diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..35943f7
Binary files /dev/null and b/.DS_Store differ
diff --git a/modbus.rb b/modbus.rb
index 0ef6e52..77c989b 100644
--- a/modbus.rb
+++ b/modbus.rb
@@ -22,13 +22,13 @@ begin
     end
   end
 rescue
-  # error_message = "[#{Time.now}] #{mode} 실행 실패 (station_id: #{controller_id}, value: #{value})"
-  # res = Sms.send_one(
-  #   {
-  #     to:   '01062619801',
-  #     from: '01062619801',
-  #     text: error_message
-  #   }
-  # )
-  # puts res
+  error_message = "[#{Time.now}] #{mode} 실행 실패 (station_id: #{controller_id}, value: #{value})"
+  res = Sms.send_one(
+    {
+      to:   '01062619801',
+      from: '01062619801',
+      text: error_message
+    }
+  )
+  puts res
 end