diff --git a/DeviceCommand/Base/Serial_Port.cs b/DeviceCommand/Base/Serial_Port.cs
index 1d73cb0..19f9b9c 100644
--- a/DeviceCommand/Base/Serial_Port.cs
+++ b/DeviceCommand/Base/Serial_Port.cs
@@ -223,5 +223,59 @@ namespace DeviceCommand.Base
             }
             commLock?.Dispose();
         }
+
+        // 在 Serial_Port 类中添加以下方法：
+
+        /// <summary>
+        /// 发送原始二进制数据帧（无分隔符，用于IT6720等自定义二进制协议）
+        /// </summary>
+        public async Task WriteBytesAsync(byte[] data, CancellationToken ct = default)
+        {
+            await commLock.WaitAsync(ct);
+            try
+            {
+                if (!_serialPort.IsOpen) throw new InvalidOperationException("串口未打开。");
+                await _serialPort.BaseStream.WriteAsync(data, 0, data.Length, ct).ConfigureAwait(false);
+            }
+            finally
+            {
+                commLock.Release();
+            }
+        }
+
+        /// <summary>
+        /// 读取指定长度的原始二进制数据帧（无分隔符）
+        /// </summary>
+        public async Task<byte[]> ReadBytesAsync(int count, CancellationToken ct = default)
+        {
+            await commLock.WaitAsync(ct);
+            try
+            {
+                if (!_serialPort.IsOpen) throw new InvalidOperationException("串口未打开。");
+                if (count <= 0) return Array.Empty<byte>();
+
+                byte[] buffer = new byte[count];
+                int offset = 0;
+                while (offset < count)
+                {
+                    ct.ThrowIfCancellationRequested();
+                    int read = await _serialPort.BaseStream.ReadAsync(buffer, offset, count - offset, ct)
+                                               .WaitAsync(TimeSpan.FromMilliseconds(ReadTimeout), ct)
+                                               .ConfigureAwait(false);
+                    if (read == 0) throw new EndOfStreamException("串口读取数据流意外终止");
+                    offset += read;
+                }
+                return buffer;
+            }
+            catch (TimeoutException ex)
+            {
+                ClearHardwareBuffer();
+                throw new TimeoutException($"串口读取 {count} 字节二进制数据超时 ({ReadTimeout} ms)", ex);
+            }
+            finally
+            {
+                commLock.Release();
+            }
+        }
     }
 }
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