Andrew Svetlov <andrew.svet...@gmail.com> added the comment: Looking on serial port support in twisted (https://github.com/twisted/twisted/blob/trunk/src/twisted/internet/_win32serialport.py) I see that it is implemented by OVERLAPPED structure and ReadFile/WriterFile calls.
On other hand loop.sock_send() in ProactorEventLoop uses Proactor.send() (https://github.com/python/cpython/blob/master/Lib/asyncio/windows_events.py#L457). The method calls WriteFile is sock is not socket.socket instance. Did you check if `loop.sock_send()`/`loop.sock_recv()` works for serail port object? ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32396> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
