diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index 2b45d37a..ce5bdc73 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -4763,7 +4763,7 @@ class AuroraWave {
       alive = true;
     }
 
-    CRGB getColorForLED(int ledIndex) {
+    CRGB getColorForLED(int ledIndex) const {
       if(ledIndex < center - width || ledIndex > center + width) return 0; //Position out of range of this wave
 
       CRGB rgb;
@@ -4818,7 +4818,7 @@ class AuroraWave {
       }
     };
 
-    bool stillAlive() {
+    bool stillAlive() const {
       return alive;
     };
 };
diff --git a/wled00/FX.h b/wled00/FX.h
index c0693462..7f53202d 100644
--- a/wled00/FX.h
+++ b/wled00/FX.h
@@ -420,7 +420,7 @@ typedef struct Segment {
     };
     size_t _dataLen;                   // WLEDMM uint16_t is too small
     static size_t _usedSegmentData;    // WLEDMM uint16_t is too small
-    void setPixelColorXY_fast(int x, int y,uint32_t c, uint32_t scaled_col, int cols, int rows); // set relative pixel within segment with color - faster, but no error checking!!!
+    void setPixelColorXY_fast(int x, int y,uint32_t c, uint32_t scaled_col, int cols, int rows) const; // set relative pixel within segment with color - faster, but no error checking!!!
 
     bool _isSimpleSegment = false;      // simple = no grouping or spacing - mirror, transpose or reverse allowed
     bool _isSuperSimpleSegment = false; // superSimple = no grouping or spacing, no mirror - only transpose or reverse allowed
@@ -606,7 +606,7 @@ typedef struct Segment {
     // transition functions
     void     startTransition(uint16_t dur); // transition has to start before actual segment values change
     void     handleTransition(void);
-    uint16_t progress(void); //transition progression between 0-65535
+    uint16_t progress(void) const; //transition progression between 0-65535
 
     // WLEDMM method inlined for speed (its called at each setPixelColor)
     inline uint8_t  currentBri(uint8_t briNew, bool useCct = false) {
@@ -621,7 +621,7 @@ typedef struct Segment {
 
     uint8_t  currentMode(uint8_t modeNew);
     uint32_t currentColor(uint8_t slot, uint32_t colorNew);
-    CRGBPalette16 &loadPalette(CRGBPalette16 &tgt, uint8_t pal);
+    CRGBPalette16 &loadPalette(CRGBPalette16 &tgt, uint8_t pal) const;
     void     setCurrentPalette(void);
 
     // 1D strip
diff --git a/wled00/FX_2Dfcn.cpp b/wled00/FX_2Dfcn.cpp
index f6d2bc0b..6f7f97b2 100644
--- a/wled00/FX_2Dfcn.cpp
+++ b/wled00/FX_2Dfcn.cpp
@@ -272,7 +272,7 @@ void Segment::startFrame(void) {
 
 // Simplified version of Segment::setPixelColorXY - without error checking. Does not support grouping or spacing
 // * expects scaled color (final brightness) as additional input parameter, plus segment  virtualWidth() and virtualHeight()
-void IRAM_ATTR __attribute__((hot)) Segment::setPixelColorXY_fast(int x, int y, uint32_t col, uint32_t scaled_col, int cols, int rows) //WLEDMM
+void IRAM_ATTR __attribute__((hot)) Segment::setPixelColorXY_fast(int x, int y, uint32_t col, uint32_t scaled_col, int cols, int rows) const //WLEDMM
 {
   unsigned i = UINT_MAX;
   bool sameColor = false;
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index f98f5dcb..1c577946 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -311,7 +311,7 @@ void Segment::setUpLeds() {
   }
 }
 
-CRGBPalette16 &Segment::loadPalette(CRGBPalette16 &targetPalette, uint8_t pal) {
+CRGBPalette16 &Segment::loadPalette(CRGBPalette16 &targetPalette, uint8_t pal) const {
   static unsigned long _lastPaletteChange = millis() - 990000; // perhaps it should be per segment //WLEDMM changed init value to avoid pure orange after startup
   static CRGBPalette16 randomPalette = CRGBPalette16(DEFAULT_COLOR);
   static CRGBPalette16 prevRandomPalette = CRGBPalette16(CRGB(BLACK));
@@ -452,7 +452,7 @@ void Segment::startTransition(uint16_t dur) {
 }
 
 // transition progression between 0-65535
-uint16_t IRAM_ATTR_YN Segment::progress() {
+uint16_t IRAM_ATTR_YN Segment::progress() const {
   if (!transitional || !_t) return 0xFFFFU;
   unsigned long timeNow = millis();
   if (timeNow - _t->_start > _t->_dur || _t->_dur == 0) return 0xFFFFU;