AP_Notify: New parameter to enable/disable buzzer

libraries/AP_Notify/AP_Notify.cpp

@@ -41,6 +41,13 @@ const AP_Param::GroupInfo AP_Notify::var_info[] = {
     // @User: Advanced
     AP_GROUPINFO("LED_BRIGHT", 0, AP_Notify, _rgb_led_brightness, RGB_LED_HIGH),
 
+    // @Param: BUZZ_ENABLE
+    // @DisplayName: Buzzer enable
+    // @Description: Enable or disable the buzzer. Only for Linux and PX4 based boards.
+    // @Values: 0:Disable,1:Enable
+    // @User: Advanced
+    AP_GROUPINFO("BUZZ_ENABLE", 1, AP_Notify, _buzzer_enable, BUZZER_ON),
+
     AP_GROUPEND
 };
 

libraries/AP_Notify/AP_Notify.h

@@ -31,6 +31,8 @@
 #define RGB_LED_LOW     1
 #define RGB_LED_MEDIUM  2
 #define RGB_LED_HIGH    3
+#define BUZZER_ON       1
+#define BUZZER_OFF      0
 
 class AP_Notify
 {
@@ -97,8 +99,10 @@ public:
 
     static const struct AP_Param::GroupInfo var_info[];
 
+    bool buzzer_enabled() const { return _buzzer_enable; }
 private:
     static NotifyDevice* _devices[];
 
     AP_Int8 _rgb_led_brightness;
+    AP_Int8 _buzzer_enable;
 };