diff --git a/build_and_flash.sh b/build_and_flash.sh
index 381c9fc..4082742 100755
--- a/build_and_flash.sh
+++ b/build_and_flash.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # The script will build and flash Yaeger to your ESP device.
 # Ensure this script is executable (`chmod +x build_and_flash.sh`) and has the correct permissions.
@@ -12,7 +13,7 @@
 #
 # If you cloned the project from GitHub, ensure all folders have the correct permissions:
 #   chmod -R u+rwX .
-# The SPIFFS filesystem might fail if permissions are incorrect.
+# The LittleFS filesystem might fail if permissions are incorrect.
 
 # Step 0: Check for required parameter (s3 or s3-mini)
 if [[ -z "$1" ]]; then
@@ -30,6 +31,19 @@ fi
 
 echo "Using PlatformIO environment: $PIO_ENV"
 
+
+read -p "Choose frontend (r for reyaeger, empty for classic): " frontend
+
+if [ $frontend = 'r' ]; then
+
+echo "reyaeger download";
+curl -L https://github.com/RobTS/reyaeger/releases/latest/download/reyaeger.zip > reyaeger.zip
+rm -rf data
+mkdir data
+unzip -d ./data ./reyaeger.zip
+
+else
+
 # Step 1: Navigate to the miniweb directory
 echo "Navigating to miniweb..."
 cd miniweb || { echo "miniweb folder not found!"; exit 1; }
@@ -46,14 +60,15 @@ npm run build || { echo "npm build failed!"; exit 1; }
 echo "Returning to the project root..."
 
 cd .. || exit 1
+fi
 
 # Step 5: Erase the device memory (optional but recommended)
 echo "Erasing the device memory..."
 pio run -e "$PIO_ENV" -t erase || { echo "Memory erase failed!"; exit 1; }
 
-# Step 6: Build and upload the SPIFFS filesystem
-echo "Building and uploading SPIFFS filesystem..."
-pio run -e "$PIO_ENV" -t buildfs -t uploadfs || { echo "SPIFFS upload failed!"; exit 1; }
+# Step 6: Build and upload the LittleFS filesystem
+echo "Building and uploading LittleFS filesystem..."
+pio run -e "$PIO_ENV" -t buildfs -t uploadfs || { echo "LittleFS upload failed!"; exit 1; }
 
 # Step 7: Build and upload the firmware
 echo "Building and uploading the firmware..."
diff --git a/platformio.ini b/platformio.ini
index e3cf1e4..c601e6a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -28,7 +28,7 @@ build_flags =
 	; -D ARDUINO_USB_CDC_ON_BOOT=1
 lib_compat_mode = strict
 lib_deps = 
-	ayushsharma82/ElegantOTA @ ^3.1.4
+	ayushsharma82/ElegantOTA
 	ArduinoJson
 	Adafruit NeoPixel
 	adafruit/Adafruit MAX31855 library
diff --git a/src/CommandLoop.cpp b/src/CommandLoop.cpp
index 54f77a8..0ec45d8 100644
--- a/src/CommandLoop.cpp
+++ b/src/CommandLoop.cpp
@@ -6,6 +6,10 @@
 #include <ESPAsyncWebServer.h>
 #include <cmath>
 #include <cstring>
+#include <Preferences.h>
+
+Preferences preferences;
+
 
 void onWsEvent(AsyncWebSocket *server, AsyncWebSocketClient *client,
                AwsEventType type, void *arg, uint8_t *data, size_t len) {
@@ -20,7 +24,7 @@ void onWsEvent(AsyncWebSocket *server, AsyncWebSocketClient *client,
     logf("[%u] Disconnected!\n", client->id());
     // turn off heater and set fan to 100%
     setHeaterPower(0);
-    setFanSpeed(100);
+    setFanSpeed(preferences.getLong("coolFanSpeed", 65));
   } break;
   case WS_EVT_DATA: {
 
@@ -80,17 +84,54 @@ void onWsEvent(AsyncWebSocket *server, AsyncWebSocketClient *client,
       setFanSpeed(val);
     }
 
+    // Safeguard to prevent heater fuse blowout
+    if (getHeaterPower() > 0  && getFanSpeed() <= 30) {
+       setFanSpeed(30);
+    }
+
+    if (command != NULL && strncmp(command, "setPreferences", 14) == 0) {
+      if (!doc["pidKp"].isNull()) {
+        double pidKp = doc["pidKp"].as<double>();
+        preferences.putDouble("pidKp", pidKp);
+      }
+      if (!doc["pidKi"].isNull()) {
+        double pidKi = doc["pidKi"].as<double>();
+        preferences.putDouble("pidKi", pidKi);
+      }
+      if (!doc["pidKd"].isNull()) {
+        double pidKd = doc["pidKd"].as<double>();
+        preferences.putDouble("pidKd", pidKd);
+      }
+      if (!doc["cooldownFanSpeed"].isNull()) {
+        long cooldownFanSpeed = doc["cooldownFanSpeed"].as<long>();
+        logf("cooldownFanSpeed: %d\n", cooldownFanSpeed);
+        preferences.putLong("coolFanSpeed", cooldownFanSpeed);
+      }
+    }
+
+    if (command != NULL && (strncmp(command, "setPreferences", 14) == 0 || strncmp(command, "getPreferences", 14) == 0)) {
+      JsonObject root = doc.to<JsonObject>();
+      JsonObject data = root.createNestedObject("data");
+      root["id"] = ln_id;
+      data["type"] = "preferences";
+      data["pidKp"] = preferences.getDouble("pidKp", 1.0);
+      data["pidKi"] = preferences.getDouble("pidKi", 0.1);
+      data["pidKd"] = preferences.getDouble("pidKd", 0.01);
+      data["cooldownFanSpeed"] = preferences.getLong("coolFanSpeed", 65);
+    }
+
     if (command != NULL && strncmp(command, "getData", 7) == 0) {
-    JsonObject root = doc.to<JsonObject>();
-    JsonObject data = root.createNestedObject("data");
-    root["id"] = ln_id;
-    float etbt[3];
-    getETBTReadings(etbt);
-    data["ET"] = etbt[0]; // Med_ExhaustTemp.getMedian()
-    data["BT"] = etbt[1]; // Med_BeanTemp.getMedian();
-    data["Amb"] = etbt[2];
-    data["BurnerVal"] = getHeaterPower(); // float(DimmerVal);
-    data["FanVal"] = getFanSpeed();
+      JsonObject root = doc.to<JsonObject>();
+      JsonObject data = root.createNestedObject("data");
+      root["id"] = ln_id;
+      float etbt[3];
+      getETBTReadings(etbt);
+      data["type"] = "status";
+      data["ET"] = etbt[0]; // Med_ExhaustTemp.getMedian()
+      data["BT"] = etbt[1]; // Med_BeanTemp.getMedian();
+      data["Amb"] = etbt[2];
+      data["BurnerVal"] = getHeaterPower(); // float(DimmerVal);
+      data["FanVal"] = getFanSpeed();
     }
 
     char buffer[200];                        // create temp buffer
@@ -112,4 +153,7 @@ void onWsEvent(AsyncWebSocket *server, AsyncWebSocketClient *client,
   }
 }
 
-void setupMainLoop(AsyncWebSocket *ws) { ws->onEvent(onWsEvent); }
+void setupMainLoop(AsyncWebSocket *ws) {
+  preferences.begin("preferences");
+  ws->onEvent(onWsEvent);
+}
diff --git a/src/main.cpp b/src/main.cpp
index 18b1be7..1d44057 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -79,6 +79,8 @@ void setup(void) {
     Serial.println("LittleFS failed");
   }
   server.serveStatic("/", LittleFS, "/").setDefaultFile("index.html");
+  server.serveStatic("/settings", LittleFS, "/").setDefaultFile("index.html");
+  server.serveStatic("/editor", LittleFS, "/").setDefaultFile("index.html");
 
   ElegantOTA.begin(&server); // Start ElegantOTA
   // ElegantOTA callbacks