diff --git a/keywords.txt b/keywords.txt
index 150f81f9..9aabb1c0 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -175,7 +175,7 @@ shutdown	KEYWORD2
 # Constants (LITERAL1)
 #######################################
 
-RADIOLIB_PIN_UNUSED	LITERAL1
+NC	LITERAL1
 RADIOLIB_VERSION	LITERAL1
 
 ERR_NONE	LITERAL1
diff --git a/src/Module.cpp b/src/Module.cpp
index d1b1f136..27181535 100644
--- a/src/Module.cpp
+++ b/src/Module.cpp
@@ -1,10 +1,10 @@
 #include "Module.h"
 
 Module::Module(int16_t rx, int16_t tx, HardwareSerial* useSer, int16_t rst) {
-  _cs = RADIOLIB_PIN_UNUSED;
+  _cs = NC;
   _rx = rx;
   _tx = tx;
-  _irq = RADIOLIB_PIN_UNUSED;
+  _irq = NC;
   _rst = rst;
 
 #ifdef RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED
@@ -17,8 +17,8 @@ Module::Module(int16_t rx, int16_t tx, HardwareSerial* useSer, int16_t rst) {
 
 Module::Module(int16_t cs, int16_t irq, int16_t rst, SPIClass& spi, SPISettings spiSettings) {
   _cs = cs;
-  _rx = RADIOLIB_PIN_UNUSED;
-  _tx = RADIOLIB_PIN_UNUSED;
+  _rx = NC;
+  _tx = NC;
   _irq = irq;
   _rst = rst;
   _spi = &spi;
@@ -28,7 +28,7 @@ Module::Module(int16_t cs, int16_t irq, int16_t rst, SPIClass& spi, SPISettings
 Module::Module(int16_t cs, int16_t irq, int16_t rst, int16_t gpio, SPIClass& spi, SPISettings spiSettings) {
   _cs = cs;
   _rx = gpio;
-  _tx = RADIOLIB_PIN_UNUSED;
+  _tx = NC;
   _irq = irq;
   _rst = rst;
   _spi = &spi;
@@ -205,10 +205,16 @@ void Module::SPItransfer(uint8_t cmd, uint8_t reg, uint8_t* dataOut, uint8_t* da
 
   // send SPI register address with access command
   _spi->transfer(reg | cmd);
-  RADIOLIB_VERBOSE_PRINT(reg | cmd, HEX);
-  RADIOLIB_VERBOSE_PRINT('\t');
-  RADIOLIB_VERBOSE_PRINT(reg | cmd, BIN);
-  RADIOLIB_VERBOSE_PRINT('\t');
+  #ifdef RADIOLIB_VERBOSE
+    if(cmd == SPIwriteCommand) {
+      RADIOLIB_VERBOSE_PRINT('W');
+    } else if(cmd == SPIreadCommand) {
+      RADIOLIB_VERBOSE_PRINT('R');
+    }
+    RADIOLIB_VERBOSE_PRINT('\t')
+    RADIOLIB_VERBOSE_PRINT(reg, HEX);
+    RADIOLIB_VERBOSE_PRINT('\t');
+  #endif
 
   // send data or get response
   if(cmd == SPIwriteCommand) {
@@ -216,16 +222,12 @@ void Module::SPItransfer(uint8_t cmd, uint8_t reg, uint8_t* dataOut, uint8_t* da
       _spi->transfer(dataOut[n]);
       RADIOLIB_VERBOSE_PRINT(dataOut[n], HEX);
       RADIOLIB_VERBOSE_PRINT('\t');
-      RADIOLIB_VERBOSE_PRINT(dataOut[n], BIN);
-      RADIOLIB_VERBOSE_PRINT('\t');
     }
   } else if (cmd == SPIreadCommand) {
     for(size_t n = 0; n < numBytes; n++) {
       dataIn[n] = _spi->transfer(0x00);
       RADIOLIB_VERBOSE_PRINT(dataIn[n], HEX);
       RADIOLIB_VERBOSE_PRINT('\t');
-      RADIOLIB_VERBOSE_PRINT(dataIn[n], BIN);
-      RADIOLIB_VERBOSE_PRINT('\t');
     }
   }
   RADIOLIB_VERBOSE_PRINTLN();
@@ -238,13 +240,13 @@ void Module::SPItransfer(uint8_t cmd, uint8_t reg, uint8_t* dataOut, uint8_t* da
 }
 
 void Module::pinMode(int16_t pin, uint8_t mode) {
-  if(pin != RADIOLIB_PIN_UNUSED) {
+  if(pin != NC) {
     ::pinMode(pin, mode);
   }
 }
 
 void Module::digitalWrite(int16_t pin, uint8_t value) {
-  if(pin != RADIOLIB_PIN_UNUSED) {
+  if(pin != NC) {
     ::digitalWrite(pin, value);
   }
 }
diff --git a/src/TypeDef.h b/src/TypeDef.h
index 90b417c5..69ea2fc2 100644
--- a/src/TypeDef.h
+++ b/src/TypeDef.h
@@ -75,9 +75,11 @@
 #endif
 
 /*!
-  \brief Alias for unused pin.
+  \brief Alias for unused pin, if not supplied by the Arduino core.
 */
-#define RADIOLIB_PIN_UNUSED                           (-1)
+#ifndef NC
+#define NC                                            (-1)
+#endif
 
 /*!
   \defgroup shield_config Shield Configuration
diff --git a/src/modules/CC1101/CC1101.cpp b/src/modules/CC1101/CC1101.cpp
index d9d7e048..6e3fc053 100644
--- a/src/modules/CC1101/CC1101.cpp
+++ b/src/modules/CC1101/CC1101.cpp
@@ -196,7 +196,7 @@ void CC1101::clearGdo0Action() {
 }
 
 void CC1101::setGdo2Action(void (*func)(void), uint8_t dir) {
-  if(_mod->getGpio() != RADIOLIB_PIN_UNUSED) {
+  if(_mod->getGpio() != NC) {
     return;
   }
   Module::pinMode(_mod->getGpio(), INPUT);
@@ -204,7 +204,7 @@ void CC1101::setGdo2Action(void (*func)(void), uint8_t dir) {
 }
 
 void CC1101::clearGdo2Action() {
-  if(_mod->getGpio() != RADIOLIB_PIN_UNUSED) {
+  if(_mod->getGpio() != NC) {
     return;
   }
   detachInterrupt(digitalPinToInterrupt(_mod->getGpio()));
diff --git a/src/modules/RF69/RF69.cpp b/src/modules/RF69/RF69.cpp
index 76150d4d..9f1b9544 100644
--- a/src/modules/RF69/RF69.cpp
+++ b/src/modules/RF69/RF69.cpp
@@ -268,7 +268,7 @@ void RF69::clearDio0Action() {
 }
 
 void RF69::setDio1Action(void (*func)(void)) {
-  if(_mod->getGpio() != RADIOLIB_PIN_UNUSED) {
+  if(_mod->getGpio() != NC) {
     return;
   }
   Module::pinMode(_mod->getGpio(), INPUT);
@@ -276,7 +276,7 @@ void RF69::setDio1Action(void (*func)(void)) {
 }
 
 void RF69::clearDio1Action() {
-  if(_mod->getGpio() != RADIOLIB_PIN_UNUSED) {
+  if(_mod->getGpio() != NC) {
     return;
   }
   detachInterrupt(digitalPinToInterrupt(_mod->getGpio()));
diff --git a/src/modules/SX127x/SX127x.cpp b/src/modules/SX127x/SX127x.cpp
index 3098f63e..60f63b2f 100644
--- a/src/modules/SX127x/SX127x.cpp
+++ b/src/modules/SX127x/SX127x.cpp
@@ -437,11 +437,14 @@ void SX127x::clearDio0Action() {
 }
 
 void SX127x::setDio1Action(void (*func)(void)) {
+  if(_mod->getGpio() != NC) {
+    return;
+  }
   attachInterrupt(digitalPinToInterrupt(_mod->getGpio()), func, RISING);
 }
 
 void SX127x::clearDio1Action() {
-  if(_mod->getGpio() != RADIOLIB_PIN_UNUSED) {
+  if(_mod->getGpio() != NC) {
     return;
   }
   detachInterrupt(digitalPinToInterrupt(_mod->getGpio()));