ESP Compilation weirdness fixed

- Set platform version to espressif32@^6.10.0 for all environments
- Add applyWifiTxPower function to adjust TX power for ESP32-C3
- Implement handleNotFound function for improved HTTP 404 handling

.vscode/extensions.json

@@ -1,7 +1,7 @@
 {
-    // See http://go.microsoft.com/fwlink/?LinkId=827846
-    // for the documentation about the extensions.json format
     "recommendations": [
+        "Jason2866.esp-decoder",
+        "pioarduino.pioarduino-ide",
         "platformio.platformio-ide"
     ],
     "unwantedRecommendations": [

card.txt

@@ -0,0 +1,77 @@
+========================================================
+  M1730 ANALOG PANEL METER CONTROLLER — INSTRUCTION CARD
+========================================================
+(Meters and current-limiting resistors are already installed.)
+
+FIRST-TIME WI-FI SETUP
+  - Power on the device (USB or 5V supply).
+  - On your phone/laptop, join the Wi-Fi network named "M1730".
+  - A setup page opens automatically (captive portal).
+  - Pick your Wi-Fi network, enter its password.
+  - Optionally set a Device hostname (default: m1730).
+  - Tap Save. The device joins your network and restarts.
+
+OPENING THE CONFIG PAGE
+  - Browse to  http://m1730.local  (or your chosen hostname).
+  - If .local doesn't resolve, use the IP address shown on the
+    serial monitor at boot: http://<IP>
+  - The Info panel at the top shows the current hostname and IP.
+
+CONFIGURING A METER
+  - Use the "Meters" dropdown to set how many meters (1-10).
+  - For each meter (shown as tabs when more than one):
+      * Pin      - GPIO pin the meter is wired to (already set)
+      * Name     - label shown in the UI and Home Assistant
+      * Unit     - optional (e.g. W, A, °C)
+      * Min/Max  - the meter's real-world range (e.g. 0-50 A)
+      * Max Duty - calibration for full-scale deflection (%)
+      * Output   - live slider, moves the needle right away
+  - Tap Save to store all settings (survives reboots).
+
+CALIBRATING FULL SCALE (Max Duty)
+  - Drag the Output slider to 100%.
+  - Slowly raise "Max Duty" until the needle just reaches the
+    end of the scale. Don't overshoot. Tap Save.
+
+MOVING THE NEEDLE
+  - Web UI: drag a meter's Output slider (0-100%).
+  - Values sent over MQTT/Home Assistant use the real Min-Max
+    range (e.g. send 25 to a 0-50 meter = half scale).
+
+HTTP CONTROL (DIRECT URL)
+  - Move a needle from a browser or script with a GET request:
+        http://m1730.local/set?i=<meter>&v=<value>
+      * i = meter index, starting at 0 (first meter = 0)
+      * v = value 0-100 (percent of full scale)
+  - Example: http://m1730.local/set?i=0&v=75  -> meter 0 to 75%.
+  - Applies instantly, saves it, and publishes to MQTT.
+  - Returns 200 OK on success, 400 on bad input.
+
+HOME ASSISTANT (MQTT)
+  - Open the MQTT section on the config page.
+  - Enable, then enter Broker host, Port (1883), User, Pass,
+    and Prefix (default: m1730). Tap Save.
+  - Each meter shows up automatically in Home Assistant as a
+    Number entity, grouped under one device (the hostname).
+
+SECURITY (OPTIONAL PASSWORD)
+  - In the Security section, turn on "Require password" and set
+    a password. Username is always: admin
+  - Leave the password field blank to keep the existing one.
+
+RESTART
+  - "Reset Device" button = simple reboot (keeps all settings).
+
+FACTORY RESET (if locked out or misconfigured)
+  - Power-cycle (or press EN) 5 times quickly, within a few
+    seconds each, before boot completes.
+      * 5x  = clears settings BUT keeps meter pins + calibration
+      * 10x = clears everything, including saved Wi-Fi
+  - All meters sweep 0 -> full -> 0 to confirm the reset.
+  - After a 10x reset, redo "First-time Wi-Fi setup" above.
+
+TIPS
+  - Settings are saved on the device and survive power loss.
+  - If the meter reads zero unexpectedly, check the Pin number
+    and that Max Duty is greater than 0.
+========================================================

card_de.txt

@@ -0,0 +1,84 @@
+========================================================
+  M1730 ANALOG-ZEIGERINSTRUMENT-STEUERUNG — KURZANLEITUNG
+========================================================
+(Messwerke und Vorwiderstände sind bereits eingebaut.)
+
+ERSTE WLAN-EINRICHTUNG
+  - Gerät einschalten (USB oder 5-V-Netzteil).
+  - Am Handy/Laptop das WLAN mit dem Namen "M1730" auswählen.
+  - Die Einrichtungsseite öffnet sich automatisch (Captive Portal).
+  - Eigenes WLAN auswählen und dessen Passwort eingeben.
+  - Optional einen Gerätenamen (Hostname) festlegen (Standard: m1730).
+  - Auf Speichern tippen. Das Gerät verbindet sich und startet neu.
+
+KONFIGURATIONSSEITE ÖFFNEN
+  - Im Browser aufrufen:  http://m1730.local  (oder den gewählten
+    Hostnamen).
+  - Falls .local nicht auflöst, die beim Start im seriellen Monitor
+    angezeigte IP-Adresse verwenden: http://<IP>
+  - Das Info-Feld oben zeigt aktuellen Hostnamen und IP-Adresse.
+
+MESSWERK KONFIGURIEREN
+  - Über das Auswahlfeld "Meters" die Anzahl der Messwerke
+    festlegen (1-10).
+  - Für jedes Messwerk (als Reiter dargestellt, wenn mehr als eins):
+      * Pin      - GPIO-Pin, an dem das Messwerk hängt (bereits gesetzt)
+      * Name     - Bezeichnung in der Oberfläche und in Home Assistant
+      * Unit     - optional (z. B. W, A, °C)
+      * Min/Max  - realer Messbereich (z. B. 0-50 A)
+      * Max Duty - Kalibrierung für den Vollausschlag (%)
+      * Output   - Live-Schieberegler, bewegt den Zeiger sofort
+  - Auf Speichern tippen, um alle Einstellungen zu sichern
+    (bleiben nach Neustart erhalten).
+
+VOLLAUSSCHLAG KALIBRIEREN (Max Duty)
+  - Den Output-Schieberegler auf 100 % ziehen.
+  - "Max Duty" langsam erhöhen, bis der Zeiger gerade das Ende
+    der Skala erreicht. Nicht überschreiten. Speichern.
+
+ZEIGER BEWEGEN
+  - Weboberfläche: den Output-Schieberegler ziehen (0-100 %).
+  - Über MQTT/Home Assistant gesendete Werte verwenden den realen
+    Min-Max-Bereich (z. B. 25 an ein 0-50-Messwerk = halber
+    Ausschlag).
+
+HTTP-STEUERUNG (DIREKTE URL)
+  - Einen Zeiger per GET-Anfrage aus Browser oder Skript bewegen:
+        http://m1730.local/set?i=<messwerk>&v=<wert>
+      * i = Index des Messwerks, beginnend bei 0 (erstes = 0)
+      * v = Wert 0-100 (Prozent des Vollausschlags)
+  - Beispiel: http://m1730.local/set?i=0&v=75  -> Messwerk 0 auf 75 %.
+  - Wirkt sofort, wird gespeichert und an MQTT veröffentlicht.
+  - Antwort: 200 OK bei Erfolg, 400 bei ungültiger Eingabe.
+
+HOME ASSISTANT (MQTT)
+  - Auf der Konfigurationsseite den Abschnitt MQTT öffnen.
+  - Aktivieren, dann Broker-Host, Port (1883), Benutzer, Passwort
+    und Präfix (Standard: m1730) eingeben. Speichern.
+  - Jedes Messwerk erscheint automatisch in Home Assistant als
+    Number-Entität, gruppiert unter einem Gerät (dem Hostnamen).
+
+SICHERHEIT (OPTIONALES PASSWORT)
+  - Im Abschnitt Security "Require password" aktivieren und ein
+    Passwort setzen. Der Benutzername ist immer: admin
+  - Das Passwortfeld leer lassen, um das bestehende beizubehalten.
+
+NEUSTART
+  - Schaltfläche "Reset Device" = einfacher Neustart (alle
+    Einstellungen bleiben erhalten).
+
+WERKSRESET (bei Aussperrung oder Fehlkonfiguration)
+  - Gerät 5-mal schnell aus- und einschalten (oder EN drücken),
+    jeweils innerhalb weniger Sekunden, bevor der Start abgeschlossen ist.
+      * 5x  = löscht Einstellungen, BEHÄLT aber Pins + Kalibrierung
+      * 10x = löscht alles, einschließlich gespeichertem WLAN
+  - Alle Messwerke fahren 0 -> Voll -> 0 zur Bestätigung des Resets.
+  - Nach einem 10x-Reset die "ERSTE WLAN-EINRICHTUNG" oben
+    erneut durchführen.
+
+HINWEISE
+  - Einstellungen werden im Gerät gespeichert und überstehen
+    einen Stromausfall.
+  - Zeigt ein Messwerk unerwartet null an, den Pin prüfen und
+    sicherstellen, dass Max Duty größer als 0 ist.
+========================================================

card_fr.txt

@@ -0,0 +1,90 @@
+========================================================
+  CONTRÔLEUR DE GALVANOMÈTRE ANALOGIQUE M1730 — GUIDE RAPIDE
+========================================================
+(Les galvanomètres et résistances série sont déjà installés.)
+
+PREMIÈRE CONFIGURATION WI-FI
+  - Mettre l'appareil sous tension (USB ou alimentation 5 V).
+  - Sur votre téléphone/ordinateur, rejoindre le réseau Wi-Fi
+    nommé « M1730 ».
+  - La page de configuration s'ouvre automatiquement (portail captif).
+  - Choisir votre réseau Wi-Fi et saisir son mot de passe.
+  - Éventuellement définir un nom d'hôte (Hostname) (défaut : m1730).
+  - Appuyer sur Save. L'appareil rejoint le réseau et redémarre.
+
+OUVRIR LA PAGE DE CONFIGURATION
+  - Dans le navigateur, aller à :  http://m1730.local
+    (ou le nom d'hôte choisi).
+  - Si .local ne fonctionne pas, utiliser l'adresse IP affichée
+    au démarrage dans le moniteur série : http://<IP>
+  - Le panneau Info en haut indique le nom d'hôte et l'adresse IP.
+
+CONFIGURER UN GALVANOMÈTRE
+  - Utiliser le menu déroulant « Meters » pour définir le nombre
+    de galvanomètres (1-10).
+  - Pour chaque galvanomètre (affiché en onglets s'il y en a
+    plusieurs) :
+      * Pin      - broche GPIO câblée au galvanomètre (déjà définie)
+      * Name     - libellé affiché dans l'interface et Home Assistant
+      * Unit     - facultatif (p. ex. W, A, °C)
+      * Min/Max  - plage réelle de mesure (p. ex. 0-50 A)
+      * Max Duty - calibrage pour la déviation pleine échelle (%)
+      * Output   - curseur en direct, déplace l'aiguille aussitôt
+  - Appuyer sur Save pour enregistrer tous les réglages
+    (conservés après redémarrage).
+
+CALIBRER LA PLEINE ÉCHELLE (Max Duty)
+  - Amener le curseur Output à 100 %.
+  - Augmenter lentement « Max Duty » jusqu'à ce que l'aiguille
+    atteigne juste le bout de l'échelle. Ne pas dépasser. Save.
+
+DÉPLACER L'AIGUILLE
+  - Interface web : faire glisser le curseur Output (0-100 %).
+  - Les valeurs envoyées via MQTT/Home Assistant utilisent la
+    plage réelle Min-Max (p. ex. envoyer 25 à un galvanomètre
+    0-50 = mi-échelle).
+
+CONTRÔLE HTTP (URL DIRECTE)
+  - Déplacer une aiguille via une requête GET depuis un
+    navigateur ou un script :
+        http://m1730.local/set?i=<galvanometre>&v=<valeur>
+      * i = index du galvanomètre, à partir de 0 (le premier = 0)
+      * v = valeur 0-100 (pourcentage de la pleine échelle)
+  - Exemple : http://m1730.local/set?i=0&v=75 -> galvanomètre 0 à 75 %.
+  - Effet immédiat, enregistré et publié sur MQTT.
+  - Réponse : 200 OK en cas de succès, 400 si l'entrée est invalide.
+
+HOME ASSISTANT (MQTT)
+  - Ouvrir la section MQTT sur la page de configuration.
+  - Activer, puis saisir l'hôte du Broker, le Port (1883),
+    l'utilisateur, le mot de passe et le préfixe (défaut : m1730).
+    Save.
+  - Chaque galvanomètre apparaît automatiquement dans Home
+    Assistant comme entité Number, regroupée sous un seul
+    appareil (le nom d'hôte).
+
+SÉCURITÉ (MOT DE PASSE FACULTATIF)
+  - Dans la section Security, activer « Require password » et
+    définir un mot de passe. Le nom d'utilisateur est toujours : admin
+  - Laisser le champ mot de passe vide pour conserver l'actuel.
+
+REDÉMARRAGE
+  - Bouton « Reset Device » = simple redémarrage (tous les
+    réglages sont conservés).
+
+RÉINITIALISATION D'USINE (si verrouillé ou mal configuré)
+  - Éteindre/rallumer (ou appuyer sur EN) 5 fois rapidement,
+    à quelques secondes d'intervalle, avant la fin du démarrage.
+      * 5x  = efface les réglages MAIS conserve broches + calibrage
+      * 10x = efface tout, y compris le Wi-Fi enregistré
+  - Tous les galvanomètres balaient 0 -> plein -> 0 pour
+    confirmer la réinitialisation.
+  - Après une réinitialisation 10x, refaire la « PREMIÈRE
+    CONFIGURATION WI-FI » ci-dessus.
+
+CONSEILS
+  - Les réglages sont enregistrés dans l'appareil et survivent
+    à une coupure de courant.
+  - Si un galvanomètre indique zéro de façon inattendue, vérifier
+    le numéro de Pin et que Max Duty est supérieur à 0.
+========================================================

platformio.ini

@@ -8,12 +8,43 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env:esp32-s3-devkitc-1]
+[common]
-platform = espressif32
+; All ESP32 targets use the pioarduino fork, which ships Arduino-ESP32 3.x
-board = esp32-s3-devkitc-1
+; (the registry espressif32 platform is still on 2.0.17 and lacks C6 support).
+platform_esp32 = https://github.com/pioarduino/platform-espressif32/releases/download/55.03.39/platform-espressif32.zip
+
+[env]
 framework = arduino
 monitor_speed = 115200
 lib_deps =
     tzapu/WiFiManager@^2.0.17
-    bblanchon/ArduinoJson@^7.0.0
+    bblanchon/ArduinoJson@^7.4.3
     knolleary/PubSubClient@^2.8
+
+[env:esp32-s3-devkitc-1]
+platform = ${common.platform_esp32}
+board = esp32-s3-devkitc-1
+board_build.filesystem = littlefs
+
+[env:esp32dev]
+platform = ${common.platform_esp32}
+board = esp32dev
+board_build.filesystem = littlefs
+
+[env:esp32-C3-devkitm-1]
+platform = ${common.platform_esp32}
+board = esp32-c3-devkitm-1
+board_build.filesystem = littlefs
+
+[env:esp32-c6-devkitc-1]
+platform = ${common.platform_esp32}
+board = esp32-c6-devkitc-1
+board_build.filesystem = littlefs
+
+[env:rpipico2w]
+; RP2350 support requires the maxgerhardt fork of the raspberrypi platform
+; and the earlephilhower arduino-pico core.
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = rpipico2w
+board_build.core = earlephilhower
+board_build.filesystem_size = 0.5m

src/main.cpp

@@ -41,12 +41,12 @@ struct AuthConfig {
   char pass[32] = "";
 };
 
-static char hostname[32] = HOSTNAME_DEFAULT;
+static char hostname[64] = HOSTNAME_DEFAULT;
 static int meterCount = 0;
 static MeterConfig meters[MAX_METERS] = {};
 static MqttConfig mqttCfg;
 static AuthConfig authCfg;
-static WiFiManagerParameter hostnameParam("hostname", "Device hostname", hostname, 32);
+static WiFiManagerParameter hostnameParam("hostname", "Device hostname", hostname, 63);
 static WebServer server(80);
 static WiFiClient wifiClient;
 static PubSubClient mqttClient(wifiClient);
@@ -152,7 +152,7 @@ static void attachMeters() {
 
     // Release the channel if it's no longer used or its pin changed.
     if (attachedPin[i] != -1 && attachedPin[i] != pin) {
-      ledcDetachPin(attachedPin[i]);
+      ledcDetach(attachedPin[i]);
       pinMode(attachedPin[i], OUTPUT);
       digitalWrite(attachedPin[i], LOW);  // drive freed pin low so the meter reads zero
       Serial.printf("[PWM] detach ch%d pin%d\n", i, attachedPin[i]);
@@ -160,8 +160,7 @@ static void attachMeters() {
     }
 
     if (pin > 0 && attachedPin[i] != pin) {
-      ledcSetup(i, PWM_FREQ, PWM_RES);
+      ledcAttach(pin, PWM_FREQ, PWM_RES);
-      ledcAttachPin(pin, i);
       attachedPin[i] = pin;
       Serial.printf("[PWM] attach ch%d pin%d\n", i, pin);
     }
@@ -173,7 +172,7 @@ static void applyMeters() {
     if (meters[i].pin <= 0 || meters[i].maxDuty <= 0) continue;
     float pct = meters[i].currentValue / 100.0f * meters[i].maxDuty / 100.0f;
     int duty = constrain((int)(pct * 1023), 0, 1023);
-    ledcWrite(i, duty);
+    ledcWrite(meters[i].pin, duty);
     Serial.printf("[PWM] ch%d duty=%d (cur=%.1f maxD=%.1f)\n", i, duty, meters[i].currentValue, meters[i].maxDuty);
   }
 }
@@ -222,7 +221,7 @@ static void mqttCallback(char* topic, byte* payload, unsigned int len) {
     meters[idx].currentValue = physicalToPct(val, idx);
     if (meters[idx].pin > 0 && meters[idx].maxDuty > 0) {
       float pct = meters[idx].currentValue / 100.0f * meters[idx].maxDuty / 100.0f;
-      ledcWrite(idx, constrain((int)(pct * 1023), 0, 1023));
+      ledcWrite(meters[idx].pin, constrain((int)(pct * 1023), 0, 1023));
     }
     mqttPublishCurrent(idx);
   }
@@ -382,6 +381,15 @@ static void startMDNS() {
   }
 }
 
+static void applyWifiTxPower() {
+#if defined(CONFIG_IDF_TARGET_ESP32C3)
+  WiFi.setTxPower(WIFI_POWER_MINUS_1dBm);
+  Serial.println("[WIFI] ESP32-C3 detected, lowering TX power for stability");
+#else
+  Serial.println("[WIFI] using default TX power");
+#endif
+}
+
 // ---------------------------------------------------------------------------
 // Web helpers
 // ---------------------------------------------------------------------------
@@ -413,10 +421,34 @@ static bool requireAuth() {
 // Web handlers
 // ---------------------------------------------------------------------------
 
+static void handleLogo() {
+  File f = LittleFS.open("/logo.png", "r");
+  if (!f) { server.send(404, "text/plain", "Not found"); return; }
+  server.streamFile(f, "image/png");
+  f.close();
+}
+
+static void handleReset() {
+  if (!requireAuth()) { Serial.println("[HTTP] POST /reset -> 401"); return; }
+  Serial.println("[HTTP] POST /reset -> restarting");
+  server.send(200, "text/plain", "Restarting...");
+  delay(200);
+  ESP.restart();
+}
+
 static void handleRoot() {
   if (!requireAuth()) { Serial.println("[HTTP] GET / -> 401"); return; }
   Serial.println("[HTTP] GET /");
   String meterRows;
+  bool useTabs = meterCount > 1;
+  if (useTabs) {
+    meterRows += "<div class=tabs><div class=tab-nav>";
+    for (int i = 0; i < meterCount; i++) {
+      String label = strlen(meters[i].name) > 0 ? escHtml(meters[i].name) : "Meter " + String(i);
+      meterRows += "<button type=button class=tab-btn" + String(i == 0 ? " active" : "") + " data-tab=" + String(i) + ">" + label + "</button>";
+    }
+    meterRows += "</div>";
+  }
   for (int i = 0; i < meterCount; i++) {
     char maxStr[8], curStr[8];
     dtostrf(meters[i].maxDuty, 1, 1, maxStr);
@@ -428,7 +460,9 @@ static void handleRoot() {
     dtostrf(meters[i].rangeMin, 1, 1, rMinStr);
     dtostrf(meters[i].rangeMax, 1, 1, rMaxStr);
 
-    meterRows += "<fieldset><legend>Meter " + String(i) + "</legend>";
+    if (useTabs) meterRows += "<div class=tab-panel" + String(i == 0 ? " active" : "") + " data-tab=" + String(i) + ">";
+    meterRows += "<fieldset>";
+    if (!useTabs) meterRows += "<legend>Meter " + String(i) + "</legend>";
     meterRows += "<div class=row><label>Pin</label><input name=m" + String(i) + "_pin type=number min=0 max=99 value=" + String(meters[i].pin) + "></div>";
     meterRows += "<div class=row><label>Name</label><input name=m" + String(i) + "_name value='" + nameVal + "'></div>";
     meterRows += "<div class=row><label>Unit</label><input name=m" + String(i) + "_unit value='" + unitVal + "'></div>";
@@ -440,7 +474,9 @@ static void handleRoot() {
     meterRows += "<input name=m" + String(i) + "_cur type=range min=0 max=100 step=0.1 value=" + String(curStr) + ">";
     meterRows += "<span class=val id=m" + String(i) + ">" + String(curStr) + "%</span>";
     meterRows += "</div></fieldset>";
+    if (useTabs) meterRows += "</div>";
   }
+  if (useTabs) meterRows += "</div>";
 
   String countOpts;
   for (int i = 1; i <= MAX_METERS; i++) {
@@ -458,6 +494,7 @@ static void handleRoot() {
       "<fieldset><legend>Security</legend>"
       "<div class=row>"
         "<label class=tgl-lbl>Require password</label>"
+        "<span>(username: admin)</span>"
         "<label class=switch><input type=checkbox name=auth_en" + checked + "><span class=slid></span></label>"
       "</div>"
       "<div class=row><label>Password</label><input name=auth_pass type=password placeholder='" + String(passHint) + "'></div>";
@@ -498,7 +535,8 @@ static void handleRoot() {
   html += "*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}";
   html += "body{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Oxygen,Ubuntu,sans-serif;background:#f2f4f8;color:#1a1a2e;display:flex;justify-content:center;align-items:flex-start;min-height:100vh;padding:24px 16px}";
   html += ".card{background:#fff;border-radius:12px;box-shadow:0 4px 24px rgba(0,0,0,.08);padding:32px;width:100%;max-width:560px}";
-  html += "h1{font-size:24px;margin-bottom:4px}.sub{color:#666;font-size:14px;margin-bottom:24px}";
+  html += ".hdr{display:flex;align-items:center;gap:16px;margin-bottom:24px}.hdr img{width:72px;height:72px;flex-shrink:0}";
+  html += "h1{font-size:24px;margin-bottom:4px}.sub{color:#666;font-size:14px}";
   html += ".info{background:#f8f9fc;border-radius:8px;padding:12px 16px;margin-bottom:20px;font-size:14px}";
   html += ".info div{display:flex;justify-content:space-between;padding:4px 0}.info div span:first-child{color:#666}";
   html += "label{display:block;font-size:14px;font-weight:600;margin-bottom:4px}";
@@ -515,13 +553,17 @@ static void handleRoot() {
   html += ".count-row{display:flex;gap:12px;align-items:flex-end;margin-bottom:20px}.count-row > div{flex:1}";
   html += ".count-row label{margin-bottom:4px}";
   html += ".btn{width:100%;margin-top:8px;padding:12px;background:#4361ee;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s}";
-  html += ".btn:hover{background:#3651d4}.mac{font-size:12px;color:#999;text-align:center;margin-top:20px}";
+  html += ".btn:hover{background:#3651d4}.btn-danger{background:#dc2626}.btn-danger:hover{background:#b91c1c}.mac{font-size:12px;color:#999;text-align:center;margin-top:20px}";
 html += ".tgl-lbl{margin-bottom:0!important;line-height:18px}.switch{position:relative;display:inline-block;width:32px;height:18px;margin-left:auto;flex-shrink:0}fieldset .row label.switch{width:32px}";
 html += ".switch input{opacity:0;width:0;height:0}.slid{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background:#ccc;border-radius:18px;transition:.3s}";
 html += ".slid::before{content:\"\";position:absolute;height:14px;width:14px;left:2px;top:2px;background:#fff;border-radius:50%;transition:.3s;box-shadow:0 1px 3px rgba(0,0,0,.2)}";
-html += ".switch input:checked+.slid{background:#4361ee}.switch input:checked+.slid::before{transform:translateX(14px)}";
+  html += ".switch input:checked+.slid{background:#4361ee}.switch input:checked+.slid::before{transform:translateX(14px)}";
+  html += ".tab-nav{display:flex;gap:4px;margin-bottom:16px;flex-wrap:wrap}";
+  html += ".tab-btn{padding:8px 16px;border:1px solid #d1d5db;background:#f8f9fc;border-radius:8px 8px 0 0;cursor:pointer;font-size:13px;font-weight:600;color:#666;transition:all .2s;font-family:inherit}";
+  html += ".tab-btn:hover{background:#e8eaf0}.tab-btn.active{background:#fff;border-color:#4361ee;color:#4361ee;border-bottom-color:#fff}";
+  html += ".tab-panel{display:none}.tab-panel.active{display:block}";
   html += "</style></head><body><div class=card>";
-  html += "<h1>M1730</h1><div class=sub>Configuration</div><div class=info>";
+  html += "<div class=hdr><img src=/logo.png alt=logo><div><h1>M1730</h1><div class=sub>Configuration</div></div></div><div class=info>";
   html += "<div><span>Hostname</span><span>" + String(hostname) + "</span></div>";
   html += "<div><span>IP</span><span>" + WiFi.localIP().toString() + "</span></div></div>";
   html += "<form action=/config method=post><label>Hostname</label>";
@@ -532,6 +574,8 @@ html += ".switch input:checked+.slid{background:#4361ee}.switch input:checked+.s
   html += authSection;
   html += mqttSection;
   html += "<button class=btn type=submit>Save</button></form>";
+  html += "<form action=/reset method=post style=margin-top:8px>";
+  html += "<button class='btn btn-danger' type=submit>Reset Device</button></form>";
   html += "<div class=mac>" + WiFi.macAddress() + "</div></div>";
   html += "<script>";
   html += "Array.from(document.querySelectorAll('input[type=range]')).forEach(function(s){";
@@ -542,14 +586,35 @@ html += ".switch input:checked+.slid{background:#4361ee}.switch input:checked+.s
   html += "x.open('GET','/set?i='+this.name.match(/\\d+/)[0]+'&v='+this.value,true);x.send();";
   html += "});}});";
   html += "document.querySelector('select[name=meter_count]').addEventListener('change',function(){this.form.submit();});";
+  if (meterCount > 1) {
+    html += "document.querySelectorAll('.tab-btn').forEach(function(b){b.addEventListener('click',function(){var t=this.dataset.tab;document.querySelectorAll('.tab-btn').forEach(function(x){x.classList.remove('active')});document.querySelectorAll('.tab-panel').forEach(function(x){x.classList.remove('active')});this.classList.add('active');document.querySelector('.tab-panel[data-tab=\"'+t+'\"]').classList.add('active')})});";
+  }
   html += "</script></body></html>";
   server.send(200, "text/html", html);
   Serial.printf("[HTTP] GET / -> 200 (%u bytes)\n", html.length());
 }
 
+static void handleNotFound() {
+  String uri = server.uri();
+  if (uri == "/favicon.ico" || uri == "/favicon.png" || uri == "/robots.txt" ||
+      uri == "/generate_204" || uri == "/hotspot-detect.html" ||
+      uri == "/connecttest.txt" || uri == "/redirect") {
+    server.sendHeader("Location", "/");
+    server.send(302);
+    return;
+  }
+
+  Serial.printf("[HTTP] 404 %s\n", uri.c_str());
+  server.send(404, "text/plain", "Not found");
+}
+
 static void handleConfig() {
   if (!requireAuth()) { Serial.println("[HTTP] POST /config -> 401"); return; }
   Serial.println("[HTTP] POST /config");
+
+  char oldHostname[64];
+  strlcpy(oldHostname, hostname, sizeof(oldHostname));
+
   if (server.hasArg("hostname")) {
     String val = server.arg("hostname");
     val.trim();
@@ -557,6 +622,8 @@ static void handleConfig() {
       val.toCharArray(hostname, sizeof(hostname));
   }
 
+  bool hostnameChanged = strcmp(hostname, oldHostname) != 0;
+
   // Persist the connection fields regardless of the enable checkbox so edits
   // made while disabling MQTT aren't discarded.
   if (server.hasArg("mqtt_host"))
@@ -623,6 +690,12 @@ static void handleConfig() {
 
   server.sendHeader("Location", "/", true);
   server.send(303);
+
+  if (hostnameChanged) {
+    Serial.printf("[HTTP] hostname changed %s -> %s, restarting\n", oldHostname, hostname);
+    delay(200);
+    ESP.restart();
+  }
 }
 
 static void handleSet() {
@@ -635,7 +708,7 @@ static void handleSet() {
   if (meters[idx].pin > 0 && meters[idx].maxDuty > 0) {
     float pct = val / 100.0f * meters[idx].maxDuty / 100.0f;
     int duty = constrain((int)(pct * 1023), 0, 1023);
-    ledcWrite(idx, duty);
+    ledcWrite(meters[idx].pin, duty);
   }
   mqttPublishCurrent(idx);
   server.send(200);
@@ -643,19 +716,24 @@ static void handleSet() {
 
 static void startServer() {
   server.on("/", handleRoot);
+  server.on("/logo.png", handleLogo);
   server.on("/config", HTTP_POST, handleConfig);
+  server.on("/reset", HTTP_POST, handleReset);
   server.on("/set", handleSet);
+  server.onNotFound(handleNotFound);
   server.begin();
   Serial.println("HTTP server started");
 }
 
 // ---------------------------------------------------------------------------
-// Factory reset (rapid reset 5× within a few seconds)
+// Factory reset (5x = config only, 10x = config + WiFi credentials)
 // ---------------------------------------------------------------------------
 
-static void factoryReset() {
+static void factoryReset(bool clearWifi) {
-  Serial.println("[BOOT] factory reset triggered!");
+  Serial.printf("[BOOT] factory reset triggered (clearWifi=%d)!\n", clearWifi);
 
+  // Preserve pin assignments and calibration across a config-only reset so
+  // the physical wiring doesn't need to be re-entered after every reset.
   int count = meterCount;
   int pins[MAX_METERS];
   float maxD[MAX_METERS];
@@ -664,9 +742,9 @@ static void factoryReset() {
     maxD[i] = meters[i].maxDuty;
   }
 
-  // Reset hostname, auth, MQTT, meter metadata
+  // Reset hostname, auth, MQTT, and meter metadata
   strlcpy(hostname, HOSTNAME_DEFAULT, sizeof(hostname));
-  hostnameParam.setValue(hostname, strlen(hostname));
+  hostnameParam.setValue(hostname, sizeof(hostname) - 1);
 
   authCfg.enabled = false;
   authCfg.pass[0] = '\0';
@@ -688,23 +766,31 @@ static void factoryReset() {
     meters[i].rangeMax = 100.0;
   }
 
-  // Restore pins and calibration
+  // Restore pins and calibration (unless WiFi reset, where a full clean slate
+  // makes more sense since the device is being re-provisioned anyway).
+  if (!clearWifi) {
     for (int i = 0; i < count; i++) {
       meters[i].pin = pins[i];
       meters[i].maxDuty = maxD[i];
     }
+  }
 
   saveConfig();
 
+  if (clearWifi) {
+    WiFiManager wm;
+    wm.resetSettings();
+    Serial.println("[BOOT] WiFi credentials erased");
+  }
+
   // Attach meters temporarily for the sweep acknowledgement
   for (int i = 0; i < count && i < 8; i++) {
     if (meters[i].pin > 0) {
-      ledcSetup(i, PWM_FREQ, PWM_RES);
+      ledcAttach(meters[i].pin, PWM_FREQ, PWM_RES);
-      ledcAttachPin(meters[i].pin, i);
     }
   }
 
-  // Sweep 0→100→0 over ~2 seconds
+  // Sweep 0→100→0 over ~2 seconds as a visual confirmation
   const int steps = 20;
   for (int phase = 0; phase < 2; phase++) {
     for (int s = 0; s <= steps; s++) {
@@ -712,7 +798,7 @@ static void factoryReset() {
       for (int i = 0; i < count && i < 8; i++) {
         if (meters[i].pin > 0 && meters[i].maxDuty > 0) {
           float duty = pct / 100.0f * meters[i].maxDuty / 100.0f;
-          ledcWrite(i, constrain((int)(duty * 1023), 0, 1023));
+          ledcWrite(meters[i].pin, constrain((int)(duty * 1023), 0, 1023));
         }
       }
       delay(50);
@@ -724,26 +810,24 @@ static void factoryReset() {
   ESP.restart();
 }
 
-static void checkFactoryReset() {
+static int incrementResetCount() {
-  const int THRESHOLD = 5;
   int count = 0;
   File f = LittleFS.open("/reset_count", "r");
-  if (f) {
+  if (f) { count = f.parseInt(); f.close(); }
-    count = f.parseInt();
-    f.close();
-  }
   count++;
-  if (count >= THRESHOLD) {
-    LittleFS.remove("/reset_count");
-    Serial.printf("[BOOT] reset count %d, triggering factory reset\n", count);
-    factoryReset();
-    return;
-  }
   f = LittleFS.open("/reset_count", "w");
-  if (f) {
+  if (f) { f.print(count); f.close(); }
-    f.print(count);
+  Serial.printf("[BOOT] reset count %d\n", count);
-    f.close();
+  return count;
-    Serial.printf("[BOOT] reset count %d/%d\n", count, THRESHOLD);
+}
+
+static void applyFactoryResetIfNeeded(int count) {
+  const int THRESHOLD_CONFIG = 5;
+  const int THRESHOLD_WIFI   = 10;
+  LittleFS.remove("/reset_count");
+  if (count >= THRESHOLD_CONFIG) {
+    Serial.printf("[BOOT] reset count %d, triggering factory reset\n", count);
+    factoryReset(count >= THRESHOLD_WIFI);
   }
 }
 
@@ -754,23 +838,44 @@ static void checkFactoryReset() {
 void setup() {
   Serial.begin(115200);
   Serial.println("\n\n=== M1730 boot ===");
+  Serial.printf("[BOOT] chip=%s rev=%d cores=%d cpu=%dMHz flash=%uMB\n",
+                ESP.getChipModel(), ESP.getChipRevision(), ESP.getChipCores(),
+                ESP.getCpuFreqMHz(), ESP.getFlashChipSize() / (1024 * 1024));
+  Serial.printf("[BOOT] free heap=%u sketch=%u / %u\n",
+                ESP.getFreeHeap(), ESP.getSketchSize(), ESP.getFreeSketchSpace());
+  if (!LittleFS.begin(false)) {
+    Serial.println("[FS] mount failed, formatting...");
     LittleFS.begin(true);
+  } else {
+    Serial.println("[FS] mounted OK");
+    File root = LittleFS.open("/");
+    File f = root.openNextFile();
+    while (f) { Serial.printf("[FS]  %s (%u bytes)\n", f.name(), f.size()); f = root.openNextFile(); }
+  }
 
   loadConfig();
-  hostnameParam.setValue(hostname, strlen(hostname));
+  hostnameParam.setValue(hostname, sizeof(hostname) - 1);
 
-  checkFactoryReset();
+  for (int i = 0; i < meterCount; i++)
+    Serial.printf("[BOOT] meter[%d] pin=%d name=\"%s\" unit=\"%s\" maxD=%.1f range=[%.1f,%.1f] cur=%.1f\n",
+                  i, meters[i].pin, meters[i].name, meters[i].unit,
+                  meters[i].maxDuty, meters[i].rangeMin, meters[i].rangeMax, meters[i].currentValue);
+  Serial.printf("[BOOT] mqtt=%d broker=%s:%d prefix=%s\n",
+                mqttCfg.enabled, mqttCfg.host, mqttCfg.port, mqttCfg.prefix);
+  Serial.printf("[BOOT] auth=%d\n", authCfg.enabled);
+
+  int resetCount = incrementResetCount();
 
   attachMeters();
   applyMeters();
 
-  // Reset-counter settle window: if the device stays powered past this point it
+  // Settle window: if the device stays powered past this point it wasn't a
-  // wasn't a rapid power-cycle, so clear the counter here — before the (possibly
+  // rapid power-cycle. After the delay, act on the accumulated count (5x =
-  // indefinitely blocking) WiFi portal — so a stuck/offline boot can't slowly
+  // config reset, 10x = config + WiFi reset) then clear the counter.
-  // accumulate into a false factory reset.
   delay(3000);
-  LittleFS.remove("/reset_count");
+  applyFactoryResetIfNeeded(resetCount);
 
+  applyWifiTxPower();
   Serial.println("[WIFI] starting WiFiManager");
   WiFiManager wm;
   wm.setTitle("M1730");
@@ -785,7 +890,8 @@ void setup() {
     Serial.println("[WIFI] failed, restarting");
     ESP.restart();
   }
-  Serial.printf("[WIFI] connected, IP: %s\n", WiFi.localIP().toString().c_str());
+  Serial.printf("[WIFI] connected, IP: %s MAC: %s RSSI: %d\n",
+                WiFi.localIP().toString().c_str(), WiFi.macAddress().c_str(), WiFi.RSSI());
 
   strlcpy(hostname, hostnameParam.getValue(), sizeof(hostname));
   saveConfig();
@@ -795,6 +901,7 @@ void setup() {
 
   Serial.printf("[BOOT] ready at http://%s.local or http://%s\n",
                 hostname, WiFi.localIP().toString().c_str());
+  Serial.printf("[BOOT] free heap=%u\n", ESP.getFreeHeap());
 }
 
 void loop() {