FlipperFS

Reliable Flipper Zero filesystem operations via serial CLI

FlipperFS is a Python library that provides direct, reliable access to the Flipper Zero filesystem through serial communication at 230400 baud. Unlike other libraries with buggy storage operations, FlipperFS uses the proven serial CLI interface for rock-solid file operations.

Features

• 🔌 Direct Serial Communication - No middleware, talks directly to Flipper CLI at 230400 baud
• 📁 Complete Filesystem Operations - read, write, list, stat, mkdir, remove, copy, rename
• 🔢 Binary File Support - Handle both text and binary files with chunk operations
• 📡 Sub-GHz Utilities - Optional specialized operations for Sub-GHz signal files
• 🛡️ Robust Error Handling - Custom exceptions with meaningful error messages
• 🐍 Pythonic API - Context managers, type hints, clean interfaces
• ✅ Production Ready - Comprehensive test coverage and proven in production

Installation

pip install flipper-fs

Import as:

import flipperfs

Development Installation

# Clone the repository
git clone https://github.com/AndreMiras/flipper-fs.py
cd flipper-fs.py

# Install in development mode with dev dependencies
pip install -e ".[dev]"

For reproducible CI/CD builds:

pip install -r requirements-dev.txt

Quick Start

Basic Usage

from flipperfs import FlipperStorage

# Connect to Flipper Zero
with FlipperStorage(port='/dev/ttyACM0') as storage:
    # List files
    files = storage.list('/any/subghz')
    print(f"Found {len(files)} items")

    # Read a file
    content = storage.read('/any/subghz/signal.sub')
    print(content)

    # Write a file
    storage.write('/any/test.txt', 'Hello from FlipperFS!')

    # Check if path exists
    if storage.exists('/any/subghz'):
        print("Sub-GHz directory exists")

    # Get file info
    info = storage.stat('/any/test.txt')
    print(f"File size: {info['size']} bytes")

    # Clean up
    storage.remove('/any/test.txt')

Sub-GHz Operations

from flipperfs.extras import SubGhzStorage

with SubGhzStorage(port='/dev/ttyACM0') as subghz:
    # List all signal files
    signals = subghz.list_signals()
    print(f"Found {len(signals)} signal files")

    # Read and parse signal file
    signal_data = subghz.read_signal('my_signal.sub')
    print(f"Frequency: {signal_data['Frequency']}")
    print(f"Protocol: {signal_data['Protocol']}")

    # Create a new signal file
    subghz.write_signal(
        signal_name='test_signal',
        hex_key='00000012F6CC053C',
        frequency=433920000,
        protocol='Dooya',
        bit_length=40
    )

    # Create temporary signal for transmission
    temp_path = subghz.create_temp_signal(
        hex_key='00000012F6CC053C',
        protocol='Dooya'
    )
    print(f"Temp signal created at: {temp_path}")

    # Clean up
    subghz.remove(temp_path)

Network Connections

flipper-fs supports connecting to Flipper Zero over network via socat or ser2net, enabling usage in containerized environments (Docker/Podman) and remote access scenarios.

Using socat (recommended for Docker)

On the host machine with Flipper Zero connected:

# Bridge /dev/ttyACM0 to TCP port 3333
socat TCP-LISTEN:3333,reuseaddr,fork FILE:/dev/ttyACM0,b230400,raw,echo=0

In your application (can be in Docker container):

from flipperfs import FlipperStorage

# Connect via network (tcp:// and socket:// are equivalent)
storage = FlipperStorage(port='tcp://172.17.0.1:3333')
# or
storage = FlipperStorage(port='socket://172.17.0.1:3333')

# Works the same as serial connection
files = storage.list('/ext/subghz')

Supported URL formats

• tcp://host:port - Raw TCP socket (alias for socket://)
• socket://host:port - Raw TCP socket
• rfc2217://host:port - RFC2217 (Telnet-based)
• /dev/ttyACM0 - Direct serial port (traditional)

See pyserial URL handlers for more options.

API Reference

FlipperStorage

Main class for filesystem operations.

Connection

storage = FlipperStorage(port='/dev/ttyACM0', baud_rate=230400)

Parameters:

• port (str): Serial port path (default: /dev/ttyACM0)
• baud_rate (int): Serial baud rate (default: 230400)

Methods

info(path='/any') -> Dict[str, str] Get filesystem information (size, free space, etc.)

list(path='/any') -> List[Dict[str, Union[str, int]]] List files and directories. Returns list of dicts with keys: type, name, size, path

read(file_path) -> str Read text file content

write(file_path, content) -> bool Write text content to file

read_binary(file_path, chunk_size=1024) -> bytes Read binary file using chunk operations

write_binary(file_path, data, chunk_size=1024) -> bool Write binary data to file using chunk operations

stat(path) -> Optional[Dict[str, Union[str, int]]] Get file or directory statistics

exists(path) -> bool Check if file or directory exists

remove(path) -> bool Delete file or directory

mkdir(path) -> bool Create directory

copy(source, destination) -> bool Copy file to new location

rename(old_path, new_path) -> bool Rename or move file

md5(file_path) -> str Calculate MD5 hash of file

tree(path='/any') -> str Get recursive directory listing as formatted string

close() Close serial connection

SubGhzStorage

Extended storage operations for Sub-GHz signal files (inherits from FlipperStorage).

Methods

list_signals(directory='/any/subghz') -> List[str] List all .sub signal files in directory

read_signal(signal_name) -> Dict[str, str] Read and parse .sub file content into dictionary

write_signal(signal_name, hex_key, frequency=433920000, protocol='Dooya', preset='FuriHalSubGhzPresetOok650Async', bit_length=40) -> bool Create a new .sub signal file with specified parameters

create_temp_signal(hex_key, **kwargs) -> str Create temporary signal file and return path

Exceptions

All exceptions inherit from FlipperFilesystemError:

• ConnectionError - Failed to connect or communicate with Flipper
• FileNotFoundError - File or directory not found on Flipper
• WriteError - Failed to write file to Flipper
• ReadError - Failed to read file from Flipper

Environment Variables

You can set default values via environment variables:

export FLIPPER_PORT=/dev/ttyACM1
export FLIPPER_BAUD=230400

Then in your code:

import os
from flipperfs import FlipperStorage

port = os.getenv('FLIPPER_PORT', '/dev/ttyACM0')
storage = FlipperStorage(port=port)

Serial Port Detection

On Linux, Flipper Zero typically appears as /dev/ttyACM0 or /dev/ttyACM1.

To find your Flipper's port:

# List serial ports
ls /dev/tty* | grep ACM

# Or use dmesg
dmesg | grep tty

On macOS:

ls /dev/cu.usbmodem*

On Windows:

# Check Device Manager for COM ports

Development

Running Tests

Unit Tests (Default)

# Install dev dependencies
pip install -e ".[dev]"

# Run all tests (integration tests skip without hardware)
pytest

# Run with coverage
pytest --cov=flipperfs --cov-report=html

# Run only unit tests (exclude integration tests)
pytest tests/flipperfs/

All unit tests use mocked serial connections and run without hardware.

Integration Tests (Optional - Requires Hardware)

Integration tests verify real communication with Flipper Zero devices. They run automatically if hardware is available, or skip gracefully if not.

Requirements:

• Flipper Zero device connected via USB serial or network
• Serial port permissions (Linux: user in dialout group)
• Network bridge configured (optional, for Docker/remote scenarios)

Running with USB Serial:

# Find your Flipper's serial port
ls /dev/ttyACM*  # Linux
ls /dev/cu.usbmodem*  # macOS

# Enable integration tests
export FLIPPER_PORT=/dev/ttyACM0

# Run all tests (includes integration tests)
pytest

# Run only integration tests
pytest tests/test_integration.py -v

Running with Network Connection:

For Docker/containerized environments, use socat to bridge serial to network:

# On host with Flipper connected
socat TCP-LISTEN:3333,reuseaddr,fork FILE:/dev/ttyACM0,b230400,raw,echo=0

# In container or another machine
export FLIPPER_PORT=tcp://172.17.0.1:3333
pytest tests/test_integration.py -v

Without Hardware:

Integration tests skip automatically when FLIPPER_PORT is not set:

# Integration tests will show as "SKIPPED"
pytest tests/test_integration.py -v

What Integration Tests Verify:

• Real serial communication at 230400 baud
• File write/read operations with actual device I/O
• Filesystem metadata retrieval (stat, exists)
• File cleanup and error handling
• Network connection compatibility (tcp:// URLs)

Code Formatting and Linting

# Format code
ruff format flipperfs tests examples

# Check formatting
ruff format --check flipperfs tests examples

# Lint code
ruff check flipperfs tests examples

# Auto-fix linting issues
ruff check --fix flipperfs tests examples

# Type checking
mypy flipperfs

Examples

See the examples/ directory for complete examples:

• basic_operations.py - Basic filesystem operations
• binary_files.py - Binary file handling
• subghz_signals.py - Sub-GHz signal management

Why FlipperFS?

Existing libraries like PyFlipper have known bugs in their storage operations, particularly with file writes. FlipperFS was built from the ground up using direct serial CLI communication, which has proven reliable in production.

Advantages

• ✅ Proven reliability - Battle-tested in production environments
• ✅ Direct serial - No wrapper layers to cause issues
• ✅ Complete API - All filesystem operations supported
• ✅ Well tested - Comprehensive test suite
• ✅ Clean code - Well-structured, documented, maintainable

Troubleshooting

Permission Denied on Linux

Add your user to the dialout group:

sudo usermod -a -G dialout $USER
# Log out and back in for changes to take effect

Or run with sudo (not recommended):

sudo python your_script.py

Connection Timeout

• Ensure Flipper is powered on
• Check the serial port is correct (ls /dev/tty*)
• Verify no other programs are using the serial port
• Try unplugging and replugging the USB cable

Import Errors

Make sure pyserial is installed:

pip install pyserial

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Make your changes with tests
4. Run the test suite
5. Submit a pull request

License

MIT License - see LICENSE file for details

Credits

Developed to provide reliable filesystem operations for Flipper Zero devices.

Links

• Repository: https://github.com/AndreMiras/flipper-fs.py
• Issues: https://github.com/AndreMiras/flipper-fs.py/issues
• PyPI: https://pypi.org/project/flipper-fs/
• Flipper Zero: https://flipperzero.one/