diff --git a/firmware-arduino/src/Audio.cpp b/firmware-arduino/src/Audio.cpp
index 8774d64..3fb7f71 100644
--- a/firmware-arduino/src/Audio.cpp
+++ b/firmware-arduino/src/Audio.cpp
@@ -1,10 +1,10 @@
+#include <WebSocketsClient.h>
 #include "OTA.h"
 #include "Print.h"
 #include "Config.h"
 #include "AudioTools.h"
 // #include "AudioTools/Concurrency/RTOS.h"
 #include "AudioTools/AudioCodecs/CodecOpus.h"
-#include <WebSocketsClient.h>
 #include "Audio.h"
 #include "PitchShift.h"
 
@@ -31,7 +31,7 @@ const int BITS_PER_SAMPLE = 16; // 16-bit audio
 // AUDIO OUTPUT
 class BufferPrint : public Print {
 public:
-  BufferPrint(BufferRTOS<uint8_t>& buf) : _buffer(buf) {}
+  explicit BufferPrint(BufferRTOS<uint8_t>& buf) : _buffer(buf) {}
 
   // networkTask -> webSocket.loop() -> webSocketEvent(WStype_BIN, ...) -> opusDecoder.write() -> bufferPrint.write()
   virtual size_t write(uint8_t data) override {
@@ -230,7 +230,7 @@ void micTask(void *parameter) {
     micToWsCopier.setDelayOnNoData(0);
 
     while (1) {
-        if ( i2sInputFlushScheduled ) {
+        if (i2sInputFlushScheduled) {
             i2sInputFlushScheduled = false;
             i2sInput.flush();
         }
@@ -249,7 +249,7 @@ void micTask(void *parameter) {
 
 // WEBSOCKET EVENTS
 // networkTask -> webSocket.loop() -> webSocketEvent()
-void webSocketEvent(WStype_t type, uint8_t *payload, size_t length)
+void webSocketEvent(WStype_t type, const uint8_t *payload, size_t length)
 {
     switch (type)
     {
@@ -367,9 +367,9 @@ void webSocketEvent(WStype_t type, uint8_t *payload, size_t length)
 }
 
 // wifiTask -> WIFIMANAGER::loop() -> WIFIMANAGER::tryConnect() -> connectCb() -> websocketSetup()
-void websocketSetup(String server_domain, int port, String path)
+void websocketSetup(const String& server_domain, int port, const String& path)
 {
-    String headers = "Authorization: Bearer " + String(authTokenGlobal);
+    const String headers = "Authorization: Bearer " + String(authTokenGlobal);
 
     xSemaphoreTake(wsMutex, portMAX_DELAY);
 
diff --git a/firmware-arduino/src/Audio.h b/firmware-arduino/src/Audio.h
index f6d0c2f..41474a1 100644
--- a/firmware-arduino/src/Audio.h
+++ b/firmware-arduino/src/Audio.h
@@ -1,10 +1,12 @@
+#ifndef AUDIO_H
+#define AUDIO_H
 
-#include "Print.h"
-#include "Config.h"
-#include "AudioTools.h"
-// #include "AudioTools/Concurrency/RTOS.h"
-#include "AudioTools/AudioCodecs/CodecOpus.h"
 #include <WebSocketsClient.h>
+#include "Print.h"
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecOpus.h"
+// #include "AudioTools/Concurrency/RTOS.h"
+#include "Config.h"
 
 extern SemaphoreHandle_t wsMutex;
 extern WebSocketsClient webSocket;
@@ -44,8 +46,8 @@ extern StreamCopy micToWsCopier;
 extern volatile bool i2sInputFlushScheduled;
 
 // WEBSOCKET
-void webSocketEvent(WStype_t type, uint8_t *payload, size_t length);
-void websocketSetup(String server_domain, int port, String path);
+void webSocketEvent(WStype_t type, const uint8_t *payload, size_t length);
+void websocketSetup(const String& server_domain, int port, const String& path);
 void networkTask(void *parameter);
 
 // AUDIO OUTPUT
@@ -53,4 +55,6 @@ unsigned long getSpeakingDuration();
 void audioStreamTask(void *parameter);
 
 // AUDIO INPUT
-void micTask(void *parameter);
\ No newline at end of file
+void micTask(void *parameter);
+
+#endif
\ No newline at end of file
diff --git a/firmware-arduino/src/Config.cpp b/firmware-arduino/src/Config.cpp
index 67b372d..63f04f2 100644
--- a/firmware-arduino/src/Config.cpp
+++ b/firmware-arduino/src/Config.cpp
@@ -1,5 +1,5 @@
-#include "Config.h"
 #include <nvs_flash.h>
+#include "Config.h"
 
 // ! define preferences
 Preferences preferences;
diff --git a/firmware-arduino/src/FactoryReset.h b/firmware-arduino/src/FactoryReset.h
index 7f4ce3d..5da67a4 100644
--- a/firmware-arduino/src/FactoryReset.h
+++ b/firmware-arduino/src/FactoryReset.h
@@ -1,6 +1,9 @@
-#include <Config.h>
+#ifndef FACTORYRESET_H
+#define FACTORYRESET_H
+
 #include <nvs_flash.h>
 #include <ESPAsyncWebServer.h> //https://github.com/me-no-dev/ESPAsyncWebServer using the latest dev version from @me-no-dev
+#include "Config.h"
 
 void setResetComplete() {
     HTTPClient http;
@@ -62,19 +65,21 @@ void setFactoryResetStatusInNVS(bool status)
 }
 
 void factoryResetDevice() {
-       Serial.println("Factory reset device");
-       
-       // Erase the NVS partition
-       esp_err_t err = nvs_flash_erase();
-       if (err != ESP_OK) {
-           Serial.printf("Error erasing NVS: %d\n", err);
-           return;
-       }
-       
-       // Reinitialize NVS
-       err = nvs_flash_init();
-       if (err != ESP_OK) {
-           Serial.printf("Error initializing NVS: %d\n", err);
-           return;
-       }
-   }
\ No newline at end of file
+    Serial.println("Factory reset device");
+    
+    // Erase the NVS partition
+    esp_err_t err = nvs_flash_erase();
+    if (err != ESP_OK) {
+        Serial.printf("Error erasing NVS: %d\n", err);
+        return;
+    }
+    
+    // Reinitialize NVS
+    err = nvs_flash_init();
+    if (err != ESP_OK) {
+        Serial.printf("Error initializing NVS: %d\n", err);
+        return;
+    }
+}
+
+#endif
\ No newline at end of file
diff --git a/firmware-arduino/src/LEDHandler.cpp b/firmware-arduino/src/LEDHandler.cpp
index 3fee3dd..0f3444b 100644
--- a/firmware-arduino/src/LEDHandler.cpp
+++ b/firmware-arduino/src/LEDHandler.cpp
@@ -12,7 +12,7 @@ void setLEDColor(uint8_t r, uint8_t g, uint8_t b)
     analogWrite(BLUE_LED_PIN, b);
 }
 
-enum class StaticColor
+enum class StaticColor : uint8_t
 {
     RED,
     GREEN,
@@ -22,41 +22,44 @@ enum class StaticColor
     CYAN,
 };
 
+struct RGB {
+    bool red;
+    bool green;
+    bool blue;
+};
+
 void setStaticColor(StaticColor color)
 {
+    RGB colorMap;
+
     switch (color)
     {
     case StaticColor::RED:
-        digitalWrite(RED_LED_PIN, LOW);
-        digitalWrite(GREEN_LED_PIN, HIGH);
-        digitalWrite(BLUE_LED_PIN, HIGH);
+        colorMap = {LOW, HIGH, HIGH};
         break;
     case StaticColor::GREEN:
-        digitalWrite(RED_LED_PIN, HIGH);
-        digitalWrite(GREEN_LED_PIN, LOW);
-        digitalWrite(BLUE_LED_PIN, HIGH);
+        colorMap = {HIGH, LOW, HIGH};
         break;
     case StaticColor::BLUE:
-        digitalWrite(RED_LED_PIN, HIGH);
-        digitalWrite(GREEN_LED_PIN, HIGH);
-        digitalWrite(BLUE_LED_PIN, LOW);
+        colorMap = {HIGH, HIGH, LOW};
         break;
     case StaticColor::YELLOW:
-        digitalWrite(RED_LED_PIN, LOW);
-        digitalWrite(GREEN_LED_PIN, LOW);
-        digitalWrite(BLUE_LED_PIN, HIGH);
+        colorMap = {LOW, LOW, HIGH};
         break;
     case StaticColor::MAGENTA:
-        digitalWrite(RED_LED_PIN, LOW);
-        digitalWrite(GREEN_LED_PIN, HIGH);
-        digitalWrite(BLUE_LED_PIN, LOW);
+        colorMap = {LOW, HIGH, LOW};
         break;
     case StaticColor::CYAN:
-        digitalWrite(RED_LED_PIN, HIGH);
-        digitalWrite(GREEN_LED_PIN, LOW);
-        digitalWrite(BLUE_LED_PIN, LOW);
+        colorMap = {HIGH, LOW, LOW};
+        break;
+    default:
+        colorMap = {HIGH, HIGH, HIGH};
         break;
     }
+
+    digitalWrite(RED_LED_PIN, colorMap.red);
+    digitalWrite(GREEN_LED_PIN, colorMap.green);
+    digitalWrite(BLUE_LED_PIN, colorMap.blue);
 }
 
 void loopCyanPinkYellow()
@@ -122,47 +125,26 @@ void pulseBlue()
 
 void blinkWhite()
 {
-    if (ledState)
-    {
-        digitalWrite(RED_LED_PIN, HIGH);
-        digitalWrite(GREEN_LED_PIN, HIGH);
-        digitalWrite(BLUE_LED_PIN, HIGH);
-    }
-    else
-    {
-        digitalWrite(RED_LED_PIN, LOW);
-        digitalWrite(GREEN_LED_PIN, LOW);
-        digitalWrite(BLUE_LED_PIN, LOW);
-    }
+    int ledState = ledState ? HIGH : LOW;
+    digitalWrite(RED_LED_PIN, ledState);
+    digitalWrite(GREEN_LED_PIN, ledState);
+    digitalWrite(BLUE_LED_PIN, ledState);
 }
 
 void blinkGreen()
 {
+    int ledState = ledState ? HIGH : LOW;
     digitalWrite(BLUE_LED_PIN, LOW);
-    digitalWrite(RED_LED_PIN, LOW);
-    if (ledState)
-    {
-        digitalWrite(GREEN_LED_PIN, HIGH);
-    }
-    else
-    {
-        digitalWrite(GREEN_LED_PIN, LOW);
-    }
+    digitalWrite(RED_LED_PIN, LOW);   
+    digitalWrite(GREEN_LED_PIN, ledState);    
 }
 
 void blinkYellow()
 {
+    int ledState = ledState ? HIGH : LOW;
     digitalWrite(BLUE_LED_PIN, LOW);
-    if (ledState)
-    {
-        digitalWrite(RED_LED_PIN, HIGH);
-        digitalWrite(GREEN_LED_PIN, HIGH);
-    }
-    else
-    {
-        digitalWrite(RED_LED_PIN, LOW);
-        digitalWrite(GREEN_LED_PIN, LOW);
-    }
+    digitalWrite(RED_LED_PIN, ledState);
+    digitalWrite(GREEN_LED_PIN, ledState);    
 }
 
 void turnOffLED()
@@ -199,12 +181,29 @@ void blinkCyanPulse()
     }
 }
 
-const uint8_t colorSequence[][3] = {
+
+void blinkBlue()
+{
+    int ledState = ledState ? HIGH : LOW;
+    digitalWrite(GREEN_LED_PIN, LOW);
+    digitalWrite(RED_LED_PIN, LOW);   
+    digitalWrite(BLUE_LED_PIN, ledState); 
+}
+
+void staticYellow()
+{
+    digitalWrite(BLUE_LED_PIN, LOW);
+    digitalWrite(RED_LED_PIN, HIGH);
+    digitalWrite(GREEN_LED_PIN, HIGH);
+}
+
+static const uint8_t colorSequence[][3] = {
     {0, 255, 255}, // Cyan   (R=0,   G=255, B=255)
     {255, 0, 255}, // Pink   (R=255, G=0,   B=255)
     {255, 255, 0}, // Yellow (R=255, G=255, B=0)
 };
-const int NUM_COLORS = sizeof(colorSequence) / sizeof(colorSequence[0]);
+
+static const int NUM_COLORS = sizeof(colorSequence) / sizeof(colorSequence[0]);
 
 void loopCyanPinkYellowPulse(unsigned long currentTime)
 {
@@ -268,27 +267,6 @@ void loopCyanPinkYellowPulse(unsigned long currentTime)
     }
 }
 
-void blinkBlue()
-{
-    digitalWrite(GREEN_LED_PIN, LOW);
-    digitalWrite(RED_LED_PIN, LOW);
-    if (ledState)
-    {
-        digitalWrite(BLUE_LED_PIN, HIGH);
-    }
-    else
-    {
-        digitalWrite(BLUE_LED_PIN, LOW);
-    }
-}
-
-void staticYellow()
-{
-    digitalWrite(BLUE_LED_PIN, LOW);
-    digitalWrite(RED_LED_PIN, HIGH);
-    digitalWrite(GREEN_LED_PIN, HIGH);
-}
-
 void ledTask(void *parameter)
 {
     setupRGBLED();
@@ -304,7 +282,7 @@ void ledTask(void *parameter)
             lastToggle = currentTime;
         }
 
-         switch (deviceState)
+        switch (deviceState)
         {
         case IDLE:
             setStaticColor(StaticColor::GREEN);
diff --git a/firmware-arduino/src/OTA.cpp b/firmware-arduino/src/OTA.cpp
index 577dc9a..db29b8d 100644
--- a/firmware-arduino/src/OTA.cpp
+++ b/firmware-arduino/src/OTA.cpp
@@ -47,7 +47,7 @@ void markOTAUpdateComplete() {
     if (httpCode > 0) {
         if (httpCode == HTTP_CODE_OK) {
             Serial.println("OTA status updated successfully");
-             setOTAStatusInNVS(OTA_IDLE);
+            setOTAStatusInNVS(OTA_IDLE);
         } else {
             Serial.printf("OTA status update failed with code: %d\n", httpCode);
         }
diff --git a/firmware-arduino/src/OTA.h b/firmware-arduino/src/OTA.h
index 1445e79..5d48d90 100644
--- a/firmware-arduino/src/OTA.h
+++ b/firmware-arduino/src/OTA.h
@@ -1,5 +1,6 @@
 #ifndef OTA_H
 #define OTA_H
+
 #include "Config.h"
 
 extern const char *server_certificate;
diff --git a/firmware-arduino/src/PitchShift.h b/firmware-arduino/src/PitchShift.h
index f3f2d4f..37fd409 100644
--- a/firmware-arduino/src/PitchShift.h
+++ b/firmware-arduino/src/PitchShift.h
@@ -1,4 +1,5 @@
-#pragma once
+#ifndef PITCHSHIFT_H
+#define PITCHSHIFT_H
 
 #include <math.h>
 #include <stdio.h>
@@ -9,7 +10,7 @@
 //pitch shift effect with interpolaion fixed to 1.5 frequency factor, fixed delay, int16_t, 1 channel
 class PitchShiftFixedOutput : public AudioOutput {
 public:
-  PitchShiftFixedOutput(Print &out) { p_out = &out; }
+  explicit PitchShiftFixedOutput(Print &out) { p_out = &out; }
 
   PitchShiftInfo defaultConfig() {
     PitchShiftInfo result;
@@ -41,4 +42,6 @@ protected:
   int16_t pitchShift(int16_t value);
   uint32_t pitchMul;
   unsigned long secondaryOffset;
-};
\ No newline at end of file
+};
+
+#endif
\ No newline at end of file
diff --git a/firmware-arduino/src/WifiManager.cpp b/firmware-arduino/src/WifiManager.cpp
index 04dd774..ccc7ce1 100644
--- a/firmware-arduino/src/WifiManager.cpp
+++ b/firmware-arduino/src/WifiManager.cpp
@@ -205,7 +205,7 @@ void WIFIMANAGER::fallbackToSoftAp(const bool state) {
  * @return true
  * @return false
  */
-bool WIFIMANAGER::getFallbackState() {
+bool WIFIMANAGER::getFallbackState() const {
   return createFallbackAP;
 }
 
@@ -349,7 +349,7 @@ bool WIFIMANAGER::delWifi(String apName) {
  * @return true if one or more SSIDs stored
  * @return false if no configuration is available
  */
-bool WIFIMANAGER::configAvailable() {
+bool WIFIMANAGER::configAvailable() const {
     return configuredSSIDs != 0;
 }
 
diff --git a/firmware-arduino/src/WifiManager.h b/firmware-arduino/src/WifiManager.h
index 41102fc..17b5181 100644
--- a/firmware-arduino/src/WifiManager.h
+++ b/firmware-arduino/src/WifiManager.h
@@ -42,7 +42,7 @@ class WIFIMANAGER {
     String uiPrefix = "/wifi";          // Prefix for all UI endpionts
 
     Preferences preferences;            // Used to store AP credentials to NVS
-    char * NVS;                         // Name used for NVS preferences
+    char* NVS;                         // Name used for NVS preferences
 
     struct apCredentials_t {
       String apName;                    // Name of the AP SSID
@@ -83,7 +83,7 @@ class WIFIMANAGER {
     void fallbackToSoftAp(bool state = true);
 
     // Get the current fallback state
-    bool getFallbackState();
+    bool getFallbackState() const;
 
     // Call to run the Task in the background
     void startBackgroundTask(String apName = "", String apPass = "");
@@ -110,7 +110,7 @@ class WIFIMANAGER {
     bool tryConnect();
 
     // Check if a SSID is stored in the config
-    bool configAvailable();
+    bool configAvailable() const;
 
     // Preconfigure the SoftAP
     void configueSoftAp(String apName = "", String apPass = "");
diff --git a/firmware-arduino/src/main.cpp b/firmware-arduino/src/main.cpp
index f29721c..c1160fe 100644
--- a/firmware-arduino/src/main.cpp
+++ b/firmware-arduino/src/main.cpp
@@ -1,12 +1,7 @@
-#include "OTA.h"
-#include <Arduino.h>
-#include <driver/rtc_io.h>
-#include "LEDHandler.h"
-#include "Config.h"
-#include "SPIFFS.h"
-#include "WifiManager.h"
 #include <driver/touch_sensor.h>
-#include "Button.h"
+#include "OTA.h"
+#include "WifiManager.h"
+#include "LEDHandler.h"
 #include "FactoryReset.h"
 
 #define TOUCH_THRESHOLD 28000
@@ -131,43 +126,43 @@ void setupWiFi()
 }
 
 void touchTask(void* parameter) {
-  touch_pad_init();
-  touch_pad_config(TOUCH_PAD_NUM2);
+    touch_pad_init();
+    touch_pad_config(TOUCH_PAD_NUM2);
 
-  bool touched = false;
-  unsigned long pressStartTime = 0;
-  unsigned long lastTouchTime = 0;
-  const unsigned long LONG_PRESS_DURATION = 500; // 500ms for long press
+    bool touched = false;
+    unsigned long pressStartTime = 0;
+    unsigned long lastTouchTime = 0;
+    const unsigned long LONG_PRESS_DURATION = 500; // 500ms for long press
 
-  while (1) {
-    // Read the touch sensor
-    uint32_t touchValue = touchRead(TOUCH_PAD_NUM2);
-    bool isTouched = (touchValue > TOUCH_THRESHOLD);
-    unsigned long currentTime = millis();
+    while (1) {
+        // Read the touch sensor
+        uint32_t touchValue = touchRead(TOUCH_PAD_NUM2);
+        bool isTouched = (touchValue > TOUCH_THRESHOLD);
+        unsigned long currentTime = millis();
 
-    // Initial touch detection
-    if (isTouched && !touched && (currentTime - lastTouchTime > TOUCH_DEBOUNCE_DELAY)) {
-      touched = true;
-      pressStartTime = currentTime;  // Start timing the press
-      lastTouchTime = currentTime;
+        // Initial touch detection
+        if (isTouched && !touched && (currentTime - lastTouchTime > TOUCH_DEBOUNCE_DELAY)) {
+            touched = true;
+            pressStartTime = currentTime;  // Start timing the press
+            lastTouchTime = currentTime;
+        }
+
+        // Check for long press while touched
+        if (touched && isTouched) {
+            if (currentTime - pressStartTime >= LONG_PRESS_DURATION) {
+                sleepRequested = true;  // Only enter sleep after 500ms of continuous touch
+            }
+        }
+
+        // Release detection
+        if (!isTouched && touched) {
+            touched = false;
+            pressStartTime = 0;  // Reset the press timer
+        }
+
+        vTaskDelay(20);  // Reduced from 50ms to 20ms for better responsiveness
     }
-
-    // Check for long press while touched
-    if (touched && isTouched) {
-      if (currentTime - pressStartTime >= LONG_PRESS_DURATION) {
-        sleepRequested = true;  // Only enter sleep after 500ms of continuous touch
-      }
-    }
-
-    // Release detection
-    if (!isTouched && touched) {
-      touched = false;
-      pressStartTime = 0;  // Reset the press timer
-    }
-
-    vTaskDelay(20);  // Reduced from 50ms to 20ms for better responsiveness
-  }
-  vTaskDelete(NULL);
+    vTaskDelete(NULL);
 }
 
 void setupDeviceMetadata() {