I am using a Green Heron RT-20 via the serial port and the Hygain DCU1, Green Heron driver.
COM5
Default baud rate
2 stop bits
Poll is checked
Nothing has changed on my side, but I only recently started using the on-screen rotor control.
I am using an old Prolific cable, but I know it is a genuine one because I bought it from Elecraft before they changed to FTDI.
Still using WIN7, 64 bit.
73, Allen N5XZ