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250 lines
6.6 KiB
250 lines
6.6 KiB
MicroPython remote control: mpremote
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====================================
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The ``mpremote`` command line tool provides an integrated set of utilities to
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remotely interact with and automate a MicroPython device over a serial
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connection.
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To use mpremote install it via ``pip``:
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.. code-block:: bash
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$ pip install mpremote
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The simplest way to use this tool is just by invoking it without any arguments:
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.. code-block:: bash
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mpremote
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This command automatically detects and connects to the first available serial
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device and provides an interactive REPL. Serial ports are opened in exclusive
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mode, so running a second (or third, etc) instance of ``mpremote`` will connect
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to subsequent serial devices, if any are available.
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Commands
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--------
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For REPL access, running ``mpremote`` without any arguments is usually all that
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is needed. ``mpremote`` also supports a set of commands given at the command
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line which will perform various actions on remote MicroPython devices.
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The full list of supported commands are:
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- connect to a specified device via a device-name shortcut:
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.. code-block:: bash
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$ mpremote <device-shortcut>
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- connect to specified device via name:
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.. code-block:: bash
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$ mpremote connect <device>
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``<device>`` may be one of:
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- ``list``: list available devices
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- ``auto``: connect to the first available device
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- ``id:<serial>``: connect to the device with USB serial number
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``<serial>`` (the second entry in the output from the ``connect list``
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command)
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- ``port:<path>``: connect to the device with the given path
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- any valid device name/path, to connect to that device
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- disconnect current device:
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.. code-block:: bash
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$ mpremote disconnect
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After a disconnect, auto soft-reset is enabled.
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- resume a previous ``mpremote`` session:
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.. code-block:: bash
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$ mpremote resume
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This disables auto soft-reset.
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- perform a soft-reset of the device:
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.. code-block:: bash
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$ mpremote soft-reset
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This will clear out the Python heap and restart the interpreter. It also
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disables auto soft-reset.
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- enter the REPL on the connected device:
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.. code-block:: bash
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$ mpremote repl [options]
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Options are:
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- ``--capture <file>``, to capture output of the REPL session to the given
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file
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- ``--inject-code <string>``, to specify characters to inject at the REPL when
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Ctrl-J is pressed
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- ``--inject-file <file>``, to specify a file to inject at the REPL when
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Ctrl-K is pressed
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- evaluate and print the result of a Python expression:
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.. code-block:: bash
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$ mpremote eval <string>
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- execute the given Python code:
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.. code-block:: bash
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$ mpremote exec <string>
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- run a script from the local filesystem:
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.. code-block:: bash
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$ mpremote run <file>
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- execute filesystem commands on the device:
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.. code-block:: bash
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$ mpremote fs <command>
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``<command>`` may be:
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- ``cat <file..>`` to show the contents of a file or files on the device
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- ``ls`` to list the current directory
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- ``ls <dirs...>`` to list the given directories
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- ``cp [-r] <src...> <dest>`` to copy files; use ":" as a prefix to specify
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a file on the device
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- ``rm <src...>`` to remove files on the device
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- ``mkdir <dirs...>`` to create directories on the device
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- ``rmdir <dirs...>`` to remove directories on the device
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- mount the local directory on the remote device:
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.. code-block:: bash
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$ mpremote mount [options] <local-dir>
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During usage, Ctrl-D will soft-reboot and normally reconnect the mount automatically.
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If the unit has a main.py running at startup however the remount cannot occur.
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In this case a raw mode soft reboot can be used: Ctrl-A Ctrl-D to reboot,
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then Ctrl-B to get back to normal repl at which point the mount will be ready.
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Options are:
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- ``-l``, ``--unsafe-links``: By default an error will be raised if the device
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accesses a file or directory which is outside (up one or more directory levels) the
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local directory that is mounted. This option disables this check for symbolic
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links, allowing the device to follow symbolic links outside of the local directory.
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- unmount the local directory from the remote device:
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.. code-block:: bash
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$ mpremote umount
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Multiple commands can be specified and they will be run sequentially.
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Auto connection and soft-reset
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------------------------------
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Connection and disconnection will be done automatically at the start and end of
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the execution of the tool, if such commands are not explicitly given. Automatic
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connection will search for the first available serial device. If no action is
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specified then the REPL will be entered.
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Once connected to a device, ``mpremote`` will automatically soft-reset the
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device if needed. This clears the Python heap and restarts the interpreter,
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making sure that subsequent Python code executes in a fresh environment. Auto
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soft-reset is performed the first time one of the following commands are
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executed: ``mount``, ``eval``, ``exec``, ``run``, ``fs``. After doing a
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soft-reset for the first time, it will not be done again automatically, until a
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``disconnect`` command is issued.
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Auto soft-reset behaviour can be controlled by the ``resume`` command. And the
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``soft-reset`` command can be used to perform an explicit soft reset.
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Shortcuts
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---------
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Shortcuts can be defined using the macro system. Built-in shortcuts are::
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- ``devs``: list available devices (shortcut for ``connect list``)
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- ``a0``, ``a1``, ``a2``, ``a3``: connect to /dev/ttyACM?
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- ``u0``, ``u1``, ``u2``, ``u3``: connect to /dev/ttyUSB?
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- ``c0``, ``c1``, ``c2``, ``c3``: connect to COM?
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- ``cat``, ``ls``, ``cp``, ``rm``, ``mkdir``, ``rmdir``, ``df``: filesystem
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commands
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- ``reset``: reset the device
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- ``bootloader``: make the device enter its bootloader
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Any user configuration, including user-defined shortcuts, can be placed in the file
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``.config/mpremote/config.py``. For example:
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.. code-block:: python3
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commands = {
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"c33": "connect id:334D335C3138",
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"bl": "bootloader",
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"double x=4": "eval x*2", # x is an argument, with default 4
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"wl_scan": ["exec", """
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import network
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wl = network.WLAN()
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wl.active(1)
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for ap in wl.scan():
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print(ap)
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""",],
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"test": ["mount", ".", "exec", "import test"],
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}
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Examples
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--------
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.. code-block:: bash
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mpremote
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mpremote a1
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mpremote connect /dev/ttyUSB0 repl
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mpremote ls
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mpremote a1 ls
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mpremote exec "import micropython; micropython.mem_info()"
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mpremote eval 1/2 eval 3/4
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mpremote mount .
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mpremote mount . exec "import local_script"
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mpremote ls
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mpremote cat boot.py
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mpremote cp :main.py .
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mpremote cp main.py :
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mpremote cp -r dir/ :
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