diff --git a/usermods/SN_Photoresistor/usermod_sn_photoresistor.h b/usermods/SN_Photoresistor/usermod_sn_photoresistor.h
index 6a7e9f5a..9c3be7cc 100644
--- a/usermods/SN_Photoresistor/usermod_sn_photoresistor.h
+++ b/usermods/SN_Photoresistor/usermod_sn_photoresistor.h
@@ -22,12 +22,12 @@
 
 // 10 bits
 #ifndef USERMOD_SN_PHOTORESISTOR_ADC_PRECISION
-#define USERMOD_SN_PHOTORESISTOR_ADC_PRECISION 1024.0
+#define USERMOD_SN_PHOTORESISTOR_ADC_PRECISION 1024.0f
 #endif
 
 // resistor size 10K hms
 #ifndef USERMOD_SN_PHOTORESISTOR_RESISTOR_VALUE
-#define USERMOD_SN_PHOTORESISTOR_RESISTOR_VALUE 10000.0
+#define USERMOD_SN_PHOTORESISTOR_RESISTOR_VALUE 10000.0f
 #endif
 
 // only report if differance grater than offset value
diff --git a/usermods/battery_status_basic/usermod_v2_battery_status_basic.h b/usermods/battery_status_basic/usermod_v2_battery_status_basic.h
index ab9cba3b..cb3c0867 100644
--- a/usermods/battery_status_basic/usermod_v2_battery_status_basic.h
+++ b/usermods/battery_status_basic/usermod_v2_battery_status_basic.h
@@ -21,10 +21,10 @@
 #ifndef USERMOD_BATTERY_ADC_PRECISION
   #ifdef ARDUINO_ARCH_ESP32
     // 12 bits
-    #define USERMOD_BATTERY_ADC_PRECISION 4095.0
+    #define USERMOD_BATTERY_ADC_PRECISION 4095.0f
   #else
     // 10 bits
-    #define USERMOD_BATTERY_ADC_PRECISION 1024.0
+    #define USERMOD_BATTERY_ADC_PRECISION 1024.0f
   #endif
 #endif
 
@@ -39,11 +39,11 @@
 // https://batterybro.com/blogs/18650-wholesale-battery-reviews/18852515-when-to-recycle-18650-batteries-and-how-to-start-a-collection-center-in-your-vape-shop
 // Discharge voltage: 2.5 volt + .1 for personal safety
 #ifndef USERMOD_BATTERY_MIN_VOLTAGE
-  #define USERMOD_BATTERY_MIN_VOLTAGE 2.6
+  #define USERMOD_BATTERY_MIN_VOLTAGE 2.6f
 #endif
 
 #ifndef USERMOD_BATTERY_MAX_VOLTAGE
-  #define USERMOD_BATTERY_MAX_VOLTAGE 4.2
+  #define USERMOD_BATTERY_MAX_VOLTAGE 4.2f
 #endif
 
 class UsermodBatteryBasic : public Usermod 
diff --git a/usermods/multi_relay/usermod_multi_relay.h b/usermods/multi_relay/usermod_multi_relay.h
index 23dcc1e2..6143a6b9 100644
--- a/usermods/multi_relay/usermod_multi_relay.h
+++ b/usermods/multi_relay/usermod_multi_relay.h
@@ -272,7 +272,7 @@ class MultiRelay : public Usermod {
 
     void publishHomeAssistantAutodiscovery() {
       for (uint8_t i = 0; i < MULTI_RELAY_MAX_RELAYS; i++) {
-        char uid[16], json_str[1024], buf[128];
+        char uid[24], json_str[1024], buf[128];
         size_t payload_size;
         sprintf_P(uid, PSTR("%s_sw%d"), escapedMac.c_str(), i);
 
diff --git a/wled00/FX.h b/wled00/FX.h
index 4d553b0f..2eee69db 100644
--- a/wled00/FX.h
+++ b/wled00/FX.h
@@ -81,7 +81,6 @@
 #define SEGLEN           _virtualSegmentLength
 #define SEGACT           SEGMENT.stop
 #define SPEED_FORMULA_L  5U + (50U*(255U - SEGMENT.speed))/SEGLEN
-#define RESET_RUNTIME    memset(_segment_runtimes, 0, sizeof(_segment_runtimes))
 
 // some common colors
 #define RED        (uint32_t)0xFF0000
@@ -410,8 +409,9 @@ class WS2812FX {
        * Flags that before the next effect is calculated,
        * the internal segment state should be reset. 
        * Call resetIfRequired before calling the next effect function.
+       * Safe to call from interrupts and network requests.
        */
-      inline void reset() { _requiresReset = true; }
+      inline void markForReset() { _requiresReset = true; }
       private:
         uint16_t _dataLen = 0;
         bool _requiresReset = false;
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 2fbbb79a..391ad01c 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -67,7 +67,12 @@
 //do not call this method from system context (network callback)
 void WS2812FX::finalizeInit(void)
 {
-  RESET_RUNTIME;
+  //reset segment runtimes
+  for (uint8_t i = 0; i < MAX_NUM_SEGMENTS; i++) {
+    _segment_runtimes[i].markForReset();
+    _segment_runtimes[i].resetIfRequired();
+  }
+
   _hasWhiteChannel = _isOffRefreshRequired = false;
 
   //if busses failed to load, add default (fresh install, FS issue, ...)
@@ -373,7 +378,7 @@ void WS2812FX::setMode(uint8_t segid, uint8_t m) {
 
   if (_segments[segid].mode != m) 
   {
-    _segment_runtimes[segid].reset();
+    _segment_runtimes[segid].markForReset();
     _segments[segid].mode = m;
   }
 }
@@ -643,12 +648,12 @@ void WS2812FX::setSegment(uint8_t n, uint16_t i1, uint16_t i2, uint8_t grouping,
     seg.spacing = spacing;
   }
 	if (offset < UINT16_MAX) seg.offset = offset;
-  _segment_runtimes[n].reset();
+  _segment_runtimes[n].markForReset();
 }
 
 void WS2812FX::restartRuntime() {
   for (uint8_t i = 0; i < MAX_NUM_SEGMENTS; i++) {
-    _segment_runtimes[i].reset();
+    _segment_runtimes[i].markForReset();
   }
 }
 
@@ -679,9 +684,9 @@ void WS2812FX::resetSegments() {
     _segments[i].cct = 127;
     _segments[i].speed = DEFAULT_SPEED;
     _segments[i].intensity = DEFAULT_INTENSITY;
-    _segment_runtimes[i].reset();
+    _segment_runtimes[i].markForReset();
   }
-  _segment_runtimes[0].reset();
+  _segment_runtimes[0].markForReset();
 }
 
 void WS2812FX::makeAutoSegments() {
diff --git a/wled00/button.cpp b/wled00/button.cpp
index 86a78981..ccbe3197 100644
--- a/wled00/button.cpp
+++ b/wled00/button.cpp
@@ -72,21 +72,23 @@ void doublePressAction(uint8_t b)
 bool isButtonPressed(uint8_t i)
 {
   if (btnPin[i]<0) return false;
+  uint8_t pin = btnPin[i];
+
   switch (buttonType[i]) {
     case BTN_TYPE_NONE:
     case BTN_TYPE_RESERVED:
       break;
     case BTN_TYPE_PUSH:
     case BTN_TYPE_SWITCH:
-      if (digitalRead(btnPin[i]) == LOW) return true;
+      if (digitalRead(pin) == LOW) return true;
       break;
     case BTN_TYPE_PUSH_ACT_HIGH:
     case BTN_TYPE_PIR_SENSOR:
-      if (digitalRead(btnPin[i]) == HIGH) return true;
+      if (digitalRead(pin) == HIGH) return true;
       break;
     case BTN_TYPE_TOUCH:
       #if defined(ARDUINO_ARCH_ESP32) && !defined(CONFIG_IDF_TARGET_ESP32C3)
-      if (touchRead(btnPin[i]) <= touchThreshold) return true;
+      if (touchRead(pin) <= touchThreshold) return true;
       #endif
       break;
   }
@@ -320,4 +322,4 @@ void handleIO()
     }
     offMode = true;
   }
-}
+}
\ No newline at end of file
diff --git a/wled00/ir.cpp b/wled00/ir.cpp
index 9089288d..c8f526c9 100644
--- a/wled00/ir.cpp
+++ b/wled00/ir.cpp
@@ -254,6 +254,7 @@ void decodeIR(uint32_t code)
   }
   lastValidCode = 0; irTimesRepeated = 0;
   //if (decodeIRCustom(code)) return;
+  lastRepeatableAction = ACTION_NONE;
   if (irEnabled == 8) { // any remote configurable with ir.json file
     decodeIRJson(code);
     colorUpdated(CALL_MODE_BUTTON);
@@ -289,7 +290,7 @@ void decodeIR(uint32_t code)
 }
 
 void applyRepeatActions()
-{  
+{
   if (irEnabled == 8) {
     decodeIRJson(lastValidCode);
     return;
@@ -302,7 +303,6 @@ void applyRepeatActions()
     case ACTION_INTENSITY_DOWN : changeEffectIntensity(lastRepeatableValue); colorUpdated(CALL_MODE_BUTTON); return;
     default: break;
   }
-
   if (lastValidCode == IR40_WPLUS) { 
     relativeChangeWhite(10);
     colorUpdated(CALL_MODE_BUTTON);
diff --git a/wled00/wled_math.cpp b/wled00/wled_math.cpp
index d9af4162..17d80e4f 100644
--- a/wled00/wled_math.cpp
+++ b/wled00/wled_math.cpp
@@ -77,37 +77,41 @@ float asin_t(float x) {
   return res;
 }
 
-
-//https://stackoverflow.com/a/42542593
-#define A 0.0776509570923569
-#define B -0.287434475393028
-#define C ((HALF_PI/2) - A - B)
-
-//polynominal factors for approximation between 1 and 5
-#define C0 0.089494f
-#define C1 0.974207f
-#define C2 -0.326175f
-#define C3 0.05375f
-#define C4 -0.003445f
-
+// declare a template with no implementation, and only one specialization
+// this allows hiding the constants, while ensuring ODR causes optimizations
+// to still apply.  (Fixes issues with conflicting 3rd party #define's)
+template <typename T> T atan_t(T x);
+template<>
 float atan_t(float x) {
-  bool neg = (x < 0);
+  //For A/B/C, see https://stackoverflow.com/a/42542593
+  static const double A { 0.0776509570923569 };
+  static const double B { -0.287434475393028 };
+  static const double C { ((HALF_PI/2) - A - B) };
+  // polynominal factors for approximation between 1 and 5
+  static const float C0 {  0.089494f };
+  static const float C1 {  0.974207f };
+  static const float C2 { -0.326175f };
+  static const float C3 {  0.05375f  };
+  static const float C4 { -0.003445f };
+
   #ifdef WLED_DEBUG_MATH
   float xinput = x;
   #endif
+  bool neg = (x < 0);
   x = std::abs(x);
   float res;
-  if (x > 5.0f) { //atan(x) converges to pi/2 - (1/x) for large values
+  if (x > 5.0f) { // atan(x) converges to pi/2 - (1/x) for large values
     res = HALF_PI - (1.0f/x);
-  }
-  else if (x > 1.0f) { //1 < x < 5
+  } else if (x > 1.0f) { //1 < x < 5
     float xx = x * x;
     res = (C4*xx*xx)+(C3*xx*x)+(C2*xx)+(C1*x)+C0;
-  } else { //this approximation is only for x <= 1
+  } else { // this approximation is only for x <= 1
     float xx = x * x;
     res = ((A*xx + B)*xx + C)*x;
   }
-  if (neg) res = -res;
+  if (neg) {
+    res = -res;
+  }
   #ifdef WLED_DEBUG_MATH
   Serial.printf("atan: %f,%f,%f,(%f)\n",xinput,res,atan(xinput),res-atan(xinput));
   #endif
diff --git a/wled00/wled_serial.cpp b/wled00/wled_serial.cpp
index e751b0ee..10083318 100644
--- a/wled00/wled_serial.cpp
+++ b/wled00/wled_serial.cpp
@@ -46,8 +46,6 @@ void handleSerial()
   static byte red   = 0x00;
   static byte green = 0x00;
 
-  uint16_t nBytes = 0;
-  
   while (Serial.available() > 0)
   {
     yield();