diff --git a/src/services/work_service.rs b/src/services/work_service.rs
index 672043f..46731d0 100644
--- a/src/services/work_service.rs
+++ b/src/services/work_service.rs
@@ -1,3 +1,4 @@
+use std::ptr::null;
 use crate::models::work_model::WorkModel;
 use crate::services::{serial_service::SerialService, sqlite_service::SqliteService, excel_service::ExcelService};
 
@@ -7,14 +8,13 @@ pub struct WorkService {
     excel_service: ExcelService,
 }
 
-impl Default for WorkService {
-    fn default() -> Self {
-        todo!()
-    }
-}
-
 impl WorkService {
 
+    pub fn get_port_names() -> Vec<String> {
+        //maybe should not use unwrap
+        return SerialService::get_ports().unwrap()
+    }
+
     fn init_excel_service(&mut self, path: String)->Result<bool, String>{
         return if let Ok(excel_service) = ExcelService::new(&path) {
             self.excel_service = excel_service;