Some USB-RS232 converters can't handle RTS handshaking.
The rocrail.ini must be edited by hand to turn this off:
<digint iid="roco-1" lib="roco" rtsdisabled="true" ..../>
This is a listing of working USB-RS232 devices which supports most common aspects of the RS232 hardware including handshaking.
|Digitus||y||y||y|| Reichelt |
| Future Technology Devices International, Ltd |
FT232 USB-Serial (UART) IC
|RTS/CTS|| positive messages |
are found in the forum
Availability and price are in March 2020 still valid.