Controlling Arduino Using Python PyFirmata (2026)

Controlling Arduino Using Python PyFirmata

Pyfirmata is a Python package that lets you FULLY CONTROL the Arduino and code through Python.

In this article, I will show you how to control your Arduino without coding it!

What is Pyfirmata?

Pyfirmata is a Python package that lets you communicate your Python script to your Arduino.

This gives you access to all functions of the pins without coding the Arduino. Simply put, you can connect sensors without coding the board.

Using this, it is easier to integrate Arduino-based devices to other systems.

Arduino Setup

First thing to do is to setup the Arduino and upload “Standard Firmata” example code. To do this, open the Arduino IDE, go to File>Examples>Firmata>StandardFirmata. It will open a sample sketch.

No need to edit anything from this sketch. Just connect your Arduino and upload the sketch.

PyFirmata Setup

To install the package, simply search in the Python Packages window “PyFirmata”. just click install and wait for it to complete.

Sample Python Code

Now you can try the code below. The code below will make the Arduino blink its built-in LED. You can also read the pyfirmata documentation for more functions.

from pyfirmata import Arduino
import time

if __name__ == '__main__':
    board = Arduino('COM5')
    print("Communication Successfully started")

    while True:
        board.digital[13].write(1)
        time.sleep(1)
        board.digital[13].write(0)
        time.sleep(1)

Conclusion

So there you have it! Controlling Arduino Using Python PyFirmata.

This project is intimidating at first but you will see that it is fairly easy to do. You can combine this to other Python or Arduino projects and build an awesome system!

Click the button below to download the sample code.

Download

Python PyFirmata Sample Code

Frequently Asked Questions

How does this Python project work?

Built with Python 3.10+ and either Tkinter (desktop GUI), Django (web), or Flask (lightweight web). Standard structure: main.py launches the app, modules organized by feature, SQLite/MySQL for persistence.

What Python version and libraries does this project require?

Most projects in this batch use Python 3.10, 3.11, or 3.12 (avoid 3.13 until library wheels catch up). Standard libs: tkinter (built-in), sqlite3 (built-in). External: pip install pillow opencv-python pygame mysql-connector-python reportlab requests beautifulsoup4. Check the requirements.txt file (if included) for exact versions.

How do I set up the database for this Python project?

For SQLite (most common, no setup needed): the .db file auto-creates on first run. For MySQL: install MySQL Server + MySQL Workbench, create an empty database, import the included .sql file, edit the connection string in db.py (or db_connect.py) with your host, user, password, database name.

Can I use this Python project for a BSIT capstone or thesis?

Yes. Python is rising fast in Philippine BSIT panels. Extend it: add user roles via auth module, dashboards (matplotlib charts), PDF reports (reportlab), email notifications (smtplib), real domain extension (analytics, audit log, multi-branch support). Pair with Chapter 1-5 documentation matching your panel’s rubric.

Why am I getting ‘ModuleNotFoundError’ or ‘No module named X’?

Three common Python issues: (1) Module not installed: pip install (use pip3 on macOS/Linux). (2) Wrong virtualenv: activate the project’s venv before running (python -m venv venv then venv\Scripts\activate on Windows or source venv/bin/activate on Linux/macOS). (3) Python 2 vs Python 3 mismatch: ensure you run python3 main.py not python main.py if both are installed.

Where can I find more Python projects with source code?

Browse the Python Projects hub for the full library. For computer vision specifically see OpenCV Projects (46 vision systems). For ML / AI capstones see Machine Learning Projects. For BSIT capstone idea lists see 150 Best Capstone Project Ideas.

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Controlling Arduino Using Python PyFirmata