+ #self.fh = open(self.file_dev_ttyusb,"w+")
+ self.fh = os.fdopen(os.open(self.file_dev_ttyusb, os.O_RDWR | os.O_NONBLOCK),"r+")
+ #pythons sucks just like perl: we need nonblock or we can't write to FileHandle while we block reading on same filehandle