.. _changelog_v4_0_1:

v4.0.1
======

v4.0.1 adds a basic GC2145 camera driver, makes the OV7670 clock configurable,
and fixes the OV767x driver, :class:`pyb.Servo` timer, AMG8833 init, and H7 USB
ULPI low-power mode. It introduces **no breaking API changes** — v4.0.0
scripts run unchanged.

.. contents:: On this page
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Highlights
----------

- **GC2145** camera sensor — basic driver added.
- **OV7670** clock (CLKRC) is now configurable.
- Fixes for the OV767x driver, :class:`pyb.Servo` timer, AMG8833, and H7 USB
  ULPI low-power mode.
- **No breaking API changes** — reflash and your v4.0.0 scripts run
  unchanged.

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

- **GC2145** — added a basic GC2145 camera sensor driver.
- **OV7670** — the OV7670 clock rate (CLKRC) is now configurable.

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

- The LWIP networking stack was reverted to a stable release for more
  reliable WiFi/Ethernet; the Arduino Portenta H7 SPI2 bus was enabled.

Bug fixes
---------

- Fixed the OV767x camera driver, the :class:`pyb.Servo` timer, AMG8833 thermal
  sensor initialization, STM32 H7 USB ULPI low-power mode, and Ethernet
  low-power-mode init.

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

- **GC2145** camera sensor (basic support).
- **Arduino Portenta H7** — SPI2 bus enabled.

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

v4.0.1 introduces **no breaking Python API changes**. Scripts that ran on
v4.0.0 run unchanged on v4.0.1 — just reflash the firmware.