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tio — Monitor and interact with serial ports. See also: `picocom`, `cu`, `minicom`. More information: <htt

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandmonitorandinteractcliwithserialtio

Problem

How to use the tio command: Monitor and interact with serial ports. See also: picocom, cu, minicom. More information: <https://github.com/tio/tio#3-usage>.

Solution

tio — Monitor and interact with serial ports. See also: picocom, cu, minicom. More information: <https://github.com/tio/tio#3-usage>.

Open a serial port with default settings:

tio {{/dev/ttyUSB0}}

Open a serial port with a specific baud rate:

tio {{[-b|--baudrate]}} {{9600}} {{/dev/ttyUSB0}}

Open a serial port and log output to a file:

tio {{[-L|--log]}} --log-file {{log_file}} {{/dev/ttyUSB0}}

Open a serial port and enable hexadecimal output:

tio --output-mode hex {{/dev/ttyUSB0}}

List available serial ports:

tio {{[-l|--list]}}

Exit tio session:

<Ctrl t><q>

Code Snippets

Open a serial port with default settings

tio {{/dev/ttyUSB0}}

Open a serial port with a specific baud rate

tio {{[-b|--baudrate]}} {{9600}} {{/dev/ttyUSB0}}

Open a serial port and log output to a file

tio {{[-L|--log]}} --log-file {{log_file}} {{/dev/ttyUSB0}}

Open a serial port and enable hexadecimal output

tio --output-mode hex {{/dev/ttyUSB0}}

List available serial ports

tio {{[-l|--list]}}

Context

tldr-pages: common/tio

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