..  Copyright (c) 2014-present PlatformIO <contact@platformio.org>
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
       http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

.. _cmd_device_monitor:

platformio device monitor
=========================

.. contents::

Usage
-----

.. code-block:: bash

    platformio device monitor [OPTIONS]


Description
-----------

This is a console application that provides a small terminal
application. It is based on `Miniterm <https://pythonhosted.org/pyserial/examples.html#miniterm>`_
and itself does not implement any terminal features such
as *VT102* compatibility. However it inherits these features from the terminal
it is run. For example on GNU/Linux running from an *xterm* it will support the
escape sequences of the *xterm*. On *Windows* the typical console window is dumb
and does not support any escapes. When *ANSI.sys* is loaded it supports some
escapes.

Miniterm supports `RFC 2217 <https://tools.ietf.org/html/rfc2217.html>`__
remote serial ports and raw sockets using `URL Handlers <https://pyserial.readthedocs.io/en/latest/url_handlers.html#urls>`__
such as ``rfc2217://<host>:<port>`` respectively ``socket://<host>:<port>``
as port argument when invoking.

To control *monitor* please use these "hot keys":

* ``Ctrl+C`` Quit
* ``Ctrl+T`` Menu
* ``Ctrl+T followed by Ctrl+H`` Help

Options
-------

.. program:: platformio device monitor

.. option::
    -p, --port

Port, a number or a device name, or valid `URL Handlers <https://pyserial.readthedocs.io/en/latest/url_handlers.html#urls>`__.

Can be customized in :ref:`projectconf` using :ref:`projectconf_monitor_port`
option.

**URL Handlers**

* `rfc2217://<host>:<port>[?<option>[&<option>...]] <https://pyserial.readthedocs.io/en/latest/url_handlers.html#rfc2217>`__
* `socket://<host>:<port>[?logging={debug|info|warning|error}] <https://pyserial.readthedocs.io/en/latest/url_handlers.html#socket>`__
* `loop://[?logging={debug|info|warning|error}] <https://pyserial.readthedocs.io/en/latest/url_handlers.html#loop>`__
* `hwgrep://<regexp>[&skip_busy][&n=N] <https://pyserial.readthedocs.io/en/latest/url_handlers.html#hwgrep>`__
* `spy://port[?option[=value][&option[=value]]] <https://pyserial.readthedocs.io/en/latest/url_handlers.html#spy>`__
* `alt://port?class=<classname> <https://pyserial.readthedocs.io/en/latest/url_handlers.html#alt>`__

.. option::
    -b, --baud

Set baud rate, default ``9600``.

Can be customized in :ref:`projectconf` using :ref:`projectconf_monitor_speed`
option.

.. option::
    --parity

Set parity (*None, Even, Odd, Space, Mark*), one of
[``N``, ``E``, ``O``, ``S``, ``M``], default ``N``

.. option::
    --rtscts

Enable ``RTS/CTS`` flow control, default ``Off``

.. option::
    --xonxoff

Enable software flow control, default ``Off``

.. option::
    --rts

Set initial ``RTS`` line state (``0`` or ``1``).

Can be customized in :ref:`projectconf` using :ref:`projectconf_monitor_rts`
option.

.. option::
    --dtr

Set initial ``DTR`` line state (``0`` or ``1``).

Can be customized in :ref:`projectconf` using :ref:`projectconf_monitor_dtr`
option.

.. option::
    --echo

Enable local echo, default ``Off``

.. option::
    --encoding

Set the encoding for the serial port (e.g. ``hexlify``, ``Latin1``, ``UTF-8``),
default ``UTF-8``.

.. option::
    -f, --filter

Add text transformation. See available filters at :ref:`cmd_device_monitor_filters`.

.. option::
    --eol

End of line mode (``CR``, ``LF`` or ``CRLF``), default ``CRLF``

**NEW**: Available in Miniterm/PySerial 3.0

.. option::
    --raw

Do not apply any encodings/transformations

.. option::
    --exit-char

ASCII code of special character that is used to exit the application,
default ``3`` (DEC, ``Ctrl+C``).

For example, to use ``Ctrl+]`` run
``platformio device monitor --exit-char 29``.

.. option::
    --menu-char

ASCII code of special character that is used to control miniterm (menu),
default ``20`` (DEC)

.. option::
    ---quiet

Diagnostics: suppress non-error messages, default ``Off``

.. option::
    -d, --project-dir

Specify the path to project directory. By default, ``--project-dir`` is equal
to current working directory (``CWD``).

.. option::
    -e, --environment

Process specified environments.

You can also specify which environments should be processed by default using
:ref:`projectconf_pio_default_envs` option from :ref:`projectconf`.

.. _cmd_device_monitor_filters:

Filters
-------

.. versionadded:: 4.3

A list of filters that can be applied for monitor output using :option:`platformio device monitor --filter` or :ref:`projectconf` and :ref:`projectconf_monitor_filters` options.
option.

.. list-table::
    :header-rows:  1

    * - Name
      - Description
    * - ``default``
      - Remove typical terminal control codes from input
    * - ``colorize``
      - Apply different colors for received and echo
    * - ``debug``
      - Print what is sent and received
    * - ``direct``
      - Do-nothing: forward all data unchanged
    * - ``hexlify``
      - Show a hexadecimal representation of the data (code point of each character)
    * - ``log2file``
      - Log data to a file "platformio-device-monitor-%date%.log" located in the current working directory
    * - ``nocontrol``
      - Remove all control codes, incl. CR+LF
    * - ``printable``
      - Show decimal code for all non-ASCII characters and replace most control codes
    * - ``time``
      - Add timestamp with milliseconds for each new line
    * - ``send_on_enter``
      - Send a text to device on ENTER
    * - ``esp32_exception_decoder``
      - Custom filter for :ref:`platform_espressif32` which decodes crash exception
    * - ``esp8266_exception_decoder``
      - Custom filter for :ref:`platform_espressif8266` which decodes crash exception

Capture output to a file
------------------------

.. versionadded:: 4.3

You need to use a ``log2file`` filter from :ref:`cmd_device_monitor_filters`:

.. code-block:: bash

    $ platformio device monitor -f log2file -f default


or using :ref:`projectconf` and :ref:`projectconf_monitor_filters`

.. code-block:: ini

    [env:log_output_to_file]
    ...
    platform = ...
    monitor_filters = log2file, default


Device Monitor Filter API
-------------------------

:ref:`piocore` provides an API to extend device monitor with a custom filter declared
in "monitor" folder of :ref:`platforms`. See examples:

- https://github.com/platformio/platform-espressif32/tree/develop/monitor
- https://github.com/platformio/platform-espressif8266/tree/develop/monitor

Examples
--------

1. Show available options for *monitor*

.. code-block:: bash

    $ platformio device monitor --help
    Usage: platformio device monitor [OPTIONS]

    Options:
      -p, --port TEXT       Port, a number or a device name
      -b, --baud INTEGER    Set baud rate, default=9600
      --parity [N|E|O|S|M]  Set parity, default=N
      --rtscts              Enable RTS/CTS flow control, default=Off
      --xonxoff             Enable software flow control, default=Off
      --rts [0|1]           Set initial RTS line state, default=0
      --dtr [0|1]           Set initial DTR line state, default=0
      --echo                Enable local echo, default=Off
      --encoding TEXT       Set the encoding for the serial port (e.g. hexlify,
                            Latin1, UTF-8), default: UTF-8
      -f, --filter TEXT     Add filters / text transformation
      --eol [CR|LF|CRLF]    End of line mode, default=CRLF
      --raw                 Do not apply any encodings/transformations
      --exit-char INTEGER   ASCII code of special character that is used to exit
                            the application, default=29 (DEC)
      --menu-char INTEGER   ASCII code of special character that is used to
                            control miniterm (menu), default=20 (DEC)
      --quiet               Diagnostics: suppress non-error messages, default=Off
      -h, --help            Show this message and exit.

2. Communicate with serial device and print help inside terminal

.. code-block:: bash

    $ platformio device monitor

    --- Available ports:
    --- /dev/cu.Bluetooth-Incoming-Port n/a
    --- /dev/cu.Bluetooth-Modem n/a
    --- /dev/cu.SLAB_USBtoUART CP2102 USB to UART Bridge Controller
    --- /dev/cu.obd2ecu-SPPDev n/a
    Enter port name:/dev/cu.SLAB_USBtoUART
    --- Miniterm on /dev/cu.SLAB_USBtoUART: 9600,8,N,1 ---
    --- Quit: Ctrl+C  |  Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
    Hello PlatformIO!
    ---
    --- Ctrl+]   Exit program
    --- Ctrl+T   Menu escape key, followed by:
    --- Menu keys:
    ---    Ctrl+T  Send the menu character itself to remote
    ---    Ctrl+]  Send the exit character itself to remote
    ---    Ctrl+I  Show info
    ---    Ctrl+U  Upload file (prompt will be shown)
    --- Toggles:
    ---    Ctrl+R  RTS          Ctrl+E  local echo
    ---    Ctrl+D  DTR          Ctrl+B  BREAK
    ---    Ctrl+L  line feed    Ctrl+A  Cycle repr mode
    ---
    --- Port settings (Ctrl+T followed by the following):
    ---    p          change port
    ---    7 8        set data bits
    ---    n e o s m  change parity (None, Even, Odd, Space, Mark)
    ---    1 2 3      set stop bits (1, 2, 1.5)
    ---    b          change baud rate
    ---    x X        disable/enable software flow control
    ---    r R        disable/enable hardware flow control
    --- exit ---
