pio device monitor¶

Usage¶

pio device monitor [OPTIONS]

Description¶

This is a console application that provides a small terminal application. It is based on 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 remote serial ports and raw sockets using URL Handlers 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¶

-p, --port¶

The possible values are the same as documented for monitor_port option.

-b, --baud¶

Set baud rate, default 9600.

Can be customized in “platformio.ini” (Project Configuration File) using monitor_speed option.

--parity¶

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

Can be customized in “platformio.ini” (Project Configuration File) using monitor_parity option.

--rtscts¶

Enable RTS/CTS flow control.

--xonxoff¶

Enable software flow control.

--rts¶

Set initial RTS line state (0 or 1).

Can be customized in “platformio.ini” (Project Configuration File) using monitor_rts option.

--dtr¶

Set initial DTR line state (0 or 1).

Can be customized in “platformio.ini” (Project Configuration File) using monitor_dtr option.

--echo¶

Enable local echo.

Can be customized in “platformio.ini” (Project Configuration File) using monitor_echo option.

--encoding¶

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

-f, --filter¶

Add text transformation. See available filters at Filters.

--eol¶

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

Can be customized in “platformio.ini” (Project Configuration File) using monitor_eol option.

--raw¶

Do not apply any encodings/transformations.

Can be customized in “platformio.ini” (Project Configuration File) using monitor_raw 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 pio device monitor --exit-char 29.

--menu-char¶

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

---quiet¶

Diagnostics: suppress non-error messages, default Off.

--no-reconnect¶

Disable automatic reconnection if the established connection fails.

-d, --project-dir¶

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

-e, --environment¶

Process specified environments.

You can also specify which environments should be processed by default using default_envs option from “platformio.ini” (Project Configuration File).

Filters¶

PlatformIO allows you to apply multiple filters to the device monitor INPUT & OUTPUT streams using the pio device monitor --filter command or monitor_filters option.

from platformio.public import DeviceMonitorFilterBase


class Demo(DeviceMonitorFilterBase):
    NAME = "demo"

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        print("Demo filter is loaded")

    def rx(self, text):
        return f"Received: {text}\n"

    def tx(self, text):
        print(f"Sent: {text}\n")
        return text

> pio device monitor -f log2file -f default

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

Examples¶

1. Show available options for monitor

> pio device monitor --help
Usage: pio 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

> pio 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 ---