Manufacturer of chip documentation.

dmesg | grep ttyACM
ls /dev/ttyACM*
sudo ln -sf /dev/ttyACM0 /dev/ttyS3
sudo stty -F /dev/ttyS9 9600
sudo apt install minicom

• Bits per sec - 9600
• Data bits - 8
• Parity - none
• Stop bits - 1
• Flow control - none