diff --git a/apps/em/cd.py b/apps/em/cd.py
index 73592048..63f05f4f 100644
--- a/apps/em/cd.py
+++ b/apps/em/cd.py
@@ -16,7 +16,7 @@ def get_checksum(body_msg):
 
 def handle_bytes(arr):
     if len(arr) < 8:
-        return "返回数据长度错误"
+        return f"返回数据长度错误-{arr}"
     
     if arr[0] != 0xEB or arr[1] != 0x90:
         return "数据头不正确"
@@ -208,3 +208,36 @@ def get_tyy_data(*args, retry=1):
             raise ParseError(f'采集器返回数据错误-{res}')
         else:
             return res
+
+
+def get_tyy_data_3(*args, retry=2):
+    host, port = args[0], int(args[1])
+    for attempt in range(retry):
+        try:
+            # 每次请求都新建连接（确保无共享状态）
+            with socket.create_connection((host, port), timeout=10) as sc:
+                sc.sendall(b"R")
+                
+                # 接收完整响应（避免数据不完整）
+                # resp = b""
+                # while True:
+                #     chunk = sc.recv(4096)
+                #     if not chunk:
+                #         break
+                #     resp += chunk
+                resp = sc.recv(4096)
+                if not resp:
+                    raise ParseError("设备未启动")
+                
+                res = handle_bytes(resp)
+                if isinstance(res, str):
+                    raise ParseError(f"采集器返回数据错误: {res}")
+                return res
+        except (socket.timeout, ConnectionError) as e:
+            if attempt == retry - 1:  # 最后一次尝试失败才报错
+                raise ParseError(f"采集器连接失败: {str(e)}")
+            time.sleep(0.5)  # 失败后等待 1s 再重试
+        except ParseError:
+            raise
+        except Exception as e:
+            raise ParseError(f"未知错误: {str(e)}")
\ No newline at end of file