Zephyr 4.5.0 (Working Draft)

We are pleased to announce the release of Zephyr version 4.5.0.

Major enhancements with this release include:

An overview of the changes required or recommended when migrating your application from Zephyr v4.4.0 to Zephyr v4.5.0 can be found in the separate migration guide.

The following sections provide detailed lists of changes by component.

API Changes

Removed APIs and options

The following deprecated networking options and APIs have been removed:
- CONFIG_NET_TC_SKIP_FOR_HIGH_PRIO
- CONFIG_NET_SOCKETS_POLL_MAX
- net_ipv6_set_hop_limit()
- net_if_ipv4_get_netmask()
- net_if_ipv4_set_netmask()
- net_if_ipv4_set_netmask_by_index()
- openthread_state_changed_cb_register()
- openthread_state_changed_cb_unregister()
- openthread_start()
- openthread_api_mutex_lock()
- openthread_api_mutex_try_lock()
- openthread_api_mutex_unlock()
- struct openthread_state_changed_cb
- TLS_CREDENTIAL_SERVER_CERTIFICATE

Deprecated APIs and options

DMIC
- The _dmic_ops struct has been deprecated. DMIC drivers are now expected to use the DEVICE_API macro to declare their driver API.
LoRa
- Renamed lora_recv_duty_cycle() to lora_recv_duty_cycle_async() to be consistent with the existing sync/async naming convention.
Ring buffer
- The ring buffer item API (ring_buf_item_init(), ring_buf_item_put(), ring_buf_item_get(), ring_buf_item_space_get()) has been deprecated in favor of sys_ringq (see sys_ringq Data Structure).

New APIs and options

Audio
- pcm_stream_cfg.gain_db
lora_recv_duty_cycle_async()
sys_ringq (see sys_ringq Data Structure)

New Boards

New Shields

New Drivers

New Samples

MCTP I2C GPIO Top Node Sample (renamed from mctp_i2c_bus_owner)
MCTP I3C Top Node Sample (renamed from mctp_i3c_bus_owner)

Libraries / Subsystems

LoRa / LoRaWAN
- Added a native LoRaWAN backend (CONFIG_LORA_MODULE_BACKEND_NATIVE) that implements LoRaWAN 1.0.x Class A directly on top of the LoRa radio driver, without the Semtech LoRaMac-node dependency. Currently supports the EU868 region.