diff --git a/utils/btls/bleHandler.js b/utils/btls/bleHandler.js
index a12dadf..60b2d11 100644
--- a/utils/btls/bleHandler.js
+++ b/utils/btls/bleHandler.js
@@ -290,7 +290,7 @@ class BLEHandler {
              }
 			 
 		        //数据解密
-        key = arrbf[3];
+        let key = arrbf[3];
 		let  data_offset = 12;
 		
 		let result = new Uint8Array(dataLength)