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PyFtdi documentation is available from


PyFtdi aims at providing a user-space driver for popular FTDI devices, implemented in pure Python language.

Suported FTDI devices include:

  • UART and GPIO bridges

    • FT232R (single port, 3Mbps)
    • FT230X/FT231X/FT234X/ (single port, 3Mbps)
  • UART, GPIO and multi-serial protocols (SPI, I2C, JTAG) bridges

    • FT2232C/D (dual port, clock up to 6 MHz)
    • FT232H (single port, clock up to 30 MHz)
    • FT2232H (dual port, clock up to 30 MHz)
    • FT4232H (quad port, clock up to 30 MHz)


PyFtdi currently supports the following features:

  • UART/Serial USB converter, up to 12Mbps (depending on the FTDI device capability)
  • GPIO/Bitbang support, with 8-bit asynchronous, 8-bit synchronous and 8-/16-bit MPSSE variants
  • SPI master, with simultanous GPIO support, up to 12 pins per port, with support for non-byte sized transfer
  • I2C master, with simultanous GPIO support, up to 14 pins per port
  • Basic JTAG master capabilities
  • EEPROM support (some parameters cannot yet be modified, only retrieved)
  • Experimental CBUS support on selected devices, 4 pins per port

Supported host OSes

  • macOS
  • Linux
  • FreeBSD
  • Windows, although not officially supported


SPDX-License-Identifier: BSD-3-Clause


Python support

Python 3.5 has reached end-of-life on September 5th, 2020. PyFtdi v0.52 is the last PyFtdi version to support Python 3.5. Next PyFtdi series will require Python 3.6+.

API break

Starting with version v0.40.0, several API changes are being introduced. While PyFtdi tries to maintain backward compatibility with previous versions, some of these changes may require existing clients to update calls to PyFtdi.

Do not upgrade to v0.40.0 or above without testing your client against the new PyFtdi releases. PyFtdi versions up to v0.39.9 keep a stable API with v0.22+ series.

See the Major Changes section on the online documentation for details about potential API breaks.