Revert "Revert "Revert "test"""

This reverts commit f4341fb0aa970fa6a7e4f776002021fae303054b.
Revert "Revert "Revert "Revert "test""""

This reverts commit 9c44a3155ca976377c1b7020284b693a604840e5.
Merge branch 'master' of https://github.com/ChingWang/serial_tool