.. _changelog_v3_6_9:

v3.6.9
======

v3.6.9 brings **WiFi to the Arduino Portenta H7** — the LWIP networking stack
and Cypress CYW43 drivers were added and WiFi was enabled — along with
external-flash storage init and a batch of Portenta clock/memory and
networking stability fixes. It introduces **no breaking API changes** —
v3.6.8 scripts run unchanged.

.. contents:: On this page
   :local:
   :depth: 1

Highlights
----------

- **Portenta H7 WiFi** — LWIP stack and Cypress CYW43 WiFi drivers added and
  WiFi enabled, with a separate CYW43 firmware image shipped in the release.
- **External-flash storage** — storage is now initialized on boards with
  external flash, plus a memory-mapped external-flash region.
- **Stability** — Portenta clock/memory (FMC/SDRAM, QSPI, PLL1) and
  networking init/de-init fixes.
- **No breaking API changes** — reflash and your v3.6.8 scripts run
  unchanged.

New features
------------

- **Portenta H7 WiFi** — added the LWIP library and CYW43 drivers (LWIP and
  CYW43 submodules), enabled WiFi on the Portenta, generated a separate CYW43
  firmware image, and added the CYW4343 firmware binary to the release
  deliverables.
- **External flash** — storage is now initialized on boards with external
  flash, with a configurable linker section for the CYW43 firmware and a
  memory-mapped external-flash region.

Other changes and improvements
------------------------------

- Used the highest-priority MPU region for DMA buffers and added the CYW43 /
  LWIP initialization paths in ``main``.

Bug fixes
---------

Portenta and memory:

- Fixed the Portenta FMC/SDRAM and QSPI PLL settings, the QSPI prescaler, the
  QSPI MPU config, and PLL1.

Networking and system:

- Fixed the WiFi initialization functions, added the missing LWIP/CYW43
  initialization in ``main``, called network de-init in ``main``, fixed SDIO
  DMA transfers, the USBDBG IRQn bug, and de-init the I2C bus before
  re-initializing it.

Hardware and board support
--------------------------

- **Arduino Portenta H7** — WiFi (CYW43 / LWIP) and external-flash storage.

Breaking API changes
--------------------

v3.6.9 introduces **no breaking Python API changes**. Scripts that ran on
v3.6.8 run unchanged on v3.6.9 — just reflash the firmware.