" href="/?dip=true">ON</a>
+<a class="pure-button {{DIP_LINK_OFF_PRIMARY}}" href="/?dip=false">OFF</a>
+</div>
+<div class="pure-control-group">
+<label for="ip">IP</label>
+<input id="ip" name="ip" type="text" value="{{WIFI_CFG_IP}}">
+</div>
+<div class="pure-control-group">
+<label for="gwip">Gateway IP</label>
+<input id="gwip" name="gwip" type="text" value="{{WIFI_CFG_GW}}">
+</div>
+<div class="pure-control-group">
+<label for="ip">Netmask</label>
+<input id="netmask" name="netmas" type="text" value="{{WIFI_CFG_NM}}">
+</div>
+<div class="pure-control-group">
+<label for="ip">DNS</label>
+<input id="netmask" name="dns" type="text" value="{{WIFI_CFG_DNS}}">
+</div>
+<div class="pure-controls">
+<button type="submit" class="pure-button pure-button-primary">Save</button>
+</div>
+</form>
+
diff --git a/firmware/data/index_template_bottom.html b/firmware/data/index_template_bottom.html
new file mode 100644
index 0000000..af0a134
--- /dev/null
+++ b/firmware/data/index_template_bottom.html
@@ -0,0 +1,175 @@
+<!-- bottom -->
+<script>
+function loadGraphData() {
+console.log('----> generate graph <----');
+$.getJSON('/tc_data_blocks', function(data) {
+var currenttime = [];
+var time = [];
+var channel1 = [];
+var channel2 = [];
+var channel3 = [];
+var channel4 = [];
+for (var i = 0; i < data['tcdata'].length; i++) {
+time.push(data['tcdata'][i]['hour'] + ':' + (data['tcdata'][i]['min'] < 10 ? '0' : '') + data['tcdata'][i]['min']);
+channel1.push(data['tcdata'][i]['ch1']);
+channel2.push(data['tcdata'][i]['ch2']);
+channel3.push(data['tcdata'][i]['ch3']);
+channel4.push(data['tcdata'][i]['ch4']);
+}
+currenttime.push(data['currenttime']['hour']);
+currenttime.push(data['currenttime']['min']);
+console.log(currenttime);
+var currentTimeStr = currenttime[0] + ':' + (currenttime[1] < 10 ? '0' : '') + currenttime[1];
+var index = time.indexOf(currentTimeStr);
+if (index === -1) {
+var lowerIndex = -1;
+var upperIndex = -1;
+for (var i = 0; i < time.length - 1; i++) {
+console.log(time[i] + ' <= ' + currentTimeStr + ' >= ' + time[i + 1]);
+const currentDate = new Date();
+const year = currentDate.getFullYear();
+const month = (currentDate.getMonth() + 1).toString().padStart(2, '0');
+const day = currentDate.getDate().toString().padStart(2, '0');
+const dateString = `${year}-${month}-${day}`;
+const start = moment(dateString + ' ' + time[i], 'YYYY-MM-DD HH:mm');
+const curr = moment(dateString + ' ' + currentTimeStr, 'YYYY-MM-DD HH:mm');
+const end = moment(dateString + ' ' + time[i + 1], 'YYYY-MM-DD HH:mm');
+console.log(start.format('YYYY-MM-DD HH:mm') + ' <= ' + curr.format('YYYY-MM-DD HH:mm') + ' >= ' + end.format('YYYY-MM-DD HH:mm'));
+console.log(curr.isBetween(start, end));
+if (curr.isBetween(start, end)) {
+lowerIndex = i;
+upperIndex = i + 1;
+break;
+}
+}
+console.log('lowerIndex=' + lowerIndex);
+console.log('upperIndex=' + upperIndex);
+if (lowerIndex === -1 || upperIndex === -1) {
+console.log("Error: Current time not found in time array and not between two elements in time array.");
+lowerIndex = 0;
+upperIndex = 1;
+var tmp1 = time[0].split(':');
+console.log('tmp1 = ' + tmp1);
+currenttime[0] = tmp1[0];
+currenttime[1] = tmp1[1];
+}
+var lowerTime = time[lowerIndex].split(":");
+var upperTime = time[upperIndex].split(":");
+var timeDiff = (currenttime[0] - lowerTime[0]) + ((currenttime[1] - lowerTime[1]) / 60);
+var indexFloat = lowerIndex + timeDiff / ((upperTime[0] - lowerTime[0]) + ((upperTime[1] - lowerTime[1]) / 60));
+console.log("Index (float): " + indexFloat);
+} else {
+console.log("Index (integer): " + index);
+console.log("Index (float): " + index);
+}
+if (indexFloat > index) {
+index = indexFloat;
+}
+console.log("index in graph >>>" + index);
+var trace1 = {
+x: time,
+y: channel1,
+name: 'Channel 1',
+type: 'scatter',
+mode: 'lines+markers',
+};
+var trace2 = {
+x: time,
+y: channel2,
+name: 'Channel 2',
+type: 'scatter',
+mode: 'lines+markers',
+};
+var trace3 = {
+x: time,
+y: channel3,
+name: 'Channel 3',
+type: 'scatter',
+mode: 'lines+markers',
+};
+var trace4 = {
+x: time,
+y: channel4,
+name: 'Channel 4',
+type: 'scatter',
+mode: 'lines+markers',
+};
+var layout = {
+title: 'Timing Control Data Blocks',
+xaxis: {
+title: 'Time',
+tickangle: -45,
+},
+yaxis: {
+title: 'Brightness',
+range: [0, 255],
+},
+shapes: [{
+type: 'line',
+x0: index,
+y0: 0,
+x1: index,
+y1: 255,
+line: {
+color: 'lightgrey',
+width: 3,
+dash: 'dot'
+}
+}]
+};
+Plotly.newPlot('plot_chart', [trace1, trace2, trace3, trace4], layout);
+});
+}
+setInterval(loadGraphData, 10000);
+loadGraphData();
+
+function updateLightState() {
+console.log('----> setting bri and power switch <----');
+for (let i = 1; i <= {{LIGHT_COUNT}}; i++) {
+const lightURL = `http://{{IP_ADDRESS}}/state?light=${i}`;
+fetch(lightURL).then(response => response.json()).then(data => {
+const briSlider = document.getElementById(`bri${i - 1}`);
+const briSliderVal = document.getElementById(`bri${i - 1}_val`);
+const onLinkOn = document.getElementById(`on${i - 1}_on`);
+const onLinkOff = document.getElementById(`on${i - 1}_off`);
+briSlider.value = data.bri;
+briSliderVal.innerHTML = (Math.round((data.bri * 100.0 / 255.0) * 100) / 100).toFixed(2);
+console.log('data.on ' + i + ' = ' + data.on);
+if (data.on == true) {
+onLinkOn.classList.add('pure-button-primary');
+onLinkOff.classList.remove('pure-button-primary');
+} else {
+onLinkOn.classList.remove('pure-button-primary');
+onLinkOff.classList.add('pure-button-primary');
+}
+}).catch(error => console.error(error));
+}
+}
+setInterval(updateLightState, 10000);
+updateLightState();
+
+function updatePWMValues() {
+console.log('----> setting pwm data <----');
+for (let i = 0; i < {{LIGHT_COUNT}}; i++) {
+const lightID = i + 1;
+const pwmElement = document.getElementById(`light${i}_pwm`);
+const pwmElementTxt = document.getElementById(`light${i}_pwm_txt`);
+if (pwmElement) {
+const url = `http://{{IP_ADDRESS}}/state?light=${lightID}`;
+fetch(url).then(response => response.json()).then(data => {
+const pwmValue = ((Math.round((data.curpwm - ((data.curpwm >= {{PWM_MIN}}) ? {{PWM_MIN}} : 0)) / {{PWM_MAX}} * 10000) / 100).toFixed(2));
+console.log('curpwm[' + i + '] = ' + data.curpwm + ' = ' + pwmValue);
+pwmElement.innerText = pwmValue.toString();
+pwmElement.value = pwmValue;
+pwmElementTxt.innerText = pwmValue.toString();
+}).catch(error => console.error(error));
+}
+}
+}
+updatePWMValues();
+setInterval(updatePWMValues, 5000);
+</script>
+</div>
+</fieldset>
+</body>
+</html>
diff --git a/firmware/data/index_template_middle.html b/firmware/data/index_template_middle.html
new file mode 100644
index 0000000..088c0a5
--- /dev/null
+++ b/firmware/data/index_template_middle.html
@@ -0,0 +1,7 @@
+<!-- middle -->
+</td>
+<td>
+<div id="plot_chart"></div>
+</td>
+</tr>
+</table>
diff --git a/firmware/data/index_template_top.html b/firmware/data/index_template_top.html
new file mode 100644
index 0000000..2e8110d
--- /dev/null
+++ b/firmware/data/index_template_top.html
@@ -0,0 +1,91 @@
+<!doctype html>
+<html>
+<head>
+<style></style>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Light setup - {{LIGHT_NAME}}</title>
+<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
+<script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>
+<link rel="stylesheet" href="https://unpkg.com/purecss@0.6.2/build/pure-min.css">
+</head>
+<body>
+<fieldset>
+<h3>{{LIGHT_NAME}}</h3>
+<div class="pure-form pure-form-aligned">
+<div class="pure-controls">
+<span class="pure-form-message">
+<a href="/?alert=1">alert</a>
+&nbsp; 
+<a href="/?reset=1">reset</a>
+&nbsp; 
+<a href="/?resettc">reset timing control data</a>
+&nbsp; 
+<a href="/update">update</a>
+</span>
+<label for="cb" class="pure-checkbox"></label>
+</div>
+<br>
+<div class="pure-control-group">
+<label for="tc_on">
+<strong>Timing control</strong>
+</label>
+<a id="tc_on" class="pure-button {{TC_LINK_PRIMARY_ON}}" href="#">ON</a>
+<a id="tc_off" class="pure-button {{TC_LINK_PRIMARY_OFF}}" href="#">OFF</a>
+</div>
+<script>
+var links = document.querySelectorAll('[id^="tc_on"]');
+links.forEach(function(link) {
+link.addEventListener('click', function(event) {
+event.preventDefault();
+var xhr = new XMLHttpRequest();
+xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=true', true);
+xhr.send();
+console.log('tc=true call');
+document.getElementById('tc_on').classList.add('pure-button-primary');
+document.getElementById('tc_off').classList.remove('pure-button-primary');
+});
+});
+var links = document.querySelectorAll('[id^="tc_off"]');
+links.forEach(function(link) {
+link.addEventListener('click', function(event) {
+event.preventDefault();
+var xhr = new XMLHttpRequest();
+xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=false', true);
+xhr.send();
+console.log('tc=false call');
+document.getElementById('tc_off').classList.add('pure-button-primary');
+document.getElementById('tc_on').classList.remove('pure-button-primary');
+});
+});
+</script>
+<br>
+<div class="pure-control-group">
+<label for="transition">Transition time (s)</label>
+<input id="transition" name="transition" type="text" placeholder="10" value="{{TRANSITION_TIME}}">
+</div>
+<br>
+<script>
+let timeoutId;
+function sendSliderValue(x) {
+x = x - 1;
+clearTimeout(timeoutId);
+timeoutId = setTimeout(() => {
+var value = document.getElementById(`bri${x}`).value;
+var url = `http://{{IP_ADDRESS}}/?bri${x}=${value}`;
+fetch(url).then(response => {
+if (!response.ok) {
+throw new Error(`HTTP error! status: ${response.status}`);
+}
+console.log(`Sent slider value ${value} to ${url}`);
+}).catch(error => {
+console.error(`Error sending slider value to ${url}: ${error}`);
+});
+}, 500);
+}
+</script>
+<br>
+<table border=0>
+<tr>
+<td>
diff --git a/firmware/data/light_control_template.html b/firmware/data/light_control_template.html
new file mode 100644
index 0000000..8bc313f
--- /dev/null
+++ b/firmware/data/light_control_template.html
@@ -0,0 +1,29 @@
+<h4>Light {{LIGHT_NUMBER}}</h4>
+<div class="pure-control-group">
+<label for="power">
+<strong>Power</strong>
+</label>
+<a id="on{{LIGHT_NUMBER_DEC}}_on" class="pure-button" href="#">ON</a>
+<a id="on{{LIGHT_NUMBER_DEC}}_off" class="pure-button" href="#">OFF</a>
+</div>
+<div class="pure-control-group">
+<label for="bri{{LIGHT_NUMBER_DEC}}">Bri</label>
+<input id="bri{{LIGHT_NUMBER_DEC}}" onchange="sendSliderValue({{LIGHT_NUMBER}})" name="bri{{LIGHT_NUMBER_DEC}}" type="range" min="0" max="255" value="25">
+&nbsp;
+<span id="bri{{LIGHT_NUMBER_DEC}}_val" name="bri{{LIGHT_NUMBER_DEC}}">9</span>
+%
+<br>
+<label for="light{{LIGHT_NUMBER_DEC}}_pwm">PWM-Value</label>
+<input type="range" min="0" max="100" value="0" id="light{{LIGHT_NUMBER_DEC}}_pwm" disabled>
+&nbsp;
+<span id="light{{LIGHT_NUMBER_DEC}}_pwm_txt"></span>
+%
+<script>
+var slider{{LIGHT_NUMBER_DEC}} = document.getElementById("bri{{LIGHT_NUMBER_DEC}}");
+var output{{LIGHT_NUMBER_DEC}} = document.getElementById("bri{{LIGHT_NUMBER_DEC}}_val");
+output{{LIGHT_NUMBER_DEC}}.innerHTML = (Math.round((slider{{LIGHT_NUMBER_DEC}}.value * 100.0 / 255.0) * 100) / 100).toFixed(2);
+slider{{LIGHT_NUMBER_DEC}}.oninput = function() {
+output{{LIGHT_NUMBER_DEC}}.innerHTML = (Math.round((this.value * 100.0 / 255.0) * 100) / 100).toFixed(2);
+}
+</script>
+</div>
diff --git a/firmware/config_html.html b/firmware/data/org/config_template.html
similarity index 98%
rename from firmware/config_html.html
rename to firmware/data/org/config_template.html
index f96ff61..802760a 100644
--- a/firmware/config_html.html
+++ b/firmware/data/org/config_template.html
@@ -1,3 +1,4 @@
+<div id="tab-config">
 <form class="pure-form pure-form-aligned" action="/" method="post">
             <h3>Config</h3>
             <div class="pure-control-group">
@@ -59,4 +60,4 @@
                 <button type="submit" class="pure-button pure-button-primary">Save</button>
             </div>
         </form>
-
+</div><!-- end of config div -->
diff --git a/firmware/index_html.html b/firmware/data/org/index_template_bottom.html
similarity index 68%
rename from firmware/index_html.html
rename to firmware/data/org/index_template_bottom.html
index 45afa17..78a6769 100644
--- a/firmware/index_html.html
+++ b/firmware/data/org/index_template_bottom.html
@@ -1,102 +1,18 @@
-<!doctype html>
-<html>
-<head>
-    <style></style>
-    <meta charset="utf-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Light setup - {{LIGHT_NAME}}</title>
-    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
-    <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>
-    <link rel="stylesheet" href="https://unpkg.com/purecss@0.6.2/build/pure-min.css">
-</head>
-<body>
-    <fieldset>
-        <h3>{{LIGHT_NAME}}</h3>
-        <div class="pure-form pure-form-aligned">
-            <div class="pure-controls">
-                <span class="pure-form-message">
-                    <a href="/?alert=1">alert</a>
-                     &nbsp; 
-                    <a href="/?reset=1">reset</a>
-                     &nbsp; 
-                    <a href="/?resettc">reset timing control data</a>
-                     &nbsp; 
-                    <a href="/update">update</a>
-                </span>
-                <label for="cb" class="pure-checkbox"></label>
-            </div>
-            <br>
-            <div class="pure-control-group">
-                <label for="tc_on">
-                    <strong>Timing control</strong>
-                </label>
-                <a id="tc_on" class="pure-button {{TC_LINK_PRIMARY_ON}}" href="#">ON</a>
-                <a id="tc_off" class="pure-button {{TC_LINK_PRIMARY_OFF}}" href="#">OFF</a>
-            </div>
-            <script>
-            var links = document.querySelectorAll('[id^="tc_on"]');
-            links.forEach(function(link) {
-                link.addEventListener('click', function(event) {
-                    event.preventDefault();
-                    var xhr = new XMLHttpRequest();
-                    xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=true', true);
-                    xhr.send();
-                    console.log('tc=true call');
-                    document.getElementById('tc_on').classList.add('pure-button-primary');
-                    document.getElementById('tc_off').classList.remove('pure-button-primary');
-                });
-            });
-            var links = document.querySelectorAll('[id^="tc_off"]');
-            links.forEach(function(link) {
-                link.addEventListener('click', function(event) {
-                    event.preventDefault();
-                    var xhr = new XMLHttpRequest();
-                    xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=false', true);
-                    xhr.send();
-                    console.log('tc=false call');
-                    document.getElementById('tc_off').classList.add('pure-button-primary');
-                    document.getElementById('tc_on').classList.remove('pure-button-primary');
-                });
-            });
-            </script>
-            <br>
-            <div class="pure-control-group">
-                <label for="transition">Transition time (s)</label>
-                <input id="transition" name="transition" type="text" placeholder="10" value="{{TRANSITION_TIME}}">
-            </div>
-            <br>
-            <script>
-            let timeoutId;
-            function sendSliderValue(x) {
-                x = x - 1;
-                clearTimeout(timeoutId);
-                timeoutId = setTimeout(() => {
-                    var value = document.getElementById(`bri${x}`).value;
-                    var url = `http://{{IP_ADDRESS}}/?bri${x}=${value}`;
-                    fetch(url).then(response => {
-                        if (!response.ok) {
-                            throw new Error(`HTTP error! status: ${response.status}`);
-                        }
-                        console.log(`Sent slider value ${value} to ${url}`);
-                    }).catch(error => {
-                        console.error(`Error sending slider value to ${url}: ${error}`);
-                    });
-                }, 500);
-            }
-            </script>
-            <br>
-            <table border=0>
-                <tr>
-                    <td>
-{{LIGHTS_CONTROL}}
-                    </td>
-                    <td>
-                        <div id="plot_chart"></div>
-                    </td>
-                </tr>
-            </table>
-            {{CONFIG_PAGE}}
+<!-- bottom -->
+  <script>
+    var tabMain = document.getElementById("tab-main");
+    var tabConfig = document.getElementById("tab-config");
+
+    document.getElementById("tab1-a").addEventListener("click", function() {
+      tabMain.classList.add("visible");
+      tabConfig.classList.remove("visible");
+    });
+
+    document.getElementById("tab2-a").addEventListener("click", function() {
+      tabMain.classList.remove("visible");
+      tabConfig.classList.add("visible");
+    });
+  </script>
             <script>
             function loadGraphData() {
                 console.log('----> generate graph <----');
diff --git a/firmware/data/org/index_template_middle.html b/firmware/data/org/index_template_middle.html
new file mode 100644
index 0000000..92c93a5
--- /dev/null
+++ b/firmware/data/org/index_template_middle.html
@@ -0,0 +1,7 @@
+<!-- middle -->
+                    </td>
+                    <td>
+                        <div id="plot_chart"></div>
+                    </td>
+                </tr>
+            </table>
diff --git a/firmware/data/org/index_template_top.html b/firmware/data/org/index_template_top.html
new file mode 100644
index 0000000..8306caf
--- /dev/null
+++ b/firmware/data/org/index_template_top.html
@@ -0,0 +1,111 @@
+<!doctype html>
+<html>
+<head>
+    <style></style>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Light setup - {{LIGHT_NAME}}</title>
+    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
+    <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>
+    <link rel="stylesheet" href="https://unpkg.com/purecss@0.6.2/build/pure-min.css">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <style>
+    #tab-main, #tab-config {
+      display: none;
+    }
+    #tab-main.visible {
+      display: block;
+    }
+    #tab-config.visible {
+      display: block;
+    }
+  </style>
+</head>
+<body>
+    <fieldset>
+        <h3>{{LIGHT_NAME}}</h3>
+        <div class="pure-form pure-form-aligned">
+            <div class="pure-controls">
+                <span class="pure-form-message">
+                    <a href="/?alert=1">alert</a>
+                     &nbsp; 
+                    <a href="/?reset=1">reset</a>
+                     &nbsp; 
+                    <a href="/?resettc">reset timing control data</a>
+                     &nbsp; 
+                    <a href="/update">update</a>
+                </span>
+                <label for="cb" class="pure-checkbox"></label>
+            </div>
+            <br>
+
+            <div>
+                <a href="#" id="tab1-a" class="pure-button">Main</a>
+                <a href="#" id="tab2-a" class="pure-button">Config</a>
+            </div>
+
+        <div id="tab-main">
+            <div class="pure-control-group">
+                <label for="tc_on">
+                    <strong>Timing control</strong>
+                </label>
+                <a id="tc_on" class="pure-button {{TC_LINK_PRIMARY_ON}}" href="#">ON</a>
+                <a id="tc_off" class="pure-button {{TC_LINK_PRIMARY_OFF}}" href="#">OFF</a>
+            </div>
+            <script>
+            var links = document.querySelectorAll('[id^="tc_on"]');
+            links.forEach(function(link) {
+                link.addEventListener('click', function(event) {
+                    event.preventDefault();
+                    var xhr = new XMLHttpRequest();
+                    xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=true', true);
+                    xhr.send();
+                    console.log('tc=true call');
+                    document.getElementById('tc_on').classList.add('pure-button-primary');
+                    document.getElementById('tc_off').classList.remove('pure-button-primary');
+                });
+            });
+            var links = document.querySelectorAll('[id^="tc_off"]');
+            links.forEach(function(link) {
+                link.addEventListener('click', function(event) {
+                    event.preventDefault();
+                    var xhr = new XMLHttpRequest();
+                    xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=false', true);
+                    xhr.send();
+                    console.log('tc=false call');
+                    document.getElementById('tc_off').classList.add('pure-button-primary');
+                    document.getElementById('tc_on').classList.remove('pure-button-primary');
+                });
+            });
+            </script>
+            <br>
+            <div class="pure-control-group">
+                <label for="transition">Transition time (s)</label>
+                <input id="transition" name="transition" type="text" placeholder="10" value="{{TRANSITION_TIME}}">
+            </div>
+            <br>
+            <script>
+            let timeoutId;
+            function sendSliderValue(x) {
+                x = x - 1;
+                clearTimeout(timeoutId);
+                timeoutId = setTimeout(() => {
+                    var value = document.getElementById(`bri${x}`).value;
+                    var url = `http://{{IP_ADDRESS}}/?bri${x}=${value}`;
+                    fetch(url).then(response => {
+                        if (!response.ok) {
+                            throw new Error(`HTTP error! status: ${response.status}`);
+                        }
+                        console.log(`Sent slider value ${value} to ${url}`);
+                    }).catch(error => {
+                        console.error(`Error sending slider value to ${url}: ${error}`);
+                    });
+                }, 500);
+            }
+            </script>
+        </div><!-- end of main-tab div -->
+            <br>
+            <table border=0>
+                <tr>
+                    <td>
diff --git a/firmware/light_control_html.html b/firmware/data/org/light_control_template.html
similarity index 100%
rename from firmware/light_control_html.html
rename to firmware/data/org/light_control_template.html
diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 629f137..3c546af 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -1,3 +1,4 @@
+//********************************//
 
 #include <ESP8266WiFi.h>
 #include <ESP8266mDNS.h>
@@ -6,13 +7,10 @@
 #include <WiFiManager.h>
 #include <ArduinoJson.h>
 #include <EEPROM.h>
+#include <FS.h>
 
 #include "config.h"
 
-#include "index_html.h"
-#include "light_control_html.h"
-#include "config_html.h"
-
 //********* Config block *********//
 // blue, warmwhite, purple, white&red&green
 // blau, schwarz, rot, weiß
@@ -190,6 +188,59 @@ uint16_t calcPWM(float tbri)
 
 void read_eeprom_config()
 {
+  uint8_t tmp = EEPROM.read(EEPROM_TIMING_CONTROL_ENABLED_ADDRESS);
+  if (tmp == TIMING_CONTROL_DISABLED)
+  {
+    tc_enabled = TIMING_CONTROL_DISABLED;
+
+  } else if (tmp == TIMING_CONTROL_ENABLED)
+  {
+    tc_enabled = TIMING_CONTROL_ENABLED;
+
+  } else {
+    // Write default value
+    EEPROM.write(EEPROM_TIMING_CONTROL_ENABLED_ADDRESS, TIMING_CONTROL_DISABLED);
+    EEPROM.commit();
+    tc_enabled = TIMING_CONTROL_DISABLED;
+    Serial.println("Written default timing control config to EEPROM (disabled)");
+  }
+  Serial.println("Timing Control status: " + (String)tc_enabled);
+
+  if (EEPROM.read(EEPROM_LAST_STATE_STARTUP_ADDRESS) > 2)
+  {
+    // set the default value on uninitialized EEPROM
+    EEPROM.write(EEPROM_LAST_STATE_STARTUP_ADDRESS, 0);
+    EEPROM.commit();
+    Serial.println("Written default 'last state' config to EEPROM");
+  }
+  Serial.println("Last state startup setting: " + (String)EEPROM.read(EEPROM_LAST_STATE_STARTUP_ADDRESS));
+
+  if (EEPROM.read(EEPROM_SCENE_ADDRESS) > 2)
+  {
+    // set the default value on uninitialized EEPROM
+    EEPROM.write(EEPROM_SCENE_ADDRESS, 0);
+    EEPROM.commit();
+    Serial.println("Written default scene config to EEPROM");
+  }
+  Serial.println("Scene setting: " + (String)EEPROM.read(EEPROM_SCENE_ADDRESS));
+
+#ifdef USE_STATIC_IP
+  if (EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS) > 1)
+  {
+    EEPROM.write(EEPROM_DYNAMIC_IP_ADDRESS, 0);
+    EEPROM.commit();
+    Serial.println("Written default dynamic IP setting (disabled) to EEPROM");
+  }
+#else
+  if (EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS) > 1)
+  {
+    EEPROM.write(EEPROM_DYNAMIC_IP_ADDRESS, 1);
+    EEPROM.commit();
+    Serial.println("Written default dynamic IP setting (enabled) to EEPROM");
+  }
+#endif
+  Serial.println("Dynamic IP setting: " + (String)EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS));
+
   for (uint8_t light = 0; light < LIGHTS_COUNT; light++)
   {
     apply_scene(EEPROM.read(EEPROM_SCENE_ADDRESS), light);
@@ -204,45 +255,6 @@ void read_eeprom_config()
     Serial.println("light[" + (String)light + "] = " + (String)light_state[light]);
   }
 
-  uint8_t tmp = EEPROM.read(EEPROM_TIMING_CONTROL_ENABLED_ADDRESS);
-  if (tmp == TIMING_CONTROL_DISABLED)
-  {
-    tc_enabled = TIMING_CONTROL_DISABLED;
-
-  } else if (tmp == TIMING_CONTROL_ENABLED)
-  {
-    tc_enabled = TIMING_CONTROL_ENABLED;
-
-  } else {
-
-    EEPROM.write(EEPROM_TIMING_CONTROL_ENABLED_ADDRESS, TIMING_CONTROL_DISABLED);
-    EEPROM.commit();
-    tc_enabled = TIMING_CONTROL_DISABLED;
-  }
-
-  Serial.println("tc_enabled = " + (String)tc_enabled);
-
-  if (EEPROM.read(EEPROM_LAST_STATE_STARTUP_ADDRESS) == 255)
-  {
-    // set the default value on uninitialized EEPROM
-    EEPROM.write(EEPROM_LAST_STATE_STARTUP_ADDRESS, 0);
-    EEPROM.commit();
-  }
-
-#ifdef USE_STATIC_IP
-  if (EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS) == 255)
-  {
-    EEPROM.write(EEPROM_DYNAMIC_IP_ADDRESS, 0);
-    EEPROM.commit();
-  }
-#else
-  if (EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS) == 255)
-  {
-    EEPROM.write(EEPROM_DYNAMIC_IP_ADDRESS, 1);
-    EEPROM.commit();
-  }
-#endif
-
 }
 
 //********************************//
@@ -251,8 +263,22 @@ void setup()
 {
   EEPROM.begin(256);
 
+  SPIFFS.begin();
+
   Serial.begin(SERIAL_BAUD_RATE);
 
+  Serial.flush();
+  delay(1000);
+
+  Dir dir = SPIFFS.openDir("/");
+  Serial.println("\n\nSPIFFS directory content:");
+  while (dir.next())
+  {
+    String fileName = dir.fileName();
+    size_t fileSize = dir.fileSize();
+    Serial.printf("Datei Name: %s, Größe: %s\n", fileName.c_str(), formatBytes(fileSize).c_str());
+  }
+
   if (EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS) == 0)
   {
     WiFi.config(strip_ip, gateway_ip, subnet_mask, dns);
@@ -293,8 +319,10 @@ void setup()
 
   init_webserver();
 
+  Serial.println("Init timinc control");
   tc_init();
 
+  Serial.println("Starting webserver");
   server.begin();
 }  // end of setup
 
@@ -562,6 +590,7 @@ void init_webserver()
           if (tmp == 0 && EEPROM.read(EEPROM_LAST_STATE_ADDRESS + light) == 0)
           {
             EEPROM.write(EEPROM_LAST_STATE_ADDRESS + light, LIGHT_STATE_ON);
+            EEPROM.commit();
           }
           Serial.print("Light ");
           Serial.print(light);
@@ -574,6 +603,7 @@ void init_webserver()
           if (tmp == 0 && EEPROM.read(EEPROM_LAST_STATE_ADDRESS + light) == 1)
           {
             EEPROM.write(EEPROM_LAST_STATE_ADDRESS + light, LIGHT_STATE_OFF);
+            EEPROM.commit();
           }
           Serial.print("Light ");
           Serial.print(light);
@@ -581,8 +611,6 @@ void init_webserver()
           Serial.println(light_state[light]);
         }
 
-        EEPROM.commit();
-
         if (tc_enabled == TIMING_CONTROL_DISABLED)
         {
           process_lightdata(light, default_transitiontime);
@@ -608,7 +636,8 @@ void init_webserver()
 
     }  // process all lights
 
-    if (server.hasArg("resettc")) {  // reqrite the tc config and reboot
+    if (server.hasArg("resettc"))
+    {  // reqrite the tc config and reboot
       tc_write_default();
       ESP.reset();
     }
@@ -620,17 +649,22 @@ void init_webserver()
 
     // ***** Generate HTML page ***** //
 
-    server.sendHeader("Content-Type", "text/html");
-    server.sendHeader("Connection", "close");
-    server.sendHeader("Access-Control-Allow-Origin", "*");
-    server.send(200);
-    server.sendContent(replacePlaceholder(replaceLightsControl(getIndexHTMLTop())));
-    server.sendContent(replacePlaceholder(getConfigHTML()));
-    server.sendContent(replacePlaceholder(getIndexHTMLBottom()));
+    String tmp1 = genHMTLTop();
+
+    String tmp2 = genLightControlHTML();
+
+    String tmp3 = getIndexHTMLMiddle();
+
+    String tmp4 = genConfigHTML();
+
+    String tmp5 = genHMTLBottom();
+
+    server.send(200, "text/html", tmp1 + tmp2 + tmp3 + tmp4 + tmp5);
+
   });
 
   server.on("/reset", []()
-  {  // trigger manual reset
+  { // trigger manual reset
     server.send(200, "text/html", "reset");
     delay(1000);
     ESP.restart();
@@ -639,9 +673,48 @@ void init_webserver()
   server.onNotFound(handleNotFound);
 }
 
-String replacePlaceholder(String in)
+//********************************//
+
+String genHMTLTop()
+{
+  return replacePlaceholder(getIndexHTMLTop());
+}
+
+String genHMTLBottom()
+{
+  return replacePlaceholder(getIndexHTMLBottom());
+}
+
+String genConfigHTML()
+{
+  // +++++ Generate config part of the page +++++
+  return replacePlaceholder(getConfigHTML());
+}
+
+String genLightControlHTML()
+{
+  String http_content = "";
+  // +++++ Generate lights part of the HTML page +++++
+  // Light control
+  for (uint8 light_num = 0; light_num < LIGHTS_COUNT; light_num++)
+  {
+    // Generate lights part of the HTML page
+    String tmp_light_content = getLightControlHTML();
+
+    // on/off buttons and slider
+    tmp_light_content.replace("{{LIGHT_NUMBER}}", (String)(light_num + 1));
+    tmp_light_content.replace("{{LIGHT_NUMBER_DEC}}", (String)light_num);
+
+    // add the lights code to the html output string
+    http_content += tmp_light_content;
+  }
+  return http_content;
+}
+
+//********************************//
+
+String replacePlaceholder(String http_content)
 {
-  String http_content = in;
 
   http_content.replace("{{LIGHT_NAME}}", (String)light_name);
 
@@ -706,31 +779,27 @@ String replacePlaceholder(String in)
     http_content.replace("{{SCENE_SELECTED_NIGHT_2}}", "");
   }
 
-  // Generate lights part of the HTML page
-  String config_content = getConfigHTML();
-
   // Wifi settings
-  config_content.replace("{{WIFI_SSID}}", WiFi.SSID());
+  http_content.replace("{{WIFI_SSID}}", WiFi.SSID());
 
   // Network settings
   uint8_t dip = EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS);
   if (dip)
   {
-    config_content.replace("{{DIP_LINK_ON_PRIMARY}}", "pure-button-primary");
-    config_content.replace("{{DIP_LINK_OFF_PRIMARY}}", "");
+    http_content.replace("{{DIP_LINK_ON_PRIMARY}}", "pure-button-primary");
+    http_content.replace("{{DIP_LINK_OFF_PRIMARY}}", "");
   } else {
-    config_content.replace("{{DIP_LINK_OFF_PRIMARY}}", "pure-button-primary");
-    config_content.replace("{{DIP_LINK_ON_PRIMARY}}", "");
+    http_content.replace("{{DIP_LINK_OFF_PRIMARY}}", "pure-button-primary");
+    http_content.replace("{{DIP_LINK_ON_PRIMARY}}", "");
   }
 
-  // ip config
-  config_content.replace("{{WIFI_CFG_IP}}", WiFi.localIP().toString());
-  config_content.replace("{{WIFI_CFG_GW}}", WiFi.gatewayIP().toString());
-  config_content.replace("{{WIFI_CFG_NM}}", WiFi.subnetMask().toString());
-  config_content.replace("{{WIFI_CFG_DNS}}", WiFi.dnsIP().toString());
-
-  http_content.replace("{{CONFIG_PAGE}}", config_content);
+  // network config
+  http_content.replace("{{WIFI_CFG_IP}}", WiFi.localIP().toString());
+  http_content.replace("{{WIFI_CFG_GW}}", WiFi.gatewayIP().toString());
+  http_content.replace("{{WIFI_CFG_NM}}", WiFi.subnetMask().toString());
+  http_content.replace("{{WIFI_CFG_DNS}}", WiFi.dnsIP().toString());
 
+  // add the current ip address to the page
   http_content.replace("{{IP_ADDRESS}}", WiFi.localIP().toString());
   
   // set the pwm values
@@ -740,25 +809,73 @@ String replacePlaceholder(String in)
   return http_content;
 }
 
-String replaceLightsControl(String in)
+//********************************//
+
+String loadSPIFFSFile(String fname)
 {
-  String light_content = "";
-  // Light control
-  for (uint8 light_num = 0; light_num < LIGHTS_COUNT; light_num++)
+  File file = SPIFFS.open(fname, "r");
+  if (!file)
   {
-    // Generate lights part of the HTML page
-    String tmp_light_content = getLightControlHTML();
-
-    // on/off buttons and slider
-    tmp_light_content.replace("{{LIGHT_NUMBER}}", (String)(light_num + 1));
-    tmp_light_content.replace("{{LIGHT_NUMBER_DEC}}", (String)light_num);
-
-    // add the lights code to the html output string
-    light_content += tmp_light_content;
+    Serial.println("Failed to open file " + fname);
+    return "";
   }
-
-  // add the created lights control code to the html output
-  in.replace("{{LIGHTS_CONTROL}}", light_content);
-
-  return in;
+  String contents = file.readString();
+  file.close();
+  return contents; 
 }
+
+//********************************//
+
+String getIndexHTMLTop()
+{
+  // load file
+  return loadSPIFFSFile("/index_template_top.html");
+}
+
+String getIndexHTMLMiddle()
+{
+  // load file
+  return loadSPIFFSFile("/index_template_middle.html");
+}
+
+String getIndexHTMLBottom()
+{
+  // load file
+  return loadSPIFFSFile("/index_template_bottom.html");
+}
+
+//********************************//
+
+String getConfigHTML()
+{
+  // load file
+  return loadSPIFFSFile("/config_template.html");
+}
+
+//********************************//
+
+String getLightControlHTML()
+{
+  // load file
+  return loadSPIFFSFile("/light_control_template.html");
+}
+
+//********************************//
+
+String formatBytes(size_t bytes)
+{
+  if (bytes < 1024)
+  {
+    return String(bytes) + " B";
+  } else if (bytes < (1024 * 1024))
+  {
+    return String(bytes / 1024.0) + " KB";
+  } else if (bytes < (1024 * 1024 * 1024))
+  {
+    return String(bytes / 1024.0 / 1024.0) + " MB";
+  } else {
+    return String(bytes / 1024.0 / 1024.0 / 1024.0) + " GB";
+  }
+}
+
+//********************************//
diff --git a/firmware/images/Over.jpg b/firmware/images/Over.jpg
deleted file mode 100755
index 8f6ddab..0000000
Binary files a/firmware/images/Over.jpg and /dev/null differ
diff --git a/firmware/images/Under.jpg b/firmware/images/Under.jpg
deleted file mode 100755
index 87c4456..0000000
Binary files a/firmware/images/Under.jpg and /dev/null differ
diff --git a/firmware/index_html.h b/firmware/index_html.h
deleted file mode 100644
index 1f0042b..0000000
--- a/firmware/index_html.h
+++ /dev/null
@@ -1,283 +0,0 @@
-
-
-String getIndexHTMLTop()
-{
-  String index_html = "<!doctype html>"
-"<html>"
-"<head>"
-"<style></style>"
-"<meta charset=\"utf-8\">"
-"<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">"
-"<title>Light setup - {{LIGHT_NAME}}</title>"
-"<script src=\"https://code.jquery.com/jquery-3.6.0.min.js\"></script>"
-"<script src=\"https://cdn.plot.ly/plotly-latest.min.js\"></script>"
-"<script src=\"https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js\"></script>"
-"<link rel=\"stylesheet\" href=\"https://unpkg.com/purecss@0.6.2/build/pure-min.css\">"
-"</head>"
-"<body>"
-"<fieldset>"
-"<h3>{{LIGHT_NAME}}</h3>"
-"<div class=\"pure-form pure-form-aligned\">"
-"<div class=\"pure-controls\">"
-"<span class=\"pure-form-message\">"
-"<a href=\"/?alert=1\">alert</a>"
-"&nbsp; "
-"<a href=\"/?reset=1\">reset</a>"
-"&nbsp; "
-"<a href=\"/?resettc\">reset timing control data</a>"
-"&nbsp; "
-"<a href=\"/update\">update</a>"
-"</span>"
-"<label for=\"cb\" class=\"pure-checkbox\"></label>"
-"</div>"
-"<br>"
-"<div class=\"pure-control-group\">"
-"<label for=\"tc_on\">"
-"<strong>Timing control</strong>"
-"</label>"
-"<a id=\"tc_on\" class=\"pure-button {{TC_LINK_PRIMARY_ON}}\" href=\"#\">ON</a>"
-"<a id=\"tc_off\" class=\"pure-button {{TC_LINK_PRIMARY_OFF}}\" href=\"#\">OFF</a>"
-"</div>"
-"<script>"
-"var links = document.querySelectorAll('[id^=\"tc_on\"]');"
-"links.forEach(function(link) {"
-"link.addEventListener('click', function(event) {"
-"event.preventDefault();"
-"var xhr = new XMLHttpRequest();"
-"xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=true', true);"
-"xhr.send();"
-"console.log('tc=true call');"
-"document.getElementById('tc_on').classList.add('pure-button-primary');"
-"document.getElementById('tc_off').classList.remove('pure-button-primary');"
-"});"
-"});"
-"var links = document.querySelectorAll('[id^=\"tc_off\"]');"
-"links.forEach(function(link) {"
-"link.addEventListener('click', function(event) {"
-"event.preventDefault();"
-"var xhr = new XMLHttpRequest();"
-"xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=false', true);"
-"xhr.send();"
-"console.log('tc=false call');"
-"document.getElementById('tc_off').classList.add('pure-button-primary');"
-"document.getElementById('tc_on').classList.remove('pure-button-primary');"
-"});"
-"});"
-"</script>"
-"<br>"
-"<div class=\"pure-control-group\">"
-"<label for=\"transition\">Transition time (s)</label>"
-"<input id=\"transition\" name=\"transition\" type=\"text\" placeholder=\"10\" value=\"{{TRANSITION_TIME}}\">"
-"</div>"
-"<br>"
-"<script>"
-"let timeoutId;"
-"function sendSliderValue(x) {"
-"x = x - 1;"
-"clearTimeout(timeoutId);"
-"timeoutId = setTimeout(() => {"
-"var value = document.getElementById(`bri${x}`).value;"
-"var url = `http://{{IP_ADDRESS}}/?bri${x}=${value}`;"
-"fetch(url).then(response => {"
-"if (!response.ok) {"
-"throw new Error(`HTTP error! status: ${response.status}`);"
-"}"
-"console.log(`Sent slider value ${value} to ${url}`);"
-"}).catch(error => {"
-"console.error(`Error sending slider value to ${url}: ${error}`);"
-"});"
-"}, 500);"
-"}"
-"</script>"
-"<br>"
-"<table border=0>"
-"<tr>"
-"<td>"
-"{{LIGHTS_CONTROL}}"
-"</td>"
-"<td>"
-"<div id=\"plot_chart\"></div>"
-"</td>"
-"</tr>"
-"</table>";
-  return index_html;
-}
-
-String getIndexHTMLBottom()
-{
-  const char index_html[] = "<script>"
-"function loadGraphData() {"
-"console.log('----> generate graph <----');"
-"$.getJSON('/tc_data_blocks', function(data) {"
-"var currenttime = [];"
-"var time = [];"
-"var channel1 = [];"
-"var channel2 = [];"
-"var channel3 = [];"
-"var channel4 = [];"
-"for (var i = 0; i < data['tcdata'].length; i++) {"
-"time.push(data['tcdata'][i]['hour'] + ':' + (data['tcdata'][i]['min'] < 10 ? '0' : '') + data['tcdata'][i]['min']);"
-"channel1.push(data['tcdata'][i]['ch1']);"
-"channel2.push(data['tcdata'][i]['ch2']);"
-"channel3.push(data['tcdata'][i]['ch3']);"
-"channel4.push(data['tcdata'][i]['ch4']);"
-"}"
-"currenttime.push(data['currenttime']['hour']);"
-"currenttime.push(data['currenttime']['min']);"
-"console.log(currenttime);"
-"var currentTimeStr = currenttime[0] + ':' + (currenttime[1] < 10 ? '0' : '') + currenttime[1];"
-"var index = time.indexOf(currentTimeStr);"
-"if (index === -1) {"
-"var lowerIndex = -1;"
-"var upperIndex = -1;"
-"for (var i = 0; i < time.length - 1; i++) {"
-"console.log(time[i] + ' <= ' + currentTimeStr + ' >= ' + time[i + 1]);"
-"const currentDate = new Date();"
-"const year = currentDate.getFullYear();"
-"const month = (currentDate.getMonth() + 1).toString().padStart(2, '0');"
-"const day = currentDate.getDate().toString().padStart(2, '0');"
-"const dateString = `${year}-${month}-${day}`;"
-"const start = moment(dateString + ' ' + time[i], 'YYYY-MM-DD HH:mm');"
-"const curr = moment(dateString + ' ' + currentTimeStr, 'YYYY-MM-DD HH:mm');"
-"const end = moment(dateString + ' ' + time[i + 1], 'YYYY-MM-DD HH:mm');"
-"console.log(start.format('YYYY-MM-DD HH:mm') + ' <= ' + curr.format('YYYY-MM-DD HH:mm') + ' >= ' + end.format('YYYY-MM-DD HH:mm'));"
-"console.log(curr.isBetween(start, end));"
-"if (curr.isBetween(start, end)) {"
-"lowerIndex = i;"
-"upperIndex = i + 1;"
-"break;"
-"}"
-"}"
-"console.log('lowerIndex=' + lowerIndex);"
-"console.log('upperIndex=' + upperIndex);"
-"if (lowerIndex === -1 || upperIndex === -1) {"
-"console.log(\"Error: Current time not found in time array and not between two elements in time array.\");"
-"lowerIndex = 0;"
-"upperIndex = 1;"
-"var tmp1 = time[0].split(':');"
-"console.log('tmp1 = ' + tmp1);"
-"currenttime[0] = tmp1[0];"
-"currenttime[1] = tmp1[1];"
-"}"
-"var lowerTime = time[lowerIndex].split(\":\");"
-"var upperTime = time[upperIndex].split(\":\");"
-"var timeDiff = (currenttime[0] - lowerTime[0]) + ((currenttime[1] - lowerTime[1]) / 60);"
-"var indexFloat = lowerIndex + timeDiff / ((upperTime[0] - lowerTime[0]) + ((upperTime[1] - lowerTime[1]) / 60));"
-"console.log(\"Index (float): \" + indexFloat);"
-"} else {"
-"console.log(\"Index (integer): \" + index);"
-"console.log(\"Index (float): \" + index);"
-"}"
-"if (indexFloat > index) {"
-"index = indexFloat;"
-"}"
-"console.log(\"index in graph >>>\" + index);"
-"var trace1 = {"
-"x: time,"
-"y: channel1,"
-"name: 'Channel 1',"
-"type: 'scatter',"
-"mode: 'lines+markers',"
-"};"
-"var trace2 = {"
-"x: time,"
-"y: channel2,"
-"name: 'Channel 2',"
-"type: 'scatter',"
-"mode: 'lines+markers',"
-"};"
-"var trace3 = {"
-"x: time,"
-"y: channel3,"
-"name: 'Channel 3',"
-"type: 'scatter',"
-"mode: 'lines+markers',"
-"};"
-"var trace4 = {"
-"x: time,"
-"y: channel4,"
-"name: 'Channel 4',"
-"type: 'scatter',"
-"mode: 'lines+markers',"
-"};"
-"var layout = {"
-"title: 'Timing Control Data Blocks',"
-"xaxis: {"
-"title: 'Time',"
-"tickangle: -45,"
-"},"
-"yaxis: {"
-"title: 'Brightness',"
-"range: [0, 255],"
-"},"
-"shapes: [{"
-"type: 'line',"
-"x0: index,"
-"y0: 0,"
-"x1: index,"
-"y1: 255,"
-"line: {"
-"color: 'lightgrey',"
-"width: 3,"
-"dash: 'dot'"
-"}"
-"}]"
-"};"
-"Plotly.newPlot('plot_chart', [trace1, trace2, trace3, trace4], layout);"
-"});"
-"}"
-"setInterval(loadGraphData, 10000);"
-"loadGraphData();"
-""
-"function updateLightState() {"
-"console.log('----> setting bri and power switch <----');"
-"for (let i = 1; i <= {{LIGHT_COUNT}}; i++) {"
-"const lightURL = `http://{{IP_ADDRESS}}/state?light=${i}`;"
-"fetch(lightURL).then(response => response.json()).then(data => {"
-"const briSlider = document.getElementById(`bri${i - 1}`);"
-"const briSliderVal = document.getElementById(`bri${i - 1}_val`);"
-"const onLinkOn = document.getElementById(`on${i - 1}_on`);"
-"const onLinkOff = document.getElementById(`on${i - 1}_off`);"
-"briSlider.value = data.bri;"
-"briSliderVal.innerHTML = (Math.round((data.bri * 100.0 / 255.0) * 100) / 100).toFixed(2);"
-"console.log('data.on ' + i + ' = ' + data.on);"
-"if (data.on == true) {"
-"onLinkOn.classList.add('pure-button-primary');"
-"onLinkOff.classList.remove('pure-button-primary');"
-"} else {"
-"onLinkOn.classList.remove('pure-button-primary');"
-"onLinkOff.classList.add('pure-button-primary');"
-"}"
-"}).catch(error => console.error(error));"
-"}"
-"}"
-"setInterval(updateLightState, 10000);"
-"updateLightState();"
-""
-"function updatePWMValues() {"
-"console.log('----> setting pwm data <----');"
-"for (let i = 0; i < {{LIGHT_COUNT}}; i++) {"
-"const lightID = i + 1;"
-"const pwmElement = document.getElementById(`light${i}_pwm`);"
-"const pwmElementTxt = document.getElementById(`light${i}_pwm_txt`);"
-"if (pwmElement) {"
-"const url = `http://{{IP_ADDRESS}}/state?light=${lightID}`;"
-"fetch(url).then(response => response.json()).then(data => {"
-"const pwmValue = ((Math.round((data.curpwm - ((data.curpwm >= {{PWM_MIN}}) ? {{PWM_MIN}} : 0)) / {{PWM_MAX}} * 10000) / 100).toFixed(2));"
-"console.log('curpwm[' + i + '] = ' + data.curpwm + ' = ' + pwmValue);"
-"pwmElement.innerText = pwmValue.toString();"
-"pwmElement.value = pwmValue;"
-"pwmElementTxt.innerText = pwmValue.toString();"
-"}).catch(error => console.error(error));"
-"}"
-"}"
-"}"
-"updatePWMValues();"
-"setInterval(updatePWMValues, 5000);"
-"</script>"
-"</div>"
-"</fieldset>"
-"</body>"
-"</html>";
-  return String(index_html);
-}
diff --git a/firmware/light_control_html.h b/firmware/light_control_html.h
deleted file mode 100644
index 63517c4..0000000
--- a/firmware/light_control_html.h
+++ /dev/null
@@ -1,34 +0,0 @@
-
-String getLightControlHTML()
-{
-  String light_control_html = "<h4>Light {{LIGHT_NUMBER}}</h4>"
-"<div class=\"pure-control-group\">"
-"<label for=\"power\">"
-"<strong>Power</strong>"
-"</label>"
-"<a id=\"on{{LIGHT_NUMBER_DEC}}_on\" class=\"pure-button\" href=\"#\">ON</a>"
-"<a id=\"on{{LIGHT_NUMBER_DEC}}_off\" class=\"pure-button\" href=\"#\">OFF</a>"
-"</div>"
-"<div class=\"pure-control-group\">"
-"<label for=\"bri{{LIGHT_NUMBER_DEC}}\">Bri</label>"
-"<input id=\"bri{{LIGHT_NUMBER_DEC}}\" onchange=\"sendSliderValue({{LIGHT_NUMBER}})\" name=\"bri{{LIGHT_NUMBER_DEC}}\" type=\"range\" min=\"0\" max=\"255\" value=\"25\">"
-"&nbsp;"
-"<span id=\"bri{{LIGHT_NUMBER_DEC}}_val\" name=\"bri{{LIGHT_NUMBER_DEC}}\">9</span>"
-"%"
-"<br>"
-"<label for=\"light{{LIGHT_NUMBER_DEC}}_pwm\">PWM-Value</label>"
-"<input type=\"range\" min=\"0\" max=\"100\" value=\"0\" id=\"light{{LIGHT_NUMBER_DEC}}_pwm\" disabled>"
-"&nbsp;"
-"<span id=\"light{{LIGHT_NUMBER_DEC}}_pwm_txt\"></span>"
-"%"
-"<script>"
-"var slider{{LIGHT_NUMBER_DEC}} = document.getElementById(\"bri{{LIGHT_NUMBER_DEC}}\");"
-"var output{{LIGHT_NUMBER_DEC}} = document.getElementById(\"bri{{LIGHT_NUMBER_DEC}}_val\");"
-"output{{LIGHT_NUMBER_DEC}}.innerHTML = (Math.round((slider{{LIGHT_NUMBER_DEC}}.value * 100.0 / 255.0) * 100) / 100).toFixed(2);"
-"slider{{LIGHT_NUMBER_DEC}}.oninput = function() {"
-"output{{LIGHT_NUMBER_DEC}}.innerHTML = (Math.round((this.value * 100.0 / 255.0) * 100) / 100).toFixed(2);"
-"}"
-"</script>"
-"</div>";
-  return light_control_html;
-}
diff --git a/tools/html2string.sh b/tools/html2string.sh
index a339e62..bb59438 100644
--- a/tools/html2string.sh
+++ b/tools/html2string.sh
@@ -1,5 +1,4 @@
 #!/bin/bash
 
-cat $1 | sed -e"s/^ *//ig" | sed -e 's/"/\\"/ig' | sed -e "s/^/\"/ig" | sed -e "s/$/\"/ig"
-echo ";"
+cat $1 | sed -e"s/^ *//ig"