From 382486000ce7e1b4b69b50d7cb67dd99a4453dd7 Mon Sep 17 00:00:00 2001
From: Kai Lauterbach <klaute@gmx.de>
Date: Mon, 1 May 2023 11:18:15 +0200
Subject: [PATCH] Replaced html page generation by cleaner version.

---
 firmware/config.h                |   1 -
 firmware/data/config.html        |  62 ++++
 firmware/data/index.html         | 275 ++++++++++++++++
 firmware/data/light_control.html |  29 ++
 firmware/firmware.ino            | 537 ++++++-------------------------
 5 files changed, 463 insertions(+), 441 deletions(-)
 create mode 100644 firmware/data/config.html
 create mode 100644 firmware/data/index.html
 create mode 100644 firmware/data/light_control.html

diff --git a/firmware/config.h b/firmware/config.h
index 3fcbb02..a667301 100644
--- a/firmware/config.h
+++ b/firmware/config.h
@@ -21,4 +21,3 @@
 
 #define MY_NTP_SERVER "de.pool.ntp.org"
 
-//#define DISABLE_WEB_CONTROL
diff --git a/firmware/data/config.html b/firmware/data/config.html
new file mode 100644
index 0000000..ac695cd
--- /dev/null
+++ b/firmware/data/config.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_IP}}">
+            </div>
+            <div class="pure-control-group">
+                <label for="gwip">Gateway IP</label>
+                <input id="gwip" name="gwip" type="text" value="{{WIFI_GW}}">
+            </div>
+            <div class="pure-control-group">
+                <label for="ip">Netmask</label>
+                <input id="netmask" name="netmas" type="text" value="{{WIFI_NM}}">
+            </div>
+            <div class="pure-control-group">
+                <label for="ip">DNS</label>
+                <input id="netmask" name="dns" type="text" value="{{WIFI_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.html b/firmware/data/index.html
new file mode 100644
index 0000000..ad26aa0
--- /dev/null
+++ b/firmware/data/index.html
@@ -0,0 +1,275 @@
+<!doctype html>
+<html>
+<head>
+    <style></style>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Light Setup</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}}
+            <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_NUM}}; 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${i - 1}_off`);
+                        briSlider.value = data.bri;
+                        briSliderVal.innerHTML = (Math.round((data.bri * 100.0 / 255.0) * 100) / 100).toFixed(2);
+                        console.log('data.on ' + i + ' = ' + data.on);
+                        if (data.on == true) {
+                            onLinkOn.classList.add('pure-button-primary');
+                            onLinkOff.classList.remove('pure-button-primary');
+                        } else {
+                            onLinkOn.classList.remove('pure-button-primary');
+                            onLinkOff.classList.add('pure-button-primary');
+                        }
+                    }).catch(error => console.error(error));
+                }
+            }
+            setInterval(updateLightState, 10000);
+            updateLightState();
+
+            function updatePWMValues() {
+                console.log('----> setting pwm data <----');
+                for (let i = 0; i < {{LIGHT_NUM}}; i++) {
+                    const lightID = i + 1;
+                    const pwmElement = document.getElementById(`light${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/light_control.html b/firmware/data/light_control.html
new file mode 100644
index 0000000..87bd448
--- /dev/null
+++ b/firmware/data/light_control.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/firmware.ino b/firmware/firmware.ino
index 626ac45..eff2f60 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -5,6 +5,7 @@
 #include <WiFiManager.h>
 #include <ArduinoJson.h>
 #include <EEPROM.h>
+#include "FS.h"
 
 #include "config.h"
 
@@ -323,7 +324,6 @@ void handleNotFound()
 void init_webserver()
 {
 
-#ifndef DISABLE_WEB_CONTROL
   server.on("/state", HTTP_PUT, []()
   {  // HTTP PUT request used to set a new light state
     DynamicJsonDocument root(1024);
@@ -427,13 +427,9 @@ void init_webserver()
     server.send(200, "application/json", output);
   });
 
-#endif  // DISABLE_WEB_CONTROL
-
   server.on("/", []()
   {
 
-#ifndef DISABLE_WEB_CONTROL
-
     if (server.hasArg("transition"))
     {
       default_transitiontime = server.arg("transition").toFloat();
@@ -468,7 +464,6 @@ void init_webserver()
         Serial.println(EEPROM.read(EEPROM_LAST_STATE_STARTUP_ADDRESS));
       }
     }
-#endif  // DISABLE_WEB_CONTROL
 
     // timing controller switch handling
     if (server.hasArg("tc"))
@@ -510,8 +505,6 @@ void init_webserver()
       }
     }
 
-#ifndef DISABLE_WEB_CONTROL
-
     // scene switch handling
     if (server.hasArg("scene")) {
       scene = server.arg("scene").toInt();
@@ -602,8 +595,6 @@ void init_webserver()
 
     }  // process all lights
 
-#endif  // DISABLE_WEB_CONTROL
-
     if (server.hasArg("resettc")) {  // reqrite the tc config and reboot
       tc_write_default();
       ESP.reset();
@@ -614,465 +605,131 @@ void init_webserver()
     }
 
     // Generate HTML page
-    String http_content = "<!doctype html>";
-    http_content += "<html>";
-    http_content += "<head>";
-    http_content += "<style></style>";
-    http_content += "<meta charset=\"utf-8\">";
-    http_content += "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">";
-    //http_content += "<meta http-equiv=\"refresh\" content=\"15\">";  // Reload the page every 15 seconds automatically
-    http_content += "<title>Light Setup</title>";
-    http_content += "<script src=\"https://code.jquery.com/jquery-3.6.0.min.js\"></script>";
-    http_content += "<script src=\"https://cdn.plot.ly/plotly-latest.min.js\"></script>";
-    http_content += "<script src=\"https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js\"></script>";
-    http_content += "<link rel=\"stylesheet\" href=\"https://unpkg.com/purecss@0.6.2/build/pure-min.css\">";
-    http_content += "</head>";
-    http_content += "<body>";
-    http_content += "<fieldset>";
-    http_content += "<h3>" + (String)light_name + "</h3>";
+    String http_content =  "123";
+    // HTML-Datei öffnen und Inhalt in eine Zeichenfolge speichern
+    File file = SPIFFS.open("/index.html", "r");
+    http_content = file.readString();
+    file.close();
 
-    http_content += "<div class=\"pure-form pure-form-aligned\">";
+    http_content.replace("{{LIGHT_NAME}}", (String)light_name);
 
-    http_content += "<div class=\"pure-controls\">";
-    http_content += "<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>";
-    http_content += "<label for=\"cb\" class=\"pure-checkbox\">";
-    http_content += "</label>";
-    http_content += "</div>";
-
-    // timing control button
-    http_content += "<br>";
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"tc_on\"><strong>Timing control</strong></label>";
     int tc_val = EEPROM.read(EEPROM_TIMING_CONTROL_ENABLED_ADDRESS);
-    http_content += "<a id=\"tc_on\" class=\"pure-button";
-    if (tc_val == TIMING_CONTROL_ENABLED) http_content += "  pure-button-primary";
-    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=\"#\">OFF</a>";
-    http_content += "</div>";
-    http_content += "<script>"
-                    // 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();"
-                    "console.log('tc=true call');"
-                    "document.getElementById('tc_on').classList.add('pure-button-primary');"
-                    "document.getElementById('tc_off').classList.remove('pure-button-primary');"
-                    "});"
-                    "});"
-                    // 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();"
-                    "console.log('tc=false call');"
-                    "document.getElementById('tc_off').classList.add('pure-button-primary');"
-                    "document.getElementById('tc_on').classList.remove('pure-button-primary');"
-                    "});"
-                    "});"
-                    "</script>";
-    http_content += "<br>";
+    if (tc_val == TIMING_CONTROL_ENABLED)
+    {
+      http_content.replace("{{TC_LINK_PRIMARY_ON]]", "pure-button-primary");
+    } else {
+      http_content.replace("{{TC_LINK_PRIMARY_ON]]", "");
+    }
+    if (tc_val == TIMING_CONTROL_DISABLED)
+    {
+      http_content.replace("{{TC_LINK_PRIMARY_OFF]]", "pure-button-primary");
+    } else {
+      http_content.replace("{{TC_LINK_PRIMARY_OFF]]", "");
+    }
 
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"transition\">Transition time (s)</label>";
-    http_content += "<input id=\"transition\" name=\"transition\" type=\"text\" placeholder=\"10\" value=\"" + (String)default_transitiontime + "\">";
-    http_content += "</div>";
-    http_content += "<br>";
+    http_content.replace("{{TRANSITION_TIME}}", (String)default_transitiontime);
 
-    http_content += "<script>"
-                    "let timeoutId;" // slider value change submit to server
-                    "function sendSliderValue(x) {"
-                    "x = x - 1;"
-                    "clearTimeout(timeoutId);"
-                    "timeoutId = setTimeout(() => {"
-                    "var value = document.getElementById(`bri${x}`).value;"
-                    "var url = `http://192.168.0.26/?bri${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>";
+    // Generate lights part of the HTML page
+    String light_content =  "";
+    // HTML-Datei öffnen und Inhalt in eine Zeichenfolge speichern
+    File file2 = SPIFFS.open("/light_control.html", "r");
+    light_content = file2.readString();
+    file2.close();
 
-#ifndef DISABLE_WEB_CONTROL
-    http_content += "<br><table border=0><tr><td>";
     // Light control
     for (uint8 light_num = 0; light_num < LIGHTS_COUNT; light_num++)
     {
-      // on/off buttons
-      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\" 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 += "<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-Value</label>";
-      http_content += "<input type=\"range\" min=\"0\" max=\"100\" value=\"0\" id=\"light" + (String)light_num + "_pwm\" disabled>";
-      http_content += "&nbsp;<span id=\"light" + (String)light_num + "_pwm_txt\"></span>%";
-      http_content += "<script>";
-      http_content += "var slider" + (String)light_num + " = document.getElementById(\"bri" + (String)light_num + "\");";
-      http_content += "var output" + (String)light_num + " = document.getElementById(\"bri" + (String)light_num + "\_val\");";
-      http_content += "output" + (String)light_num + ".innerHTML = (Math.round((slider" + (String)light_num + ".value * 100.0 / 255.0) * 100) / 100).toFixed(2);";
-      http_content += "slider" + (String)light_num + ".oninput = function() {";
-      http_content += "output" + (String)light_num + ".innerHTML = (Math.round((this.value * 100.0 / 255.0) * 100) / 100).toFixed(2);";
-      http_content += "}";
-      http_content += "</script>";
-
-      http_content += "</div>";
-
+      // on/off buttons and slider
+      light_content.replace("{{LIGHT_NUMBER}}", (String)(light_num + 1));
+      light_content.replace("{{LIGHT_NUMBER_DEC}}", (String)light_num);
     }
-    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();"
-                    "});"
-                    "});"
-                    "</script>";
 
-    http_content += "<form class=\"pure-form pure-form-aligned\" action=\"/\" method=\"post\">";
+    // add the lights code to the html output string
+    http_content.replace("{{LIGHTS_CONTROL}}", light_content);
 
-    // startup state and scene for all of the lights
-    http_content += "</td><td>";
-    http_content += "<div id=\"plot_chart\"></div>";
-    http_content += "</td></tr></table><br>";
-    http_content += "<h3>Config</h3>";
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"startup\"><strong>Startup</strong></label>";
-    http_content += "<select onchange=\"this.form.submit()\" id=\"startup\" name=\"startup\">";
     int ls_val = EEPROM.read(EEPROM_LAST_STATE_STARTUP_ADDRESS);
-    http_content += "<option ";
-    if (ls_val == LAST_STATE_STARTUP_LIGHT_LAST_STATE) http_content += "selected=\"selected\"";
-    http_content += " value=\"0\">Last state</option>";
-    http_content += "<option ";
-    if (ls_val == LAST_STATE_STARTUP_LIGHT_ON_STATE) http_content += "selected=\"selected\"";
-    http_content += " value=\"1\">On</option>";
-    http_content += "<option ";
-    if (ls_val == LAST_STATE_STARTUP_LIGHT_OFF_STATE) http_content += "selected=\"selected\"";
-    http_content += " value=\"2\">Off</option>";
-    http_content += "</select>";
-    http_content += "</div>";
+    if (ls_val == LAST_STATE_STARTUP_LIGHT_LAST_STATE)
+    {
+      http_content.replace("{{STARTUP_SELECTED_LS_0}}", "selected=\"selected\"");
+    } else {
+      http_content.replace("{{STARTUP_SELECTED_LS_0}}", "");
+    }
+
+    if (ls_val == LAST_STATE_STARTUP_LIGHT_ON_STATE)
+    {
+      http_content.replace("{{STARTUP_SELECTED_ON_1}}", "selected=\"selected\"");
+    } else {
+      http_content.replace("{{STARTUP_SELECTED_ON_1}}", "");
+    }
+
+    if (ls_val == LAST_STATE_STARTUP_LIGHT_OFF_STATE)
+    {
+      http_content.replace("{{STARTUP_SELECTED_OFF_2}}", "selected=\"selected\"");
+    } else {
+      http_content.replace("{{STARTUP_SELECTED_OFF_2}}", "");
+    }
 
     // scene
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"scene\"><strong>Scene</strong></label>";
-    http_content += "<select onchange = \"this.form.submit()\" id=\"scene\" name=\"scene\">";
     int sc_val = EEPROM.read(EEPROM_SCENE_ADDRESS);
-    http_content += "<option ";
-    if (sc_val == SCENE_RELEAX) http_content += "selected=\"selected\"";
-    http_content += " value=\"0\">Relax</option>";
-    http_content += "<option ";
-    if (sc_val == SCENE_BRIGHT) http_content += "selected=\"selected\"";
-    http_content += " value=\"1\">Bright</option>";
-    http_content += "<option ";
-    if (sc_val == SCENE_NIGHTLY) http_content += "selected=\"selected\"";
-    http_content += " value=\"2\">Night</option>";
-    http_content += "</select>";
-    http_content += "</div>";
+    if (sc_val == SCENE_RELEAX)
+    {
+      http_content.replace("SCENE_SELECTED_RELAX_0", "selected=\"selected\"");
+    } else {
+      http_content.replace("SCENE_SELECTED_RELAX_0", "");
+    }
+    if (sc_val == SCENE_BRIGHT)
+    {
+      http_content.replace("SCENE_SELECTED_BRIGHT_1", "selected=\"selected\"");
+    } else {
+      http_content.replace("SCENE_SELECTED_BRIGHT_1", "");
+    }
+    if (sc_val == SCENE_NIGHTLY)
+    {
+      http_content.replace("SCENE_SELECTED_NIGHT_2", "selected=\"selected\"");
+    } else {
+      http_content.replace("SCENE_SELECTED_NIGHT_2", "");
+    }
+
+    // Generate lights part of the HTML page
+    String config_content =  "";
+    // HTML-Datei öffnen und Inhalt in eine Zeichenfolge speichern
+    File file3 = SPIFFS.open("/config.html", "r");
+    config_content = file3.readString();
+    file3.close();
 
     // Wifi settings
-    http_content += "<br>";
-    http_content += "<h3>Wifi</h3>";
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"ip\">SSID</label>";
-    http_content += "<input id=\"ssid\" name=\"ssid\" type=\"text\" value=\"" + WiFi.SSID() + "\">";
-    http_content += "</div>";
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"wpw\">Passphrase</label>";
-    http_content += "<input id=\"wpw\" name=\"wpw\" type=\"text\" placeholder=\"1234password\">";
-    http_content += "</div>";
+    config_content.replace("{{WIFI_SSIF}}", WiFi.SSID());
 
     // Network settings
     uint8_t dip = EEPROM.read(EEPROM_DYNAMIC_IP_ADDRESS);
-    http_content += "<br>";
-    http_content += "<h3>Network</h3>";
-    http_content += "<div class=\"pure-control-group\">";
-    http_content += "<label for=\"dip\"><strong>Dynamic-IP</strong></label>";
-    http_content += "<a class=\"pure-button";
-    if (dip) http_content += " pure-button-primary";
-    http_content += "\" href=\"/?dip=true\">ON</a>";
-    http_content += "<a class=\"pure-button";
-    if (!dip) http_content += " pure-button-primary";
-    http_content += "\" href=\"/?dip=false\">OFF</a>";
-    http_content += "</div>";
-
-    // ip config
-    if (dip == 0) {
-      http_content += "<div class=\"pure-control-group\">";
-      http_content += "<label for=\"ip\">IP</label>";
-      http_content += "<input id=\"ip\" name=\"ip\" type=\"text\" value=\"" + WiFi.localIP().toString() + "\">";
-      http_content += "</div>";
-      http_content += "<div class=\"pure-control-group\">";
-      http_content += "<label for=\"gwip\">Gateway IP</label>";
-      http_content += "<input id=\"gwip\" name=\"gwip\" type=\"text\" value=\"" + WiFi.gatewayIP().toString() + "\">";
-      http_content += "</div>";
-      http_content += "<div class=\"pure-control-group\">";
-      http_content += "<label for=\"ip\">Netmask</label>";
-      http_content += "<input id=\"netmask\" name=\"netmas\" type=\"text\" value=\"" + WiFi.subnetMask().toString() + "\">";
-      http_content += "</div>";
+    if (dip)
+    {
+      config_content.replace("{{DIP_LINK_ON_PRIMARY}}", "pure-button-primary");
+      config_content.replace("{{DIP_LINK_OFF_PRIMARY}}", "");
+    } else {
+      config_content.replace("{{DIP_LINK_OFF_PRIMARY}}", "pure-button-primary");
+      config_content.replace("{{DIP_LINK_ON_PRIMARY}}", "");
     }
 
-    // The save button
-    http_content += "<div class=\"pure-controls\">";
-    http_content += "<button type=\"submit\" class=\"pure-button pure-button-primary\">Save</button>";
-    http_content += "</div>";
+    // ip config
+    if (dip == 0)
+    {
+      config_content.replace("{{WIFI_IP}}", WiFi.localIP().toString());
+      config_content.replace("{{WIFI_GW}}", WiFi.gatewayIP().toString());
+      config_content.replace("{{WIFI_NM}}", WiFi.subnetMask().toString());
+      config_content.replace("{{WIFI_DNS}}", WiFi.dnsIP().toString());
+    }
 
-    http_content += "<script>"
-                    "function loadData() {" // load tc data and generate graph
-                    "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);"
+    http_content.replace("{{CONFIG_PAGE}}", config_content);
 
-                    // index suche für die vertikale linie
-                    "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}`;"
-                    //"console.log(dateString);" // 2023-04-28
-
-                    "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);"
-
-                    // TODO in array dynamisch erzeugt umschreiben
-                    "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);" // TODO array der traces dynamisch erzeugen
-                    "});"
-                    "}"
-                    "setInterval(loadData, 10000);"
-                    "loadData();"
-
-                    "function updateLightState() {" // load the light data from server and set on state and brightness
-                    "console.log('----> setting bri and power switch <----');"
-                    "for (let i = 1; i <= 4; i++) {"
-                    "const lightURL = `http://192.168.0.26/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) {"
-                    //"console.log('true');"
-                    "onLinkOn.classList.add('pure-button-primary');"
-                    "onLinkOff.classList.remove('pure-button-primary');"
-                    "} else {"
-                    //"console.log('false');"
-                    "onLinkOn.classList.remove('pure-button-primary');"
-                    "onLinkOff.classList.add('pure-button-primary');"
-                    "}"
-                    "})"
-                    ".catch(error => console.error(error));"
-                    "}"
-                    "}"
-                    "setInterval(updateLightState, 10000);"
-                    "updateLightState();"
-
-                    // show pwm values in webinterface
-                    "function updatePWMValues() {"
-                    "console.log('----> setting pwm data <----');"
-                    "for (let i = 0; i < " + (String)LIGHTS_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://192.168.0.26/state?light=${lightID}`;"
-                    "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 + " * 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;"
-                    "pwmElementTxt.innerText = pwmValue.toString();"
-                    "})"
-                    ".catch(error => console.error(error));"
-                    "}"
-                    "}"
-                    "}"
-                    "updatePWMValues();"
-                    "setInterval(updatePWMValues, 5000);"
-                    "</script>";
-
-#endif  // DISABLE_WEB_CONTROL
-
-    http_content += "</form>";
-    http_content += "</div>";
-    http_content += "</fieldset>";
-    http_content += "</body>";
-    http_content += "</html>";
+    http_content.replace("{{PWM_MIN}}", (String)PWM_MIN);
+    http_content.replace("{{PWM_MAX}}", (String)PWM_MAX);
 
     server.send(200, "text/html", http_content);
   });
 
-  server.on("/reset", []() {  // trigger manual reset
+  server.on("/reset", []()
+  {  // trigger manual reset
     server.send(200, "text/html", "reset");
     delay(1000);
     ESP.restart();