diff --git a/usermods/Temperature/usermod_temperature.h b/usermods/Temperature/usermod_temperature.h
index f7586e444..5b6b21d8c 100644
--- a/usermods/Temperature/usermod_temperature.h
+++ b/usermods/Temperature/usermod_temperature.h
@@ -57,7 +57,10 @@ class UsermodTemperature : public Usermod {
     static const char _parasite[];
     static const char _parasitePin[];
     static const char _domoticzIDX[];
-
+    static const char _sensor[];
+    static const char _temperature[];
+    static const char _Temperature[];
+    
     //Dallas sensor quick (& dirty) reading. Credit to - Author: Peter Scargill, August 17th, 2013
     float readDallas();
     void requestTemperatures();
@@ -191,9 +194,9 @@ void UsermodTemperature::publishHomeAssistantAutodiscovery() {
   sprintf_P(buf, PSTR("%s Temperature"), serverDescription);
   json[F("name")] = buf;
   strcpy(buf, mqttDeviceTopic);
-  strcat_P(buf, PSTR("/temperature"));
+  strcat_P(buf, _Temperature);
   json[F("state_topic")] = buf;
-  json[F("device_class")] = F("temperature");
+  json[F("device_class")] = FPSTR(_temperature);
   json[F("unique_id")] = escapedMac.c_str();
   json[F("unit_of_measurement")] = F("°C");
   payload_size = serializeJson(json, json_str);
@@ -272,7 +275,7 @@ void UsermodTemperature::loop() {
         // dont publish super low temperature as the graph will get messed up
         // the DallasTemperature library returns -127C or -196.6F when problem
         // reading the sensor
-        strcat_P(subuf, PSTR("/temperature"));
+        strcat_P(subuf, _Temperature);
         mqtt->publish(subuf, 0, false, String(getTemperatureC()).c_str());
         strcat_P(subuf, PSTR("_f"));
         mqtt->publish(subuf, 0, false, String(getTemperatureF()).c_str());
@@ -335,9 +338,9 @@ void UsermodTemperature::addToJsonInfo(JsonObject& root) {
   temp.add(getTemperature());
   temp.add(getTemperatureUnit());
 
-  JsonObject sensor = root[F("sensor")];
-  if (sensor.isNull()) sensor = root.createNestedObject(F("sensor"));
-  temp = sensor.createNestedArray(F("temperature"));
+  JsonObject sensor = root[FPSTR(_sensor)];
+  if (sensor.isNull()) sensor = root.createNestedObject(FPSTR(_sensor));
+  temp = sensor.createNestedArray(FPSTR(_temperature));
   temp.add(getTemperature());
   temp.add(getTemperatureUnit());
 }
@@ -367,7 +370,7 @@ void UsermodTemperature::addToConfig(JsonObject &root) {
   JsonObject top = root.createNestedObject(FPSTR(_name)); // usermodname
   top[FPSTR(_enabled)] = enabled;
   top["pin"]  = temperaturePin;     // usermodparam
-  top["degC"] = degC;  // usermodparam
+  top[F("degC")] = degC;  // usermodparam
   top[FPSTR(_readInterval)] = readingInterval / 1000;
   top[FPSTR(_parasite)] = parasite;
   top[FPSTR(_parasitePin)] = parasitePin;
@@ -393,7 +396,7 @@ bool UsermodTemperature::readFromConfig(JsonObject &root) {
 
   enabled           = top[FPSTR(_enabled)] | enabled;
   newTemperaturePin = top["pin"] | newTemperaturePin;
-  degC              = top["degC"] | degC;
+  degC              = top[F("degC")] | degC;
   readingInterval   = top[FPSTR(_readInterval)] | readingInterval/1000;
   readingInterval   = min(120,max(10,(int)readingInterval)) * 1000;  // convert to ms
   parasite          = top[FPSTR(_parasite)] | parasite;
@@ -444,3 +447,6 @@ const char UsermodTemperature::_readInterval[] PROGMEM = "read-interval-s";
 const char UsermodTemperature::_parasite[]     PROGMEM = "parasite-pwr";
 const char UsermodTemperature::_parasitePin[]  PROGMEM = "parasite-pwr-pin";
 const char UsermodTemperature::_domoticzIDX[]  PROGMEM = "domoticz-idx";
+const char UsermodTemperature::_sensor[]       PROGMEM = "sensor";
+const char UsermodTemperature::_temperature[]  PROGMEM = "temperature";
+const char UsermodTemperature::_Temperature[]  PROGMEM = "/temperature";
\ No newline at end of file
diff --git a/usermods/multi_relay/usermod_multi_relay.h b/usermods/multi_relay/usermod_multi_relay.h
index e13cf4775..cb1eec8e1 100644
--- a/usermods/multi_relay/usermod_multi_relay.h
+++ b/usermods/multi_relay/usermod_multi_relay.h
@@ -104,6 +104,9 @@ class MultiRelay : public Usermod {
     static const char _HAautodiscovery[];
     static const char _pcf8574[];
     static const char _pcfAddress[];
+    static const char _switch[];
+    static const char _toggle[];
+    static const char _Command[];
 
     void handleOffTimer();
     void InitHtmlAPIHandle();
@@ -261,7 +264,7 @@ void MultiRelay::handleOffTimer() {
 void MultiRelay::InitHtmlAPIHandle() {  // https://github.com/me-no-dev/ESPAsyncWebServer
   DEBUG_PRINTLN(F("Relays: Initialize HTML API"));
 
-  server.on("/relays", HTTP_GET, [this](AsyncWebServerRequest *request) {
+  server.on(SET_F("/relays"), HTTP_GET, [this](AsyncWebServerRequest *request) {
     DEBUG_PRINTLN(F("Relays: HTML API"));
     String janswer;
     String error = "";
@@ -271,9 +274,9 @@ void MultiRelay::InitHtmlAPIHandle() {  // https://github.com/me-no-dev/ESPAsync
 
     if (getActiveRelayCount()) {
       // Commands
-      if(request->hasParam("switch")) {
+      if (request->hasParam(FPSTR(_switch))) {
         /**** Switch ****/
-        AsyncWebParameter* p = request->getParam("switch");
+        AsyncWebParameter* p = request->getParam(FPSTR(_switch));
         // Get Values
         for (int i=0; i<MULTI_RELAY_MAX_RELAYS; i++) {
           int value = getValue(p->value(), ',', i);
@@ -284,9 +287,9 @@ void MultiRelay::InitHtmlAPIHandle() {  // https://github.com/me-no-dev/ESPAsync
             if (_relay[i].external) switchRelay(i, (bool)value);
           }
         }
-      } else if(request->hasParam("toggle")) {
+      } else if (request->hasParam(FPSTR(_toggle))) {
         /**** Toggle ****/
-        AsyncWebParameter* p = request->getParam("toggle");
+        AsyncWebParameter* p = request->getParam(FPSTR(_toggle));
         // Get Values
         for (int i=0;i<MULTI_RELAY_MAX_RELAYS;i++) {
           int value = getValue(p->value(), ',', i);
@@ -314,7 +317,7 @@ void MultiRelay::InitHtmlAPIHandle() {  // https://github.com/me-no-dev/ESPAsync
     janswer += error;
     janswer += F("\",");
     janswer += F("\"SW Version\":\"");
-    janswer += String(GEOGABVERSION);
+    janswer += String(F(GEOGABVERSION));
     janswer += F("\"}");
     request->send(200, "application/json", janswer);
   });
@@ -420,7 +423,7 @@ uint8_t MultiRelay::getActiveRelayCount() {
  * topic should look like: /relay/X/command; where X is relay number, 0 based
  */
 bool MultiRelay::onMqttMessage(char* topic, char* payload) {
-  if (strlen(topic) > 8 && strncmp_P(topic, PSTR("/relay/"), 7) == 0 && strncmp_P(topic+8, PSTR("/command"), 8) == 0) {
+  if (strlen(topic) > 8 && strncmp_P(topic, PSTR("/relay/"), 7) == 0 && strncmp_P(topic+8, _Command, 8) == 0) {
     uint8_t relay = strtoul(topic+7, NULL, 10);
     if (relay<MULTI_RELAY_MAX_RELAYS) {
       String action = payload;
@@ -430,7 +433,7 @@ bool MultiRelay::onMqttMessage(char* topic, char* payload) {
       } else if (action == "off") {
         if (_relay[relay].external) switchRelay(relay, false);
         return true;
-      } else if (action == "toggle") {
+      } else if (action == FPSTR(_toggle)) {
         if (_relay[relay].external) toggleRelay(relay);
         return true;
       }
@@ -470,7 +473,7 @@ void MultiRelay::publishHomeAssistantAutodiscovery() {
 
       sprintf_P(buf, PSTR("%s/relay/%d"), mqttDeviceTopic, i); //max length: 33 + 7 + 3 = 43
       json["~"] = buf;
-      strcat_P(buf, PSTR("/command"));
+      strcat_P(buf, _Command);
       mqtt->subscribe(buf, 0);
 
       json[F("stat_t")]  = "~";
@@ -675,8 +678,8 @@ void MultiRelay::addToJsonInfo(JsonObject &root) {
       uiDomString += F(",on:");
       uiDomString += _relay[i].state ? "false" : "true";
       uiDomString += F("}});\">");
-      uiDomString += F("<i class=\"icons");
-      uiDomString += _relay[i].state ? F(" on") : F(" off");
+      uiDomString += F("<i class=\"icons ");
+      uiDomString += _relay[i].state ? "on" : "off";
       uiDomString += F("\">&#xe08f;</i></button>");
       infoArr.add(uiDomString);
     }
@@ -836,3 +839,6 @@ const char MultiRelay::_broadcast[]       PROGMEM = "broadcast-sec";
 const char MultiRelay::_HAautodiscovery[] PROGMEM = "HA-autodiscovery";
 const char MultiRelay::_pcf8574[]         PROGMEM = "use-PCF8574";
 const char MultiRelay::_pcfAddress[]      PROGMEM = "PCF8574-address";
+const char MultiRelay::_switch[]          PROGMEM = "switch";
+const char MultiRelay::_toggle[]          PROGMEM = "toggle";
+const char MultiRelay::_Command[]         PROGMEM = "/command";
diff --git a/wled00/fcn_declare.h b/wled00/fcn_declare.h
index 47a8173cc..20ac21129 100644
--- a/wled00/fcn_declare.h
+++ b/wled00/fcn_declare.h
@@ -112,6 +112,10 @@ bool readObjectFromFileUsingId(const char* file, uint16_t id, JsonDocument* dest
 bool readObjectFromFile(const char* file, const char* key, JsonDocument* dest);
 void updateFSInfo();
 void closeFile();
+inline bool writeObjectToFileUsingId(const String &file, uint16_t id, JsonDocument* content) { return writeObjectToFileUsingId(file.c_str(), id, content); };
+inline bool writeObjectToFile(const String &file, const char* key, JsonDocument* content) { return writeObjectToFile(file.c_str(), key, content); };
+inline bool readObjectFromFileUsingId(const String &file, uint16_t id, JsonDocument* dest) { return readObjectFromFileUsingId(file.c_str(), id, dest); };
+inline bool readObjectFromFile(const String &file, const char* key, JsonDocument* dest) { return readObjectFromFile(file.c_str(), key, dest); };
 
 //hue.cpp
 void handleHue();
@@ -225,6 +229,7 @@ void handlePlaylist();
 void serializePlaylist(JsonObject obj);
 
 //presets.cpp
+const char *getPresetsFileName(bool persistent = true);
 void initPresetsFile();
 void handlePresets();
 bool applyPreset(byte index, byte callMode = CALL_MODE_DIRECT_CHANGE);
diff --git a/wled00/file.cpp b/wled00/file.cpp
index 4ae05f0b0..bf90d1f47 100644
--- a/wled00/file.cpp
+++ b/wled00/file.cpp
@@ -416,7 +416,7 @@ static const uint8_t *getPresetCache(size_t &size) {
   }
 
   if (!presetsCached) {
-    File file = WLED_FS.open("/presets.json", "r");
+    File file = WLED_FS.open(FPSTR(getPresetsFileName()), "r");
     if (file) {
       presetsCachedTime = presetsModifiedTime;
       presetsCachedSize = 0;
@@ -446,7 +446,7 @@ bool handleFileRead(AsyncWebServerRequest* request, String path){
     return true;
   }*/
   #if defined(BOARD_HAS_PSRAM) && defined(WLED_USE_PSRAM)
-  if (path.endsWith("/presets.json")) {
+  if (path.endsWith(FPSTR(getPresetsFileName()))) {
     size_t psize;
     const uint8_t *presets = getPresetCache(psize);
     if (presets) {
diff --git a/wled00/ntp.cpp b/wled00/ntp.cpp
index 219a738ff..0b2cf3665 100644
--- a/wled00/ntp.cpp
+++ b/wled00/ntp.cpp
@@ -317,7 +317,8 @@ void getTimeString(char* out)
   sprintf_P(out,PSTR("%i-%i-%i, %02d:%02d:%02d"),year(localTime), month(localTime), day(localTime), hr, minute(localTime), second(localTime));
   if (useAMPM)
   {
-    strcat(out,(hour(localTime) > 11)? " PM":" AM");
+    strcat_P(out,PSTR(" "));
+    strcat(out,(hour(localTime) > 11)? "PM":"AM");
   }
 }
 
diff --git a/wled00/pin_manager.cpp b/wled00/pin_manager.cpp
index b9ec2d2b8..044dc6c92 100644
--- a/wled00/pin_manager.cpp
+++ b/wled00/pin_manager.cpp
@@ -109,7 +109,7 @@ bool PinManagerClass::allocateMultiplePins(const managed_pin_type * mptArray, by
       #ifdef WLED_DEBUG
       DEBUG_PRINT(F("PIN ALLOC: Invalid pin attempted to be allocated: GPIO "));
       DEBUG_PRINT(gpio);
-      DEBUG_PRINT(F(" as ")); DEBUG_PRINT(mptArray[i].isOutput ? "output": "input");
+      DEBUG_PRINT(F(" as ")); DEBUG_PRINT(mptArray[i].isOutput ? F("output"): F("input"));
       DEBUG_PRINTLN(F(""));
       #endif
       shouldFail = true;
diff --git a/wled00/presets.cpp b/wled00/presets.cpp
index 80335ad3b..4897251e7 100644
--- a/wled00/presets.cpp
+++ b/wled00/presets.cpp
@@ -16,13 +16,14 @@ static char quickLoad[9];
 static char saveName[33];
 static bool includeBri = true, segBounds = true, selectedOnly = false, playlistSave = false;;
 
-static const char *getFileName(bool persist = true) {
-  return persist ? "/presets.json" : "/tmp.json";
+static const char presets_json[] PROGMEM = "/presets.json";
+static const char tmp_json[] PROGMEM = "/tmp.json";
+const char *getPresetsFileName(bool persistent) {
+  return persistent ? presets_json : tmp_json;
 }
 
 static void doSaveState() {
   bool persist = (presetToSave < 251);
-  const char *filename = getFileName(persist);
 
   unsigned long start = millis();
   while (strip.isUpdating() && millis()-start < (2*FRAMETIME_FIXED)+1) yield(); // wait 2 frames
@@ -63,11 +64,11 @@ static void doSaveState() {
     if (tmpRAMbuffer!=nullptr) {
       serializeJson(*fileDoc, tmpRAMbuffer, len);
     } else {
-      writeObjectToFileUsingId(filename, presetToSave, fileDoc);
+      writeObjectToFileUsingId(FPSTR(getPresetsFileName(persist)), presetToSave, fileDoc);
     }
   } else
   #endif
-  writeObjectToFileUsingId(filename, presetToSave, fileDoc);
+  writeObjectToFileUsingId(FPSTR(getPresetsFileName(persist)), presetToSave, fileDoc);
 
   if (persist) presetsModifiedTime = toki.second(); //unix time
   releaseJSONBufferLock();
@@ -85,8 +86,7 @@ bool getPresetName(byte index, String& name)
 {
   if (!requestJSONBufferLock(19)) return false;
   bool presetExists = false;
-  if (readObjectFromFileUsingId(getFileName(), index, pDoc))
-  {
+  if (readObjectFromFileUsingId(FPSTR(getPresetsFileName()), index, pDoc)) {
     JsonObject fdo = pDoc->as<JsonObject>();
     if (fdo["n"]) {
       name = (const char*)(fdo["n"]);
@@ -99,12 +99,12 @@ bool getPresetName(byte index, String& name)
 
 void initPresetsFile()
 {
-  if (WLED_FS.exists(getFileName())) return;
+  if (WLED_FS.exists(FPSTR(getPresetsFileName()))) return;
 
   StaticJsonDocument<64> doc;
   JsonObject sObj = doc.to<JsonObject>();
   sObj.createNestedObject("0");
-  File f = WLED_FS.open(getFileName(), "w");
+  File f = WLED_FS.open(FPSTR(getPresetsFileName()), "w");
   if (!f) {
     errorFlag = ERR_FS_GENERAL;
     return;
@@ -147,7 +147,6 @@ void handlePresets()
   uint8_t tmpMode   = callModeToApply;
 
   JsonObject fdo;
-  const char *filename = getFileName(tmpPreset < 255);
 
   // allocate buffer
   if (!requestJSONBufferLock(9)) return;  // will also assign fileDoc
@@ -165,7 +164,7 @@ void handlePresets()
   } else
   #endif
   {
-  errorFlag = readObjectFromFileUsingId(filename, tmpPreset, fileDoc) ? ERR_NONE : ERR_FS_PLOAD;
+  errorFlag = readObjectFromFileUsingId(FPSTR(getPresetsFileName(tmpPreset < 255)), tmpPreset, fileDoc) ? ERR_NONE : ERR_FS_PLOAD;
   }
   fdo = fileDoc->as<JsonObject>();
 
@@ -234,7 +233,7 @@ void savePreset(byte index, const char* pname, JsonObject sObj)
       sObj.remove(F("psave"));
       if (sObj["n"].isNull()) sObj["n"] = saveName;
       initPresetsFile(); // just in case if someone deleted presets.json using /edit
-      writeObjectToFileUsingId(getFileName(index<255), index, fileDoc);
+      writeObjectToFileUsingId(FPSTR(getPresetsFileName()), index, fileDoc);
       presetsModifiedTime = toki.second(); //unix time
       updateFSInfo();
     } else {
@@ -248,7 +247,7 @@ void savePreset(byte index, const char* pname, JsonObject sObj)
 
 void deletePreset(byte index) {
   StaticJsonDocument<24> empty;
-  writeObjectToFileUsingId(getFileName(), index, &empty);
+  writeObjectToFileUsingId(FPSTR(getPresetsFileName()), index, &empty);
   presetsModifiedTime = toki.second(); //unix time
   updateFSInfo();
 }
\ No newline at end of file
diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index 3c5669215..fc1b9f5ce 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -328,7 +328,7 @@ void WLED::setup()
   DEBUG_PRINTLN();
   DEBUG_PRINT(F("---WLED "));
   DEBUG_PRINT(versionString);
-  DEBUG_PRINT(" ");
+  DEBUG_PRINT(F(" "));
   DEBUG_PRINT(VERSION);
   DEBUG_PRINTLN(F(" INIT---"));
 #ifdef ARDUINO_ARCH_ESP32
diff --git a/wled00/wled.h b/wled00/wled.h
index 571d4f54b..2c619a9fd 100755
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2402170
+#define VERSION 2402250
 
 //uncomment this if you have a "my_config.h" file you'd like to use
 //#define WLED_USE_MY_CONFIG
diff --git a/wled00/wled_eeprom.cpp b/wled00/wled_eeprom.cpp
index 89e5d65c4..4f2c14d47 100755
--- a/wled00/wled_eeprom.cpp
+++ b/wled00/wled_eeprom.cpp
@@ -365,7 +365,7 @@ void applyMacro(byte index) {
 
 // De-EEPROM routine, upgrade from previous versions to v0.11
 void deEEP() {
-  if (WLED_FS.exists("/presets.json")) return;
+  if (WLED_FS.exists(FPSTR(getPresetsFileName()))) return;
 
   DEBUG_PRINTLN(F("Preset file not found, attempting to load from EEPROM"));
   DEBUGFS_PRINTLN(F("Allocating saving buffer for dEEP"));
@@ -442,7 +442,7 @@ void deEEP() {
 
   EEPROM.end();
 
-  File f = WLED_FS.open("/presets.json", "w");
+  File f = WLED_FS.open(FPSTR(getPresetsFileName()), "w");
   if (!f) {
     errorFlag = ERR_FS_GENERAL;
     releaseJSONBufferLock();
diff --git a/wled00/wled_server.cpp b/wled00/wled_server.cpp
index 9fdaa20b5..a1ba28159 100644
--- a/wled00/wled_server.cpp
+++ b/wled00/wled_server.cpp
@@ -170,7 +170,7 @@ static void handleUpload(AsyncWebServerRequest *request, const String& filename,
     request->_tempFile = WLED_FS.open(finalname, "w");
     DEBUG_PRINT(F("Uploading "));
     DEBUG_PRINTLN(finalname);
-    if (finalname.equals(F("/presets.json"))) presetsModifiedTime = toki.second();
+    if (finalname.equals(FPSTR(getPresetsFileName()))) presetsModifiedTime = toki.second();
   }
   if (len) {
     request->_tempFile.write(data,len);
@@ -249,17 +249,19 @@ void initServer()
   });
 
   // "/settings/settings.js&p=x" request also handled by serveSettings()
-
-  server.on(SET_F("/style.css"), HTTP_GET, [](AsyncWebServerRequest *request) {
-    handleStaticContent(request, F("/style.css"), 200, FPSTR(s_css), PAGE_settingsCss, PAGE_settingsCss_length);
+  static const char _style_css[] PROGMEM = "/style.css";
+  server.on(_style_css, HTTP_GET, [](AsyncWebServerRequest *request) {
+    handleStaticContent(request, FPSTR(_style_css), 200, FPSTR(s_css), PAGE_settingsCss, PAGE_settingsCss_length);
   });
 
-  server.on(SET_F("/favicon.ico"), HTTP_GET, [](AsyncWebServerRequest *request) {
-    handleStaticContent(request, F("/favicon.ico"), 200, F("image/x-icon"), favicon, favicon_length, false);
+  static const char _favicon_ico[] PROGMEM = "/favicon.ico";
+  server.on(_favicon_ico, HTTP_GET, [](AsyncWebServerRequest *request) {
+    handleStaticContent(request, FPSTR(_favicon_ico), 200, F("image/x-icon"), favicon, favicon_length, false);
   });
 
-  server.on(SET_F("/skin.css"), HTTP_GET, [](AsyncWebServerRequest *request) {
-    if (handleFileRead(request, F("/skin.css"))) return;
+  static const char _skin_css[] PROGMEM = "/skin.css";
+  server.on(_skin_css, HTTP_GET, [](AsyncWebServerRequest *request) {
+    if (handleFileRead(request, FPSTR(_skin_css))) return;
     AsyncWebServerResponse *response = request->beginResponse(200, FPSTR(s_css));
     request->send(response);
   });
@@ -363,15 +365,17 @@ void initServer()
   createEditHandler(correctPIN);
 
 #ifndef WLED_DISABLE_OTA
+  static const char _update[] PROGMEM = "/update";
+
   //init ota page
-  server.on(SET_F("/update"), HTTP_GET, [](AsyncWebServerRequest *request){
+  server.on(_update, HTTP_GET, [](AsyncWebServerRequest *request){
     if (otaLock) {
       serveMessage(request, 401, FPSTR(s_accessdenied), FPSTR(s_unlock_ota), 254);
     } else
       serveSettings(request); // checks for "upd" in URL and handles PIN
   });
 
-  server.on(SET_F("/update"), HTTP_POST, [](AsyncWebServerRequest *request){
+  server.on(_update, HTTP_POST, [](AsyncWebServerRequest *request){
     if (!correctPIN) {
       serveSettings(request, true); // handle PIN page POST request
       return;
@@ -417,7 +421,7 @@ void initServer()
     }
   });
 #else
-  server.on(SET_F("/update"), HTTP_GET, [](AsyncWebServerRequest *request){
+  server.on(_update, HTTP_GET, [](AsyncWebServerRequest *request){
     serveMessage(request, 501, FPSTR(s_notimplemented), F("OTA updating is disabled in this build."), 254);
   });
 #endif
@@ -443,19 +447,22 @@ void initServer()
   });
 
 #ifdef WLED_ENABLE_PIXART
-  server.on(SET_F("/pixart.htm"), HTTP_GET, [](AsyncWebServerRequest *request) {
-    handleStaticContent(request, F("/pixart.htm"), 200, FPSTR(s_html), PAGE_pixart, PAGE_pixart_L);
+  static const char _pixart_htm[] PROGMEM = "/pixart.htm";
+  server.on(_pixart_htm, HTTP_GET, [](AsyncWebServerRequest *request) {
+    handleStaticContent(request, FPSTR(_pixart_htm), 200, FPSTR(s_html), PAGE_pixart, PAGE_pixart_L);
   });
 #endif
 
 #ifndef WLED_DISABLE_PXMAGIC
-  server.on(SET_F("/pxmagic.htm"), HTTP_GET, [](AsyncWebServerRequest *request) {
-    handleStaticContent(request, F("/pxmagic.htm"), 200, FPSTR(s_html), PAGE_pxmagic, PAGE_pxmagic_L);
+  static const char _pxmagic_htm[] PROGMEM = "/pxmagic.htm";
+  server.on(_pxmagic_htm, HTTP_GET, [](AsyncWebServerRequest *request) {
+    handleStaticContent(request, FPSTR(_pxmagic_htm), 200, FPSTR(s_html), PAGE_pxmagic, PAGE_pxmagic_L);
   });
 #endif
 
-  server.on(SET_F("/cpal.htm"), HTTP_GET, [](AsyncWebServerRequest *request) {
-    handleStaticContent(request, F("/cpal.htm"), 200, FPSTR(s_html), PAGE_cpal, PAGE_cpal_L);
+  static const char _cpal_htm[] PROGMEM = "/cpal.htm";
+  server.on(_cpal_htm, HTTP_GET, [](AsyncWebServerRequest *request) {
+    handleStaticContent(request, FPSTR(_cpal_htm), 200, FPSTR(s_html), PAGE_cpal, PAGE_cpal_L);
   });
 
 #ifdef WLED_ENABLE_WEBSOCKETS