Implement browser-based voice notes recording, standby flicking remembrance candle, and favorite memory pinning

sound_picture_app/Display_PNG.cpp

@@ -71,3 +71,54 @@ void Display_Memory_Photo(int memoryIndex) {
   snprintf(path, sizeof(path), "/photos/%s", g_memories[memoryIndex].photo);
   Display_Image_From_SD(path);
 }
+
+void Draw_Candle_Body() {
+  clearScreen();
+  
+  // Draw candle body (ivory column): x from 76 to 96 (width 21), y from 175 to 250 (height 75)
+  uint16_t body[21 * 75];
+  for (int i = 0; i < 21 * 75; i++) body[i] = 0xF7BE; // Warm Ivory / light cream
+  LCD_addWindow(76, 175, 96, 249, body);
+  
+  // Draw candle wick: x = 86, y from 168 to 175
+  uint16_t wick[1 * 8];
+  for (int i = 0; i < 8; i++) wick[i] = 0x2104; // Dark gray
+  LCD_addWindow(86, 168, 86, 175, wick);
+}
+
+void Draw_Candle_Flicker() {
+  static uint32_t lastFlickerTime = 0;
+  static uint8_t flickerState = 0;
+  uint32_t now = millis();
+  if (now - lastFlickerTime < 180) return; // flicker every 180ms
+  lastFlickerTime = now;
+  flickerState = (flickerState + 1) % 4;
+
+  // Bounding box: width 31, height 43
+  static uint16_t canvas[31 * 43];
+  memset(canvas, 0, sizeof(canvas)); // fill black
+  
+  int hOffset = (flickerState % 2 == 0) ? 0 : ((flickerState == 1) ? 1 : -1);
+  int vHeight = 22 + (flickerState % 3); // flame height varies
+  
+  for (int y = 0; y < 43; y++) {
+    for (int x = 0; x < 31; x++) {
+      int dx = abs(x - 15 - hOffset);
+      int dy = 35 - y;
+      
+      if (dy >= 0 && dy < vHeight) {
+        int maxWidth = (dy < 8) ? (dy * 1.2) : (vHeight - dy) * 0.4;
+        if (maxWidth < 1) maxWidth = 1;
+        if (dx <= maxWidth) {
+          if (dx <= maxWidth / 2 && dy < vHeight - 4) {
+            canvas[y * 31 + x] = 0xFFE0; // Yellow
+          } else {
+            canvas[y * 31 + x] = 0xFD20; // Orange
+          }
+        }
+      }
+    }
+  }
+  
+  LCD_addWindow(71, 125, 101, 167, canvas);
+}

sound_picture_app/Display_PNG.h

@@ -8,5 +8,8 @@
 
 void Display_Image_From_SD(const char* fullPath);
 
-// Convenience: display the photo for a given memory index
 void Display_Memory_Photo(int memoryIndex);
+
+// Standby Remembrance Candle Flicker animation
+void Draw_Candle_Body();
+void Draw_Candle_Flicker();

sound_picture_app/SD_Card.cpp

@@ -14,6 +14,7 @@ int  g_tributeAlarmHour    = 19;
 int  g_tributeAlarmMinute  = 0;
 int  g_timezoneOffset      = 0;
 bool g_timeSynchronized    = false;
+int  g_favoriteMemoryId    = -1;
 
 // ── SD Init ───────────────────────────────────────────────────────────────────
 void SD_Init() {
@@ -87,6 +88,10 @@ bool Config_Load() {
       g_currentIndex = atoi(line + 6);
       continue;
     }
+    if (strncmp(line, "FAVORITE|", 9) == 0) {
+      g_favoriteMemoryId = atoi(line + 9);
+      continue;
+    }
     if (strncmp(line, "ALARM|", 6) == 0) {
       // Parse: ALARM|enabled|hour|minute|timezone_offset
       char* tok = strtok(line + 6, "|");
@@ -139,6 +144,7 @@ bool Config_Save() {
   }
   f.printf("VOLUME|%d\n", g_volume);
   f.printf("INDEX|%d\n",  g_currentIndex);
+  f.printf("FAVORITE|%d\n", g_favoriteMemoryId);
   f.printf("ALARM|%d|%d|%d|%d\n", g_tributeAlarmEnabled ? 1 : 0, g_tributeAlarmHour, g_tributeAlarmMinute, g_timezoneOffset);
   for (int i = 0; i < g_memoryCount; i++) {
     Memory& m = g_memories[i];

sound_picture_app/SD_Card.h

@@ -35,6 +35,7 @@ extern int  g_tributeAlarmHour;
 extern int  g_tributeAlarmMinute;
 extern int  g_timezoneOffset;
 extern bool g_timeSynchronized;
+extern int  g_favoriteMemoryId;
 
 // SD init
 void SD_Init();

sound_picture_app/Web_Server.cpp

@@ -11,6 +11,7 @@ bool uploadSuccess = false;
 String uploadedFilename = "";
 volatile int  g_webDisplayRequest = -1;
 volatile bool g_webDisplayDirty   = false;
+
 static String buildPage(const String& status, const String& file);
 
 // ── Helpers ───────────────────────────────────────────────────────────────────
@@ -150,6 +151,31 @@ h1 {
   align-items: center;
   justify-content: center;
   line-height: 1;
+  z-index: 10;
+}
+.mem-fav {
+  position: absolute;
+  top: 8px;
+  left: 8px;
+  background: rgba(0,0,0,.6);
+  border: 1px solid rgba(255,179,0,0.3);
+  color: var(--accent);
+  border-radius: 50%;
+  width: 28px;
+  height: 28px;
+  font-size: 16px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  line-height: 1;
+  z-index: 10;
+  transition: .2s;
+}
+.mem-fav.active {
+  background: rgba(255, 179, 0, 0.25);
+  border-color: var(--accent);
+  color: #fff;
 }
 .play-btn {
   width: 100%;
@@ -199,7 +225,7 @@ h1 {
 .upload-box {
   border: 2px dashed rgba(255, 179, 0, 0.3);
   border-radius: var(--radius);
-  padding: 32px;
+  padding: 24px 16px;
   text-align: center;
   cursor: pointer;
   margin-bottom: 16px;
@@ -295,13 +321,22 @@ input[type=range] { width: 100%; }
 
   <!-- Step 2: Audio (Optional Choice) -->
   <div id="step2" class="wizard-step">
-    <div class="step-label">Step 2 of 3 &mdash; Choose a Soundbite (Optional)</div>
+    <div class="step-label">Step 2 of 3 &mdash; Choose or Record a Soundbite (Optional)</div>
+    
+    <!-- Record Mic Box -->
+    <div class="upload-box" id="recordBox" onclick="toggleRecord()" style="border-color:var(--accent-orange); background:rgba(245,124,0,0.03);">
+      <div class="icon" id="recordIcon">🎙️</div>
+      <p id="recordTxt">Tap to **Record Voice Note** directly from mic</p>
+    </div>
+
+    <!-- File Select Box -->
     <div class="upload-box" id="audioBox" onclick="document.getElementById('audioFile').click()">
-      <div class="icon">🎙️</div>
+      <div class="icon">📁</div>
-      <p>Tap to attach a voice note or song<br><strong>.mp3 or .wav file</strong></p>
+      <p>Tap to upload an existing sound clip<br><strong>.mp3 or .wav file</strong></p>
     </div>
     <input type="file" id="audioFile" accept=".mp3,.wav" onchange="onAudioSelected(this)">
     <audio id="previewAudio" class="preview-audio" controls></audio>
+    
     <div id="progress2" class="progress-wrap">
       <div class="progress-bar"><div class="progress-fill" id="fill2"></div></div>
       <div class="progress-txt" id="txt2">Uploading audio...</div>
@@ -368,7 +403,7 @@ input[type=range] { width: 100%; }
     Add
   </button>
   <button id="nav-settings" onclick="goPage('settings')">
-    <svg viewBox="0 0 24 24"><path d="M19.14 12.94c.04-.3.06-.61.06-.94s-.02-.64-.07-.94l2.03-1.58c.18-.14.23-.41.12-.61l-1.92-3.32c-.12-.22-.37-.29-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54c-.04-.24-.24-.41-.48-.41h-3.84c-.24 0-.43.17-.47.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96c-.22-.08-.47 0-.59.22L2.74 8.87c-.12.21-.08.47.12.61l2.03 1.58c-.05.3-.09.63-.09.94s.02.64.07.94l-2.03 1.58c-.18.14-.23.41-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38 1.03.7 1.62.94l.36 2.54c.05.24.24.41.48.41h3.84c.24 0 .44-.17.47-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32c.12-.22.07-.47-.12-.61l-2.01-1.58zM12 15.6c-1.98 0-3.6-1.62-3.6-3.6s1.62-3.6 3.6-3.6 3.6 1.62 3.6 3.6-1.62 3.6-3.6 3.6z"/></svg>
+    <svg viewBox="0 0 24 24"><path d="M19.14 12.94c.04-.3.06-.61.06-.94s-.02-.64-.07-.94l2.03-1.58c.18-.14.23-.41.12-.61l-1.92-3.32c-.12-.22-.37-.29-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54c-.04-.24-.24-.41-.48-.41h-3.84c-.24 0-.43.17-.47.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96c-.22-.08-.47 0-.59.22L2.74 8.87c-.12.21-.08.47.12.61l2.03 1.58c-.05.3-.09.63-.09.94s.02.64.07.94l-2.03 1.58c-.18.14-.23.41-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38(1.03).7-1.62.94l.36 2.54c.05.24.24.41.48.41h3.84c.24 0 .44-.17.47-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32c.12-.22.07-.47-.12-.61l-2.01-1.58zM12 15.6c-1.98 0-3.6-1.62-3.6-3.6s1.62-3.6 3.6-3.6 3.6 1.62 3.6 3.6-1.62 3.6-3.6 3.6z"/></svg>
     Settings
   </button>
 </nav>
@@ -379,6 +414,16 @@ var memories = [];
 var uploadedPhoto = '';
 var uploadedAudio = '';
 var currentStep = 1;
+var favoriteId = -1;
+
+// Audio Recorder variables
+var mediaStream = null;
+var audioCtx = null;
+var scriptProcessor = null;
+var inputNode = null;
+var audioBuffers = [];
+var isRecording = false;
+var recordedBlob = null;
 
 // ── Navigation ──────────────────────────────────────────────────────────────
 function goPage(name) {
@@ -402,10 +447,14 @@ function openAdd() {
 
 // ── Gallery ─────────────────────────────────────────────────────────────────
 function loadGallery() {
+  // Fetch settings to know the current favoriteId first, then load memories
+  fetch('/api/settings').then(function(r){return r.json()}).then(function(sData){
+    favoriteId = sData.favoriteId !== undefined ? sData.favoriteId : -1;
     fetch('/api/memories').then(function(r){return r.json()}).then(function(data){
       memories = data;
       renderGallery();
     }).catch(function(){});
+  }).catch(function(){});
 }
 
 function renderGallery() {
@@ -423,8 +472,15 @@ function renderGallery() {
     var imgHtml = imgSrc
       ? '<img class="mem-thumb" src="'+imgSrc+'" loading="lazy" onerror="this.style.display=\'none\'">'
       : '<div class="mem-thumb no-img">🌻</div>';
+    
+    // Check if favorite
+    var isFav = (m.id === favoriteId);
+    var favClass = isFav ? 'mem-fav active' : 'mem-fav';
+    var favStar = isFav ? '★' : '☆';
+
     var html = '<div class="mem-card">'
       + imgHtml
+      + '<button class="'+favClass+'" onclick="toggleFavorite('+m.id+',event)" title="Favorite">'+favStar+'</button>'
       + '<button class="mem-del" onclick="deleteMemory('+m.id+',event)" title="Delete">&#x2715;</button>'
       + '<div class="mem-info">'
       + '<div class="mem-name">'+escHtml(m.name)+'</div>'
@@ -434,6 +490,24 @@ function renderGallery() {
   });
 }
 
+function toggleFavorite(id, e) {
+  e.stopPropagation();
+  var nextFav = (id === favoriteId) ? -1 : id;
+  fetch('/api/settings', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ favoriteId: nextFav })
+  })
+    .then(function(r){return r.json()})
+    .then(function(d){
+      if(d.ok) {
+        favoriteId = nextFav;
+        loadGallery();
+        showToastGlobal(nextFav === -1 ? 'Favorite removed.' : 'Favorite keepsake pinned! ⭐', true);
+      }
+    }).catch(function(){});
+}
+
 function playMemory(id) {
   fetch('/api/display?id='+id, {method:'POST'})
     .then(function(r){return r.json()})
@@ -450,7 +524,7 @@ function deleteMemory(id, e) {
 
 // ── Wizard ───────────────────────────────────────────────────────────────────
 function resetWizard() {
-  uploadedPhoto=''; uploadedAudio='';
+  uploadedPhoto=''; uploadedAudio=''; recordedBlob=null;
   document.getElementById('photoFile').value='';
   document.getElementById('audioFile').value='';
   document.getElementById('previewImg').style.display='none';
@@ -459,6 +533,12 @@ function resetWizard() {
   document.getElementById('toast').style.display='none';
   document.getElementById('nextStep1').disabled=true;
   document.getElementById('nextStep2').disabled=true;
+  
+  // Reset Record UI
+  isRecording = false;
+  document.getElementById('recordIcon').textContent = '🎙️';
+  document.getElementById('recordTxt').innerHTML = 'Tap to **Record Voice Note** directly from mic';
+  
   goStep(1);
 }
 
@@ -479,11 +559,123 @@ function onPhotoSelected(input) {
 
 function onAudioSelected(input) {
   if(!input.files.length) return;
+  recordedBlob = null; // Clear mic recording if file is chosen
   var f = input.files[0];
   var url = URL.createObjectURL(f);
   var aud = document.getElementById('previewAudio');
   aud.src = url; aud.style.display='block';
   document.getElementById('nextStep2').disabled=false;
+  document.getElementById('nextStep2').textContent = 'Upload Soundbite ➔';
+}
+
+// ── Audio Recording Wizardry (Record mono WAV on the fly) ───────────────────
+function toggleRecord() {
+  if (!isRecording) {
+    startRecording();
+  } else {
+    stopRecording();
+  }
+}
+
+function startRecording() {
+  navigator.mediaDevices.getUserMedia({ audio: true }).then(function(s) {
+    mediaStream = s;
+    audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+    inputNode = audioCtx.createMediaStreamSource(mediaStream);
+    scriptProcessor = audioCtx.createScriptProcessor(4096, 1, 1);
+    audioBuffers = [];
+    
+    scriptProcessor.onaudioprocess = function(e) {
+      if (!isRecording) return;
+      var chunk = new Float32Array(e.inputBuffer.getChannelData(0));
+      audioBuffers.push(chunk);
+    };
+    
+    inputNode.connect(scriptProcessor);
+    scriptProcessor.connect(audioCtx.destination);
+    isRecording = true;
+    recordedBlob = null;
+    
+    // Update UI
+    document.getElementById('recordIcon').textContent = '🔴';
+    document.getElementById('recordTxt').innerHTML = '<span style="color:#ef4444; font-weight:bold; animation:pulse 1.5s infinite">Recording...</span><br>Tap box again to STOP recording';
+  }).catch(function(err) {
+    showToast('Microphone access denied or unsupported.', false);
+  });
+}
+
+function stopRecording() {
+  if (!isRecording) return;
+  isRecording = false;
+  
+  // Stop media tracks
+  if (mediaStream) {
+    mediaStream.getTracks().forEach(function(t){ t.stop(); });
+  }
+  
+  // Disconnect web audio nodes
+  if (scriptProcessor) scriptProcessor.disconnect();
+  if (inputNode) inputNode.disconnect();
+  var sampleRate = audioCtx ? audioCtx.sampleRate : 44100;
+  if (audioCtx) audioCtx.close();
+  
+  // Flatten audio buffers
+  var totalLength = audioBuffers.reduce(function(acc, b){ return acc + b.length; }, 0);
+  var result = new Float32Array(totalLength);
+  var offset = 0;
+  for (var i = 0; i < audioBuffers.length; i++) {
+    result.set(audioBuffers[i], offset);
+    offset += audioBuffers[i].length;
+  }
+  
+  // Encode to standard 16-bit PCM WAV
+  recordedBlob = encodeWAV(result, sampleRate);
+  
+  // Preview
+  var url = URL.createObjectURL(recordedBlob);
+  var aud = document.getElementById('previewAudio');
+  aud.src = url; aud.style.display = 'block';
+  
+  // Update UI
+  document.getElementById('recordIcon').textContent = '✅';
+  document.getElementById('recordTxt').innerHTML = 'Voice Note recorded! (' + Math.round(totalLength/sampleRate) + ' sec)<br><strong>Tap to re-record</strong>';
+  
+  document.getElementById('nextStep2').disabled = false;
+  document.getElementById('nextStep2').textContent = 'Upload Recorded Voice Note ➔';
+}
+
+function encodeWAV(samples, sampleRate) {
+  var buffer = new ArrayBuffer(44 + samples.length * 2);
+  var view = new DataView(buffer);
+  
+  var writeString = function(view, offset, string) {
+    for (var i = 0; i < string.length; i++) {
+      view.setUint8(offset + i, string.charCodeAt(i));
+    }
+  };
+  
+  writeString(view, 0, 'RIFF');
+  view.setUint32(4, 36 + samples.length * 2, true);
+  writeString(view, 8, 'WAVE');
+  writeString(view, 12, 'fmt ');
+  view.setUint32(16, 16, true);
+  view.setUint16(20, 1, true); // PCM format
+  view.setUint16(22, 1, true); // Mono
+  view.setUint32(24, sampleRate, true);
+  view.setUint32(28, sampleRate * 2, true); // Byte rate
+  view.setUint16(32, 2, true); // Block align
+  view.setUint16(34, 16, true); // 16-bit
+  writeString(view, 36, 'data');
+  view.setUint32(40, samples.length * 2, true);
+  
+  // Convert floats to 16-bit PCM signed integers
+  var offset = 44;
+  for (var i = 0; i < samples.length; i++, offset += 2) {
+    var s = Math.max(-1, Math.min(1, samples[i]));
+    view.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
+  }
+  
+  return new Blob([view], { type: 'audio/wav' });
 }
 
 function uploadFile(fileInput, endpoint, progressWrap, fill, txt, onDone) {
@@ -612,19 +804,62 @@ function uploadPhoto() {
 }
 
 function uploadAudio() {
-  document.getElementById('nextStep2').disabled=true;
+  document.getElementById('nextStep2').disabled = true;
+  var progressWrap = document.getElementById('progress2');
+  var fill = document.getElementById('fill2');
+  var txt = document.getElementById('txt2');
+
+  // Check if we have a recorded blob
+  if (recordedBlob) {
+    var fd = new FormData();
+    // Unique timestamped voice note name
+    var vnName = 'voice_note_' + Math.floor(Date.now() / 1000) + '.wav';
+    fd.append('file', recordedBlob, vnName);
+
+    var xhr = new XMLHttpRequest();
+    xhr.open('POST', '/api/upload/audio');
+    progressWrap.style.display = 'block';
+    xhr.upload.onprogress = function(e){
+      if(e.lengthComputable){
+        var p = Math.round(e.loaded/e.total*100);
+        fill.style.width=p+'%';
+        txt.textContent='Uploading Voice note... '+p+'%';
+      }
+    };
+    xhr.onload = function(){
+      progressWrap.style.display = 'none';
+      try {
+        var d = JSON.parse(xhr.responseText);
+        if (d.ok && d.filename) {
+          uploadedAudio = d.filename;
+          goStep(3);
+        } else {
+          showToast('Voice note upload failed.', false);
+        }
+      } catch(e) { showToast('Voice note upload failed.', false); }
+      document.getElementById('nextStep2').disabled = false;
+    };
+    xhr.onerror = function(){
+      progressWrap.style.display = 'none';
+      showToast('Voice note upload failed.', false);
+      document.getElementById('nextStep2').disabled = false;
+    };
+    xhr.send(fd);
+  } else {
+    // Standard file upload
     uploadFile(
       document.getElementById('audioFile'),
       '/api/upload/audio',
-    document.getElementById('progress2'),
+      progressWrap,
-    document.getElementById('fill2'),
+      fill,
-    document.getElementById('txt2'),
+      txt,
       function(filename){
         if(filename){ uploadedAudio=filename; goStep(3); }
         else showToast('Audio upload failed. Try again.', false);
         document.getElementById('nextStep2').disabled=false;
       }
     );
+  }
 }
 
 function skipAudio() {
@@ -795,6 +1030,7 @@ void initWebServer() {
     j += ",\"alarmHour\":"; j += g_tributeAlarmHour;
     j += ",\"alarmMinute\":"; j += g_tributeAlarmMinute;
     j += ",\"timeSynced\":"; j += g_timeSynchronized ? "true" : "false";
+    j += ",\"favoriteId\":"; j += g_favoriteMemoryId;
     j += "}";
     server.send(200, "application/json", j);
   });
@@ -829,6 +1065,12 @@ void initWebServer() {
       g_tributeAlarmMinute = body.substring(am + 14).toInt();
     }
 
+    // Favorite Memory ID
+    int fav = body.indexOf("\"favoriteId\":");
+    if (fav >= 0) {
+      g_favoriteMemoryId = body.substring(fav + 13).toInt();
+    }
+
     Config_Save();
     server.send(200, "application/json", "{\"ok\":true}");
   });

sound_picture_app/sound_picture_app.ino

@@ -28,6 +28,11 @@ static bool     g_tributeActive    = false;
 static int      g_tributeNextIndex = 0;
 static uint32_t lastTributeCheck   = 0;
 
+// Standby Remembrance Candle State
+static bool     g_standbyActive      = false;
+static uint32_t lastInteractionTime  = 0;
+static const uint32_t STANDBY_TIMEOUT = 120000; // 2 minutes standby timeout
+
 // ── Core function: show a memory ──────────────────────────────────────────────
 void showMemory(int index) {
   if (g_memoryCount == 0) return;
@@ -36,6 +41,9 @@ void showMemory(int index) {
 
   printf("Showing memory %d: '%s'\r\n", index, g_memories[index].name);
 
+  g_standbyActive = false;
+  lastInteractionTime = millis();
+
   stopAudio();
   Display_Memory_Photo(index);
   playMemoryAudio(index);
@@ -110,13 +118,27 @@ void setup() {
   initAudioPlayer();
   setPlayerVolume(g_volume);
 
-  // Show first memory (or error screen)
+  // Show favorite memory or first memory on startup
   if (g_memoryCount == 0) {
     printf("No memories found. Add some via the web app.\r\n");
-    // Screen stays dark — user will add via web
+    g_standbyActive = true;
+    Draw_Candle_Body();
+  } else {
+    int favoriteIndex = -1;
+    if (g_favoriteMemoryId >= 0) {
+      for (int i = 0; i < g_memoryCount; i++) {
+        if (g_memories[i].id == g_favoriteMemoryId) {
+          favoriteIndex = i;
+          break;
+        }
+      }
+    }
+    if (favoriteIndex >= 0) {
+      showMemory(favoriteIndex);
     } else {
       showMemory(g_currentIndex);
     }
+  }
 
   // Start WiFi + web server
   initWebServer();
@@ -160,6 +182,8 @@ void loop() {
   // ── Button edge detection ─────────────────────────────────────────────────
   if (btn == LOW && lastButtonState == HIGH) {
     // Pressed down
+    lastInteractionTime = now;
+    g_standbyActive      = false;
     buttonPressStartTime = now;
     isButtonPressed      = true;
     longPressTriggered   = false;
@@ -210,6 +234,24 @@ void loop() {
     }
   }
 
+  // ── Standby Candle Controller ─────────────────────────────────────────────
+  if (g_memoryCount == 0) {
+    if (!g_standbyActive) {
+      g_standbyActive = true;
+      Draw_Candle_Body();
+    }
+  } else if (!g_standbyActive && !isAudioPlaying() && currentState == STATE_IDLE && !g_tributeActive) {
+    if (now - lastInteractionTime > STANDBY_TIMEOUT) {
+      g_standbyActive = true;
+      Draw_Candle_Body();
+      printf("Standby: entering candle standby mode\r\n");
+    }
+  }
+
+  if (g_standbyActive) {
+    Draw_Candle_Flicker();
+  }
+
   lastButtonState = btn;
 
   // ── Web server ────────────────────────────────────────────────────────────