#define AO_RECOVERY_VALUE 0
#define AO_RECOVERY_MODE AO_EXTI_MODE_PULL_UP
-/* Beeper is on Tim1 CH3 */
+/* Beeper is on Tim3 CH4 */
#define BEEPER_CHANNEL 4
-#define BEEPER_TIMER 2
+#define BEEPER_TIMER 3
#define BEEPER_PORT (&stm_gpioa)
#define BEEPER_PIN 3