diff --git a/miniprogram/lefu/service.ts b/miniprogram/lefu/service.ts
index d2753d7..3c50c23 100644
--- a/miniprogram/lefu/service.ts
+++ b/miniprogram/lefu/service.ts
@@ -156,7 +156,10 @@ class LeFuService {
             this._connectState = plugin.BLUE_STATE.CONNECTSUCCESS
             this._activeProtocol.codeUpdateMTU((mtuRes: any) => {
                 console.log(TAG, 'codeUpdateMTU:', mtuRes)
-                this._onDeviceConnectCb?.()
+                this._activeProtocol.codeSyncTime((syncRes: any) => {
+                    console.log(TAG, 'codeSyncTime:', syncRes)
+                    this._onDeviceConnectCb?.()
+                })
             })
         })