diff --git a/mymodbus.cpp b/mymodbus.cpp
index bd53de6..7cd4289 100644
--- a/mymodbus.cpp
+++ b/mymodbus.cpp
@@ -202,7 +202,7 @@ QVector<bool> MyModbus::analReadCoil()
         return coil;
     }
 
-    quint8 byteCount = static_cast<quint8>(receive_[2]);  // 数据字节数
+    quint8 byteCount = static_cast<quint8>(receive_.at(2));  // 数据字节数
 
     // 解析每个数据字节
     for (int byteIndex = 0; byteIndex < byteCount; byteIndex++)
@@ -272,7 +272,8 @@ quint16 MyModbus::calculateCrc(const QByteArray &data)
             {
                 // 检查最低位
                 crc = (crc >> 1) ^ polynomial;  // 右移并且异或多项式
-            } else
+            }
+            else
             {
                 crc >>= 1;  // 仅右移
             }
diff --git a/serialcommunicator.cpp b/serialcommunicator.cpp
index a96ed10..8ec40ec 100644
--- a/serialcommunicator.cpp
+++ b/serialcommunicator.cpp
@@ -154,9 +154,9 @@ void SerialCommunicator::close()
         resendTimer_->stop();
         stationCheck_->stop();
         checkTimeOut_->stop();
+        emit stationConnect(false);
 
         // 清除可能存在的待处理数据
-        emit stationConnect(false);
         serialPort_->clear();
 
         // 关闭串口