-#pragma once
-
-/* Soft Serial defines */
-#define SERIAL_PIN_DDR DDRD
-#define SERIAL_PIN_PORT PORTD
-#define SERIAL_PIN_INPUT PIND
-#define SERIAL_PIN_MASK _BV(PD2)
-#define SERIAL_PIN_INTERRUPT INT2_vect
-
+#ifndef SOFT_SERIAL_PIN
+#define SOFT_SERIAL_PIN D2
#define SERIAL_USE_MULTI_TRANSACTION
+#endif