diff --git a/Marlin/src/libs/MAX31865.cpp b/Marlin/src/libs/MAX31865.cpp
index 2ceb8a98cb2e..f08e4f9fd892 100644
--- a/Marlin/src/libs/MAX31865.cpp
+++ b/Marlin/src/libs/MAX31865.cpp
@@ -51,17 +51,15 @@
 //#include <SoftwareSPI.h> // TODO: switch to SPIclass/SoftSPI
 #include "MAX31865.h"
 
+#ifdef TARGET_LPC1768
+  #include <SoftwareSPI.h>
+#endif
+
 // The maximum speed the MAX31865 can do is 5 MHz
 SPISettings MAX31865::spiConfig = SPISettings(
-  #if defined(TARGET_LPC1768)
-    SPI_QUARTER_SPEED
-  #elif defined(ARDUINO_ARCH_STM32)
-    SPI_CLOCK_DIV4
-  #else
-    500000
-  #endif
-  , MSBFIRST
-  , SPI_MODE1 // CPOL0 CPHA1
+  TERN(TARGET_LPC1768, SPI_QUARTER_SPEED, TERN(ARDUINO_ARCH_STM32, SPI_CLOCK_DIV4, 500000)),
+  MSBFIRST,
+  SPI_MODE1 // CPOL0 CPHA1
 );
 
 #ifndef LARGE_PINMAP
@@ -93,7 +91,7 @@ SPISettings MAX31865::spiConfig = SPISettings(
     _sclk = _miso = _mosi = -1;
   }
 
-#else
+#else // LARGE_PINMAP
 
   /**
    * Create the interface object using software (bitbang) SPI for PIN values
@@ -106,9 +104,7 @@ SPISettings MAX31865::spiConfig = SPISettings(
    * @param spi_clk      the SPI clock pin to use
    * @param pin_mapping  set to 1 for positive pin values
    */
-  MAX31865::MAX31865(uint32_t spi_cs, uint32_t spi_mosi,
-                     uint32_t spi_miso, uint32_t spi_clk,
-                     uint8_t pin_mapping) {
+  MAX31865::MAX31865(uint32_t spi_cs, uint32_t spi_mosi, uint32_t spi_miso, uint32_t spi_clk, uint8_t pin_mapping) {
     _cs = spi_cs;
     _mosi = spi_mosi;
     _miso = spi_miso;
@@ -130,14 +126,12 @@ SPISettings MAX31865::spiConfig = SPISettings(
 
 #endif // LARGE_PINMAP
 
-
 /**
  *
  * Instance & Class methods
  *
  */
 
-
 /**
  * Initialize the SPI interface and set the number of RTD wires used
  *
@@ -152,18 +146,13 @@ void MAX31865::begin(max31865_numwires_t wires, float zero, float ref) {
   OUT_WRITE(_cs, HIGH);
 
   if (_sclk != TERN(LARGE_PINMAP, -1UL, -1)) {
-    // Define pin modes for Software SPI
-    #ifdef MAX31865_DEBUG
-      SERIAL_ECHOLN("Initializing MAX31865 Software SPI");
-    #endif    
-    softSpiBegin();    
-  } else {
-    // start and configure hardware SPI
+    softSpiBegin(); // Define pin modes for Software SPI
+  }
+  else {
     #ifdef MAX31865_DEBUG
-      SERIAL_ECHOLN("Initializing MAX31865 Hardware SPI");
+      SERIAL_ECHOLNPGM("Initializing MAX31865 Hardware SPI");
     #endif
-
-    SPI.begin();
+    SPI.begin();    // Start and configure hardware SPI
   }
 
   setWires(wires);
@@ -172,25 +161,15 @@ void MAX31865::begin(max31865_numwires_t wires, float zero, float ref) {
   clearFault();
 
   #ifdef MAX31865_DEBUG_SPI
-    #ifndef LARGE_PINMAP
-      SERIAL_ECHOLNPAIR(
-        "Regular begin call with _cs: ", _cs,
-        " _miso: ", _miso,
-        " _sclk: ", _sclk,
-        " _mosi: ", _mosi
-      );
-    #else
-      SERIAL_ECHOLNPAIR(
-        "LARGE_PINMAP begin call with _cs: ", _cs,
-        " _miso: ", _miso,
-        " _sclk: ", _sclk,
-        " _mosi: ", _mosi
-      );
-    #endif // LARGE_PINMAP
-
-    SERIAL_ECHOLNPAIR("config: ", readRegister8(MAX31856_CONFIG_REG));
-    SERIAL_EOL();
-  #endif // MAX31865_DEBUG_SPI
+    SERIAL_ECHOLNPAIR(
+      TERN(LARGE_PINMAP, "LARGE_PINMAP", "Regular")
+      " begin call with _cs: ", _cs,
+      " _miso: ", _miso,
+      " _sclk: ", _sclk,
+      " _mosi: ", _mosi,
+      " config: ", readRegister8(MAX31856_CONFIG_REG)
+    );
+  #endif
 }
 
 /**
@@ -367,7 +346,6 @@ float MAX31865::temperature(float Rrtd) {
 // private:
 //
 
-
 /**
  * Set a value in the configuration register.
  *
@@ -483,41 +461,34 @@ uint8_t MAX31865::spixfer(uint8_t x) {
   return softSpiTransfer(x);
 }
 
-#endif // HAS_MAX31865 && !LIB_USR_MAX31865
-
-#ifdef TARGET_LPC1768
-
-#include <SoftwareSPI.h>
-
-void MAX31865::softSpiBegin() {
-  swSpiBegin(_sclk, _miso, _mosi);
-  _spi_speed = swSpiInit(SPI_QUARTER_SPEED, _sclk, _mosi);
-}
-
-uint8_t MAX31865::softSpiTransfer(uint8_t x) {
-    return swSpiTransfer(x, _spi_speed, _sclk, _miso, _mosi);
-}
-
-#else
-
 void MAX31865::softSpiBegin() {
+  #ifdef MAX31865_DEBUG
+    SERIAL_ECHOLNPGM("Initializing MAX31865 Software SPI");
+  #endif
+  #ifdef TARGET_LPC1768
+    swSpiBegin(_sclk, _miso, _mosi);
+    _spi_speed = swSpiInit(SPI_QUARTER_SPEED, _sclk, _mosi);
+  #else
     OUT_WRITE(_sclk, LOW);
     SET_OUTPUT(_mosi);
     SET_INPUT(_miso);
+  #endif
 }
 
 uint8_t MAX31865::softSpiTransfer(uint8_t x) {
-  uint8_t reply = 0;
-  for (int i = 7; i >= 0; i--) {
-    reply <<= 1;
-    WRITE(_sclk, HIGH);
-    WRITE(_mosi, x & (1 << i));
-    WRITE(_sclk, LOW);
-    if (READ(_miso))
-      reply |= 1;
-  }
-
-  return reply;
+  #ifdef TARGET_LPC1768
+    return swSpiTransfer(x, _spi_speed, _sclk, _miso, _mosi);
+  #else
+    uint8_t reply = 0;
+    for (int i = 7; i >= 0; i--) {
+      reply <<= 1;
+      WRITE(_sclk, HIGH);           // TODO: Delay?
+      WRITE(_mosi, x & (1 << i));   // TODO: Delay?
+      WRITE(_sclk, LOW);            // TODO: Delay?
+      if (READ(_miso)) reply |= 1;
+    }
+    return reply;
+  #endif
 }
 
-#endif
+#endif // HAS_MAX31865 && !USE_ADAFRUIT_MAX31865