diff --git a/data/app.js b/data/app.js
index 121baec..9c6e587 100644
--- a/data/app.js
+++ b/data/app.js
@@ -18,6 +18,34 @@ function connectWS() {
           powerBar.value = pct;
           powerBarValue.textContent = pct + '%';
         }
+
+        // Mettre à jour l'état des boutons selon le mode (manuel/auto)
+        if (typeof data.auto !== 'undefined' || typeof data.manual !== 'undefined') {
+          try {
+            updateButton(btnPreheat, !!data.manual);
+            updateButton(btnProfil, !!data.auto);
+          } catch (e) {
+            // ignore si les boutons ne sont pas encore disponibles
+          }
+        }
+
+        // Si mode automatique, appliquer la classe 'active' sur la row correspondante
+        if (typeof data.step !== 'undefined') {
+          const mapping = {0: 'row-preheat', 1: 'row-soak', 2: 'row-reflow'};
+          // Retirer la classe active de toutes
+          Object.values(mapping).forEach(id => {
+            const el = document.getElementById(id);
+            if (el) el.classList.remove('active');
+          });
+          // Si auto activé, ajouter la classe sur la step active
+          if (data.auto) {
+            const target = mapping[data.step];
+            if (target) {
+              const el = document.getElementById(target);
+              if (el) el.classList.add('active');
+            }
+          }
+        }
       } catch {
         if (tempDiv) tempDiv.textContent = e.data;
       }
@@ -26,6 +54,47 @@ function connectWS() {
 
 connectWS();
 
+// Récupérer l'état initial depuis le serveur (après reload de la page)
+function refreshState() {
+  fetch('/state').then(r => {
+    if (!r.ok) throw new Error('no state');
+    return r.json();
+  }).then(data => {
+    const btnPreheatEl = document.getElementById('validateChauffeManuelle');
+    const btnProfilEl = document.getElementById('validateChauffeAuto');
+    if (btnPreheatEl) updateButton(btnPreheatEl, !!data.manual);
+    if (btnProfilEl) updateButton(btnProfilEl, !!data.auto);
+    const powerBar = document.getElementById('power-bar');
+    const powerBarValue = document.getElementById('power-bar-value');
+    if (powerBar && typeof data.power !== 'undefined') {
+      let pct = Math.max(0, Math.min(100, Math.round(data.power)));
+      powerBar.value = pct;
+      if (powerBarValue) powerBarValue.textContent = pct + '%';
+    }
+    // Ajuster la jauge de préchauffage sur la valeur de setpoint si présente
+    const gauge = document.getElementById('preheat-gauge');
+    const gaugeValue = document.getElementById('preheat-gauge-value');
+    if (gauge && gaugeValue && typeof data.setpoint !== 'undefined') {
+      gauge.value = Math.round(data.setpoint);
+      gaugeValue.textContent = gauge.value + '°C';
+    }
+
+    // Gérer la classe 'active' sur les lignes (si mode auto)
+    const mapping = {0: 'row-preheat', 1: 'row-soak', 2: 'row-reflow'};
+    Object.values(mapping).forEach(id => {
+      const el = document.getElementById(id);
+      if (el) el.classList.remove('active');
+    });
+    if (data.auto && typeof data.step !== 'undefined') {
+      const target = mapping[data.step];
+      if (target) {
+        const el = document.getElementById(target);
+        if (el) el.classList.add('active');
+      }
+    }
+  }).catch(err => console.log('refreshState failed', err));
+}
+
 // Fonction utilitaire pour modifier l'aspect d'un bouton
 function updateButton(btn, isActive) {
   if (isActive) {
@@ -37,9 +106,8 @@ function updateButton(btn, isActive) {
   }
 }
 
-// Initialisation : aucun mode actif
-updateButton(btnPreheat, false);
-updateButton(btnProfil, false);
+// L'état initial est chargé depuis le serveur
+
 
 btnPreheat.onclick = function() {
   if (btnPreheat.className === 'stop') {
@@ -124,4 +192,6 @@ document.addEventListener('DOMContentLoaded', () => {
       }
     };
   }
+  // Après que le DOM est prêt, récupérer et appliquer l'état initial
+  refreshState();
 });
diff --git a/data/index.html b/data/index.html
index c61c680..55b43ca 100644
--- a/data/index.html
+++ b/data/index.html
@@ -26,17 +26,17 @@
       </div>
       <div class="phase" id="chauffe-auto">
         <h4>Chauffe automatique : <span id="auto-time"></span></h4>
-        <div class="row active">
+        <div class="row" id="row-preheat">
           <label style="width: 65px; display: inline-block;">Preheat : </label>
           <input type="number" id="preheat-temp" value="150" min="0" max="300">°C
           <input type="number" id="preheat-time" value="180" min="1" max="600">s
         </div>
-        <div class="row">
+        <div class="row" id="row-soak">
           <label style="width: 65px; display: inline-block;">Soak :</label>
           <input type="number" id="soak-temp" value="180" min="0" max="300">°C
           <input type="number" id="soak-time" value="120" min="1" max="600">s
         </div>
-        <div class="row">
+        <div class="row" id="row-reflow">
           <label style="width: 65px; display: inline-block;">Reflow : </label>
           <input type="number" id="reflow-temp" value="230" min="0" max="300">°C
           <input type="number" id="reflow-time" value="60" min="1" max="600">s
diff --git a/src/main.cpp b/src/main.cpp
index eebcfcd..5878373 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,6 +28,7 @@ int preheatTemp = 0, preheatTime = 0;
 int soakTemp = 0, soakTime = 0;
 int reflowTemp = 0, reflowTime = 0;
 bool autoProfileActive = false;
+bool manualPreheatActive = false;
 unsigned long profileStartTime = 0;
 int profileStep = 0;
 
@@ -134,6 +135,7 @@ void setup() {
   server.on("/action/stop", HTTP_POST, [](AsyncWebServerRequest *request){
     setpoint = 0;
     autoProfileActive = false;
+    manualPreheatActive = false;
     profileStep = 0;
     Serial.println("Arrêt demandé : setpoint PID à 0°C");
     request->send(200, "text/plain", "OK");
@@ -152,6 +154,7 @@ void setup() {
       Serial.println("Mode automatique désactivé (chauffe manuelle)");
     }
     setpoint = request->arg("temp").toDouble();
+    manualPreheatActive = true;
     Serial.printf("Chauffe manuelle demandée : %.1f°C (setpoint PID fixé)\n", setpoint);
     request->send(200, "text/plain", "OK");
   });
@@ -172,6 +175,7 @@ void setup() {
     reflowTime = request->arg("reflowTime").toInt();
     // Démarrage du profil automatique
     autoProfileActive = true;
+    manualPreheatActive = false;
     profileStep = 0;
     profileStartTime = millis();
     setpoint = preheatTemp;
@@ -180,6 +184,32 @@ void setup() {
     request->send(200, "text/plain", "OK");
   });
 
+  // Endpoint pour renvoyer l'état actuel (utile pour réactualiser l'UI après reload)
+  server.on("/state", HTTP_GET, [](AsyncWebServerRequest *request){
+    int pct = 0;
+    if (output > 0) {
+      pct = (int)round((output * 100) / PWM_PERIOD);
+      if (pct > 100) pct = 100;
+      if (pct < 0) pct = 0;
+    }
+    int preheatProgress = 0;
+    if (autoProfileActive && profileStep == 0 && preheatTime > 0) {
+      unsigned long elapsed = (millis() - profileStartTime) / 1000;
+      unsigned long prog = (elapsed * 100UL) / (unsigned long)preheatTime;
+      if (prog > 100) prog = 100;
+      preheatProgress = (int)prog;
+    }
+    String json = String("{")
+      + "\"manual\":" + (manualPreheatActive ? "true" : "false")
+      + ",\"auto\":" + (autoProfileActive ? "true" : "false")
+      + ",\"power\":" + String(pct)
+      + ",\"setpoint\":" + String(setpoint, 1)
+      + ",\"preheatProgress\":" + String(preheatProgress)
+      + ",\"step\":" + String(profileStep)
+      + "}";
+    request->send(200, "application/json", json);
+  });
+
   // Connexion WiFi ou démarrage AP si ssid/pwd vides
   if (strlen(ssid) == 0 || strlen(password) == 0) {
     Serial.println("SSID ou mot de passe vide, démarrage en mode AP");
@@ -299,6 +329,7 @@ void loop() {
       if (elapsed >= (unsigned long)reflowTime) {
         profileStep = 3;
         autoProfileActive = false;
+        setpoint = 0; // Reflow terminé -> couper la chauffe
         Serial.println("Profil terminé");
       }
     }
@@ -328,7 +359,13 @@ void loop() {
       pct = (int)round((output * 100) / PWM_PERIOD);
       if (pct > 100) pct = 100;
     }
-    String json = String("{\"temp\":") + String(input, 1) + ",\"setpoint\":" + String(setpoint, 1) + ",\"output\":" + String(pct) + "}";
+    String json = String("{\"temp\":") + String(input, 1)
+      + ",\"setpoint\":" + String(setpoint, 1)
+      + ",\"output\":" + String(pct)
+      + ",\"manual\":" + (manualPreheatActive ? "true" : "false")
+      + ",\"auto\":" + (autoProfileActive ? "true" : "false")
+      + ",\"step\":" + String(profileStep)
+      + "}";
     Serial.println("Température: " + String(input, 1) + " °C | Setpoint: " + String(setpoint, 1) + " | Output PID: " + String(output) + " | Puissance: " + String(pct) + "%");
     ws.textAll(json);
   }