diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 8c71b2f..16b1f16 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -9,8 +9,11 @@
 #include "config.h"
 
 //********* Config block *********//
+// blue, warmwhite, purple, white&red&green
+// blau, schwarz, rot, weiß
 // ch1, ch2, ch3, ch4
-uint8_t pins[LIGHTS_COUNT] = { 14, 12, 15, 13 };
+// D1, D2, D7, D5
+uint8_t pins[LIGHTS_COUNT] = { 5, 4, 13, 14 };
 
 IPAddress strip_ip(192, 168, 0, 26);   // choose an unique IP Adress
 IPAddress gateway_ip(192, 168, 0, 1);  // Router IP
@@ -660,15 +663,13 @@ void init_webserver()
       http_content += "<h4>Light " + (String)(light_num + 1) + "</h4>";
       http_content += "<div class=\"pure-control-group\">";
       http_content += "<label for=\"power\"><strong>Power</strong></label>";
-      http_content += "<a id=\"on" + (String)light_num + "_on\" class=\"pure-button";
-      http_content += "\" href=\"/?on" + (String)light_num + "=true\">ON</a>";
-      http_content += "<a id=\"on" + (String)light_num + "_off\" class=\"pure-button";
-      http_content += "\" href=\"/?on" + (String)light_num + "=false\">OFF</a>";
+      http_content += "<a id=\"on" + (String)light_num + "_on\" class=\"pure-button\" href=\"#\">ON</a>";
+      http_content += "<a id=\"on" + (String)light_num + "_off\" class=\"pure-button\" href=\"#\">OFF</a>";
       http_content += "</div>";
 
       // slider for brightness
       http_content += "<div class=\"pure-control-group\">";
-      http_content += "<label for=\"bri\"" + (String)light_num + ">Bri</label>";
+      http_content += "<label for=\"bri" + (String)light_num + "\">Bri</label>";
       http_content += "<input id=\"bri" + (String)light_num + "\" onchange=\"sendSliderValue(" + (String)(light_num+1) + ")\" name=\"bri" + (String)light_num + "\" type=\"range\" min=\"0\" max=\"255\" value=\"" + (String)bri[light_num] + "\">";
       http_content += "&nbsp;<span id=\"bri" + (String)light_num + "_val\" name=\"bri" + (String)light_num + "\">" + (String)(int)(bri[light_num] * 100.0 / 255.0) + "</span>%";
       http_content += "<br><label for=\"light" + (String)light_num + "_pwm\">PWM-Wert</label>";
@@ -686,6 +687,73 @@ void init_webserver()
       http_content += "</div>";
 
     }
+    http_content += "<script>"
+                    // Suche nach allen Links auf der Seite mit IDs von on0_off bis on3_off
+                    "var links = document.querySelectorAll('[id^=\"on\"][id$=\"_off\"]');"
+                    // Füge einen Klick-Listener zu jedem Link hinzu
+                    "links.forEach(function(link) {"
+                    "link.addEventListener('click', function(event) {"
+                    // Verhindere, dass der Link die Seite neu lädt
+                    "event.preventDefault();"
+                    // Extrahiere die Zahl aus der ID des Links
+                    "var id = this.id.replace('on', '').replace('_off', '');"
+                    // Erstelle eine neue Anfrage an die entsprechende URL
+                    "var xhr = new XMLHttpRequest();"
+                    "xhr.open('GET', 'http://192.168.0.26/?on' + id + '=false', true);"
+                    // Sende die Anfrage im Hintergrund
+                    "xhr.send();"
+                    "updateLightState();"
+                    "});"
+                    "});"
+                    // Suche nach allen Links auf der Seite mit IDs von on0_off bis on3_off
+                    "var links = document.querySelectorAll('[id^=\"on\"][id$=\"_on\"]');"
+                    // Füge einen Klick-Listener zu jedem Link hinzu
+                    "links.forEach(function(link) {"
+                    "link.addEventListener('click', function(event) {"
+                    // Verhindere, dass der Link die Seite neu lädt
+                    "event.preventDefault();"
+                    // Extrahiere die Zahl aus der ID des Links
+                    "var id = this.id.replace('on', '').replace('_on', '');"
+                    // Erstelle eine neue Anfrage an die entsprechende URL
+                    "var xhr = new XMLHttpRequest();"
+                    "xhr.open('GET', 'http://192.168.0.26/?on' + id + '=true', true);"
+                    // Sende die Anfrage im Hintergrund
+                    "xhr.send();"
+                    "updateLightState();"
+                    "});"
+                    "});"
+
+                    // Suche nach allen tc Links auf der Seite mit IDs tc_on
+                    "var links = document.querySelectorAll('[id^=\"tc_on\"]');"
+                    // Füge einen Klick-Listener zu jedem Link hinzu
+                    "links.forEach(function(link) {"
+                    "link.addEventListener('click', function(event) {"
+                    // Verhindere, dass der Link die Seite neu lädt
+                    "event.preventDefault();"
+                    // Erstelle eine neue Anfrage an die entsprechende URL
+                    "var xhr = new XMLHttpRequest();"
+                    "xhr.open('GET', 'http://192.168.0.26/?tc=true', true);"
+                    // Sende die Anfrage im Hintergrund
+                    "xhr.send();"
+                    "updateLightState();"
+                    "});"
+                    "});"
+                    // Suche nach allen tc Links auf der Seite mit IDs tc_off
+                    "var links = document.querySelectorAll('[id^=\"tc_off\"]');"
+                    // Füge einen Klick-Listener zu jedem Link hinzu
+                    "links.forEach(function(link) {"
+                    "link.addEventListener('click', function(event) {"
+                    // Verhindere, dass der Link die Seite neu lädt
+                    "event.preventDefault();"
+                    // Erstelle eine neue Anfrage an die entsprechende URL
+                    "var xhr = new XMLHttpRequest();"
+                    "xhr.open('GET', 'http://192.168.0.26/?tc=false', true);"
+                    // Sende die Anfrage im Hintergrund
+                    "xhr.send();"
+                    "updateLightState();"
+                    "});"
+                    "});"
+                    "</script>";
 
     // startup state and scene for all of the lights
     http_content += "</td><td>";
@@ -729,12 +797,12 @@ void init_webserver()
     http_content += "<div class=\"pure-control-group\">";
     http_content += "<label for=\"tc\"><strong>Timing control</strong></label>";
     int tc_val = EEPROM.read(EEPROM_TIMING_CONTROL_ENABLED_ADDRESS);
-    http_content += "<a class=\"pure-button";
+    http_content += "<a id=\"tc_on\" class=\"pure-button";
     if (tc_val == TIMING_CONTROL_ENABLED) http_content += "  pure-button-primary";
-    http_content += "\" href=\"/?tc=true\">ON</a>";
-    http_content += "<a class=\"pure-button";
+    http_content += "\" href=\"#\">ON</a>";
+    http_content += "<a id=\"tc_off\" class=\"pure-button";
     if (tc_val == TIMING_CONTROL_DISABLED) http_content += "  pure-button-primary";
-    http_content += "\" href=\"/?tc=false\">OFF</a>";
+    http_content += "\" href=\"#\">OFF</a>";
     http_content += "</div>";
     http_content += "<br>";
 
@@ -966,7 +1034,7 @@ void init_webserver()
                     "fetch(url)"
                     ".then(response => response.json())"
                     ".then(data => {"
-                    "const pwmValue = ((Math.round((data.curpwm - ((data.curpwm >= " + (String)PWM_MIN+ ") ? " + (String)PWM_MIN + " : 0)) / " + (String)PWM_MAX + " * 100.0) * 100.0) / 100.0).toFixed(2);" // pwm as % PWM_MIN to PWM_MAX
+                    "const pwmValue = ((Math.round((data.curpwm - ((data.curpwm >= " + (String)PWM_MIN+ ") ? " + (String)PWM_MIN + " : 0)) / " + (String)PWM_MAX + " * 10000) / 100).toFixed(2));"// pwm as % PWM_MIN to PWM_MAX
                     "console.log('curpwm[' + i + '] = ' + data.curpwm + ' = ' + pwmValue);"
                     "pwmElement.innerText = pwmValue.toString();"
                     "pwmElement.value = pwmValue;"
diff --git a/firmware/timing_control.ino b/firmware/timing_control.ino
index eaaadd6..cadb2af 100644
--- a/firmware/timing_control.ino
+++ b/firmware/timing_control.ino
@@ -214,19 +214,19 @@ void tc_update_main()
   bri[3] = tc_data[target_data_block].ch4;
   if (tc_data[target_data_block-1].ch1 != current_bri[0])
   {
-    current_bri[0] = tc_data[target_data_block-1].ch1;
+    current_bri[0] = tc_data[target_data_block-1].ch1 + ((tc_data[target_data_block].ch1 == 0) ? 1 : -1);
   }
   if (tc_data[target_data_block-1].ch2 != current_bri[1])
   {
-    current_bri[1] = tc_data[target_data_block-1].ch2;
+    current_bri[1] = tc_data[target_data_block-1].ch2 + ((tc_data[target_data_block].ch2 == 0) ? 1 : -1);
   }
   if (tc_data[target_data_block-1].ch3 != current_bri[2])
   {
-    current_bri[2] = tc_data[target_data_block-1].ch3;
+    current_bri[2] = tc_data[target_data_block-1].ch3 + ((tc_data[target_data_block].ch3 == 0) ? 1 : -1);
   }
   if (tc_data[target_data_block-1].ch4 != current_bri[3])
   {
-    current_bri[3] = tc_data[target_data_block-1].ch4;
+    current_bri[3] = tc_data[target_data_block-1].ch4 + ((tc_data[target_data_block].ch4 == 0) ? 1 : -1);
   }
 
   for (uint8_t i = 0; i < LIGHTS_COUNT; i++)