From c00cbcf0760346b1fcd563ee44963a137a0a85c6 Mon Sep 17 00:00:00 2001
From: pepevalbe <pepevalbe@gmail.com>
Date: Thu, 31 Mar 2016 20:19:52 +0200
Subject: [PATCH] AP_Notify: enable/disable buzzer in PX4 based boards

---
 libraries/AP_Notify/ToneAlarm_PX4.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libraries/AP_Notify/ToneAlarm_PX4.cpp b/libraries/AP_Notify/ToneAlarm_PX4.cpp
index 97ddf0063d..e66b971aeb 100644
--- a/libraries/AP_Notify/ToneAlarm_PX4.cpp
+++ b/libraries/AP_Notify/ToneAlarm_PX4.cpp
@@ -134,6 +134,11 @@ void ToneAlarm_PX4::update()
         return;
     }
 
+    // exit if buzzer is not enabled
+    if (pNotify->buzzer_enabled() == false) {
+        return;
+    }
+
     check_cont_tone();
 
     if (AP_Notify::flags.compass_cal_running != flags.compass_cal_running) {