diff --git a/API.md b/API.md
index a0702b8..8828ac7 100644
--- a/API.md
+++ b/API.md
@@ -7,87 +7,87 @@ All API endpoints return JSON unless otherwise noted.
 
 ## Static Files
 
-| Route            | Method | Description                  | Response Type |
-|------------------|--------|------------------------------|--------------|
-| `/`              | GET    | Main page                    | HTML         |
-| `/settings`      | GET    | Settings page                | HTML         |
-| `/rfid`          | GET    | RFID page                    | HTML         |
-| `/firmware.bin`  | GET    | Firmware file (SPIFFS)       | Binary       |
+| Route           | Method | Description            | Response Type |
+| --------------- | ------ | ---------------------- | ------------- |
+| `/`             | GET    | Main page              | HTML          |
+| `/settings`     | GET    | Settings page          | HTML          |
+| `/rfid`         | GET    | RFID page              | HTML          |
+| `/firmware.bin` | GET    | Firmware file (SPIFFS) | Binary        |
 
 ---
 
 ## Timer & Data
 
-| Route             | Method | Description                        | Request Body/Params | Response Example |
-|-------------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/data`       | GET    | Get current timer and status data   | –                  | `{...}`          |
-| `/api/reset-best` | POST   | Reset best times                    | –                  | `{ "success": true }` |
+| Route             | Method | Description                       | Request Body/Params | Response Example      |
+| ----------------- | ------ | --------------------------------- | ------------------- | --------------------- |
+| `/api/data`       | GET    | Get current timer and status data | –                   | `{...}`               |
+| `/api/reset-best` | POST   | Reset best times                  | –                   | `{ "success": true }` |
 
 ---
 
 ## Button Learning
 
-| Route                  | Method | Description                        | Request Body/Params | Response Example |
-|------------------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/unlearn-button`  | POST   | Remove all button assignments       | –                  | `{ "success": true }` |
-| `/api/start-learning`  | POST   | Start button learning mode          | –                  | `{ "success": true }` |
-| `/api/stop-learning`   | POST   | Stop button learning mode           | –                  | `{ "success": true }` |
-| `/api/learn/status`    | GET    | Get learning mode status            | –                  | `{ "active": true, "step": 1 }` |
-| `/api/buttons/status`  | GET    | Get button assignment and voltage   | –                  | `{ "lane1Start": true, "lane1StartVoltage": 3.3, ... }` |
+| Route                 | Method | Description                       | Request Body/Params | Response Example                                        |
+| --------------------- | ------ | --------------------------------- | ------------------- | ------------------------------------------------------- |
+| `/api/unlearn-button` | POST   | Remove all button assignments     | –                   | `{ "success": true }`                                   |
+| `/api/start-learning` | POST   | Start button learning mode        | –                   | `{ "success": true }`                                   |
+| `/api/stop-learning`  | POST   | Stop button learning mode         | –                   | `{ "success": true }`                                   |
+| `/api/learn/status`   | GET    | Get learning mode status          | –                   | `{ "active": true, "step": 1 }`                         |
+| `/api/buttons/status` | GET    | Get button assignment and voltage | –                   | `{ "lane1Start": true, "lane1StartVoltage": 3.3, ... }` |
 
 ---
 
 ## Settings
 
-| Route                | Method | Description                        | Request Body/Params | Response Example |
-|----------------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/set-max-time`  | POST   | Set max timer and display time      | `maxTime`, `maxTimeDisplay` (form params, seconds) | `{ "success": true }` |
-| `/api/get-settings`  | GET    | Get current timer settings          | –                  | `{ "maxTime": 300, "maxTimeDisplay": 20 }` |
+| Route               | Method | Description                    | Request Body/Params                                                         | Response Example                                                       |
+| ------------------- | ------ | ------------------------------ | --------------------------------------------------------------------------- | ---------------------------------------------------------------------- |
+| `/api/set-max-time` | POST   | Set max timer and display time | `maxTime`, `maxTimeDisplay`, `minTimeForLeaderboard` (form params, seconds) | `{ "success": true }`                                                  |
+| `/api/get-settings` | GET    | Get current timer settings     | –                                                                           | `{ "maxTime": 300, "maxTimeDisplay": 20, "minTimeForLeaderboard": 5 }` |
 
 ---
 
 ## WiFi Configuration
 
-| Route             | Method | Description                        | Request Body/Params | Response Example |
-|-------------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/set-wifi`   | POST   | Set WiFi SSID and password          | `ssid`, `password` (form params) | `{ "success": true }` |
-| `/api/get-wifi`   | GET    | Get current WiFi SSID and password  | –                  | `{ "ssid": "...", "password": "..." }` |
+| Route           | Method | Description                        | Request Body/Params              | Response Example                       |
+| --------------- | ------ | ---------------------------------- | -------------------------------- | -------------------------------------- |
+| `/api/set-wifi` | POST   | Set WiFi SSID and password         | `ssid`, `password` (form params) | `{ "success": true }`                  |
+| `/api/get-wifi` | GET    | Get current WiFi SSID and password | –                                | `{ "ssid": "...", "password": "..." }` |
 
 ---
 
 ## Location Configuration
 
-| Route                | Method | Description                        | Request Body/Params | Response Example |
-|----------------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/set-location`  | POST   | Set location name and ID            | `id`, `name` (form params) | `{ "success": true }` |
-| `/api/get-location`  | GET    | Get current location                | –                  | `{ "locationid": "..." }` |
+| Route               | Method | Description              | Request Body/Params        | Response Example          |
+| ------------------- | ------ | ------------------------ | -------------------------- | ------------------------- |
+| `/api/set-location` | POST   | Set location name and ID | `id`, `name` (form params) | `{ "success": true }`     |
+| `/api/get-location` | GET    | Get current location     | –                          | `{ "locationid": "..." }` |
 
 ---
 
 ## Button Update & Mode
 
-| Route                | Method | Description                        | Request Body/Params | Response Example |
-|----------------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/updateButtons` | GET    | Trigger MQTT update for buttons     | –                  | `{ "success": true }` |
-| `/api/set-mode`      | POST   | Set operational mode                | `mode` (form param: "individual" or "wettkampf") | `{ "success": true }` |
-| `/api/get-mode`      | GET    | Get current operational mode        | –                  | `{ "mode": "individual" }` |
+| Route                | Method | Description                     | Request Body/Params                              | Response Example           |
+| -------------------- | ------ | ------------------------------- | ------------------------------------------------ | -------------------------- |
+| `/api/updateButtons` | GET    | Trigger MQTT update for buttons | –                                                | `{ "success": true }`      |
+| `/api/set-mode`      | POST   | Set operational mode            | `mode` (form param: "individual" or "wettkampf") | `{ "success": true }`      |
+| `/api/get-mode`      | GET    | Get current operational mode    | –                                                | `{ "mode": "individual" }` |
 
 ---
 
 ## System Info
 
-| Route         | Method | Description                        | Request Body/Params | Response Example |
-|---------------|--------|-------------------------------------|--------------------|------------------|
-| `/api/info`   | GET    | Get system info (IP, MAC, memory, license, etc.) | – | `{ "ip": "...", "ipSTA": "...", "channel": 1, "mac": "...", "freeMemory": 123456, "connectedButtons": 3, "isOnline": true, "valid": "Ja", "tier": 1 }` |
+| Route       | Method | Description                                      | Request Body/Params | Response Example                                                                                                                                       |
+| ----------- | ------ | ------------------------------------------------ | ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| `/api/info` | GET    | Get system info (IP, MAC, memory, license, etc.) | –                   | `{ "ip": "...", "ipSTA": "...", "channel": 1, "mac": "...", "freeMemory": 123456, "connectedButtons": 3, "isOnline": true, "valid": "Ja", "tier": 1 }` |
 
 ---
 
 ## WebSocket
 
-| Route   | Description                        |
-|---------|------------------------------------|
-| `/ws`   | WebSocket endpoint for live updates|
+| Route | Description                         |
+| ----- | ----------------------------------- |
+| `/ws` | WebSocket endpoint for live updates |
 
 ---
 
-**All API endpoints return JSON unless otherwise noted. POST requests expect form parameters (not JSON body).**
\ No newline at end of file
+**All API endpoints return JSON unless otherwise noted. POST requests expect form parameters (not JSON body).**
diff --git a/apientpoints b/apientpoints
index 9e32638..2d01232 100644
--- a/apientpoints
+++ b/apientpoints
@@ -9,7 +9,7 @@ POST /api/unlearn-button
 → Verlernt alle Button-Zuordnungen
 
 POST /api/set-max-time
-→ Setzt die maximale Zeit und maxTimeDisplay
+→ Setzt die maximale Zeit, maxTimeDisplay und minTimeForLeaderboard
 
 GET /api/get-settings
 → Gibt die aktuellen Einstellungen zurück
diff --git a/data/firmware.bin b/data/firmware.bin
deleted file mode 100644
index 624ab84..0000000
Binary files a/data/firmware.bin and /dev/null differ
diff --git a/data/settings.html b/data/settings.html
index ee9dc6c..50382fe 100644
--- a/data/settings.html
+++ b/data/settings.html
@@ -182,6 +182,18 @@
                 title="Zeit nach der die angezeigte Zeit zurückgesetzt wird"
               />
             </div>
+            <div class="form-group">
+              <label for="minTimeForLeaderboard">Minimale Zeit für Leaderboard (Sekunden):</label>
+              <input
+                type="number"
+                id="minTimeForLeaderboard"
+                name="minTimeForLeaderboard"
+                min="1"
+                max="300"
+                value="5"
+                title="Zeiten unter diesem Wert werden nicht ins lokale Leaderboard eingetragen (Missbrauchsschutz)"
+              />
+            </div>
             <div class="button-group">
               <button type="submit" class="btn btn-primary">
                 💾 Einstellungen speichern
@@ -718,6 +730,8 @@
             document.getElementById("maxTime").value = data.maxTime || 300;
             document.getElementById("maxTimeDisplay").value =
               data.maxTimeDisplay || 20;
+            document.getElementById("minTimeForLeaderboard").value =
+              data.minTimeForLeaderboard || 5;
           })
           .catch((error) =>
             showMessage("Fehler beim Laden der Einstellungen", "error")
@@ -971,6 +985,9 @@
           const maxTimeDisplay = parseInt(
             document.getElementById("maxTimeDisplay").value
           );
+          const minTimeForLeaderboard = parseInt(
+            document.getElementById("minTimeForLeaderboard").value
+          );
 
           fetch("/api/set-max-time", {
             method: "POST",
@@ -981,7 +998,9 @@
               "maxTime=" +
               encodeURIComponent(maxTime) +
               "&maxTimeDisplay=" +
-              encodeURIComponent(maxTimeDisplay),
+              encodeURIComponent(maxTimeDisplay) +
+              "&minTimeForLeaderboard=" +
+              encodeURIComponent(minTimeForLeaderboard),
           })
             .then((response) => response.json())
             .then((data) => {
diff --git a/platformio.ini b/platformio.ini
index 0127d19..9f29cf2 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -52,6 +52,7 @@ lib_deps =
 	adafruit/Adafruit PN532@^1.3.4
 
 
+
 [env:esp32thing]
 board = esp32thing_plus
 monitor_speed = 115200
@@ -87,14 +88,41 @@ lib_deps =
 	mlesniew/PicoMQTT@^1.3.0
 	adafruit/Adafruit PN532@^1.3.4
 
-[env:esp32-s3-devkitc-1]
-board = esp32-s3-devkitc-1
+[env:um_feathers3]
+board = um_feathers3
 monitor_speed = 115200
 board_upload.flash_size = 16MB
 board_build.partitions = default_16MB.csv
+board_upload.wait_for_upload_port = false 
 build_flags = 
-	-DARDUINO_USB_CDC_ON_BOOT=1
-	-DBATTERY_PIN=35
+	-D ARDUINO_USB_CDC_ON_BOOT=1
+	-D BATTERY_PIN=35
+	-D ARDUINO_USB_MODE=1
+	
+lib_deps = 
+	bblanchon/ArduinoJson@^7.4.1
+	esp32async/ESPAsyncWebServer@^3.7.7
+	esp32async/AsyncTCP@^3.4.2
+	mlesniew/PicoMQTT@^1.3.0
+	adafruit/Adafruit PN532@^1.3.4
+
+[env:um_feathers3_debug]
+board = um_feathers3
+board_upload.flash_size = 16MB
+board_build.partitions = default_16MB.csv
+board_upload.wait_for_upload_port = false 
+build_flags = 
+	-D ARDUINO_USB_CDC_ON_BOOT=1
+	-D BATTERY_PIN=35
+	-D ARDUINO_USB_MODE=0
+
+build_type = debug
+debug_speed = 12000
+debug_tool = esp-builtin
+upload_port = COM5
+monitor_speed = 115200
+monitor_port = COM7
+
 lib_deps = 
 	bblanchon/ArduinoJson@^7.4.1
 	esp32async/ESPAsyncWebServer@^3.7.7
diff --git a/src/databasebackend.h b/src/databasebackend.h
index 340b3c1..13f8553 100644
--- a/src/databasebackend.h
+++ b/src/databasebackend.h
@@ -526,6 +526,15 @@ void sendTimeToOnlineAPI(int lane, String uid, float timeInSeconds) {
 
 // Funktionen für lokales Leaderboard
 void addLocalTime(String uid, String name, unsigned long timeMs) {
+  // Prüfe minimale Zeit für Leaderboard-Eintrag
+  if (timeMs < minTimeForLeaderboard) {
+    Serial.printf(
+        "Zeit zu kurz für Leaderboard: %s (%s) - %.2fs (Minimum: %.2fs)\n",
+        name.c_str(), uid.c_str(), timeMs / 1000.0,
+        minTimeForLeaderboard / 1000.0);
+    return; // Zeit wird nicht ins Leaderboard eingetragen
+  }
+
   LocalTime newTime;
   newTime.uid = uid;
   newTime.name = name;
diff --git a/src/master.h b/src/master.h
index 5359039..33dd487 100644
--- a/src/master.h
+++ b/src/master.h
@@ -72,7 +72,9 @@ bool learningMode = false;
 int learningStep = 0; // 0=Start1, 1=Stop1, 2=Start2, 3=Stop2
 unsigned long maxTimeBeforeReset = 300000; // 5 Minuten default
 unsigned long maxTimeDisplay = 20000;      // 20 Sekunden Standard (in ms)
-bool wifimodeAP = false;                   // AP-Modus deaktiviert
+unsigned long minTimeForLeaderboard =
+    5000;                // 5 Sekunden minimum für Leaderboard (in ms)
+bool wifimodeAP = false; // AP-Modus deaktiviert
 String masterlocation;
 int gamemode;                  // 0=Individual, 1=Wettkampf
 bool startCompetition = false; // Flag, ob der Timer gestartet wurde
diff --git a/src/preferencemanager.h b/src/preferencemanager.h
index aff1955..90c2c89 100644
--- a/src/preferencemanager.h
+++ b/src/preferencemanager.h
@@ -82,6 +82,7 @@ void saveSettings() {
   preferences.begin("settings", false);
   preferences.putULong("maxTime", maxTimeBeforeReset);
   preferences.putULong("maxTimeDisplay", maxTimeDisplay);
+  preferences.putULong("minTime", minTimeForLeaderboard);
   preferences.putUInt("gamemode", gamemode);
   preferences.putUInt("laneConfigType", laneConfigType);
   preferences.putUInt("lane1Diff", lane1DifficultyType);
@@ -93,6 +94,7 @@ void loadSettings() {
   preferences.begin("settings", true);
   maxTimeBeforeReset = preferences.getULong("maxTime", 300000);
   maxTimeDisplay = preferences.getULong("maxTimeDisplay", 20000);
+  minTimeForLeaderboard = preferences.getULong("minTime", 5000);
   gamemode = preferences.getUInt("gamemode", 0);
   laneConfigType = preferences.getUInt("laneConfigType", 0);
   lane1DifficultyType = preferences.getUInt("lane1Diff", 0);
diff --git a/src/webserverrouter.h b/src/webserverrouter.h
index aaeb3e4..485fa92 100644
--- a/src/webserverrouter.h
+++ b/src/webserverrouter.h
@@ -84,6 +84,12 @@ void setupRoutes() {
           request->getParam("maxTimeDisplay", true)->value().toInt() * 1000;
       changed = true;
     }
+    if (request->hasParam("minTimeForLeaderboard", true)) {
+      minTimeForLeaderboard =
+          request->getParam("minTimeForLeaderboard", true)->value().toInt() *
+          1000;
+      changed = true;
+    }
     if (changed) {
       saveSettings();
       DynamicJsonDocument doc(32);
@@ -101,6 +107,7 @@ void setupRoutes() {
     DynamicJsonDocument doc(256);
     doc["maxTime"] = maxTimeBeforeReset / 1000;
     doc["maxTimeDisplay"] = maxTimeDisplay / 1000;
+    doc["minTimeForLeaderboard"] = minTimeForLeaderboard / 1000;
     String result;
     serializeJson(doc, result);
     request->send(200, "application/json", result);