diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56c722e22..a989eaf32 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ### Builds after release 0.12.0
 
+#### Build 2105230
+
+-   No longer retain MQTT `/v` topic to alleviate storage loads on MQTT broker
+-   Fixed Sunrise calculation (atan_t approx. used outside of value range)
+
 #### Build 2105200
 
 -   Fixed WS281x output on ESP32
diff --git a/platformio.ini b/platformio.ini
index f57c4cc73..d5c936f18 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -473,3 +473,37 @@ platform_packages = ${common.platform_packages}
 board_build.ldscript = ${common.ldscript_4m1m}
 build_unflags = ${common.build_unflags}
 build_flags = ${common.build_flags_esp8266}
+
+# ------------------------------------------------------------------------------
+# EleksTube-IPS
+# ------------------------------------------------------------------------------
+[env:elekstube_ips]
+board = esp32dev
+platform = espressif32@3.2
+upload_speed = 921600
+lib_deps = ${env.lib_deps}
+  TFT_eSPI
+build_flags = ${common.build_flags_esp32} -D WLED_DISABLE_BROWNOUT_DET -D WLED_DISABLE_INFRARED
+  -D USERMOD_RTC
+  -D USERMOD_ELEKSTUBE_IPS
+  -D LEDPIN=12
+  -D RLYPIN=27
+  -D BTNPIN=34
+  -D WLED_DISABLE_INFRARED
+  -D DEFAULT_LED_COUNT=6
+  # Display config
+  -D ST7789_DRIVER
+  -D TFT_WIDTH=135
+  -D TFT_HEIGHT=240
+  -D CGRAM_OFFSET
+  -D TFT_SDA_READ
+  -D TFT_MOSI=23
+  -D TFT_SCLK=18
+  -D TFT_DC=25
+  -D TFT_RST=26
+  -D SPI_FREQUENCY=40000000
+  -D USER_SETUP_LOADED
+monitor_filters = esp32_exception_decoder
+lib_ignore =
+  ESPAsyncTCP
+  ESPAsyncUDP
diff --git a/usermods/EleksTube_IPS/ChipSelect.h b/usermods/EleksTube_IPS/ChipSelect.h
new file mode 100644
index 000000000..c58b28549
--- /dev/null
+++ b/usermods/EleksTube_IPS/ChipSelect.h
@@ -0,0 +1,70 @@
+#ifndef CHIP_SELECT_H
+#define CHIP_SELECT_H
+
+#include "Hardware.h"
+
+/*
+ * `digit`s are as defined in Hardware.h, 0 == seconds ones, 5 == hours tens.
+ */
+
+class ChipSelect {
+private:
+  uint8_t digits_map;
+  const uint8_t all_on = 0x3F;
+  const uint8_t all_off = 0x00;
+public:
+  ChipSelect() : digits_map(all_off) {}
+  
+  void update() {
+    // Documented in README.md.  Q7 and Q6 are unused. Q5 is Seconds Ones, Q0 is Hours Tens.
+    // Q7 is the first bit written, Q0 is the last.  So we push two dummy bits, then start with
+    // Seconds Ones and end with Hours Tens.
+    // CS is Active Low, but digits_map is 1 for enable, 0 for disable.  So we bit-wise NOT first.
+
+    uint8_t to_shift = (~digits_map) << 2;
+
+    digitalWrite(CSSR_LATCH_PIN, LOW);
+    shiftOut(CSSR_DATA_PIN, CSSR_CLOCK_PIN, LSBFIRST, to_shift);
+    digitalWrite(CSSR_LATCH_PIN, HIGH);
+  }
+
+    void begin() 
+  {
+    pinMode(CSSR_LATCH_PIN, OUTPUT);
+    pinMode(CSSR_DATA_PIN, OUTPUT);
+    pinMode(CSSR_CLOCK_PIN, OUTPUT);
+
+    digitalWrite(CSSR_DATA_PIN, LOW);
+    digitalWrite(CSSR_CLOCK_PIN, LOW);
+    digitalWrite(CSSR_LATCH_PIN, LOW);
+    update();
+  }
+
+  // These speak the indexes defined in Hardware.h.
+  // So 0 is disabled, 1 is enabled (even though CS is active low, this gets mapped.)
+  // So bit 0 (LSB), is index 0, is SECONDS_ONES
+  // Translation to what the 74HC595 uses is done in update()
+  void setDigitMap(uint8_t map, bool update_=true)   { digits_map = map; if (update_) update(); }
+  uint8_t getDigitMap()                        { return digits_map; }
+
+  // Helper functions
+  // Sets just the one digit by digit number
+  void setDigit(uint8_t digit, bool update_=true) { setDigitMap(0x01 << digit, update_); }
+  void setAll(bool update_=true)                  { setDigitMap(all_on,  update_); }
+  void clear(bool update_=true)                   { setDigitMap(all_off, update_); }
+  void setSecondsOnes()                           { setDigit(SECONDS_ONES); }
+  void setSecondsTens()                           { setDigit(SECONDS_TENS); }
+  void setMinutesOnes()                           { setDigit(MINUTES_ONES); }
+  void setMinutesTens()                           { setDigit(MINUTES_TENS); }
+  void setHoursOnes()                             { setDigit(HOURS_ONES); }
+  void setHoursTens()                             { setDigit(HOURS_TENS); }
+  bool isSecondsOnes()                            { return (digits_map&SECONDS_ONES_MAP > 0); }
+  bool isSecondsTens()                            { return (digits_map&SECONDS_TENS_MAP > 0); }
+  bool isMinutesOnes()                            { return (digits_map&MINUTES_ONES_MAP > 0); }
+  bool isMinutesTens()                            { return (digits_map&MINUTES_TENS_MAP > 0); }
+  bool isHoursOnes()                              { return (digits_map&HOURS_ONES_MAP > 0); }
+  bool isHoursTens()                              { return (digits_map&HOURS_TENS_MAP > 0); }
+};
+
+
+#endif // CHIP_SELECT_H
diff --git a/usermods/EleksTube_IPS/Hardware.h b/usermods/EleksTube_IPS/Hardware.h
new file mode 100644
index 000000000..e4f793053
--- /dev/null
+++ b/usermods/EleksTube_IPS/Hardware.h
@@ -0,0 +1,52 @@
+/*
+ * Define the hardware for the EleksTube IPS clock.  Mostly pin definitions
+ */
+#ifndef ELEKSTUBEHAX_HARDWARE_H
+#define ELEKSTUBEHAX_HARDWARE_H
+
+#include <stdint.h> 
+#include <Arduino.h> // for HIGH and LOW
+
+// Common indexing scheme, used to identify the digit
+#define SECONDS_ONES (0)
+#define SECONDS_TENS (1)
+#define MINUTES_ONES (2)
+#define MINUTES_TENS (3)
+#define HOURS_ONES   (4)
+#define HOURS_TENS   (5)
+#define NUM_DIGITS   (6)
+
+#define SECONDS_ONES_MAP (0x01 << SECONDS_ONES)
+#define SECONDS_TENS_MAP (0x01 << SECONDS_TENS)
+#define MINUTES_ONES_MAP (0x01 << MINUTES_ONES)
+#define MINUTES_TENS_MAP (0x01 << MINUTES_TENS)
+#define HOURS_ONES_MAP   (0x01 << HOURS_ONES)
+#define HOURS_TENS_MAP   (0x01 << HOURS_TENS)
+
+// WS2812 (or compatible) LEDs on the back of the display modules.
+#define BACKLIGHTS_PIN (12)
+
+// Buttons, active low, externally pulled up (with actual resistors!)
+#define BUTTON_LEFT_PIN (33)
+#define BUTTON_MODE_PIN (32)
+#define BUTTON_RIGHT_PIN (35)
+#define BUTTON_POWER_PIN (34)
+
+// I2C to DS3231 RTC.
+#define RTC_SCL_PIN (22)
+#define RTC_SDA_PIN (21)
+
+// Chip Select shift register, to select the display
+#define CSSR_DATA_PIN (14)
+#define CSSR_CLOCK_PIN (16)
+#define CSSR_LATCH_PIN (17)
+
+// SPI to displays
+// DEFINED IN User_Setup.h
+// Look for: TFT_MOSI, TFT_SCLK, TFT_CS, TFT_DC, and TFT_RST
+
+// Power for all TFT displays are grounded through a MOSFET so they can all be turned off.
+// Active HIGH.
+#define TFT_ENABLE_PIN (27)
+
+#endif // ELEKSTUBEHAX_HARDWARE_H
diff --git a/usermods/EleksTube_IPS/TFTs.h b/usermods/EleksTube_IPS/TFTs.h
new file mode 100644
index 000000000..e96299047
--- /dev/null
+++ b/usermods/EleksTube_IPS/TFTs.h
@@ -0,0 +1,169 @@
+#ifndef TFTS_H
+#define TFTS_H
+
+#include <FS.h>
+
+#include <TFT_eSPI.h>
+#include "Hardware.h"
+#include "ChipSelect.h"
+
+class TFTs : public TFT_eSPI {
+private:
+  uint8_t digits[NUM_DIGITS];
+
+  // These read 16- and 32-bit types from the SD card file.
+  // BMP data is stored little-endian, Arduino is little-endian too.
+  // May need to reverse subscript order if porting elsewhere.
+
+  uint16_t read16(fs::File &f) {
+    uint16_t result;
+    ((uint8_t *)&result)[0] = f.read(); // LSB
+    ((uint8_t *)&result)[1] = f.read(); // MSB
+    return result;
+  }
+
+  uint32_t read32(fs::File &f) {
+    uint32_t result;
+    ((uint8_t *)&result)[0] = f.read(); // LSB
+    ((uint8_t *)&result)[1] = f.read();
+    ((uint8_t *)&result)[2] = f.read();
+    ((uint8_t *)&result)[3] = f.read(); // MSB
+    return result;
+  }
+
+  uint16_t output_buffer[TFT_HEIGHT][TFT_WIDTH];
+
+  // These BMP functions are stolen directly from the TFT_SPIFFS_BMP example in the TFT_eSPI library.
+  // Unfortunately, they aren't part of the library itself, so I had to copy them.
+  // I've modified drawBmp to buffer the whole image at once instead of doing it line-by-line.
+
+  //// BEGIN STOLEN CODE
+
+  bool drawBmp(const char *filename) {
+    fs::File bmpFS;
+
+    // Open requested file on SD card
+    bmpFS = WLED_FS.open(filename, "r");
+
+    if (!bmpFS)
+    {
+      Serial.println(F("File not found"));
+      return(false);
+    }
+
+    uint32_t seekOffset;
+    int16_t w, h, row;
+    uint8_t  r, g, b;
+
+    uint16_t magic = read16(bmpFS);
+    if (magic == 0xFFFF) {
+      Serial.println(F("BMP not found!"));
+      bmpFS.close();
+      return(false);
+    }
+    
+    if (magic != 0x4D42) {
+      Serial.print(F("File not a BMP. Magic: "));
+      Serial.println(magic);
+      bmpFS.close();
+      return(false);
+    }
+
+    read32(bmpFS);
+    read32(bmpFS);
+    seekOffset = read32(bmpFS);
+    read32(bmpFS);
+    w = read32(bmpFS);
+    h = read32(bmpFS);
+
+    if ((read16(bmpFS) != 1) || (read16(bmpFS) != 24) || (read32(bmpFS) != 0)) {
+      Serial.println(F("BMP format not recognized."));
+      bmpFS.close();
+      return(false);
+    }
+
+    //draw img that is shorter than 240pix into the center
+    int16_t y = (height() - h) /2;
+
+    bool oldSwapBytes = getSwapBytes();
+    setSwapBytes(true);
+    bmpFS.seek(seekOffset);
+
+    uint16_t padding = (4 - ((w * 3) & 3)) & 3;
+    uint8_t lineBuffer[w * 3 + padding];
+    
+    // row is decremented as the BMP image is drawn bottom up
+    for (row = h-1; row >= 0; row--) {
+      if (row & 0b00000111 == 7) strip.service(); //still refresh backlight to mitigate stutter every few rows
+      bmpFS.read(lineBuffer, sizeof(lineBuffer));
+      uint8_t*  bptr = lineBuffer;
+      
+      // Convert 24 to 16 bit colours while copying to output buffer.
+      for (uint16_t col = 0; col < w; col++)
+      {
+        b = *bptr++;
+        g = *bptr++;
+        r = *bptr++;
+        output_buffer[row][col] = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
+      }
+    }
+    
+    pushImage(0, y, w, h, (uint16_t *)output_buffer);
+    setSwapBytes(oldSwapBytes);
+
+    bmpFS.close();
+    return(true);
+  }
+
+public:
+  TFTs() : TFT_eSPI(), chip_select()
+    { for (uint8_t digit=0; digit < NUM_DIGITS; digit++) digits[digit] = 0; }
+
+  // no == Do not send to TFT. yes == Send to TFT if changed. force == Send to TFT.
+  enum show_t { no, yes, force };
+  // A digit of 0xFF means blank the screen.
+  const static uint8_t blanked = 255;
+  
+  void begin() {
+    pinMode(TFT_ENABLE_PIN, OUTPUT);
+    digitalWrite(TFT_ENABLE_PIN, HIGH); //enable displays on boot
+
+    // Start with all displays selected.
+    chip_select.begin();
+    chip_select.setAll();
+
+    // Initialize the super class.
+    init();
+  }
+
+  void showDigit(uint8_t digit) {
+    chip_select.setDigit(digit);
+
+    if (digits[digit] == blanked) {
+      fillScreen(TFT_BLACK);
+    }
+    else {
+      // Filenames are no bigger than "255.bmp\0"
+      char file_name[10];
+      sprintf(file_name, "/%d.bmp", digits[digit]);
+      drawBmp(file_name);
+    }
+  }
+
+  void setDigit(uint8_t digit, uint8_t value, show_t show=yes) {
+    uint8_t old_value = digits[digit];
+    digits[digit] = value;
+  
+    if (show != no && (old_value != value || show == force)) {
+      showDigit(digit);
+    }
+  }
+  uint8_t getDigit(uint8_t digit)                 { return digits[digit]; }
+
+  void showAllDigits()               { for (uint8_t digit=0; digit < NUM_DIGITS; digit++) showDigit(digit); }
+
+  // Making chip_select public so we don't have to proxy all methods, and the caller can just use it directly.
+  ChipSelect chip_select;
+};
+
+#endif // TFTS_H
diff --git a/usermods/EleksTube_IPS/User_Setup.h b/usermods/EleksTube_IPS/User_Setup.h
new file mode 100644
index 000000000..b4b2edab0
--- /dev/null
+++ b/usermods/EleksTube_IPS/User_Setup.h
@@ -0,0 +1,47 @@
+/*
+ * This is intended to over-ride `User_Setup.h` that comes with the TFT_eSPI library.
+ * I hate having to modify the library code.
+ */
+
+// ST7789 135 x 240 display with no chip select line
+
+#define ST7789_DRIVER     // Configure all registers
+
+#define TFT_WIDTH  135
+#define TFT_HEIGHT 240
+
+#define CGRAM_OFFSET      // Library will add offsets required
+
+//#define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
+//#define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red
+
+//#define TFT_INVERSION_ON
+//#define TFT_INVERSION_OFF
+
+// EleksTube IPS
+#define TFT_SDA_READ      // Read and write on the MOSI/SDA pin, no separate MISO pin
+#define TFT_MOSI 23
+#define TFT_SCLK 18
+//#define TFT_CS    -1 // Not connected
+#define TFT_DC   25  // Data Command, aka Register Select or RS
+#define TFT_RST  26  // Connect reset to ensure display initialises
+
+#define LOAD_GLCD   // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
+//#define LOAD_FONT2  // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
+//#define LOAD_FONT4  // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
+//#define LOAD_FONT6  // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
+//#define LOAD_FONT7  // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:.
+//#define LOAD_FONT8  // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
+//#define LOAD_FONT8N // Font 8. Alternative to Font 8 above, slightly narrower, so 3 digits fit a 160 pixel TFT
+//#define LOAD_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts
+
+//#define SMOOTH_FONT
+
+
+//#define SPI_FREQUENCY  27000000
+#define SPI_FREQUENCY  40000000
+
+/*
+ * To make the Library not over-write all this:
+ */
+#define USER_SETUP_LOADED
diff --git a/usermods/EleksTube_IPS/bmp/0.bmp b/usermods/EleksTube_IPS/bmp/0.bmp
new file mode 100644
index 000000000..e7d778560
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/0.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/1.bmp b/usermods/EleksTube_IPS/bmp/1.bmp
new file mode 100644
index 000000000..209529f9a
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/1.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/2.bmp b/usermods/EleksTube_IPS/bmp/2.bmp
new file mode 100644
index 000000000..d94a55d5f
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/2.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/3.bmp b/usermods/EleksTube_IPS/bmp/3.bmp
new file mode 100644
index 000000000..401961172
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/3.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/4.bmp b/usermods/EleksTube_IPS/bmp/4.bmp
new file mode 100644
index 000000000..7b663d8ad
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/4.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/5.bmp b/usermods/EleksTube_IPS/bmp/5.bmp
new file mode 100644
index 000000000..b27766486
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/5.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/6.bmp b/usermods/EleksTube_IPS/bmp/6.bmp
new file mode 100644
index 000000000..04984b5c0
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/6.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/7.bmp b/usermods/EleksTube_IPS/bmp/7.bmp
new file mode 100644
index 000000000..83d8e9458
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/7.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/8.bmp b/usermods/EleksTube_IPS/bmp/8.bmp
new file mode 100644
index 000000000..565980e89
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/8.bmp differ
diff --git a/usermods/EleksTube_IPS/bmp/9.bmp b/usermods/EleksTube_IPS/bmp/9.bmp
new file mode 100644
index 000000000..88cc3004c
Binary files /dev/null and b/usermods/EleksTube_IPS/bmp/9.bmp differ
diff --git a/usermods/EleksTube_IPS/readme.md b/usermods/EleksTube_IPS/readme.md
new file mode 100644
index 000000000..a510ad6e1
--- /dev/null
+++ b/usermods/EleksTube_IPS/readme.md
@@ -0,0 +1,21 @@
+# EleksTube IPS Clock usermod
+
+This usermod allows WLED to run on the EleksTube IPS clock.
+It enables running all WLED effects on the background SK6812 lighting, while displaying digit bitmaps on the 6 IPS screens.
+Code is largely based on https://github.com/SmittyHalibut/EleksTubeHAX by Mark Smith!
+
+Supported:
+- Display with custom bitmaps from filesystem
+- Background lighting
+- Power button
+- RTC (with RTC usermod)
+- Standard WLED time features (NTP, DST, timezones)
+
+Not supported:
+- 3 navigation buttons, on-device setup
+
+## Installation 
+
+Compile and upload to clock using the `elekstube_ips` PlatformIO environment
+Once uploaded (the clock can be flashed like any ESP32 module), go to `[WLED-IP]/edit` and upload the 0-9.bmp files from the bmp folder.
+Use LED pin 12, relay pin 27 and button pin 34.
\ No newline at end of file
diff --git a/usermods/EleksTube_IPS/usermod_elekstube_ips.h b/usermods/EleksTube_IPS/usermod_elekstube_ips.h
new file mode 100644
index 000000000..4f820c268
--- /dev/null
+++ b/usermods/EleksTube_IPS/usermod_elekstube_ips.h
@@ -0,0 +1,63 @@
+#pragma once
+#include "TFTs.h"
+#include "wled.h"
+
+//Large parts of the code are from https://github.com/SmittyHalibut/EleksTubeHAX
+
+class ElekstubeIPSUsermod : public Usermod {
+  private:
+    TFTs tfts;
+    void updateClockDisplay(TFTs::show_t show=TFTs::yes) {
+      bool set[6] = {false}; 
+      for (uint8_t i = 0; i<6; i++) {
+        char c = cronixieDisplay[i];
+        if (c >= '0' && c <= '9') {
+          tfts.setDigit(5-i, c - '0', show); set[i] = true;
+        } else if (c >= 'A' && c <= 'G') {
+          tfts.setDigit(5-i, c - 'A' + 10, show); set[i] = true; //10.bmp to 16.bmp static display
+        } else if (c == '-' || c == '_' || c == ' ') {
+          tfts.setDigit(5-i, 255, show); set[i] = true; //blank
+        } else {
+          set[i] = false; //display HHMMSS time
+        }
+      }
+      uint8_t hr = hour(localTime);
+      uint8_t hrTens = hr/10;
+      uint8_t mi = minute(localTime);
+      uint8_t mittens = mi/10;
+      uint8_t s = second(localTime);
+      uint8_t sTens = s/10;
+      if (!set[0]) tfts.setDigit(HOURS_TENS, hrTens, show);
+      if (!set[1]) tfts.setDigit(HOURS_ONES, hr - hrTens*10, show);
+      if (!set[2]) tfts.setDigit(MINUTES_TENS, mittens, show);
+      if (!set[3]) tfts.setDigit(MINUTES_ONES, mi - mittens*10, show);
+      if (!set[4]) tfts.setDigit(SECONDS_TENS, sTens, show);
+      if (!set[5]) tfts.setDigit(SECONDS_ONES, s - sTens*10, show);
+    }
+    unsigned long lastTime = 0;
+  public:
+
+    void setup() {
+      tfts.begin();
+      tfts.fillScreen(TFT_BLACK);
+      tfts.setTextColor(TFT_WHITE, TFT_BLACK);
+      tfts.setCursor(0, 0, 2);
+      tfts.println("<STARTUP>");
+    }
+
+    void loop() {
+      if (lastTime == 0) {
+        tfts.fillScreen(TFT_BLACK);
+        updateClockDisplay(TFTs::force);
+      }
+      if (millis() - lastTime > 100) {
+        updateClockDisplay();
+        lastTime = millis();
+      }
+    }
+
+    uint16_t getId()
+    {
+      return USERMOD_ID_ELEKSTUBE_IPS;
+    }
+};
\ No newline at end of file
diff --git a/usermods/RTC/readme.md b/usermods/RTC/readme.md
new file mode 100644
index 000000000..3aaa60911
--- /dev/null
+++ b/usermods/RTC/readme.md
@@ -0,0 +1,8 @@
+# DS1307/DS3231 Real time clock
+
+Gets the time from I2C RTC module on boot. This allows clocks to operate e.g. if temporarily no WiFi is available.
+The stored time is updated each time NTP is synced. 
+
+## Installation 
+
+Add the build flag `-D USERMOD_RTC` to your platformio environment.
diff --git a/usermods/RTC/usermod_rtc.h b/usermods/RTC/usermod_rtc.h
new file mode 100644
index 000000000..bf0047a72
--- /dev/null
+++ b/usermods/RTC/usermod_rtc.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include "src/dependencies/time/DS1307RTC.h"
+#include "wled.h"
+
+//Connect DS1307 to standard I2C pins (ESP32: GPIO 21 (SDA)/GPIO 22 (SCL))
+
+class RTCUsermod : public Usermod {
+  private:
+    unsigned long lastTime = 0;
+    bool disabled = false;
+  public:
+
+    void setup() {
+      time_t rtcTime = RTC.get();
+      if (rtcTime) {
+        setTime(rtcTime);
+        updateLocalTime();
+      } else {
+        if (!RTC.chipPresent()) disabled = true; //don't waste time if H/W error
+      }
+    }
+
+    void loop() {
+      if (!disabled && millis() - lastTime > 500) {
+        time_t t = now();
+        if (t != RTC.get()) RTC.set(t); //set RTC to NTP/UI-provided value
+
+        lastTime = millis();
+      }
+    }
+
+    uint16_t getId()
+    {
+      return USERMOD_ID_RTC;
+    }
+};
\ No newline at end of file
diff --git a/usermods/usermod_v2_rotary_encoder_ui/platformio_override.ini.sample b/usermods/usermod_v2_rotary_encoder_ui/platformio_override.ini.sample
index cc39d65cf..4b537a8f7 100644
--- a/usermods/usermod_v2_rotary_encoder_ui/platformio_override.ini.sample
+++ b/usermods/usermod_v2_rotary_encoder_ui/platformio_override.ini.sample
@@ -9,7 +9,7 @@ build_unflags = ${common.build_unflags}
 build_flags =
     ${common.build_flags_esp32} 
     -D USERMOD_MODE_SORT
-    -D USERMOD_FOUR_LINE_DISLAY -D FLD_PIN_SCL=22 -D FLD_PIN_SDA=21
+    -D USERMOD_FOUR_LINE_DISPLAY -D FLD_PIN_SCL=22 -D FLD_PIN_SDA=21
     -D USERMOD_ROTARY_ENCODER_UI -D ENCODER_DT_PIN=18 -D ENCODER_CLK_PIN=5 -D ENCODER_SW_PIN=19  
     -D USERMOD_AUTO_SAVE -D AUTOSAVE_PRESET_NUM=1
     -D LEDPIN=16 -D BTNPIN=13
@@ -28,7 +28,7 @@ build_unflags = ${common.build_unflags}
 build_flags =
     ${common.build_flags_esp8266} 
     -D USERMOD_MODE_SORT
-    -D USERMOD_FOUR_LINE_DISLAY -D FLD_PIN_SCL=5 -D FLD_PIN_SDA=4
+    -D USERMOD_FOUR_LINE_DISPLAY -D FLD_PIN_SCL=5 -D FLD_PIN_SDA=4
     -D USERMOD_ROTARY_ENCODER_UI -D ENCODER_DT_PIN=12 -D ENCODER_CLK_PIN=14 -D ENCODER_SW_PIN=13
     -D USERMOD_AUTO_SAVE -D AUTOSAVE_PRESET_NUM=1
     -D LEDPIN=3 -D BTNPIN=0
diff --git a/usermods/usermod_v2_rotary_encoder_ui/readme.md b/usermods/usermod_v2_rotary_encoder_ui/readme.md
index 4477590b5..9bbcd6a6c 100644
--- a/usermods/usermod_v2_rotary_encoder_ui/readme.md
+++ b/usermods/usermod_v2_rotary_encoder_ui/readme.md
@@ -16,7 +16,7 @@ This file should be placed in the same directory as `platformio.ini`.
 ### Define Your Options
 
 * `USERMOD_ROTARY_ENCODER_UI`  - define this to have this user mod included wled00\usermods_list.cpp
-* `USERMOD_FOUR_LINE_DISLAY`   - define this to have this the Four Line Display mod included wled00\usermods_list.cpp - also tells this usermod that the display is available (see the Four Line Display usermod `readme.md` for more details)
+* `USERMOD_FOUR_LINE_DISPLAY`  - define this to have this the Four Line Display mod included wled00\usermods_list.cpp - also tells this usermod that the display is available (see the Four Line Display usermod `readme.md` for more details)
 * `ENCODER_DT_PIN`             - The encoders DT pin, defaults to 12
 * `ENCODER_CLK_PIN`            - The encoders CLK pin, defaults to 14
 * `ENCODER_SW_PIN`             - The encoders SW pin, defaults to 13
diff --git a/usermods/usermod_v2_rotary_encoder_ui/usermod_v2_rotary_encoder_ui.h b/usermods/usermod_v2_rotary_encoder_ui/usermod_v2_rotary_encoder_ui.h
index 6dc2a1be3..5ff1090d2 100644
--- a/usermods/usermod_v2_rotary_encoder_ui/usermod_v2_rotary_encoder_ui.h
+++ b/usermods/usermod_v2_rotary_encoder_ui/usermod_v2_rotary_encoder_ui.h
@@ -37,7 +37,7 @@
 #define ENCODER_SW_PIN 13
 #endif
 
-#ifndef USERMOD_FOUR_LINE_DISLAY
+#ifndef USERMOD_FOUR_LINE_DISPLAY
 // These constants won't be defined if we aren't using FourLineDisplay.
 #define FLD_LINE_3_BRIGHTNESS       0
 #define FLD_LINE_3_EFFECT_SPEED     0
@@ -62,7 +62,7 @@ private:
   unsigned char button_state = HIGH;
   unsigned char prev_button_state = HIGH;
   
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
   FourLineDisplayUsermod *display;
 #else
   void* display = nullptr;
@@ -96,7 +96,7 @@ public:
     modes_alpha_indexes = modeSortUsermod->getModesAlphaIndexes();
     palettes_alpha_indexes = modeSortUsermod->getPalettesAlphaIndexes();
 
-#ifdef USERMOD_FOUR_LINE_DISLAY    
+#ifdef USERMOD_FOUR_LINE_DISPLAY    
     // This Usermod uses FourLineDisplayUsermod for the best experience.
     // But it's optional. But you want it.
     display = (FourLineDisplayUsermod*) usermods.lookup(USERMOD_ID_FOUR_LINE_DISP);
@@ -248,7 +248,7 @@ public:
   }
 
   boolean changeState(const char *stateName, byte lineThreeMode, byte markedLine) {
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
     if (display != nullptr) {
       if (display->wakeDisplay()) {
         // Throw away wake up input
@@ -272,7 +272,7 @@ public:
   }
 
   void changeBrightness(bool increase) {
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
     if (display && display->wakeDisplay()) {
       // Throw away wake up input
       return;
@@ -288,7 +288,7 @@ public:
   }
 
   void changeEffect(bool increase) {
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
     if (display && display->wakeDisplay()) {
       // Throw away wake up input
       return;
@@ -305,7 +305,7 @@ public:
   }
 
   void changeEffectSpeed(bool increase) {
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
     if (display && display->wakeDisplay()) {
       // Throw away wake up input
       return;
@@ -321,7 +321,7 @@ public:
   }
 
   void changeEffectIntensity(bool increase) {
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
     if (display && display->wakeDisplay()) {
       // Throw away wake up input
       return;
@@ -337,7 +337,7 @@ public:
   }
 
   void changePalette(bool increase) {
-#ifdef USERMOD_FOUR_LINE_DISLAY
+#ifdef USERMOD_FOUR_LINE_DISPLAY
     if (display && display->wakeDisplay()) {
       // Throw away wake up input
       return;
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 8e937d741..4d08bc144 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -49,7 +49,7 @@
 //#define DEFAULT_LED_TYPE TYPE_WS2812_RGB
 
 #ifndef PIXEL_COUNTS
-  #define PIXEL_COUNTS 30
+  #define PIXEL_COUNTS DEFAULT_LED_COUNT
 #endif
 
 #ifndef DATA_PINS
diff --git a/wled00/const.h b/wled00/const.h
index 36c55c7e8..19c2853ee 100644
--- a/wled00/const.h
+++ b/wled00/const.h
@@ -55,6 +55,8 @@
 #define USERMOD_ID_VL53L0X               12     //Usermod "usermod_vl53l0x_gestures.h"
 #define USERMOD_ID_MULTI_RELAY           13     //Usermod "usermod_multi_relay.h"
 #define USERMOD_ID_ANIMATED_STAIRCASE    14     //Usermod "Animated_Staircase.h"
+#define USERMOD_ID_RTC                   15     //Usermod "usermod_rtc.h"
+#define USERMOD_ID_ELEKSTUBE_IPS         16     //Usermod "usermod_elekstube_ips.h"
 
 //Access point behavior
 #define AP_BEHAVIOR_BOOT_NO_CONN          0     //Open AP when no connection after boot
diff --git a/wled00/json.cpp b/wled00/json.cpp
index 5bd76ec2e..a2cf126da 100644
--- a/wled00/json.cpp
+++ b/wled00/json.cpp
@@ -270,6 +270,10 @@ bool deserializeState(JsonObject root)
     }
   }
 
+  if (root["nx"].is<const char*>()) {
+    strncpy(cronixieDisplay, root["nx"], 6);
+  }
+
   usermods.readFromJsonState(root);
 
   int ps = root[F("psave")] | -1;
diff --git a/wled00/mqtt.cpp b/wled00/mqtt.cpp
index 79de0afb8..8540335ba 100644
--- a/wled00/mqtt.cpp
+++ b/wled00/mqtt.cpp
@@ -137,7 +137,7 @@ void publishMqtt()
   XML_response(nullptr, apires);
   strcpy(subuf, mqttDeviceTopic);
   strcat_P(subuf, PSTR("/v"));
-  mqtt->publish(subuf, 0, true, apires);
+  mqtt->publish(subuf, 0, false, apires);
 }
 
 
diff --git a/wled00/src/dependencies/time/DS1307RTC.cpp b/wled00/src/dependencies/time/DS1307RTC.cpp
new file mode 100644
index 000000000..2c16a8a33
--- /dev/null
+++ b/wled00/src/dependencies/time/DS1307RTC.cpp
@@ -0,0 +1,218 @@
+/*
+ * DS1307RTC.h - library for DS1307 RTC
+  
+  Copyright (c) Michael Margolis 2009
+  This library is intended to be uses with Arduino Time library functions
+
+  The library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+  
+  30 Dec 2009 - Initial release
+  5 Sep 2011 updated for Arduino 1.0
+ */
+
+
+#if defined (__AVR_ATtiny84__) || defined(__AVR_ATtiny85__) || (__AVR_ATtiny2313__)
+#include <TinyWireM.h>
+#define Wire TinyWireM
+#else
+#include <Wire.h>
+#endif
+#include "DS1307RTC.h"
+
+#define DS1307_CTRL_ID 0x68 
+
+DS1307RTC::DS1307RTC()
+{
+  Wire.begin();
+}
+  
+// PUBLIC FUNCTIONS
+time_t DS1307RTC::get()   // Aquire data from buffer and convert to time_t
+{
+  tmElements_t tm;
+  if (read(tm) == false) return 0;
+  return(makeTime(tm));
+}
+
+bool DS1307RTC::set(time_t t)
+{
+  tmElements_t tm;
+  breakTime(t, tm);
+  return write(tm); 
+}
+
+// Aquire data from the RTC chip in BCD format
+bool DS1307RTC::read(tmElements_t &tm)
+{
+  uint8_t sec;
+  Wire.beginTransmission(DS1307_CTRL_ID);
+#if ARDUINO >= 100  
+  Wire.write((uint8_t)0x00); 
+#else
+  Wire.send(0x00);
+#endif  
+  if (Wire.endTransmission() != 0) {
+    exists = false;
+    return false;
+  }
+  exists = true;
+
+  // request the 7 data fields   (secs, min, hr, dow, date, mth, yr)
+  Wire.requestFrom(DS1307_CTRL_ID, tmNbrFields);
+  if (Wire.available() < tmNbrFields) return false;
+#if ARDUINO >= 100
+  sec = Wire.read();
+  tm.Second = bcd2dec(sec & 0x7f);   
+  tm.Minute = bcd2dec(Wire.read() );
+  tm.Hour =   bcd2dec(Wire.read() & 0x3f);  // mask assumes 24hr clock
+  tm.Wday = bcd2dec(Wire.read() );
+  tm.Day = bcd2dec(Wire.read() );
+  tm.Month = bcd2dec(Wire.read() );
+  tm.Year = y2kYearToTm((bcd2dec(Wire.read())));
+#else
+  sec = Wire.receive();
+  tm.Second = bcd2dec(sec & 0x7f);   
+  tm.Minute = bcd2dec(Wire.receive() );
+  tm.Hour =   bcd2dec(Wire.receive() & 0x3f);  // mask assumes 24hr clock
+  tm.Wday = bcd2dec(Wire.receive() );
+  tm.Day = bcd2dec(Wire.receive() );
+  tm.Month = bcd2dec(Wire.receive() );
+  tm.Year = y2kYearToTm((bcd2dec(Wire.receive())));
+#endif
+  if (sec & 0x80) return false; // clock is halted
+  return true;
+}
+
+bool DS1307RTC::write(tmElements_t &tm)
+{
+  // To eliminate any potential race conditions,
+  // stop the clock before writing the values,
+  // then restart it after.
+  Wire.beginTransmission(DS1307_CTRL_ID);
+#if ARDUINO >= 100  
+  Wire.write((uint8_t)0x00); // reset register pointer  
+  Wire.write((uint8_t)0x80); // Stop the clock. The seconds will be written last
+  Wire.write(dec2bcd(tm.Minute));
+  Wire.write(dec2bcd(tm.Hour));      // sets 24 hour format
+  Wire.write(dec2bcd(tm.Wday));   
+  Wire.write(dec2bcd(tm.Day));
+  Wire.write(dec2bcd(tm.Month));
+  Wire.write(dec2bcd(tmYearToY2k(tm.Year))); 
+#else  
+  Wire.send(0x00); // reset register pointer  
+  Wire.send(0x80); // Stop the clock. The seconds will be written last
+  Wire.send(dec2bcd(tm.Minute));
+  Wire.send(dec2bcd(tm.Hour));      // sets 24 hour format
+  Wire.send(dec2bcd(tm.Wday));   
+  Wire.send(dec2bcd(tm.Day));
+  Wire.send(dec2bcd(tm.Month));
+  Wire.send(dec2bcd(tmYearToY2k(tm.Year)));   
+#endif
+  if (Wire.endTransmission() != 0) {
+    exists = false;
+    return false;
+  }
+  exists = true;
+
+  // Now go back and set the seconds, starting the clock back up as a side effect
+  Wire.beginTransmission(DS1307_CTRL_ID);
+#if ARDUINO >= 100  
+  Wire.write((uint8_t)0x00); // reset register pointer  
+  Wire.write(dec2bcd(tm.Second)); // write the seconds, with the stop bit clear to restart
+#else  
+  Wire.send(0x00); // reset register pointer  
+  Wire.send(dec2bcd(tm.Second)); // write the seconds, with the stop bit clear to restart
+#endif
+  if (Wire.endTransmission() != 0) {
+    exists = false;
+    return false;
+  }
+  exists = true;
+  return true;
+}
+
+unsigned char DS1307RTC::isRunning()
+{
+  Wire.beginTransmission(DS1307_CTRL_ID);
+#if ARDUINO >= 100  
+  Wire.write((uint8_t)0x00); 
+#else
+  Wire.send(0x00);
+#endif  
+  Wire.endTransmission();
+
+  // Just fetch the seconds register and check the top bit
+  Wire.requestFrom(DS1307_CTRL_ID, 1);
+#if ARDUINO >= 100
+  return !(Wire.read() & 0x80);
+#else
+  return !(Wire.receive() & 0x80);
+#endif  
+}
+
+void DS1307RTC::setCalibration(char calValue)
+{
+  unsigned char calReg = abs(calValue) & 0x1f;
+  if (calValue >= 0) calReg |= 0x20; // S bit is positive to speed up the clock
+  Wire.beginTransmission(DS1307_CTRL_ID);
+#if ARDUINO >= 100  
+  Wire.write((uint8_t)0x07); // Point to calibration register
+  Wire.write(calReg);
+#else  
+  Wire.send(0x07); // Point to calibration register
+  Wire.send(calReg);
+#endif
+  Wire.endTransmission();  
+}
+
+char DS1307RTC::getCalibration()
+{
+  Wire.beginTransmission(DS1307_CTRL_ID);
+#if ARDUINO >= 100  
+  Wire.write((uint8_t)0x07); 
+#else
+  Wire.send(0x07);
+#endif  
+  Wire.endTransmission();
+
+  Wire.requestFrom(DS1307_CTRL_ID, 1);
+#if ARDUINO >= 100
+  unsigned char calReg = Wire.read();
+#else
+  unsigned char calReg = Wire.receive();
+#endif
+  char out = calReg & 0x1f;
+  if (!(calReg & 0x20)) out = -out; // S bit clear means a negative value
+  return out;
+}
+
+// PRIVATE FUNCTIONS
+
+// Convert Decimal to Binary Coded Decimal (BCD)
+uint8_t DS1307RTC::dec2bcd(uint8_t num)
+{
+  return ((num/10 * 16) + (num % 10));
+}
+
+// Convert Binary Coded Decimal (BCD) to Decimal
+uint8_t DS1307RTC::bcd2dec(uint8_t num)
+{
+  return ((num/16 * 10) + (num % 16));
+}
+
+bool DS1307RTC::exists = false;
+
+DS1307RTC RTC = DS1307RTC(); // create an instance for the user
+
diff --git a/wled00/src/dependencies/time/DS1307RTC.h b/wled00/src/dependencies/time/DS1307RTC.h
new file mode 100644
index 000000000..2f3181632
--- /dev/null
+++ b/wled00/src/dependencies/time/DS1307RTC.h
@@ -0,0 +1,40 @@
+/*
+ * DS1307RTC.h - library for DS1307 RTC
+ * This library is intended to be uses with Arduino Time library functions
+ */
+
+#ifndef DS1307RTC_h
+#define DS1307RTC_h
+
+#include "TimeLib.h"
+
+// library interface description
+class DS1307RTC
+{
+  // user-accessible "public" interface
+  public:
+    DS1307RTC();
+    static time_t get();
+    static bool set(time_t t);
+    static bool read(tmElements_t &tm);
+    static bool write(tmElements_t &tm);
+    static bool chipPresent() { return exists; }
+    static unsigned char isRunning();
+    static void setCalibration(char calValue);
+    static char getCalibration();
+
+  private:
+    static bool exists;
+    static uint8_t dec2bcd(uint8_t num);
+    static uint8_t bcd2dec(uint8_t num);
+};
+
+#ifdef RTC
+#undef RTC // workaround for Arduino Due, which defines "RTC"...
+#endif
+
+extern DS1307RTC RTC;
+
+#endif
+ 
+
diff --git a/wled00/usermods_list.cpp b/wled00/usermods_list.cpp
index 1835148fd..77af14139 100644
--- a/wled00/usermods_list.cpp
+++ b/wled00/usermods_list.cpp
@@ -61,6 +61,14 @@
 #include "../usermods/multi_relay/usermod_multi_relay.h"
 #endif
 
+#ifdef USERMOD_RTC
+#include "../usermods/RTC/usermod_rtc.h"
+#endif
+
+#ifdef USERMOD_ELEKSTUBE_IPS
+#include "../usermods/EleksTube_IPS/usermod_elekstube_ips.h"
+#endif
+
 void registerUsermods()
 {
 /*
@@ -118,4 +126,12 @@ void registerUsermods()
   #ifdef USERMOD_MULTI_RELAY
   usermods.add(new MultiRelay());
   #endif
+
+  #ifdef USERMOD_RTC
+  usermods.add(new RTCUsermod());
+  #endif
+
+  #ifdef USERMOD_ELEKSTUBE_IPS
+  usermods.add(new ElekstubeIPSUsermod());
+  #endif
 }
diff --git a/wled00/wled_math.h b/wled00/wled_math.h
index 88d241797..8629ea096 100644
--- a/wled00/wled_math.h
+++ b/wled00/wled_math.h
@@ -11,6 +11,8 @@
 
 #include <Arduino.h> //PI constant
 
+//#define WLED_DEBUG_MATH
+
 #define modd(x, y) ((x) - (int)((x) / (y)) * (y))
 
 float cos_t(float x)
@@ -24,38 +26,58 @@ float cos_t(float x)
   }
   float xx = x * x;
 
-  return sign * (1 - ((xx) / (2)) + ((xx * xx) / (24)) - ((xx * xx * xx) / (720)) + ((xx * xx * xx * xx) / (40320)) - ((xx * xx * xx * xx * xx) / (3628800)) + ((xx * xx * xx * xx * xx * xx) / (479001600)));
+  float res = sign * (1 - ((xx) / (2)) + ((xx * xx) / (24)) - ((xx * xx * xx) / (720)) + ((xx * xx * xx * xx) / (40320)) - ((xx * xx * xx * xx * xx) / (3628800)) + ((xx * xx * xx * xx * xx * xx) / (479001600)));
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("cos: %f,%f\n",res,cos(x));
+  #endif
+  return res;
 }
 
 float sin_t(float x) {
-  return cos_t(HALF_PI - x);
+  float res =  cos_t(HALF_PI - x);
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("sin: %f,%f\n",res,sin(x));
+  #endif
+  return res;
 }
 
 float tan_t(float x) {
   float c = cos_t(x);
   if (c==0.0) return 0;
-  return sin_t(x) / c;
+  float res = sin_t(x) / c;
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("tan: %f,%f\n",res,tan(x));
+  #endif
+  return res;
 }
 
 //https://stackoverflow.com/questions/3380628
 // Absolute error <= 6.7e-5
 float acos_t(float x) {
   float negate = float(x < 0);
-  x = std::abs(x);
+  float xabs = std::abs(x);
   float ret = -0.0187293;
-  ret = ret * x;
+  ret = ret * xabs;
   ret = ret + 0.0742610;
-  ret = ret * x;
+  ret = ret * xabs;
   ret = ret - 0.2121144;
-  ret = ret * x;
+  ret = ret * xabs;
   ret = ret + HALF_PI;
-  ret = ret * sqrt(1.0-x);
+  ret = ret * sqrt(1.0-xabs);
   ret = ret - 2 * negate * ret;
-  return negate * PI + ret;
+  float res = negate * PI + ret;
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("acos,%f,%f,%f\n",x,res,acos(x));
+  #endif
+  return res;
 }
 
 float asin_t(float x) {
-  return HALF_PI - acos_t(x);
+  float res = HALF_PI - acos_t(x);
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("asin,%f,%f,%f\n",x,res,asin(x));
+  #endif
+  return res;
 }
 
 //https://stackoverflow.com/a/42542593
@@ -63,21 +85,54 @@ float asin_t(float x) {
 #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
+
 float atan_t(float x) {
-  float xx = x * x;
-  return ((A*xx + B)*xx + C)*x;
+  bool neg = (x < 0);
+  #ifdef WLED_DEBUG_MATH
+  float xinput = x;
+  #endif
+  x = std::abs(x);
+  float res;
+  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
+    float xx = x * x;
+    res = (C4*xx*xx)+(C3*xx*x)+(C2*xx)+(C1*x)+C0;
+  } else { //this approximation is only for x <= 1
+    float xx = x * x;
+    res = ((A*xx + B)*xx + C)*x;
+  }
+  if (neg) res = -res;
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("atan,%f,%f,%f\n",xinput,res,atan(xinput));
+  #endif
+  return res;
 }
 
 float floor_t(float x) {
   bool neg = x < 0;
   int val = x;
   if (neg) val--;
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("floor: %f,%f\n",val,floor(x));
+  #endif
   return val;
 }
 
 float fmod_t(float num, float denom) {
   int tquot = num / denom;
-  return num - tquot * denom;
+  float res = num - tquot * denom;
+  #ifdef WLED_DEBUG_MATH
+  Serial.printf("fmod: %f,%f\n",res,fmod(num,denom));
+  #endif
+  return res;
 }
 
 #endif
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