diff --git a/keywords.txt b/keywords.txt
index ea6e019..f2b9a49 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -14,6 +14,7 @@ IRsend	KEYWORD1
 # Methods and Functions (KEYWORD2)
 #######################################
 
+blink13	KEYWORD2
 decode	KEYWORD2
 enableIRIn	KEYWORD2
 resume	KEYWORD2
diff --git a/src/IRremote.cpp b/src/IRremote.cpp
index c8730d7..f41f818 100644
--- a/src/IRremote.cpp
+++ b/src/IRremote.cpp
@@ -127,6 +127,7 @@ ISR (TIMER_INTR_NAME)
 {
 	TIMER_RESET;
 
+	// Read if IR Receiver -> SPACE [xmt LED off] or a MARK [xmt LED on]
 	// digitalRead() is very slow. Optimisation is possible, but makes the code unportable
 	uint8_t  irdata = (uint8_t)digitalRead(irparams.recvpin);
 
@@ -184,4 +185,14 @@ ISR (TIMER_INTR_NAME)
 		 	break;
 	}
 
+#ifdef BLINKLED
+	// If requested, flash LED while receiving IR data
+	if (irparams.blinkflag) {
+		if (irdata == MARK)
+			if (irparams.blinkpin) digitalWrite(irparams.blinkpin, HIGH); // Turn user defined pin LED on
+				else BLINKLED_ON() ;   // if no user defined LED pin, turn default LED pin for the hardware on
+		else if (irparams.blinkpin) digitalWrite(irparams.blinkpin, LOW); // Turn user defined pin LED on
+				else BLINKLED_OFF() ;   // if no user defined LED pin, turn default LED pin for the hardware on
+	}
+#endif // BLINKLED
 }
diff --git a/src/IRremote.h b/src/IRremote.h
index 40f28dc..9282843 100644
--- a/src/IRremote.h
+++ b/src/IRremote.h
@@ -172,8 +172,9 @@ class IRrecv
 {
 	public:
 		IRrecv (int recvpin) ;
-		IRrecv (int recvpin);
+		IRrecv (int recvpin, int blinkpin);
 
+		void  blink13    (int blinkflag) ;
 		int   decode     (decode_results *results) ;
 		void  enableIRIn ( ) ;
 		bool  isIdle     ( ) ;
diff --git a/src/IRremoteInt.h b/src/IRremoteInt.h
index 08f162e..1baa05d 100644
--- a/src/IRremoteInt.h
+++ b/src/IRremoteInt.h
@@ -41,6 +41,8 @@ typedef
 		// The fields are ordered to reduce memory over caused by struct-padding
 		uint8_t       rcvstate;        // State Machine state
 		uint8_t       recvpin;         // Pin connected to IR data from detector
+		uint8_t       blinkpin;
+		uint8_t       blinkflag;       // true -> enable blinking of pin on IR processing
 		uint8_t       rawlen;          // counter of entries in rawbuf
 		unsigned int  timer;           // State timer, counts 50uS ticks.
 		unsigned int  rawbuf[RAWBUF];  // raw data
diff --git a/src/boarddefs.h b/src/boarddefs.h
index 5751ba7..5c49465 100644
--- a/src/boarddefs.h
+++ b/src/boarddefs.h
@@ -47,10 +47,29 @@
 // is not configurable on the current board.
 
 //------------------------------------------------------------------------------
-// Soft Carrier fallback for SAM and SAMD architectures
+// Defines for blinking the LED
 //
 
+#if defined(CORE_LED0_PIN)
+#	define BLINKLED        CORE_LED0_PIN
+#	define BLINKLED_ON()   (digitalWrite(CORE_LED0_PIN, HIGH))
+#	define BLINKLED_OFF()  (digitalWrite(CORE_LED0_PIN, LOW))
+
+#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+#	define BLINKLED        13
+#	define BLINKLED_ON()   (PORTB |= B10000000)
+#	define BLINKLED_OFF()  (PORTB &= B01111111)
+
+#elif defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644__)
+#	define BLINKLED        0
+#	define BLINKLED_ON()   (PORTD |= B00000001)
+#	define BLINKLED_OFF()  (PORTD &= B11111110)
+
 #elif defined(ARDUINO_ARCH_SAM) || defined(ARDUINO_ARCH_SAMD)
+#	define BLINKLED        LED_BUILTIN
+#	define BLINKLED_ON()   (digitalWrite(LED_BUILTIN, HIGH))
+#	define BLINKLED_OFF()  (digitalWrite(LED_BUILTIN, LOW))
+
 #	define USE_SOFT_CARRIER
 	// Define to use spin wait instead of delayMicros()
 //#	define USE_SPIN_WAIT
@@ -60,6 +79,8 @@
 #	define SEND_PIN 9
 
 #elif defined(ESP32)
+        // No system LED on ESP32, disable blinking by NOT defining BLINKLED
+
         // avr/interrupt.h is not present
 #       undef HAS_AVR_INTERRUPT_H
 
@@ -69,6 +90,10 @@
         // Supply own enbleIRIn
 #       undef USE_DEFAULT_ENABLE_IR_IN
 
+#else
+#	define BLINKLED        13
+#	define BLINKLED_ON()  (PORTB |= B00100000)
+#	define BLINKLED_OFF()  (PORTB &= B11011111)
 #endif
 
 //------------------------------------------------------------------------------
diff --git a/src/irRecv.cpp b/src/irRecv.cpp
index 8498e16..b549dac 100644
--- a/src/irRecv.cpp
+++ b/src/irRecv.cpp
@@ -99,11 +99,15 @@ int  IRrecv::decode (decode_results *results)
 IRrecv::IRrecv (int recvpin)
 {
 	irparams.recvpin = recvpin;
+	irparams.blinkflag = 0;
 }
 
-IRrecv::IRrecv (int recvpin)
+IRrecv::IRrecv (int recvpin, int blinkpin)
 {
 	irparams.recvpin = recvpin;
+	irparams.blinkpin = blinkpin;
+	pinMode(blinkpin, OUTPUT);
+	irparams.blinkflag = 0;
 }
 
 
@@ -138,6 +142,17 @@ void  IRrecv::enableIRIn ( )
 }
 #endif // USE_DEFAULT_ENABLE_IR_IN
 
+//+=============================================================================
+// Enable/disable blinking of pin 13 on IR processing
+//
+void  IRrecv::blink13 (int blinkflag)
+{
+#ifdef BLINKLED
+	irparams.blinkflag = blinkflag;
+	if (blinkflag)  pinMode(BLINKLED, OUTPUT) ;
+#endif
+}
+
 //+=============================================================================
 // Return if receiving new IR signals
 //