diff --git a/modules/alarm/buzzer.c b/modules/alarm/buzzer.c
new file mode 100644
index 0000000..b768058
--- /dev/null
+++ b/modules/alarm/buzzer.c
@@ -0,0 +1,88 @@
+#include "bsp_pwm.h"
+#include "buzzer.h"
+#include "bsp_dwt.h"
+
+static PWMInstance *buzzer;
+
+static alarm_level_e now_alarm_level = ALARM_OFFLINE;
+
+void BuzzerOn(PWMInstance *buzzer );
+/**
+*
+* @brief 蜂鸣器报警函数
+* @param alarm_level 报警级别
+*/
+void BuzzerPlay(alarm_level_e alarm_level)
+{
+    static alarm_level_e last_alarm_level = ALARM_LEVEL_LOW;
+    
+    if(((int)DWT_GetTimeline_s() % 5)<1) //每5秒检查一次
+    {
+        last_alarm_level = ALARM_LEVEL_LOW;
+        now_alarm_level = ALARM_OFFLINE;
+    }
+    
+    if(last_alarm_level <= now_alarm_level) //如果当前报警级别大于等于上一次报警级别,则更新报警级别
+    {
+        now_alarm_level = alarm_level;
+    }
+    last_alarm_level = alarm_level;
+
+}
+
+/**
+ * @brief 蜂鸣器初始化
+ * 
+ */
+void buzzer_init()
+{
+    PWM_Init_Config_s buzzer_config = {
+        .htim = &htim4,
+        .channel= TIM_CHANNEL_3,
+        .period = 1,
+        .pulse = 10000,
+        .callback = BuzzerOn,
+    };
+    buzzer = PWMRegister(&buzzer_config);
+}
+/**
+ * @brief 开启蜂鸣器
+ * 
+ * @param buzzer 
+ */
+//*@todo: 优化报警声，应类似D__,DDD,B__,BBB等报警声
+void BuzzerOn(PWMInstance *buzzer )
+{
+    switch (now_alarm_level)
+    {
+    case ALARM_LEVEL_LOW:
+        PWMSetPeriod(buzzer, 1);
+        PWMSetPulse(buzzer, 10000);
+        break;
+    case ALARM_LEVEL_BELOW_MEDIUM:
+        PWMSetPeriod(buzzer, 2);
+        PWMSetPulse(buzzer, 10000);
+        break;
+    case ALARM_LEVEL_MEDIUM:
+        PWMSetPeriod(buzzer, 3);
+        PWMSetPulse(buzzer, 10000);
+        break;
+    case ALARM_LEVEL_ABOVE_MEDIUM:
+        PWMSetPeriod(buzzer, 4);
+        PWMSetPulse(buzzer, 10000);
+        break;
+    case ALARM_LEVEL_HIGH:
+        PWMSetPeriod(buzzer, 5);
+        PWMSetPulse(buzzer, 10000);
+        break;
+    
+    default:
+        PWMSetPulse(buzzer, 0);
+        break;
+    }
+}
+
+
+
+
+
diff --git a/modules/alarm/buzzer.h b/modules/alarm/buzzer.h
new file mode 100644
index 0000000..3a8668e
--- /dev/null
+++ b/modules/alarm/buzzer.h
@@ -0,0 +1,7 @@
+#ifndef BUZZER_H
+#define BUZZER_H
+#include "daemon.h"
+void buzzer_init();
+
+
+#endif // !BUZZER_H