diff --git a/data/logo.png b/data/logo.png
new file mode 100644
index 0000000..5d18f7d
Binary files /dev/null and b/data/logo.png differ
diff --git a/platformio.ini b/platformio.ini
index 7b1ecd1..3b247a9 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -8,12 +8,37 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
+[env]
+
 [env:esp32-s3-devkitc-1]
 platform = espressif32
 board = esp32-s3-devkitc-1
 framework = arduino
 monitor_speed = 115200
+board_build.filesystem = littlefs
 lib_deps =
     tzapu/WiFiManager@^2.0.17
     bblanchon/ArduinoJson@^7.0.0
     knolleary/PubSubClient@^2.8
+
+[env:esp32dev]
+board = esp32dev
+framework = arduino
+platform = espressif32
+monitor_speed = 115200
+board_build.filesystem = littlefs
+lib_deps =
+    tzapu/WiFiManager@^2.0.17
+    bblanchon/ArduinoJson@^7.4.3
+    knolleary/PubSubClient@^2.8
+
+[env:esp32-C3-devkitm-1]
+board = esp32-c3-devkitm-1
+framework = arduino
+platform = espressif32
+monitor_speed = 115200
+board_build.filesystem = littlefs
+lib_deps =
+    tzapu/WiFiManager@^2.0.17
+    bblanchon/ArduinoJson@^7.4.3
+    knolleary/PubSubClient@^2.8
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index b1f17bd..33232d1 100644
--- a/src/main.cpp
+++ b/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);
@@ -413,6 +413,21 @@ 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 /");
@@ -515,7 +530,7 @@ 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)}";
@@ -532,6 +547,8 @@ 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){";
@@ -550,6 +567,10 @@ html += ".switch input:checked+.slid{background:#4361ee}.switch input:checked+.s
 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 +578,8 @@ 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 +646,12 @@ 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() {
@@ -643,19 +672,23 @@ 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.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() {
-  Serial.println("[BOOT] factory reset triggered!");
+static void factoryReset(bool clearWifi) {
+  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 +697,9 @@ 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';
@@ -688,14 +721,23 @@ static void factoryReset() {
     meters[i].rangeMax = 100.0;
   }
 
-  // Restore pins and calibration
-  for (int i = 0; i < count; i++) {
-    meters[i].pin = pins[i];
-    meters[i].maxDuty = maxD[i];
+  // 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) {
@@ -704,7 +746,7 @@ static void factoryReset() {
     }
   }
 
-  // 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++) {
@@ -724,26 +766,24 @@ static void factoryReset() {
   ESP.restart();
 }
 
-static void checkFactoryReset() {
-  const int THRESHOLD = 5;
+static int incrementResetCount() {
   int count = 0;
   File f = LittleFS.open("/reset_count", "r");
-  if (f) {
-    count = f.parseInt();
-    f.close();
-  }
+  if (f) { 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) {
-    f.print(count);
-    f.close();
-    Serial.printf("[BOOT] reset count %d/%d\n", count, THRESHOLD);
+  if (f) { f.print(count); f.close(); }
+  Serial.printf("[BOOT] reset count %d\n", count);
+  return count;
+}
+
+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);
   }
 }
 
@@ -754,22 +794,29 @@ static void checkFactoryReset() {
 void setup() {
   Serial.begin(115200);
   Serial.println("\n\n=== M1730 boot ===");
-  LittleFS.begin(true);
+  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();
+  int resetCount = incrementResetCount();
 
   attachMeters();
   applyMeters();
 
-  // Reset-counter settle window: if the device stays powered past this point it
-  // wasn't a rapid power-cycle, so clear the counter here — before the (possibly
-  // indefinitely blocking) WiFi portal — so a stuck/offline boot can't slowly
-  // accumulate into a false factory reset.
+  // Settle window: if the device stays powered past this point it wasn't a
+  // rapid power-cycle. After the delay, act on the accumulated count (5x =
+  // config reset, 10x = config + WiFi reset) then clear the counter.
   delay(3000);
-  LittleFS.remove("/reset_count");
+  applyFactoryResetIfNeeded(resetCount);
 
   Serial.println("[WIFI] starting WiFiManager");
   WiFiManager wm;