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02729c10b1
Make it possible to remap the prefix key (default: ctrl-t) by setting the prefix-ctrl-key variable in the configuration file. Allowed values are in the range a..z. Example, to set the prefix key to ctrl-a simply do: prefix-ctrl-key = a
270 lines
8 KiB
Markdown
270 lines
8 KiB
Markdown
# tio - a simple serial device I/O tool
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[](https://circleci.com/gh/tio/tio/tree/master)
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[](https://snapcraft.io/tio)
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[](https://repology.org/project/tio/versions)
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## 1. Introduction
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tio is a simple serial device tool which features a straightforward
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command-line and configuration file interface to easily connect to serial TTY
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devices for basic I/O operations.
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<p align="center">
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<img src="images/tio-demo.gif">
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</p>
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### 1.1 Motivation
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To make a simpler serial device tool for talking with serial TTY devices with
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less focus on classic terminal/modem features and more focus on the needs of
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embedded developers and hackers.
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tio was originally created to replace
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[screen](https://www.gnu.org/software/screen) for connecting to serial devices
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when used in combination with [tmux](https://tmux.github.io).
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## 2. Features
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* Easily connect to serial TTY devices
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* Automatic connect
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* Support for arbitrary baud rates
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* List available serial devices by ID
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* Show RX/TX statistics
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* Toggle serial lines
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* Pulse the DTR line
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* Local echo support
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* Map characters (nl, cr-nl, bs, lowercase to uppercase, etc.)
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* Line timestamps
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* Support for delayed output per character
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* Support for delayed output per line
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* Hexadecimal mode
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* Log to file
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* Autogeneration of log filename
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* Configuration file support
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* Activate sub-configurations by name or pattern
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* Redirect I/O to file or network socket for scripting or TTY sharing
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* Pipe input and/or output
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* Bash completion
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* Color support
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* Man page documentation
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## 3. Usage
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For more usage details please see the man page documentation
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[here](man/tio.1.txt).
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### 3.1 Command-line
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The command-line interface is straightforward as reflected in the output from
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'tio --help':
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```
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Usage: tio [<options>] <tty-device|sub-config>
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Connect to tty device directly or via sub-configuration.
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Options:
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-b, --baudrate <bps> Baud rate (default: 115200)
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-d, --databits 5|6|7|8 Data bits (default: 8)
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-f, --flow hard|soft|none Flow control (default: none)
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-s, --stopbits 1|2 Stop bits (default: 1)
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-p, --parity odd|even|none|mark|space Parity (default: none)
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-o, --output-delay <ms> Output character delay (default: 0)
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-O, --output-line-delay <ms> Output line delay (default: 0)
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--dtr-pulse-duration <ms> DTR pulse duration (default: 100)
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-n, --no-autoconnect Disable automatic connect
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-e, --local-echo Enable local echo
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-t, --timestamp Enable line timestamp
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--timestamp-format <format> Set timestamp format (default: 24hour)
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-L, --list-devices List available serial devices
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-l, --log Enable log to file
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--log-file <filename> Set log filename
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--log-strip Strip control characters and escape sequences
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-m, --map <flags> Map characters
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-c, --color 0..255|none|list Colorize tio text (default: 15)
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-S, --socket <socket> Redirect I/O to file or network socket
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-x, --hexadecimal Enable hexadecimal mode
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-v, --version Display version
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-h, --help Display help
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Options and sub-configurations may be set via configuration file.
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See the man page for more details.
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```
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By default tio automatically connects to the provided TTY device if present.
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If the device is not present, it will wait for it to appear and then connect.
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If the connection is lost (eg. device is unplugged), it will wait for the
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device to reappear and then reconnect. However, if the `--no-autoconnect`
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option is provided, tio will exit if the device is not present or an
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established connection is lost.
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tio features full bash autocompletion.
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Typical use is without options:
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```
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$ tio /dev/ttyUSB0
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```
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Which corresponds to the commonly used default options:
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```
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$ tio -b 115200 -d 8 -f none -s 1 -p none /dev/ttyUSB0
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```
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It is recommended to connect serial tty devices by ID:
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```
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$ tio /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
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```
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Using serial devices by ID ensures that tio automatically reconnects to the
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correct serial device if it is disconnected and then reconnected.
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### 3.2 Key commands
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Various in session key commands are supported. When tio is started, press
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ctrl-t ? to list the available key commands.
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```
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[20:19:12.040] Key commands:
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[20:19:12.040] ctrl-t ? List available key commands
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[20:19:12.040] ctrl-t b Send break
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[20:19:12.040] ctrl-t c Show configuration
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[20:19:12.040] ctrl-t d Toggle DTR line
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[20:19:12.040] ctrl-t D Pulse DTR line
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[20:19:12.040] ctrl-t e Toggle local echo mode
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[20:19:12.040] ctrl-t h Toggle hexadecimal mode
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[20:19:12.040] ctrl-t l Clear screen
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[20:19:12.040] ctrl-t L Show line states
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[20:19:12.040] ctrl-t q Quit
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[20:19:12.040] ctrl-t r Toggle RTS line
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[20:19:12.041] ctrl-t s Show statistics
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[20:19:12.041] ctrl-t t Send ctrl-t key code
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[20:19:12.041] ctrl-t T Toggle line timestamp mode
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[20:19:12.041] ctrl-t U Toggle conversion to uppercase
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[20:19:12.041] ctrl-t v Show version
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```
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### 3.3 Configuration file
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Options can be set via the configuration file first found in any of the
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following locations in the order listed:
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- $XDG_CONFIG_HOME/tio/tiorc
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- $HOME/.config/tio/tiorc
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- $HOME/.tiorc
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The configuration file supports sub-configurations using named sections which can
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be activated via the command-line by name or pattern. A sub-configuration
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specifies which tty to connect to and other options.
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Example configuration file:
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```
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# Defaults
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baudrate = 9600
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databits = 8
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parity = none
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stopbits = 1
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color = 10
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dtr-pulse-duration = 50
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[rpi3]
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tty = /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
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baudrate = 115200
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no-autoconnect = enable
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log = enable
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log-file = rpi3.log
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color = 12
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[usb devices]
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pattern = usb([0-9]*)
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tty = /dev/ttyUSB%s
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color = 13
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```
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To use a specific sub-configuration by name simply start tio like so:
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```
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$ tio rpi3
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```
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Or by pattern match:
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```
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$ tio usb12
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```
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## 4. Installation
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### 4.1 Installation using package manager
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Packages for various GNU/Linux distributions are available. Please consult your
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package manager tool to find and install tio.
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If you would like to see tio included in your favorite distribution, please
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reach out to their package maintainers team.
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### 4.2 Installation using snap (Linux)
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Install latest stable version:
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```
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$ snap install tio
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```
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### 4.3 Installation using brew (MacOS, Linux)
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If you have [brew](http://brew.sh) installed, you can install tio like so:
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```
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$ brew install tio
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```
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### 4.4 Installation from source
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The latest source releases can be found [here](https://github.com/tio/tio/releases).
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Install steps:
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```
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$ meson build
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$ meson compile -C build
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$ meson install -C build
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```
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See meson\_options.txt for tio specific build options.
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Note: It is recommended to only try to install from source if you are familiar
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with how to build stuff using meson.
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## 5. Contributing
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tio is open source. If you want to help out with the project please feel free
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to join in.
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All contributions (bug reports, code, doc, ideas, etc.) are welcome.
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Please use the github issue tracker and pull request features.
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Also, if you find this free open source software useful please feel free to
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consider making a donation of your choice:
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[](https://www.paypal.me/lundmar)
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## 6. Support
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Submit bug reports via GitHub: https://github.com/tio/tio/issues
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## 7. Website
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Visit [tio.github.io](https://tio.github.io)
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## 8. License
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tio is GPLv2+. See LICENSE file for more details.
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## 9. Authors
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Created by Martin Lund \<martin.lund@keep-it-simple.com>
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See the AUTHORS file for full list of contributors.
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