diff --git a/usermods/Battery/usermod_v2_Battery.h b/usermods/Battery/usermod_v2_Battery.h
index d765ddbb86..c64cd4e48e 100644
--- a/usermods/Battery/usermod_v2_Battery.h
+++ b/usermods/Battery/usermod_v2_Battery.h
@@ -160,9 +160,9 @@ class UsermodBattery : public Usermod
       device[F("sw")]   = versionString;
 
       sprintf_P(buf, PSTR("homeassistant/%s/%s/%s/config"), type, mqttClientID, uid);
-      DEBUG_PRINTLN(buf);
+      DEBUGUM_PRINTLN(buf);
       size_t payload_size = serializeJson(doc, json_str);
-      DEBUG_PRINTLN(json_str);
+      DEBUGUM_PRINTLN(json_str);
 
       mqtt->publish(buf, 0, true, json_str, payload_size);
     }
diff --git a/usermods/PIR_sensor_switch/usermod_PIR_sensor_switch.h b/usermods/PIR_sensor_switch/usermod_PIR_sensor_switch.h
index 31f41e6c59..4a830b735d 100644
--- a/usermods/PIR_sensor_switch/usermod_PIR_sensor_switch.h
+++ b/usermods/PIR_sensor_switch/usermod_PIR_sensor_switch.h
@@ -229,7 +229,7 @@ void PIRsensorSwitch::switchStrip(bool switchOn)
   if (m_offOnly && bri && (switchOn || (!PIRtriggered && !switchOn))) return; //if lights on and off only, do nothing
   if (PIRtriggered && switchOn) return; //if already on and triggered before, do nothing
   PIRtriggered = switchOn;
-  DEBUGUM_PRINT(F("PIR: strip=")); DEBUGUM_PRINTLN(switchOn?"on":"off");
+  DEBUGUM_PRINTF_P(PSTR("PIR: strip=%s\n"), switchOn?"on":"off");
   if (switchOn) {
     if (m_onPreset) {
       if (currentPlaylist>0 && !offMode) {
@@ -384,7 +384,7 @@ void PIRsensorSwitch::setup()
       #endif
       sensorPinState[i] = digitalRead(PIRsensorPin[i]);
     } else {
-      DEBUGUM_PRINT(F("PIRSensorSwitch pin ")); DEBUGUM_PRINTLN(i); DEBUGUM_PRINTLN(F(" allocation failed."));
+      DEBUGUM_PRINTF_P(PSTR("PIRSensorSwitch: pin %d allocation failed.\n"), i);
       PIRsensorPin[i] = -1;  // allocation failed
     }
   }
@@ -471,7 +471,7 @@ void PIRsensorSwitch::addToJsonInfo(JsonObject &root)
 
 void PIRsensorSwitch::onStateChange(uint8_t mode) {
   if (!initDone) return;
-  DEBUGUM_PRINT(F("PIR: offTimerStart=")); DEBUGUM_PRINTLN(offTimerStart);
+  DEBUGUM_PRINTF_P(PSTR("PIR: offTimerStart=%lu\n"), offTimerStart);
   if (m_override && PIRtriggered && offTimerStart) { // debounce
     // checking PIRtriggered and offTimerStart will prevent cancellation upon On trigger
     DEBUGUM_PRINTLN(F("PIR: Canceled."));
@@ -561,12 +561,12 @@ bool PIRsensorSwitch::readFromConfig(JsonObject &root)
 
   if (!initDone) {
     // reading config prior to setup()
-    DEBUGUM_PRINTLN(F(" config loaded."));
+    DEBUGUM_PRINTLN(F(": config loaded."));
   } else {
     for (int i = 0; i < PIR_SENSOR_MAX_SENSORS; i++)
       if (oldPin[i] >= 0) PinManager::deallocatePin(oldPin[i], PinOwner::UM_PIR);
     setup();
-    DEBUGUM_PRINTLN(F(" config (re)loaded."));
+    DEBUGUM_PRINTLN(F(": config (re)loaded."));
   }
   // use "return !top["newestParameter"].isNull();" when updating Usermod with new features
   return !(pins.isNull() || pins.size() != PIR_SENSOR_MAX_SENSORS);
diff --git a/usermods/Temperature/usermod_temperature.h b/usermods/Temperature/usermod_temperature.h
index a4f98b8b37..d0df015765 100644
--- a/usermods/Temperature/usermod_temperature.h
+++ b/usermods/Temperature/usermod_temperature.h
@@ -122,8 +122,7 @@ float UsermodTemperature::readDallas() {
     if (OneWire::crc8(data,8) != data[8]) {
       DEBUGUM_PRINTLN(F("CRC error reading temperature."));
       for (unsigend i=0; i < 9; i++) DEBUGUM_PRINTF_P(PSTR("0x%02X "), data[i]);
-      DEBUGUM_PRINT(F(" => "));
-      DEBUGUM_PRINTF_P(PSTR("0x%02X\n"), OneWire::crc8(data,8));
+      DEBUGUM_PRINTF_P(PSTR(" => 0x%02X\n"), OneWire::crc8(data,8));
     }
     #endif
     switch(sensorFound) {
@@ -161,8 +160,7 @@ void UsermodTemperature::readTemperature() {
   lastMeasurement = millis();
   waitingForConversion = false;
   //DEBUGUM_PRINTF_P(PSTR("Read temperature %2.1f.\n"), temperature); // does not work properly on 8266
-  DEBUGUM_PRINT(F("Read temperature "));
-  DEBUGUM_PRINTLN(temperature);
+  DEBUGUM_PRINTF_P(PSTR("Read temperature %3.1f\n"), (double)temperature);
 }
 
 bool UsermodTemperature::findSensor() {
@@ -415,12 +413,12 @@ bool UsermodTemperature::readFromConfig(JsonObject &root) {
   if (!initDone) {
     // first run: reading from cfg.json
     temperaturePin = newTemperaturePin;
-    DEBUGUM_PRINTLN(F(" config loaded."));
+    DEBUGUM_PRINTLN(F(": config loaded."));
   } else {
-    DEBUGUM_PRINTLN(F(" config (re)loaded."));
+    DEBUGUM_PRINTLN(F(": config (re)loaded."));
     // changing paramters from settings page
     if (newTemperaturePin != temperaturePin) {
-      DEBUGUM_PRINTLN(F("Re-init temperature."));
+      DEBUGUM_PRINTLN(F(" Re-init temperature."));
       // deallocate pin and release memory
       delete oneWire;
       PinManager::deallocatePin(temperaturePin, PinOwner::UM_Temperature);
diff --git a/usermods/boblight/boblight.h b/usermods/boblight/boblight.h
index 16b43d8380..5465e247ce 100644
--- a/usermods/boblight/boblight.h
+++ b/usermods/boblight/boblight.h
@@ -173,8 +173,7 @@ class BobLightUsermod : public Usermod {
       numLights = lightcount;
 
       #if WLED_DEBUG_USERMODS
-      DEBUGUM_PRINTLN(F("Fill light data: "));
-      DEBUGUM_PRINTF_P(PSTR(" lights %d\n"), numLights);
+      DEBUGUM_PRINTF_P(PSTR("Fill light data:\n lights %d\n"), numLights);
       for (int i=0; i<numLights; i++) {
         DEBUGUM_PRINTF_P(PSTR(" light %s scan %2.1f %2.1f %2.1f %2.1f\n"), lights[i].lightname, lights[i].vscan[0], lights[i].vscan[1], lights[i].hscan[0], lights[i].hscan[1]);
       }
@@ -190,8 +189,7 @@ class BobLightUsermod : public Usermod {
     void setup() override {
       uint16_t totalLights = bottom + left + top + right;
       if ( totalLights > strip.getLengthTotal() ) {
-        DEBUGUM_PRINTLN(F("BobLight: Too many lights."));
-        DEBUGUM_PRINTF_P(PSTR("%d+%d+%d+%d>%d\n"), bottom, left, top, right, strip.getLengthTotal());
+        DEBUGUM_PRINTF_P(PSTR("BobLight: Too many lights.\n%d+%d+%d+%d>%d\n"), bottom, left, top, right, strip.getLengthTotal());
         totalLights = strip.getLengthTotal();
         top = bottom = (uint16_t) roundf((float)totalLights * 16.0f / 50.0f);
         left = right = (uint16_t) roundf((float)totalLights *  9.0f / 50.0f);
diff --git a/usermods/multi_relay/usermod_multi_relay.h b/usermods/multi_relay/usermod_multi_relay.h
index b833ffacda..73f4975b96 100644
--- a/usermods/multi_relay/usermod_multi_relay.h
+++ b/usermods/multi_relay/usermod_multi_relay.h
@@ -399,7 +399,7 @@ void MultiRelay::switchRelay(uint8_t relay, bool mode) {
       state |= (_relay[i].invert ? !_relay[i].state : _relay[i].state) << pin; // fill relay states for all pins
     }
     IOexpanderWrite(addrPcf8574, state);
-    DEBUGUM_PRINT(F("Writing to PCF8574: ")); DEBUGUM_PRINTLN(state);
+    DEBUGUM_PRINTF_P(PSTR("Writing to PCF8574: %d\n"), (int)state);
   } else if (_relay[relay].pin < 100) {
     pinMode(_relay[relay].pin, OUTPUT);
     digitalWrite(_relay[relay].pin, _relay[relay].invert ? !_relay[relay].state : _relay[relay].state);
@@ -781,8 +781,8 @@ bool MultiRelay::readFromConfig(JsonObject &root) {
   int8_t oldPin[MULTI_RELAY_MAX_RELAYS];
 
   JsonObject top = root[FPSTR(_name)];
+  DEBUGUM_PRINT(FPSTR(_name));
   if (top.isNull()) {
-    DEBUGUM_PRINT(FPSTR(_name));
     DEBUGUM_PRINTLN(F(": No config found. (Using defaults.)"));
     return false;
   }
@@ -809,10 +809,9 @@ bool MultiRelay::readFromConfig(JsonObject &root) {
     _relay[i].delay    = min(600,max(0,abs((int)_relay[i].delay))); // bounds checking max 10min
   }
 
-  DEBUGUM_PRINT(FPSTR(_name));
   if (!initDone) {
     // reading config prior to setup()
-    DEBUGUM_PRINTLN(F(" config loaded."));
+    DEBUGUM_PRINTLN(F(": config loaded."));
   } else {
     // deallocate all pins 1st
     for (int i=0; i<MULTI_RELAY_MAX_RELAYS; i++)
@@ -821,7 +820,7 @@ bool MultiRelay::readFromConfig(JsonObject &root) {
       }
     // allocate new pins
     setup();
-    DEBUGUM_PRINTLN(F(" config (re)loaded."));
+    DEBUGUM_PRINTLN(F(": config (re)loaded."));
   }
   // use "return !top["newestParameter"].isNull();" when updating Usermod with new features
   return !top[FPSTR(_pcf8574)].isNull();
diff --git a/usermods/usermod_v2_four_line_display_ALT/usermod_v2_four_line_display_ALT.h b/usermods/usermod_v2_four_line_display_ALT/usermod_v2_four_line_display_ALT.h
index d579c924be..1f46127d2b 100644
--- a/usermods/usermod_v2_four_line_display_ALT/usermod_v2_four_line_display_ALT.h
+++ b/usermods/usermod_v2_four_line_display_ALT/usermod_v2_four_line_display_ALT.h
@@ -1268,8 +1268,8 @@ bool FourLineDisplayUsermod::readFromConfig(JsonObject& root) {
   int8_t oldPin[3]; for (unsigned i=0; i<3; i++) oldPin[i] = ioPin[i];
 
   JsonObject top = root[FPSTR(_name)];
+  DEBUGUM_PRINT(FPSTR(_name));
   if (top.isNull()) {
-    DEBUGUM_PRINT(FPSTR(_name));
     DEBUGUM_PRINTLN(F(": No config found. (Using defaults.)"));
     return false;
   }
@@ -1293,13 +1293,12 @@ bool FourLineDisplayUsermod::readFromConfig(JsonObject& root) {
   else
     ioFrequency = min(3400, max(100, (int)(top[FPSTR(_busClkFrequency)] | ioFrequency/1000))) * 1000;  // limit frequency
 
-  DEBUGUM_PRINT(FPSTR(_name));
   if (!initDone) {
     // first run: reading from cfg.json
     type = newType;
-    DEBUGUM_PRINTLN(F(" config loaded."));
+    DEBUGUM_PRINTLN(F(": config loaded."));
   } else {
-    DEBUGUM_PRINTLN(F(" config (re)loaded."));
+    DEBUGUM_PRINTLN(F(": config (re)loaded."));
     // changing parameters from settings page
     bool pinsChanged = false;
     for (unsigned i=0; i<3; i++) if (ioPin[i] != oldPin[i]) { pinsChanged = true; break; }
diff --git a/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h b/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h
index 722478249d..fa3f0cf02a 100644
--- a/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h
+++ b/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h
@@ -392,13 +392,13 @@ byte RotaryEncoderUIUsermod::readPin(uint8_t pin) {
  * modes_alpha_indexes and palettes_alpha_indexes.
  */
 void RotaryEncoderUIUsermod::sortModesAndPalettes() {
-  DEBUGUM_PRINT(F("Sorting modes: ")); DEBUGUM_PRINTLN(strip.getModeCount());
+  DEBUGUM_PRINTF_P(PSTR("Sorting modes: %d\n"), (int)strip.getModeCount());
   //modes_qstrings = re_findModeStrings(JSON_mode_names, strip.getModeCount());
   modes_qstrings = strip.getModeDataSrc();
   modes_alpha_indexes = re_initIndexArray(strip.getModeCount());
   re_sortModes(modes_qstrings, modes_alpha_indexes, strip.getModeCount(), MODE_SORT_SKIP_COUNT);
 
-  DEBUGUM_PRINT(F("Sorting palettes: ")); DEBUGUM_PRINT(strip.getPaletteCount()); DEBUGUM_PRINT('/'); DEBUGUM_PRINTLN(strip.customPalettes.size());
+  DEBUGUM_PRINTF_P(PSTR("Sorting palettes: %u/%u"), (unsigned)strip.getPaletteCount(), strip.customPalettes.size());
   palettes_qstrings = re_findModeStrings(JSON_palette_names, strip.getPaletteCount());
   palettes_alpha_indexes = re_initIndexArray(strip.getPaletteCount());
   if (strip.customPalettes.size()) {
@@ -1102,8 +1102,8 @@ void RotaryEncoderUIUsermod::appendConfigData() {
 bool RotaryEncoderUIUsermod::readFromConfig(JsonObject &root) {
   // we look for JSON object: {"Rotary-Encoder":{"DT-pin":12,"CLK-pin":14,"SW-pin":13}}
   JsonObject top = root[FPSTR(_name)];
+  DEBUGUM_PRINT(FPSTR(_name));
   if (top.isNull()) {
-    DEBUGUM_PRINT(FPSTR(_name));
     DEBUGUM_PRINTLN(F(": No config found. (Using defaults.)"));
     return false;
   }
@@ -1124,29 +1124,28 @@ bool RotaryEncoderUIUsermod::readFromConfig(JsonObject &root) {
   usePcf8574 = top[FPSTR(_pcf8574)] | usePcf8574;
   addrPcf8574 = top[FPSTR(_pcfAddress)] | addrPcf8574;
 
-  DEBUGUM_PRINT(FPSTR(_name));
   if (!initDone) {
     // first run: reading from cfg.json
     pinA = newDTpin;
     pinB = newCLKpin;
     pinC = newSWpin;
-    DEBUGUM_PRINTLN(F(" config loaded."));
+    DEBUGUM_PRINTLN(F(": config loaded."));
   } else {
-    DEBUGUM_PRINTLN(F(" config (re)loaded."));
+    DEBUGUM_PRINTLN(F(": config (re)loaded."));
     // changing parameters from settings page
     if (pinA!=newDTpin || pinB!=newCLKpin || pinC!=newSWpin || pinIRQ!=newIRQpin) {
       if (oldPcf8574) {
         if (pinIRQ >= 0) {
           detachInterrupt(pinIRQ);
           PinManager::deallocatePin(pinIRQ, PinOwner::UM_RotaryEncoderUI);
-          DEBUGUM_PRINTLN(F("Deallocated old IRQ pin."));
+          DEBUGUM_PRINTLN(F(" Deallocated old IRQ pin."));
         }
         pinIRQ = newIRQpin<100 ? newIRQpin : -1; // ignore PCF8574 pins
       } else {
         PinManager::deallocatePin(pinA, PinOwner::UM_RotaryEncoderUI);
         PinManager::deallocatePin(pinB, PinOwner::UM_RotaryEncoderUI);
         PinManager::deallocatePin(pinC, PinOwner::UM_RotaryEncoderUI);
-        DEBUGUM_PRINTLN(F("Deallocated old pins."));
+        DEBUGUM_PRINTLN(F(" Deallocated old pins."));
       }
       pinA = newDTpin;
       pinB = newCLKpin;
diff --git a/wled00/FX_2Dfcn.cpp b/wled00/FX_2Dfcn.cpp
index 0e249b2f78..c9b59fee57 100644
--- a/wled00/FX_2Dfcn.cpp
+++ b/wled00/FX_2Dfcn.cpp
@@ -89,8 +89,7 @@ void WS2812FX::setUpMatrix() {
       int8_t *gapTable = nullptr;
 
       if (isFile && requestJSONBufferLock(20)) {
-        DEBUGFX_PRINT(F("Reading LED gap from "));
-        DEBUGFX_PRINTLN(fileName);
+        DEBUGFX_PRINTF_P(PSTR("Reading LED gap from %s\n"), fileName);
         // read the array into global JSON buffer
         if (readObjectFromFile(fileName, nullptr, pDoc)) {
           // the array is similar to ledmap, except it has only 3 values:
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 1cc78f71e5..769bf652fa 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -163,8 +163,7 @@ bool IRAM_ATTR_YN Segment::allocateData(size_t len) {
   deallocateData(); // if the old buffer was smaller release it first
   if (Segment::getUsedSegmentData() + len > MAX_SEGMENT_DATA) {
     // not enough memory
-    DEBUGFX_PRINT(F("!!! Effect RAM depleted: "));
-    DEBUGFX_PRINTF_P(PSTR("%d/%d !!!\n"), len, Segment::getUsedSegmentData());
+    DEBUGFX_PRINTF_P(PSTR("!!! Effect RAM depleted: %d/%d !!!\n"), len, Segment::getUsedSegmentData());
     errorFlag = ERR_NORAM;
     return false;
   }
@@ -492,10 +491,7 @@ void Segment::setUp(uint16_t i1, uint16_t i2, uint8_t grp, uint8_t spc, uint16_t
   }
   if (ofs < UINT16_MAX) offset = ofs;
 
-  DEBUGFX_PRINT(F("setUp segment: ")); DEBUGFX_PRINT(i1);
-  DEBUGFX_PRINT(','); DEBUGFX_PRINT(i2);
-  DEBUGFX_PRINT(F(" -> ")); DEBUGFX_PRINT(i1Y);
-  DEBUGFX_PRINT(','); DEBUGFX_PRINTLN(i2Y);
+  DEBUGFX_PRINTF_P(PSTR("setUp segment: %d,%d -> %d,%d\n"), (int)i1, (int)i2, (int)i1Y, (int)i2Y);
   markForReset();
   if (boundsUnchanged) return;
 
@@ -1248,13 +1244,13 @@ void WS2812FX::finalizeInit() {
         // Pin should not be already allocated, read/only or defined for current bus
         while (PinManager::isPinAllocated(defPin[j]) || !PinManager::isPinOk(defPin[j],true)) {
           if (validPin) {
-            DEBUG_PRINTLN(F("Some of the provided pins cannot be used to configure this LED output."));
+            DEBUGFX_PRINTLN(F("Some of the provided pins cannot be used to configure this LED output."));
             defPin[j] = 1; // start with GPIO1 and work upwards
             validPin = false;
           } else if (defPin[j] < WLED_NUM_PINS) {
             defPin[j]++;
           } else {
-            DEBUG_PRINTLN(F("No available pins left! Can't configure output."));
+            DEBUGFX_PRINTLN(F("No available pins left! Can't configure output."));
             return;
           }
           // is the newly assigned pin already defined or used previously?
@@ -1780,8 +1776,7 @@ void WS2812FX::loadCustomPalettes() {
 
     StaticJsonDocument<1536> pDoc; // barely enough to fit 72 numbers
     if (WLED_FS.exists(fileName)) {
-      DEBUGFX_PRINT(F("Reading palette from "));
-      DEBUGFX_PRINTLN(fileName);
+      DEBUGFX_PRINTF_P(PSTR("Reading palette from %s\n"), fileName);
 
       if (readObjectFromFile(fileName, nullptr, &pDoc)) {
         JsonArray pal = pDoc[F("palette")];
@@ -1841,7 +1836,7 @@ bool WS2812FX::deserializeMap(uint8_t n) {
   if (!isFile || !requestJSONBufferLock(7)) return false;
 
   if (!readObjectFromFile(fileName, nullptr, pDoc)) {
-    DEBUGFX_PRINT(F("ERROR Invalid ledmap in ")); DEBUGFX_PRINTLN(fileName);
+    DEBUGFX_PRINTF_P(PSTR("ERROR Invalid ledmap in %s\n"), fileName);
     releaseJSONBufferLock();
     return false; // if file does not load properly then exit
   }
@@ -1857,7 +1852,7 @@ bool WS2812FX::deserializeMap(uint8_t n) {
   customMappingTable = new uint16_t[getLengthTotal()];
 
   if (customMappingTable) {
-    DEBUGFX_PRINT(F("Reading LED map from ")); DEBUGFX_PRINTLN(fileName);
+    DEBUGFX_PRINTF_P(PSTR("Reading LED map from %s\n"), fileName);
     JsonArray map = root[F("map")];
     if (!map.isNull() && map.size()) {  // not an empty map
       customMappingSize = min((unsigned)map.size(), (unsigned)getLengthTotal());
diff --git a/wled00/util.cpp b/wled00/util.cpp
index 99a75bdd30..68027ceaaf 100644
--- a/wled00/util.cpp
+++ b/wled00/util.cpp
@@ -158,11 +158,7 @@ bool oappend(const char* txt)
 {
   unsigned len = strlen(txt);
   if ((obuf == nullptr) || (olen + len >= SETTINGS_STACK_BUF_SIZE)) { // sanity checks
-#ifdef WLED_DEBUG
-    DEBUG_PRINT(F("oappend() buffer overflow. Cannot append "));
-    DEBUG_PRINT(len); DEBUG_PRINT(F(" bytes \t\""));
-    DEBUG_PRINT(txt); DEBUG_PRINTLN(F("\""));
-#endif
+    DEBUG_PRINTF_P(PSTR("oappend() buffer overflow. Cannot append %u bytes ->\"%s\"\n"), len, txt);
     return false;        // buffer full
   }
   strcpy(obuf + olen, txt);