Call Up another system and act as a dial-in/serial terminal or perform file transfers with no error checking. More information: https://manned.org/cu.
sudo cu {{[-l|--line]}} {{/dev/ttyXYZ}}
sudo cu {{[-l|--line]}} {{/dev/ttyXYZ}} {{[-s|--speed]}} {{115200}}
sudo cu {{[-l|--line]}} {{/dev/ttyXYZ}} {{[-s|--speed]}} {{115200}} {{[-h|--halfduplex]}}
sudo cu {{[-l|--line]}} {{/dev/ttyXYZ}} {{[-s|--speed]}} {{115200}} --parity={{even|odd|none}} {{[-f|--nortscts]}} --nostop
cu
session when in connection:<Enter><~><.>