Add definitions of the IRQ pin to the nrf24l01

weather-sensor/firmware/nrf24l01.h

 #define NRF_CSN_PORT  PORTD
 #define NRF_CSN_PIN   PD6
 
+#define NRF_IRQ_DDR   DDRD
+#define NRF_IRQ_PORT  PORTD
+#define NRF_IRQ_PIN   PD5
+
 void Initialize_NRF24L01(void);
 void Set_NRF24L01_Pins(void);
 void Configure_Transmission(void);