diff --git a/route/api/modbus.js b/route/api/modbus.js
index 92834ae..aab8360 100644
--- a/route/api/modbus.js
+++ b/route/api/modbus.js
@@ -597,7 +597,7 @@ router
             record: []
         };
         exec(cmd, (err, stdout, stderr) => {
-            let msg =  err ? err.toString() : stdout;
+            let msg =  err ? err.toString() : `${stdout}${stderr}`;
             res.api_res.record.push({msg});
 
             n();