+#define BUZZER_BIT 0
+#define BUZZER_ON() PORTB |= _BV(BUZZER_BIT)
+#define BUZZER_OFF() PORTB &= (~_BV(BUZZER_BIT))
+
+#define RADIO_BIT 2
+#define RADIO_READ() (!!(PINB & (_BV(RADIO_BIT))))
+
+#define BUTTON_BIT 3
+#define BUTTON_IS_PRESSED() (!!(PINB & (_BV(BUTTON_BIT))))
+
+#define LED_BIT 4
+#define LED_ON() PORTB |= _BV(LED_BIT)
+#define LED_OFF() PORTB &= (~_BV(LED_BIT))