add specific pinout for RF on arduino mega

config_RF.h

@@ -69,10 +69,13 @@ RF supported protocols
 /*-------------------PIN DEFINITIONS----------------------*/
 #ifdef ESP8266
     #define RF_RECEIVER_PIN 0 // D3 on nodemcu
-    #define RF_EMITTER_PIN 3 // RX on nodemcu if it doesn't work with 3, try with 4 (D2)
-#elif defined(ESP32)
+    #define RF_EMITTER_PIN 4 // RX on nodemcu if it doesn't work with 3, try with 4 (D2)
+#elif ESP32
     #define RF_RECEIVER_PIN 13 // D13 on DOIT ESP32
     #define RF_EMITTER_PIN 12 // D12 on DOIT ESP32
+#elif __AVR_ATmega2560__
+    #define RF_RECEIVER_PIN 1  //1 = D3 on mega
+    #define RF_EMITTER_PIN 4 
 #else
     //IMPORTANT NOTE: On arduino UNO connect IR emitter pin to D9 , comment #define IR_USE_TIMER2 and uncomment #define IR_USE_TIMER1 on library <library>IRremote/boarddefs.h so as to free pin D3 for RF RECEIVER PIN
     //RF PIN definition