ft4222
Python wrapper around libFT4222.
Decision gist · record as of 2026-08-14
Yes, if you have an FT4222H device and need Python control over I2C, SPI, or GPIO on that chip. The package is stable (Production/Stable status), has no runtime dependencies, and covers the main use cases. However, maintenance is aging (182 days since last release), so verify that the incomplete API coverage includes the LibFT4222 functions you need before committing to it.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- FT4222H hardware device must be connected; on Linux, udev rules may be required for user-level access (see documentation).
- Medium install friction due to compiled wheels; requires Python 3.9 or later.
- No runtime dependencies.
License · maintenance · safety
MIT AND LicenseRef-FTDI (permissive) — Dual-licensed under MIT and LicenseRef-FTDI (permissive). The FTDI license component may carry additional restrictions specific to FTDI hardware; review the full license text before commercial use.
last release 2026-02-13 (182 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 104,934 downloads/mo, #12,730 on PyPI
Alternatives
Verify before relying
import ft4222
# List devices
nbDev = ft4222.createDeviceInfoList()
for i in range(nbDev):
print(ft4222.getDeviceInfoDetail(i, False))
# Open device and initialize I2C master
dev = ft4222.openByDescription('FT4222 A')
dev.i2cMaster_Init(100)- Whether LibFT4222 system library must be pre-installed on the target system
- Compatibility with Python 3.14 (listed in classifiers but not in requires_python constraint)
- Whether udev rules on Linux are required for non-root access or only recommended
What it is and what it does
ft4222 is a Python wrapper around FTDI's LibFT4222 library, providing direct control over FT4222H USB-to-peripheral interface chips. The library exposes I2C master, SPI master, and GPIO functionality through a Python API that mirrors LibFT4222's C interface. It has no runtime dependencies beyond the system's LibFT4222 installation and supports modern Python versions (3.9 through 3.14).
The package is used to communicate with I2C and SPI peripherals connected through an FT4222H device, or to control GPIO pins on the chip itself. Typical workflows involve enumerating connected devices, opening a specific device by description, initializing the desired interface (I2C, SPI, or GPIO), and then performing read/write operations. The binding is incomplete relative to the full LibFT4222 API but covers the core use cases shown in the documentation examples.
Use it for
- Control I2C peripherals (sensors, EEPROMs) connected via FT4222H from a USB host without native I2C support.
- Communicate with SPI devices (flash memory, displays) over USB using the FT4222H as a bridge.
- Toggle GPIO pins on the FT4222H for signaling, timing control, or device enable/disable logic.
- Prototype embedded systems on a development machine by bridging USB to I2C/SPI without dedicated hardware interfaces.
- Automate hardware testing or configuration workflows that require USB-based I2C/SPI access.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you have an FT4222H device and need Python control over I2C, SPI, or GPIO on that chip.
The package is stable (Production/Stable status), has no runtime dependencies, and covers the main use cases. However, maintenance is aging (182 days since last release), so verify that the incomplete API coverage includes the LibFT4222 functions you need before committing to it.
Install
ft4222 on PyPI
Before you install
Medium install friction due to compiled wheels; requires Python 3.9 or later. No runtime dependencies. Last release was 182 days ago; maintenance status is aging but the package has been stable since its 2020 initial release.
FT4222H hardware device must be connected; on Linux, udev rules may be required for user-level access (see documentation).
License in practice
Dual-licensed under MIT and LicenseRef-FTDI (permissive). The FTDI license component may carry additional restrictions specific to FTDI hardware; review the full license text before commercial use.
Quickstart
import ft4222
# List devices
nbDev = ft4222.createDeviceInfoList()
for i in range(nbDev):
print(ft4222.getDeviceInfoDetail(i, False))
# Open device and initialize I2C master
dev = ft4222.openByDescription('FT4222 A')
dev.i2cMaster_Init(100)Verify before relying
- Whether LibFT4222 system library must be pre-installed on the target system
- Compatibility with Python 3.14 (listed in classifiers but not in requires_python constraint)
- Whether udev rules on Linux are required for non-root access or only recommended
Package facts
| License | MIT AND LicenseRef-FTDI permissive |
| Python support | Supports the current Python release >=3.9.0 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Aging 182 days since the last release |
| First released | |
| Downloads | 104,934 / month, #12,730 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableOperating System :: MacOS :: MacOS XOperating System :: MicrosoftOperating System :: POSIX :: LinuxProgramming Language :: CythonProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.9Topic :: CommunicationsTyping :: Typed |
Evidence: ft4222-1.13.0-cp310-cp310-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; ft4222-1.13.0-cp310-cp310-manylinux2014_armv7l.manylinux_2_17_armv7l.manylinux_2_31_armv7l.whl; ft4222-1.13.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; ft4222-1.13.0-cp310-cp310-manylinux_2_28_i686.whl; ft4222-1.13.0-cp310-cp310-win32.whl; ft4222-1.13.0-cp310-cp310-win_amd64.whl; ft4222-1.13.0-cp311-cp311-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; ft4222-1.13.0-cp311-cp311-manylinux2014_armv7l.manylinux_2_17_armv7l.manylinux_2_31_armv7l.whl; ft4222-1.13.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; ft4222-1.13.0-cp311-cp311-manylinux_2_28_i686.whl; ft4222-1.13.0-cp311-cp311-win32.whl; ft4222-1.13.0-cp311-cp311-win_amd64.whl; ft4222-1.13.0-cp312-cp312-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; ft4222-1.13.0-cp312-cp312-manylinux2014_armv7l.manylinux_2_17_armv7l.manylinux_2_31_armv7l.whl; ft4222-1.13.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; ft4222-1.13.0-cp312-cp312-manylinux_2_28_i686.whl; ft4222-1.13.0-cp312-cp312-win32.whl; ft4222-1.13.0-cp312-cp312-win_amd64.whl; ft4222-1.13.0-cp313-cp313-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; ft4222-1.13.0-cp313-cp313-manylinux2014_armv7l.manylinux_2_17_armv7l.manylinux_2_31_armv7l.whl
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