Hello yes this is almost exactly what I'm looking for, I followed the instructions on that thread with the only changes being to the baud rate (set it to 115200) and after I enter "cat /dev/ttyS0" I seen jumbled characters, with small pieces of correct data. It appears to me to be a baud rate issue. Is there a way to verify that the connection speed was set to 115200?
You can check the port settings using this following command:
stty -F /dev/ttyS0 -a