diff --git a/.vscode/settings.json b/.vscode/settings.json
index 025ba1c..014cb14 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -82,6 +82,7 @@
         "math.h": "c",
         "ctime": "c",
         "bsp_wdg.h": "c",
-        "rtdbg.h": "c"
+        "rtdbg.h": "c",
+        "bsp_rng.h": "c"
     }
 }
diff --git a/bsp/inc/bsp_mq.h b/bsp/inc/bsp_mq.h
index c762ea5..9589636 100644
--- a/bsp/inc/bsp_mq.h
+++ b/bsp/inc/bsp_mq.h
@@ -44,7 +44,7 @@
 #define MQ_VOLTAGE_RATIO            (1.74F)
 
 // adc voltage 1000x
-#define MQ_VOLTAGE_HIGH_LIMIT       (4096U)
+#define MQ_VOLTAGE_HIGH_LIMIT       (4095U)
 #define MQ_VOLTAGE_LOW_LIMIT        (100U)
 
 #define MQ_VOLTAGE_ALARM_DEFAULT    (uint16_t)(2250U)
diff --git a/bsp/src/bsp_mq.c b/bsp/src/bsp_mq.c
index 9decd19..a435532 100644
--- a/bsp/src/bsp_mq.c
+++ b/bsp/src/bsp_mq.c
@@ -2,7 +2,7 @@
  * @Author       : stark1898y 1658608470@qq.com
  * @Date         : 2024-06-18 15:48:01
  * @LastEditors: mbw && 1600520629@qq.com
- * @LastEditTime: 2025-06-23 13:55:13
+ * @LastEditTime: 2025-06-23 14:04:29
  * @FilePath: \ble_bjq_ch303rct6_ml307\bsp\src\bsp_mq.c
  * @Description  :
  *
@@ -125,16 +125,16 @@ static uint8_t Sensor_CheckData(void)
     static rt_uint8_t index                                     = 0;
     rt_uint16_t voltage                                         = Get_Gas_VoltageAdcInt1000x();
 
-    if(alarm_flag)
+    if(alarm_flag)//检测到报警后的报警恢复，降低其阈值
     {
-        alarm_status_buffer[index] = ((voltage > (Sensor_device.alarm_value - 500)) && (voltage < MQ_VOLTAGE_HIGH_LIMIT)) ? kSensorAlarm : kSensorNormal;
+        alarm_status_buffer[index] = (((voltage > (Sensor_device.alarm_value - 500)) && (voltage < MQ_VOLTAGE_HIGH_LIMIT)) ? kSensorAlarm : kSensorNormal);
     }
     else
     {
-        alarm_status_buffer[index] = ((voltage > Sensor_device.alarm_value) && (voltage < MQ_VOLTAGE_HIGH_LIMIT)) ? kSensorAlarm : kSensorNormal;
+        alarm_status_buffer[index] = (((voltage > Sensor_device.alarm_value) && (voltage < MQ_VOLTAGE_HIGH_LIMIT)) ? kSensorAlarm : kSensorNormal);
     }
 
-    fault_buf[index]           = ((voltage < MQ_VOLTAGE_LOW_LIMIT) || (voltage > MQ_VOLTAGE_HIGH_LIMIT)) ? kSensorFault : kSensorNormal;
+    fault_buf[index]           = (((voltage < MQ_VOLTAGE_LOW_LIMIT) || (voltage > MQ_VOLTAGE_HIGH_LIMIT)) ? kSensorFault : kSensorNormal);
     index++;
     if (index >= SENSOR_SAMPLING_TIMS)
     {
@@ -193,16 +193,16 @@ static void Sensor_detection_thread_entry(void *param)
     while (1)//等待标定
     {
         calibration_flag = Flash_Get_Calibration_State();
-        if(calibration_flag == 1)
+        if(calibration_flag == kSysGasCalibStatus)
         break;
         rt_thread_mdelay(1000);
         Get_Gas_VoltageAdcInt1000x();
     }
 
     rt_uint16_t alarm_value = Flash_Get_SysCfg(kAlarmLValueId); // 获取系统报警阈值;
-    if ((alarm_value > 4095)||(alarm_value < 300))
+    if ((alarm_value > 4095)||(alarm_value < 1000))
     {
-        alarm_value = 3400;
+        alarm_value = 2250;
     }
     Sensor_device.alarm_value = alarm_value;
     LOG_D("报警阈值:%d", Sensor_device.alarm_value);