diff --git a/3d/Super Vihelmo-Trug-2.stl b/3d/Super Vihelmo-Trug-2.stl
new file mode 100644
index 0000000..817abf6
Binary files /dev/null and b/3d/Super Vihelmo-Trug-2.stl differ
diff --git a/3d/Super Vihelmo-Trug-3.stl b/3d/Super Vihelmo-Trug-3.stl
new file mode 100644
index 0000000..74685c4
Binary files /dev/null and b/3d/Super Vihelmo-Trug-3.stl differ
diff --git a/3d/Super Vihelmo-Trug-4.stl b/3d/Super Vihelmo-Trug-4.stl
new file mode 100644
index 0000000..b8a0bbf
Binary files /dev/null and b/3d/Super Vihelmo-Trug-4.stl differ
diff --git a/3d/Super Vihelmo-Trug-5.stl b/3d/Super Vihelmo-Trug-5.stl
new file mode 100644
index 0000000..655fdbf
Binary files /dev/null and b/3d/Super Vihelmo-Trug-5.stl differ
diff --git a/3d/Super Vihelmo-Trug.stl b/3d/Super Vihelmo-Trug.stl
new file mode 100644
index 0000000..b4d8798
Binary files /dev/null and b/3d/Super Vihelmo-Trug.stl differ
diff --git a/README.md b/README.md
index f43b7ae..fa69e73 100644
--- a/README.md
+++ b/README.md
@@ -25,3 +25,6 @@ All except of the timing control data block.
 
 You have to click at the link "reset timing control data" on the webinterface.
 
+Sample schematics (no NodeMCU pins defined in there)
+
+![Sample schematics](pic/schematics.png)
diff --git a/firmware/data/bottom.js b/firmware/data/bottom.js
index 976c0d9..8459e2f 100644
--- a/firmware/data/bottom.js
+++ b/firmware/data/bottom.js
@@ -13,6 +13,7 @@ tabTDE.classList.remove("visible");
 amain.classList.add("pure-button-primary");
 acfg.classList.remove("pure-button-primary");
 atde.classList.remove("pure-button-primary");
+loadGraphData();
 });
 acfg.addEventListener("click", function() {
 tabMain.classList.remove("visible");
@@ -50,10 +51,10 @@ 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']);
+channel1.push(data['tcdata'][i]['ch1'] * 100 / 255);
+channel2.push(data['tcdata'][i]['ch2'] * 100 / 255);
+channel3.push(data['tcdata'][i]['ch3'] * 100 / 255);
+channel4.push(data['tcdata'][i]['ch4'] * 100 / 255);
 }
 currenttime.push(data['currenttime']['hour']);
 currenttime.push(data['currenttime']['min']);
@@ -130,7 +131,7 @@ tickangle: -45,
 },
 yaxis: {
 title: 'Brightness',
-range: [0, 255],
+range: [0, 100],
 },
 shapes: [{
 type: 'line',
@@ -150,6 +151,119 @@ Plotly.newPlot('plot_chart', [trace1, trace2, trace3, trace4], layout);
 }
 setInterval(loadGraphData, 10000);
 loadGraphData();
+function loadTCGraphData() {
+console.log('----> generate tc data graph <----');
+var data = JSON.parse(createJsonFromTable());
+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'] * 100 / 255);
+channel2.push(data['tcdata'][i]['ch2'] * 100 / 255);
+channel3.push(data['tcdata'][i]['ch3'] * 100 / 255);
+channel4.push(data['tcdata'][i]['ch4'] * 100 / 255);
+}
+currenttime.push(data['currenttime']['hour']);
+currenttime.push(data['currenttime']['min']);
+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++) {
+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');
+if (curr.isBetween(start, end)) {
+lowerIndex = i;
+upperIndex = i + 1;
+break;
+}
+}
+if (lowerIndex === -1 || upperIndex === -1) {
+console.log("Error: Current time not found in time array and not between two elements in time array. Fixing it...");
+lowerIndex = 0;
+upperIndex = 1;
+var tmp1 = time[0].split(':');
+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));
+} else {
+}
+if (indexFloat > index) {
+index = indexFloat;
+}
+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, 100],
+},
+shapes: [{
+type: 'line',
+x0: index,
+y0: 0,
+x1: index,
+y1: 255,
+line: {
+color: 'lightgrey',
+width: 3,
+dash: 'dot'
+}
+}]
+};
+Plotly.newPlot('tc_plot_chart', [trace1, trace2, trace3, trace4], layout);
+}
+setInterval(function() {
+if (document.getElementById('tab-tde').classList.contains('visible')) {
+loadTCGraphData();
+}
+}, 2000);
 function updateLightState() {
 console.log('----> setting bri and power switch <----');
 for (let i = 1; i <= {{LIGHT_COUNT}}; i++) {
@@ -196,9 +310,36 @@ var links = document.querySelectorAll('[id^="on"][id$="_off"]');
 links.forEach(function(link) {
 link.addEventListener('click', function(event) {
 event.preventDefault();
+var id_full = this.id;
 var id = this.id.replace('on', '').replace('_off', '');
 var xhr = new XMLHttpRequest();
 xhr.open('GET', 'http://{{IP_ADDRESS}}/?on' + id + '=false&transition=' + document.getElementById('transition').value, true);
+xhr.onreadystatechange = function () {
+if (xhr.readyState === 4) {
+var button = document.getElementById(id_full);
+if (xhr.status === 200) {
+button.classList.remove("pure-button-primary");
+button.classList.add("success");
+button.innerHTML = "Disabled!";
+setTimeout(function () {
+button.classList.remove("success");
+button.classList.add("pure-button-primary");
+button.innerHTML = "OFF";
+}, 2000);
+console.log('Data successfully sent to server!');
+} else {
+button.classList.remove("pure-button-primary");
+button.classList.add("error");
+button.innerHTML = "Error!";
+setTimeout(function () {
+button.classList.remove("error");
+button.classList.add("pure-button-primary");
+button.innerHTML = "OFF";
+}, 2000);
+console.log('Error while sending data to server.');
+}
+}
+};
 xhr.send();
 updateLightState();
 this.classList.add('pure-button-primary');
@@ -209,9 +350,36 @@ var links = document.querySelectorAll('[id^="on"][id$="_on"]');
 links.forEach(function(link) {
 link.addEventListener('click', function(event) {
 event.preventDefault();
+var id_full = this.id;
 var id = this.id.replace('on', '').replace('_on', '');
 var xhr = new XMLHttpRequest();
 xhr.open('GET', 'http://{{IP_ADDRESS}}/?on' + id + '=true&transition=' + document.getElementById('transition').value, true);
+xhr.onreadystatechange = function () {
+if (xhr.readyState === 4) {
+var button = document.getElementById(id_full);
+if (xhr.status === 200) {
+button.classList.remove("pure-button-primary");
+button.classList.add("success");
+button.innerHTML = "Enabled!";
+setTimeout(function () {
+button.classList.remove("success");
+button.classList.add("pure-button-primary");
+button.innerHTML = "ON";
+}, 2000);
+console.log('Data successfully sent to server!');
+} else {
+button.classList.remove("pure-button-primary");
+button.classList.add("error");
+button.innerHTML = "Error!";
+setTimeout(function () {
+button.classList.remove("error");
+button.classList.add("pure-button-primary");
+button.innerHTML = "ON";
+}, 2000);
+console.log('Error while sending data to server.');
+}
+}
+};
 xhr.send();
 updateLightState();
 this.classList.add('pure-button-primary');
@@ -231,22 +399,22 @@ headerRow.appendChild(th);
 table.appendChild(headerRow);
 for (var i = 1; i <= 10; i++) {
 var tr = document.createElement("tr");
-var tdHour = createSelectCell(23, 0);
+var tdHour = createSelectCell(23, 0, 1);
 tdHour.id = "hour" + i;
 tr.appendChild(tdHour);
-var tdMinute = createSelectCell(59, 0);
+var tdMinute = createSelectCell(59, 0, 1);
 tdMinute.id = "minute" + i;
 tr.appendChild(tdMinute);
-var tdCh1 = createSelectCell(100, 0);
+var tdCh1 = createSelectCell(100, 0, 1);
 tdCh1.id = "ch1_" + i;
 tr.appendChild(tdCh1);
-var tdCh2 = createSelectCell(100, 0);
+var tdCh2 = createSelectCell(100, 0, 1);
 tdCh2.id = "ch2_" + i;
 tr.appendChild(tdCh2);
-var tdCh3 = createSelectCell(100, 0);
+var tdCh3 = createSelectCell(100, 0, 1);
 tdCh3.id = "ch3_" + i;
 tr.appendChild(tdCh3);
-var tdCh4 = createSelectCell(100, 0);
+var tdCh4 = createSelectCell(100, 0, 1);
 tdCh4.id = "ch4_" + i;
 tr.appendChild(tdCh4);
 table.appendChild(tr);
@@ -256,9 +424,9 @@ container.innerHTML = "";
 container.classList.add("pure-form");
 container.appendChild(table);
 }
-function createSelectCell(max, value) {
+function createSelectCell(max, value, step) {
 var select = document.createElement("select");
-for (var i = 0; i <= max; i++) {
+for (var i = 0; i <= max; i += step) {
 var option = document.createElement("option");
 option.value = i;
 option.text = i;
@@ -278,11 +446,12 @@ for (var i = 0; i < tcdata.length; i++) {
 var row = document.getElementById("hour" + (i+1)).parentNode;
 row.cells[0].childNodes[0].value = tcdata[i].hour;
 row.cells[1].childNodes[0].value = tcdata[i].min;
-row.cells[2].childNodes[0].value = parseInt(tcdata[i].ch1 * 100 / 255);
-row.cells[3].childNodes[0].value = parseInt(tcdata[i].ch2 * 100 / 255);
-row.cells[4].childNodes[0].value = parseInt(tcdata[i].ch3 * 100 / 255);
-row.cells[5].childNodes[0].value = parseInt(tcdata[i].ch4 * 100 / 255);
+row.cells[2].childNodes[0].value = parseInt(Math.round(tcdata[i].ch1 * 100 / 255));
+row.cells[3].childNodes[0].value = parseInt(Math.round(tcdata[i].ch2 * 100 / 255));
+row.cells[4].childNodes[0].value = parseInt(Math.round(tcdata[i].ch3 * 100 / 255));
+row.cells[5].childNodes[0].value = parseInt(Math.round(tcdata[i].ch4 * 100 / 255));
 }
+loadTCGraphData();
 });
 }
 function createJsonFromTable() {
@@ -300,20 +469,40 @@ tcdata.push({hour: hour, min: min, ch1: ch1, ch2: ch2, ch3: ch3, ch4: ch4});
 }
 var currentTime = {hour: new Date().getHours(), min: new Date().getMinutes()};
 var jsonData = {tcdata: tcdata, currenttime: currentTime};
-console.log("jsonData = " + JSON.stringify(jsonData));
 return JSON.stringify(jsonData);
 }
 function sendDataToServer() {
 var jsonData = createJsonFromTable();
 var urlEncodedData = encodeURIComponent(jsonData);
 var url = 'http://{{IP_ADDRESS}}/tc_data_blocks_store?data=' + urlEncodedData;
-console.log("url so save = " + url);
 var xhr = new XMLHttpRequest();
 xhr.open('GET', url, true);
-xhr.onreadystatechange = function() {
-if (xhr.readyState === 4 && xhr.status === 200) {
+xhr.onreadystatechange = function () {
+if (xhr.readyState === 4) {
+var button = document.getElementById("save-button");
+if (xhr.status === 200) {
+button.classList.remove("pure-button-primary");
+button.classList.add("success");
+button.innerHTML = "Saved!";
+setTimeout(function () {
+button.classList.remove("success");
+button.classList.add("pure-button-primary");
+button.innerHTML = "save";
+}, 2000);
 console.log('Data successfully sent to server!');
+} else {
+button.classList.remove("pure-button-primary");
+button.classList.add("error");
+button.innerHTML = "Error!";
+setTimeout(function () {
+button.classList.remove("error");
+button.classList.add("pure-button-primary");
+button.innerHTML = "save";
+}, 2000);
+console.log('Error while sending data to server.');
+}
 }
 };
 xhr.send();
+loadTCGraphData();
 }
diff --git a/firmware/data/config_template.html b/firmware/data/config_template.html
index 820b72a..da7ca3b 100644
--- a/firmware/data/config_template.html
+++ b/firmware/data/config_template.html
@@ -1,70 +1,70 @@
-<div id="tab-config" class="">
-<form class="pure-form pure-form-aligned" action="/" method="post">
-<br>
-<label for="startup">
-<strong>Light initialization</strong>
-</label>
-<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>
-<label for="startup">
-<strong>Wifi</strong>
-</label>
-<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>
-<label for="startup">
-<strong>Network</strong>
-</label>
-<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>
-</div><!-- end of config div -->
+<div id="tab-config" class="">
+<form class="pure-form pure-form-aligned" action="/" method="post">
+<br>
+<label for="startup">
+<strong>Light initialization</strong>
+</label>
+<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>
+<label for="startup">
+<strong>Wifi</strong>
+</label>
+<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>
+<label for="startup">
+<strong>Network</strong>
+</label>
+<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>
+</div><!-- end of config div -->
diff --git a/firmware/data/index_template_bottom.html b/firmware/data/index_template_bottom.html
index c1156c1..f401ad3 100644
--- a/firmware/data/index_template_bottom.html
+++ b/firmware/data/index_template_bottom.html
@@ -6,10 +6,20 @@
 <strong>Timming control data editor</strong>
 </label>
 <br>
-<div id="table-container">
+<table>
+<tr>
+<td>
+<div id="table-container" class="top-align">
 </div>
+</td>
+<td>
+<div id="tc_plot_chart" class="top-align">
+</div>
+</td>
+</tr>
+</table>
 <br>
-<a href="#" class="pure-button pure-button-primary" onclick="sendDataToServer();">save</a>
+<a href="#" id="save-button" class="pure-button pure-button-primary" onclick="sendDataToServer();">save</a>
 </div>
 </div> <!-- end of tab-tde -->
 <script src="http://{{IP_ADDRESS}}/js_bottom">
diff --git a/firmware/data/index_template_middle.html b/firmware/data/index_template_middle.html
index 6155028..c81a265 100644
--- a/firmware/data/index_template_middle.html
+++ b/firmware/data/index_template_middle.html
@@ -1,7 +1,7 @@
 <!-- middle -->
 </td>
 <td>
-<div id="plot_chart"></div>
+<div id="plot_chart" class="top-align"></div>
 </td>
 </tr>
 </table>
diff --git a/firmware/data/index_template_top.html b/firmware/data/index_template_top.html
index 7f237d0..66e10a9 100644
--- a/firmware/data/index_template_top.html
+++ b/firmware/data/index_template_top.html
@@ -47,4 +47,4 @@
 <br>
 <table border=0>
 <tr>
-<td>
+<td class="top-align">
diff --git a/firmware/data/light_control_template.html b/firmware/data/light_control_template.html
index 88e7f86..783a584 100644
--- a/firmware/data/light_control_template.html
+++ b/firmware/data/light_control_template.html
@@ -1,29 +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>
+<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}}">Target brightness</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">Actual Bri.</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/data/style.css b/firmware/data/style.css
index e39a471..9788312 100644
--- a/firmware/data/style.css
+++ b/firmware/data/style.css
@@ -40,4 +40,7 @@ cursor: pointer;
 }
 .pure-button:hover {
 background-color: #333;
+}
+.top-align {
+vertical-align: top;
 }
\ No newline at end of file
diff --git a/firmware/data/top.js b/firmware/data/top.js
index 373f487..7c1839a 100644
--- a/firmware/data/top.js
+++ b/firmware/data/top.js
@@ -4,6 +4,32 @@ link.addEventListener('click', function(event) {
 event.preventDefault();
 var xhr = new XMLHttpRequest();
 xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=true', true);
+xhr.onreadystatechange = function () {
+if (xhr.readyState === 4) {
+var button = document.getElementById("tc_on");
+if (xhr.status === 200) {
+button.classList.remove("pure-button-primary");
+button.classList.add("success");
+button.innerHTML = "Enabled!";
+setTimeout(function () {
+button.classList.remove("success");
+button.classList.add("pure-button-primary");
+button.innerHTML = "ON";
+}, 2000);
+console.log('Data successfully sent to server!');
+} else {
+button.classList.remove("pure-button-primary");
+button.classList.add("error");
+button.innerHTML = "Error!";
+setTimeout(function () {
+button.classList.remove("error");
+button.classList.add("pure-button-primary");
+button.innerHTML = "ON";
+}, 2000);
+console.log('Error while sending data to server.');
+}
+}
+};
 xhr.send();
 document.getElementById('tc_on').classList.add('pure-button-primary');
 document.getElementById('tc_off').classList.remove('pure-button-primary');
@@ -15,6 +41,32 @@ link.addEventListener('click', function(event) {
 event.preventDefault();
 var xhr = new XMLHttpRequest();
 xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=false', true);
+xhr.onreadystatechange = function () {
+if (xhr.readyState === 4) {
+var button = document.getElementById("tc_off");
+if (xhr.status === 200) {
+button.classList.remove("pure-button-primary");
+button.classList.add("success");
+button.innerHTML = "Disabled!";
+setTimeout(function () {
+button.classList.remove("success");
+button.classList.add("pure-button-primary");
+button.innerHTML = "OFF";
+}, 2000);
+console.log('Data successfully sent to server!');
+} else {
+button.classList.remove("pure-button-primary");
+button.classList.add("error");
+button.innerHTML = "Error!";
+setTimeout(function () {
+button.classList.remove("error");
+button.classList.add("pure-button-primary");
+button.innerHTML = "OFF";
+}, 2000);
+console.log('Error while sending data to server.');
+}
+}
+};
 xhr.send();
 document.getElementById('tc_off').classList.add('pure-button-primary');
 document.getElementById('tc_on').classList.remove('pure-button-primary');
diff --git a/firmware/html/bottom.js b/firmware/html/bottom.js
index c19e1bd..69dc709 100644
--- a/firmware/html/bottom.js
+++ b/firmware/html/bottom.js
@@ -19,6 +19,8 @@ function addTabListener() {
             amain.classList.add("pure-button-primary");
             acfg.classList.remove("pure-button-primary");
             atde.classList.remove("pure-button-primary");
+
+            loadGraphData(); // reload the graph
         });
 
         acfg.addEventListener("click", function() {
@@ -64,10 +66,10 @@ function loadGraphData() {
         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']);
+            channel1.push(data['tcdata'][i]['ch1'] * 100 / 255);
+            channel2.push(data['tcdata'][i]['ch2'] * 100 / 255);
+            channel3.push(data['tcdata'][i]['ch3'] * 100 / 255);
+            channel4.push(data['tcdata'][i]['ch4'] * 100 / 255);
         }
         currenttime.push(data['currenttime']['hour']);
         currenttime.push(data['currenttime']['min']);
@@ -155,7 +157,7 @@ function loadGraphData() {
             },
             yaxis: {
                 title: 'Brightness',
-                range: [0, 255],
+                range: [0, 100],
             },
             shapes: [{
                 type: 'line',
@@ -176,6 +178,135 @@ function loadGraphData() {
 setInterval(loadGraphData, 10000);
 loadGraphData();
 
+function loadTCGraphData() {
+    console.log('----> generate tc data graph <----');
+
+    var data = JSON.parse(createJsonFromTable());
+    //console.log(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'] * 100 / 255);
+        channel2.push(data['tcdata'][i]['ch2'] * 100 / 255);
+        channel3.push(data['tcdata'][i]['ch3'] * 100 / 255);
+        channel4.push(data['tcdata'][i]['ch4'] * 100 / 255);
+    }
+    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. Fixing it...");
+            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, 100],
+        },
+        shapes: [{
+            type: 'line',
+            x0: index,
+            y0: 0,
+            x1: index,
+            y1: 255,
+            line: {
+                color: 'lightgrey',
+                width: 3,
+                dash: 'dot'
+            }
+        }]
+    };
+    Plotly.newPlot('tc_plot_chart', [trace1, trace2, trace3, trace4], layout);
+
+}
+
+setInterval(function() {
+    if (document.getElementById('tab-tde').classList.contains('visible')) {
+        loadTCGraphData();
+    }
+}, 2000);
+
 function updateLightState() {
     console.log('----> setting bri and power switch <----');
     for (let i = 1; i <= {{LIGHT_COUNT}}; i++) {
@@ -230,10 +361,39 @@ links.forEach(function(link) {
         // Verhindere, dass der Link die Seite neu lädt
         event.preventDefault();
         // Extrahiere die Zahl aus der ID des Links
+        var id_full = this.id;
         var id = this.id.replace('on', '').replace('_off', '');
         // Erstelle eine neue Anfrage an die entsprechende URL
         var xhr = new XMLHttpRequest();
         xhr.open('GET', 'http://{{IP_ADDRESS}}/?on' + id + '=false&transition=' + document.getElementById('transition').value, true);
+
+        xhr.onreadystatechange = function () {
+            if (xhr.readyState === 4) {
+                var button = document.getElementById(id_full);
+                if (xhr.status === 200) {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("success");
+                    button.innerHTML = "Disabled!";
+                    setTimeout(function () {
+                        button.classList.remove("success");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "OFF";
+                    }, 2000);
+                    console.log('Data successfully sent to server!');
+                } else {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("error");
+                    button.innerHTML = "Error!";
+                    setTimeout(function () {
+                        button.classList.remove("error");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "OFF";
+                    }, 2000);
+                    console.log('Error while sending data to server.');
+                }
+            }
+        };
+
         // Sende die Anfrage im Hintergrund
         xhr.send();
         updateLightState();
@@ -249,10 +409,39 @@ links.forEach(function(link) {
         // Verhindere, dass der Link die Seite neu lädt
         event.preventDefault();
         // Extrahiere die Zahl aus der ID des Links
+        var id_full = this.id;
         var id = this.id.replace('on', '').replace('_on', '');
         // Erstelle eine neue Anfrage an die entsprechende URL
         var xhr = new XMLHttpRequest();
         xhr.open('GET', 'http://{{IP_ADDRESS}}/?on' + id + '=true&transition=' + document.getElementById('transition').value, true);
+
+        xhr.onreadystatechange = function () {
+            if (xhr.readyState === 4) {
+                var button = document.getElementById(id_full);
+                if (xhr.status === 200) {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("success");
+                    button.innerHTML = "Enabled!";
+                    setTimeout(function () {
+                        button.classList.remove("success");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "ON";
+                    }, 2000);
+                    console.log('Data successfully sent to server!');
+                } else {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("error");
+                    button.innerHTML = "Error!";
+                    setTimeout(function () {
+                        button.classList.remove("error");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "ON";
+                    }, 2000);
+                    console.log('Error while sending data to server.');
+                }
+            }
+        };
+
         // Sende die Anfrage im Hintergrund
         xhr.send();
         updateLightState();
@@ -283,32 +472,32 @@ function createTable() {
       var tr = document.createElement("tr");
   
       // Stunde
-      var tdHour = createSelectCell(23, 0);
+      var tdHour = createSelectCell(23, 0, 1);
       tdHour.id = "hour" + i;
       tr.appendChild(tdHour);
   
       // Minute
-      var tdMinute = createSelectCell(59, 0);
+      var tdMinute = createSelectCell(59, 0, 1);
       tdMinute.id = "minute" + i;
       tr.appendChild(tdMinute);
   
       // ch1
-      var tdCh1 = createSelectCell(100, 0);
+      var tdCh1 = createSelectCell(100, 0, 1);
       tdCh1.id = "ch1_" + i;
       tr.appendChild(tdCh1);
   
       // ch2
-      var tdCh2 = createSelectCell(100, 0);
+      var tdCh2 = createSelectCell(100, 0, 1);
       tdCh2.id = "ch2_" + i;
       tr.appendChild(tdCh2);
   
       // ch3
-      var tdCh3 = createSelectCell(100, 0);
+      var tdCh3 = createSelectCell(100, 0, 1);
       tdCh3.id = "ch3_" + i;
       tr.appendChild(tdCh3);
   
       // ch4
-      var tdCh4 = createSelectCell(100, 0);
+      var tdCh4 = createSelectCell(100, 0, 1);
       tdCh4.id = "ch4_" + i;
       tr.appendChild(tdCh4);
   
@@ -321,12 +510,12 @@ function createTable() {
     container.appendChild(table);
 }
   
-function createSelectCell(max, value) {
+function createSelectCell(max, value, step) {
     // Erstelle ein neues select-Element
     var select = document.createElement("select");
 
     // Füge Optionen hinzu
-    for (var i = 0; i <= max; i++) {
+    for (var i = 0; i <= max; i += step) {
         var option = document.createElement("option");
         option.value = i;
         option.text = i;
@@ -355,11 +544,13 @@ function fillTableFromJson() {
             var row = document.getElementById("hour" + (i+1)).parentNode;
             row.cells[0].childNodes[0].value = tcdata[i].hour;
             row.cells[1].childNodes[0].value = tcdata[i].min;
-            row.cells[2].childNodes[0].value = parseInt(tcdata[i].ch1 * 100 / 255);
-            row.cells[3].childNodes[0].value = parseInt(tcdata[i].ch2 * 100 / 255);
-            row.cells[4].childNodes[0].value = parseInt(tcdata[i].ch3 * 100 / 255);
-            row.cells[5].childNodes[0].value = parseInt(tcdata[i].ch4 * 100 / 255);
+            row.cells[2].childNodes[0].value = parseInt(Math.round(tcdata[i].ch1 * 100 / 255));
+            row.cells[3].childNodes[0].value = parseInt(Math.round(tcdata[i].ch2 * 100 / 255));
+            row.cells[4].childNodes[0].value = parseInt(Math.round(tcdata[i].ch3 * 100 / 255));
+            row.cells[5].childNodes[0].value = parseInt(Math.round(tcdata[i].ch4 * 100 / 255));
         }
+
+        loadTCGraphData();
     });
 }
 
@@ -380,7 +571,7 @@ function createJsonFromTable() {
     }
     var currentTime = {hour: new Date().getHours(), min: new Date().getMinutes()};
     var jsonData = {tcdata: tcdata, currenttime: currentTime};
-    console.log("jsonData = " + JSON.stringify(jsonData));
+    //console.log("jsonData = " + JSON.stringify(jsonData));
     return JSON.stringify(jsonData);
 }
 
@@ -388,14 +579,34 @@ function sendDataToServer() {
     var jsonData = createJsonFromTable();
     var urlEncodedData = encodeURIComponent(jsonData);
     var url = 'http://{{IP_ADDRESS}}/tc_data_blocks_store?data=' + urlEncodedData;
-    console.log("url so save = " + url);
     var xhr = new XMLHttpRequest();
     xhr.open('GET', url, true);
-    xhr.onreadystatechange = function() {
-      if (xhr.readyState === 4 && xhr.status === 200) {
-        console.log('Data successfully sent to server!');
-      }
+    xhr.onreadystatechange = function () {
+        if (xhr.readyState === 4) {
+            var button = document.getElementById("save-button");
+            if (xhr.status === 200) {
+                button.classList.remove("pure-button-primary");
+                button.classList.add("success");
+                button.innerHTML = "Saved!";
+                setTimeout(function () {
+                    button.classList.remove("success");
+                    button.classList.add("pure-button-primary");
+                    button.innerHTML = "save";
+                }, 2000);
+                console.log('Data successfully sent to server!');
+            } else {
+                button.classList.remove("pure-button-primary");
+                button.classList.add("error");
+                button.innerHTML = "Error!";
+                setTimeout(function () {
+                    button.classList.remove("error");
+                    button.classList.add("pure-button-primary");
+                    button.innerHTML = "save";
+                }, 2000);
+                console.log('Error while sending data to server.');
+            }
+        }
     };
     xhr.send();
-  }
-  
+    loadTCGraphData(); // update the tc data graph
+}
diff --git a/firmware/html/index_template_bottom.html b/firmware/html/index_template_bottom.html
index a72b1b7..37d78fd 100644
--- a/firmware/html/index_template_bottom.html
+++ b/firmware/html/index_template_bottom.html
@@ -6,10 +6,21 @@
                 <strong>Timming control data editor</strong>
             </label>
             <br>
-            <div id="table-container">
-            </div>
+            <table>
+                <tr>
+                    <td>
+                        <div id="table-container" class="top-align">
+                        </div>
+                    </td>
+                    <td>
+                        <div id="tc_plot_chart" class="top-align">
+                        </div>
+                    </td>
+                </tr>
+            </table>
+            
             <br>
-            <a href="#" class="pure-button pure-button-primary" onclick="sendDataToServer();">save</a>
+            <a href="#" id="save-button" class="pure-button pure-button-primary" onclick="sendDataToServer();">save</a>
         </div>
     </div> <!-- end of tab-tde -->
 
diff --git a/firmware/html/index_template_middle.html b/firmware/html/index_template_middle.html
index 2b948ab..4b5e267 100644
--- a/firmware/html/index_template_middle.html
+++ b/firmware/html/index_template_middle.html
@@ -1,7 +1,7 @@
 <!-- middle -->
                     </td>
                     <td>
-                        <div id="plot_chart"></div>
+                        <div id="plot_chart" class="top-align"></div>
                     </td>
                 </tr>
             </table>
diff --git a/firmware/html/index_template_top.html b/firmware/html/index_template_top.html
index 3ac1cf8..5d4956f 100644
--- a/firmware/html/index_template_top.html
+++ b/firmware/html/index_template_top.html
@@ -47,5 +47,5 @@
             <br>
             <table border=0>
                 <tr>
-                    <td>
+                    <td class="top-align">
 
diff --git a/firmware/html/light_control_template.html b/firmware/html/light_control_template.html
index be21046..bc62ab1 100644
--- a/firmware/html/light_control_template.html
+++ b/firmware/html/light_control_template.html
@@ -7,13 +7,13 @@
                             <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>
+                            <label for="bri{{LIGHT_NUMBER_DEC}}">Target brightness</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>
+                            <label for="light{{LIGHT_NUMBER_DEC}}_pwm">Actual Bri.</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>
diff --git a/firmware/html/style.css b/firmware/html/style.css
index e39a471..9788312 100644
--- a/firmware/html/style.css
+++ b/firmware/html/style.css
@@ -40,4 +40,7 @@ cursor: pointer;
 }
 .pure-button:hover {
 background-color: #333;
+}
+.top-align {
+vertical-align: top;
 }
\ No newline at end of file
diff --git a/firmware/html/top.js b/firmware/html/top.js
index 73dd43b..bf4ddaa 100644
--- a/firmware/html/top.js
+++ b/firmware/html/top.js
@@ -4,6 +4,34 @@ links.forEach(function(link) {
         event.preventDefault();
         var xhr = new XMLHttpRequest();
         xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=true', true);
+
+        xhr.onreadystatechange = function () {
+            if (xhr.readyState === 4) {
+                var button = document.getElementById("tc_on");
+                if (xhr.status === 200) {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("success");
+                    button.innerHTML = "Enabled!";
+                    setTimeout(function () {
+                        button.classList.remove("success");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "ON";
+                    }, 2000);
+                    console.log('Data successfully sent to server!');
+                } else {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("error");
+                    button.innerHTML = "Error!";
+                    setTimeout(function () {
+                        button.classList.remove("error");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "ON";
+                    }, 2000);
+                    console.log('Error while sending data to server.');
+                }
+            }
+        };
+
         xhr.send();
         //console.log('tc=true call');
         document.getElementById('tc_on').classList.add('pure-button-primary');
@@ -16,6 +44,34 @@ links.forEach(function(link) {
         event.preventDefault();
         var xhr = new XMLHttpRequest();
         xhr.open('GET', 'http://{{IP_ADDRESS}}/?tc=false', true);
+
+        xhr.onreadystatechange = function () {
+            if (xhr.readyState === 4) {
+                var button = document.getElementById("tc_off");
+                if (xhr.status === 200) {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("success");
+                    button.innerHTML = "Disabled!";
+                    setTimeout(function () {
+                        button.classList.remove("success");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "OFF";
+                    }, 2000);
+                    console.log('Data successfully sent to server!');
+                } else {
+                    button.classList.remove("pure-button-primary");
+                    button.classList.add("error");
+                    button.innerHTML = "Error!";
+                    setTimeout(function () {
+                        button.classList.remove("error");
+                        button.classList.add("pure-button-primary");
+                        button.innerHTML = "OFF";
+                    }, 2000);
+                    console.log('Error while sending data to server.');
+                }
+            }
+        };
+
         xhr.send();
         //console.log('tc=false call');
         document.getElementById('tc_off').classList.add('pure-button-primary');
diff --git a/pic/schematics.png b/pic/schematics.png
new file mode 100644
index 0000000..f03a73b
Binary files /dev/null and b/pic/schematics.png differ