• Screen - Full-screen window manager that multiplexes a physical terminal

Print information on available serial ports:

• dmesg | grep tty output example usb 1-6: cp210x converter now attached to ttyUSB0

Information about the device, such as its maximum baud rate:

• stty < /dev/ttyUSB0

Information about loaded modules, for example is cp210x loaded?

• lsmod

• GNU Screen

Configuration	Value
Baud rate	1500000
Data bit	8
Parity check	None
Stop bit	1
Flow control	None

The program stty can be used to determine the arguments for configuring the TTY-device.

• stty --help

Option	Explanation
baud_rate	The baud rate.
csN	Set character size to N bits where N in <5..8>.
[-]parenb	Generate parity bit in output and expect parity bit in input.
[-]cstopb	Two stop bits per character (one with '-').
[-]crtscts	Enable RTS/CTS handshaking (hardware flow control).

The program can also be used to configure the device. For example,

• stty -F /dev/ttyUSB0 cs8 -parenb -cstopb -crtscts

Alternatively, configure the device on connection:

• # screen -fnL /dev/ttyUSB0 1500000,cs8,-parenb,-cstopb,-crtscts
• -fn turns flow-control off
• -L -LogFile <filename> log output to the same directory in which screen was executed.
  • Or log in prompt with Ctrl+A, : then hardcopy -h <file>
• Ctrl+A then k to kill the process.
• Ctrl+A then i for information about connection.

In a separate terminal, confirm that the connection is configured as intended:

• stty -F /dev/ttyUSB0 -a
• The -a for human readable output, use -g for TTY form.