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Cross platform serial debug assistant with GUI

Project description


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A cross platform serial debug tools written by python

Windows Linux Raspberry Pi macOS
comtool Windows screenshot comtool linux screenshot comtool Raspberry Pi screenshot
White theme Dark theme protocol plugin TCP/UDP Terminal Graph
comtool white theme comtool dark theme comtool protocol plugin tcp udp plugin terminal plugin graph

screenshot maybe the old version, the latest may not the same totally! But better performance、more easy to use and more elegant


  • cross platform (Windows, Linux, macOS, Raspberry Pi)(code with python, only if your platform support python)
  • reliable stability, no UI freeze
  • multiple language support
  • configs save and auto load(auto save settings when exit)
  • multiple character encode support(ASII,GBK(Chinese),UTF-8,UTF-16 etc.)
  • night theme and White theme(can create more theme if you want)
  • multiple connection type support, and support add connection plugin
    • serial port
      • serial auto detect, and remember last selected support
      • serial offline auto reconnect support
      • port baudrate(any value) bytesize parity stopbits flow control etc. settings
      • rts & dtr control by hand
    • TCP/UDP support, include client and server mode
    • SSH client support
  • plugin support(Create plugin see docs/, built-in plugin:
    • dbg plugin, support basic send receive debug operation
      • basic send/receive data (ascii and hex)
      • send and receive data count
      • clear received data area
      • auto linefeed
      • scheduled auto send
      • send history and select send again
      • custom most usage data items and one click to send
      • CR LF(\r\n) or LF(\n) support
      • key shortcuts like Ctrl+Enter to send etc. More see help
      • receive and send record support add timestamp and save log to file
      • send file
      • unix terminal style color support(e.g.\x1b[33;42mhello\x1b[0mhello2)
      • escape character support, like \r \n \t \x etc.
    • protocol plugin, customize your own protocol
      • customize encoding and decoding method
      • customize shortcut key
      • escape character support, like \r \n \t \x etc.
    • terminal plugin, basic terminal interaction
    • graph plugin
      • support dynamicly add graph widgets, add graph widgets you need
      • display line chart in realtime, support customize protocol header(support escape characters)
      • customable button to send data, support shortcut key


There are two ways to install COMTool:

Install binary


And you can install by scoop, maintained by StudentWeis

scoop bucket add Nightly
scoop install comtool


Linux has too much version, so we only compile binary for ubuntu. Other distribution please install from pypi or source code. If you have any idea to pack cross platform binary like flatpak or appimage, you can contribute a pull request or add an issue to tell me how to

Arch Linux and its derivative distributions can install from AUR(maintained by taotieren):

# Release version
yay -S python-comtool
# Development version
yay -S python-comtool-git
  • Download release at release page, and extract files from .zip file, and click comtool to run

  • Add current user to dialout group to avoid sudo command

sudo usermod -a -G dialout $USER
grep 'dialout' /etc/group
reboot #must reboot to take effect

Rasberry Pi

just open terminal, type the command below:

sudo apt install git
git clone --depth=1
cd COMTool
pip3 install .
# or
# python bdist_wheel
# sudo pip3 install dist/COMTool-*.*.*-py3-none-any.whl
  • Add current user to dialout group to avoid sudo command
sudo usermod -a -G dialout $USER
grep 'dialout' /etc/group
reboot #must reboot to take effect

then enjoy by command



If you want to open multiple comtool, just right click dock icon, then click New Window.

or you can open terminal and type

open -n /Application/


cd /Applicatioin/

Because the program is not signed by the developer, it will warn when you open it for the first time. You need to go to Settings -> Security and Privacy -> General to see the prompt comtool and click Open anyway.

Windows defender shows comtool binary is malware?

If your program is download from here, it's ok, the error caused by pack issue, all the source code and pack script is here, even the pack progress is totally automated with github action, no one manually pack.

If you remain have concern, just download source code to run with python or pack yourself.

Of course, if you find a better pack way, please open issue to tell us.

Install python package

For developers or the binary not support your platform's, use this way to install

  • Install Python3 first

    • If windows or macOS: dowload python3
    • If linux: ubuntu for example sudo apt install python3 python3-pip, macOS brew install python3 python3-pip
  • Ensure you have pip

pip3 --version
# or
pip --version

If no this command, install by

python3 -m ensurepip
  • Then install from pypi:
pip3 install comtool

for Chinese, you can use tuna mirrors to download faster by:

pip install -i comtool
  • Or you can directly install from github
pip3 install git+
  • Or you can download source code, then install from source code
    • download source code, download in web page or git clone
    • install
cd COMTool
pip install .

or build your own wheel binary

pip3 install wheel
python bdist_wheel
pip install dist/COMTool-*.*.*-py3-none-any.whl
  • By the way, you should add current user to dialout group to avoid sudo command
sudo usermod -a -G dialout $USER
grep 'dialout' /etc/group
reboot #must reboot to take effect

Manually add app to start menu on Linux

  • Copy tool/comtool.desktop to /usr/share/applications folder(may need root user to do this)
  • Edit /usr/share/applications/comtool.desktop, change icon path Icon=/usr/local/COMTool/assets/logo.ico to actual icon path, you can also use your love icon
  • Then you can find comtool app in start menu(or app center)

Pack binary

pip3 install pyinstaller
cd dist

It's better to create a virtual environment before pack to decrease the size of binary


  1. Install python(>=3.8) and pip3


sudo apt install python3 python3-pip

Windows: dowload python3

  1. install packages like pyserial and PyQt5 etc.(list in requirements.txt)
cd COMTool
pip3 install -r requirements.txt

On Raspberry, python3-pyqt5 can be install by apt command:

sudo pip3 install --upgrade pyserial
sudo apt install python3-pyqt5
  1. clone project
git clone
  1. code, resolve bugs or add new reatures

Recommended PyCharm IDE or vscode to get start

How to run: Generate translate binary files first(.mo)

python COMTool/ finish

Then execute main program

python COMTool/
  1. pull request

Write your own plugins in minutes

see docs/

Add translate

  • Install environment first(python pip packages in the requirments.txt)
apt install python3 python3-pip
pip3 install -r requirements.txt
  • If you need to add a new lanuage, or skip

Add locale in

locales=["en", "zh_CN", "zh_TW", "ja"]

append your language to this list, locales can be found here or wikipedia, zh_CN for example means China Mainland, corresponding language is simplified Chinese characters, zh_TW means China Taiwan, and language is traditional Chinese characters, you can also only use zh to use simplified Chinese characters.

  • Generate translate files
python prepare

This command will generate .po files in locales folder

  • Translate mannually

Then translate .po files, this is a standard translate file format which named gettext

  • Generate binary translate files

to make program read faster, the text files .po should be convert to binary file .mo, just run command:

python finish

and then you can see locales/<locale>/LC_MESSAGES/ file

  • Test

Run application, you will see the new translation

  • Pull request

Create a PR to merge your changes to this repo

Issue and improvement

Create issue here


LGPL-3.0 License

And used these open source projects as libraries:

Project details

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COMTool-3.3.1.tar.gz (824.0 kB view hashes)

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