Zephyr 4.2.0 (Working Draft)

We are pleased to announce the release of Zephyr version 4.2.0.

Major enhancements with this release include:

Initial Support for Renesas RX

The Renesas RX architecture is now supported, including a QEMU-based board target.

USB Video Class Driver

The USB device stack now supports USB Video Class (UVC) allowing camera devices and other image/video sources to be exposed as standard USB video devices. See USB Video webcam to get started.

Twister Power Harness

A new Twister harness enables measurement of the power consumption of the device under test and ensures it remains within a given tolerance.

MQTT 5.0

The networking stack now includes full support for the MQTT 5.0 protocol.

Bluetooth Classic improvements

The Bluetooth Classic stack now includes support for Hands-Free Profile (HFP) for both Audio Gateway (AG) and Hands-Free (HF) roles.

Zbus

The Zbus library graduates to stable status with the release of API version v1.0.0.

Expanded Board Support

Support for 96 new boards and 22 new shields has been added in this release.

An overview of the changes required or recommended when migrating your application from Zephyr v4.1.0 to Zephyr v4.2.0 can be found in the separate migration guide.

The following sections provide detailed lists of changes by component.

Security Vulnerability Related

The following CVEs are addressed by this release:

• CVE 2025-27809 TLS clients may unwittingly skip server authentication

• CVE 2025-27810 Potential authentication bypass in TLS handshake

• CVE 2025-2962 Infinite loop in dns_copy_qname

• CVE 2025-52496 Race condition in AESNI support detection

• CVE 2025-52497 Heap buffer under-read when parsing PEM-encrypted material

• CVE 2025-49600 Unchecked return value in LMS verification allows signature bypass

• CVE 2025-49601 Out-of-bounds read in mbedtls_lms_import_public_key()

• CVE 2025-49087 Timing side-channel in block cipher decryption with PKCS#7 padding

• CVE 2025-48965 NULL pointer dereference after using mbedtls_asn1_store_named_data()

• CVE 2025-47917 Misleading memory management in mbedtls_x509_string_to_names()

• CVE 2025-7403: Under embargo until 2025-09-05

More detailed information can be found in: https://docs.zephyrproject.org/latest/security/vulnerabilities.html

API Changes

Removed APIs and options

• Removed the deprecated net_buf_put() and net_buf_get() API functions.

• Removed the deprecated include/zephyr/net/buf.h header file.

• Removed the --disable-unrecognized-section-test Twister option. Test has been removed and the option became the default behavior.

• Removed the deprecated kscan subsystem.

• Removed meas,ms5837 and replaced with meas,ms5837-30ba and meas,ms5837-02ba.

• Removed the get_ctrl driver API from video_driver_api.

• Removed CONFIG_I3C_USE_GROUP_ADDR and support for group addresses for I3C devices.

Deprecated APIs and options

• The scheduler Kconfig options CONFIG_SCHED_DUMB and CONFIG_WAITQ_DUMB were renamed and deprecated. Use CONFIG_SCHED_SIMPLE and CONFIG_WAITQ_SIMPLE instead.

• The CONFIG_LWM2M_ENGINE_MESSAGE_HEADER_SIZE Kconfig option has been removed. The required header size should be included in the message size, configured using CONFIG_LWM2M_COAP_MAX_MSG_SIZE. Special care should be taken to ensure that the CoAP block size used (CONFIG_LWM2M_COAP_BLOCK_SIZE) can fit the given message size with headers. Previous headroom was 48 bytes.

• TLS credential type TLS_CREDENTIAL_SERVER_CERTIFICATE was renamed and deprecated, use TLS_CREDENTIAL_PUBLIC_CERTIFICATE instead.

• arduino_uno_r4_minima and arduino_uno_r4_wifi board targets have been deprecated in favor of a new arduino_uno_r4 board with revisions (arduino_uno_r4@minima and arduino_uno_r4@wifi).

• esp32c6_devkitc board target has been deprecated and renamed to esp32c6_devkitc/esp32c6/hpcore.

• xiao_esp32c6 board target has been deprecated and renamed to xiao_esp32c6/esp32c6/hpcore.

• CONFIG_HAWKBIT_DDI_NO_SECURITY Kconfig option has been deprecated, because support for anonymous authentication had been removed from the hawkBit server in version 0.8.0.

• The CONFIG_BT_CONN_TX_MAX Kconfig option has been deprecated. The number of pending TX buffers is now aligned with the CONFIG_BT_BUF_ACL_TX_COUNT Kconfig option.

• The CONFIG_CRYPTO_TINYCRYPT_SHIM Kconfig option has been removed. It was deprecated since Zephyr 4.0, and users were advised to migrate to alternative crypto backends.

• The CONFIG_BT_MESH_USES_TINYCRYPT Kconfig option has been removed. It was deprecated since Zephyr 4.0. Users were advised to use CONFIG_BT_MESH_USES_MBEDTLS_PSA or CONFIG_BT_MESH_USES_TFM_PSA instead.

Stable API changes in this release

• The API signature of net_mgmt event handler net_mgmt_event_handler_t and request handler net_mgmt_request_handler_t has changed. The event value type is changed from uint32_t to uint64_t.

New APIs and options

• Architectures

  • NIOS2 Architecture was removed from Zephyr.

  • ARCH_HAS_VECTOR_TABLE_RELOCATION

  • CONFIG_SRAM_VECTOR_TABLE moved from zephyr/Kconfig.zephyr to zephyr/arch/Kconfig and added dependencies to it.

• Kernel

• K_TIMEOUT_ABS_SEC

• timespec_add()

• timespec_compare()

• timespec_equal()

• timespec_is_valid()

• timespec_negate()

• timespec_normalize()

• timespec_from_timeout()

• timespec_to_timeout()

• k_heap_array_get()

• I2C

  • i2c_configure_dt().

  • I2C_DEVICE_DT_DEINIT_DEFINE

  • I2C_DEVICE_DT_INST_DEINIT_DEFINE

• I3C

  • CONFIG_I3C_MODE

  • CONFIG_I3C_CONTROLLER_ROLE_ONLY

  • CONFIG_I3C_TARGET_ROLE_ONLY

  • CONFIG_I3C_DUAL_ROLE

  • i3c_ccc_do_rstdaa()

• SPI

  • SPI_DEVICE_DT_DEINIT_DEFINE

  • SPI_DEVICE_DT_INST_DEINIT_DEFINE

• Bluetooth

  • Audio

    • BT_BAP_ADV_PARAM_CONN_QUICK

    • BT_BAP_ADV_PARAM_CONN_REDUCED

    • BT_BAP_CONN_PARAM_SHORT_7_5

    • BT_BAP_CONN_PARAM_SHORT_10

    • BT_BAP_CONN_PARAM_RELAXED

    • BT_BAP_ADV_PARAM_BROADCAST_FAST

    • BT_BAP_ADV_PARAM_BROADCAST_SLOW

    • BT_BAP_PER_ADV_PARAM_BROADCAST_FAST

    • BT_BAP_PER_ADV_PARAM_BROADCAST_SLOW

    • bt_csip_set_member_set_size_and_rank()

    • bt_csip_set_member_get_info()

    • bt_bap_unicast_group_foreach_stream()

    • bt_cap_unicast_group_create()

    • bt_cap_unicast_group_reconfig()

    • bt_cap_unicast_group_add_streams()

    • bt_cap_unicast_group_delete()

    • bt_cap_unicast_group_foreach_stream()

  • Host

    • bt_le_get_local_features()

    • bt_le_bond_exists()

    • bt_br_bond_exists()

    • bt_conn_lookup_addr_br()

    • bt_conn_get_dst_br()

    • LE Connection Subrating is no longer experimental.

    • Remove deletion of the classic bonding information from bt_unpair(), and add bt_br_unpair().

    • Remove query of the classic bonding information from bt_foreach_bond(), and add bt_br_foreach_bond().

    • Add a new parameter limited to bt_br_set_discoverable() to support limited discoverable mode for the classic.

    • Enable retransmission and flow control for the classic L2CAP, including CONFIG_BT_L2CAP_RET, CONFIG_BT_L2CAP_FC, CONFIG_BT_L2CAP_ENH_RET, and CONFIG_BT_L2CAP_STREAM.

    • bt_avrcp_get_cap()

    • Improve the classic hands-free unit, including CONFIG_BT_HFP_HF_CODEC_NEG, CONFIG_BT_HFP_HF_ECNR, CONFIG_BT_HFP_HF_3WAY_CALL, CONFIG_BT_HFP_HF_ECS, CONFIG_BT_HFP_HF_ECC, CONFIG_BT_HFP_HF_VOICE_RECG_TEXT, CONFIG_BT_HFP_HF_ENH_VOICE_RECG, CONFIG_BT_HFP_HF_VOICE_RECG, CONFIG_BT_HFP_HF_HF_INDICATORS, CONFIG_BT_HFP_HF_HF_INDICATOR_ENH_SAFETY, and CONFIG_BT_HFP_HF_HF_INDICATOR_BATTERY.

    • Improve the classic hands-free audio gateway, including CONFIG_BT_HFP_AG_CODEC_NEG, CONFIG_BT_HFP_AG_ECNR, CONFIG_BT_HFP_AG_3WAY_CALL, CONFIG_BT_HFP_AG_ECS, CONFIG_BT_HFP_AG_ECC, CONFIG_BT_HFP_AG_VOICE_RECG_TEXT, CONFIG_BT_HFP_AG_ENH_VOICE_RECG, CONFIG_BT_HFP_AG_VOICE_TAG, CONFIG_BT_HFP_AG_HF_INDICATORS, CONFIG_BT_HFP_AG_HF_INDICATOR_ENH_SAFETY, CONFIG_BT_HFP_AG_HF_INDICATOR_BATTERY, and CONFIG_BT_HFP_AG_REJECT_CALL.

    • Add a callback function get_ongoing_call() to bt_hfp_ag_cb.

    • bt_hfp_ag_ongoing_calls()

    • Support the classic L2CAP signaling echo request and response feature, including bt_l2cap_br_echo_cb, bt_l2cap_br_echo_cb_register(), bt_l2cap_br_echo_cb_unregister(), bt_l2cap_br_echo_req(), and bt_l2cap_br_echo_rsp().

    • bt_a2dp_get_conn()

    • bt_rfcomm_send_rpn_cmd()

• Build system

  • Sysbuild

    • Firmware loader image setup/selection support added to sysbuild when using SB_CONFIG_MCUBOOT_MODE_FIRMWARE_UPDATER via SB_CONFIG_FIRMWARE_LOADER e.g. SB_CONFIG_FIRMWARE_LOADER_IMAGE_SMP_SVR for selecting SMP server.

    • Single app RAM load support added to sysbuild using SB_CONFIG_MCUBOOT_MODE_SINGLE_APP_RAM_LOAD.

• Display

  • display_clear()

• LVGL (Light and Versatile Graphics Library)

  • The LVGL module was synchronized to v9.3, bringing numerous upstream improvements and new features.

  • LVGL subsystem now supports multiple simultaneous displays, including proper input device-to-display binding.

  • Added L8/Y8 pixel format support for displays such as SSD1327, SSD1320, SSD1322, and ST75256.

  • CONFIG_LV_Z_COLOR_MONO_HW_INVERSION

• Management

  • MCUmgr

    • Firmware loader support added to image mgmt group using CONFIG_MCUBOOT_BOOTLOADER_MODE_FIRMWARE_UPDATER.

    • Optional boot mode (using retention boot mode) added to OS group reset command using CONFIG_MCUMGR_GRP_OS_RESET_BOOT_MODE.

• Networking:

  • CoAP

    • COAPS_SERVICE_DEFINE

  • DHCPv4

    • CONFIG_NET_DHCPV4_INIT_REBOOT

  • DNS

    • dns_resolve_service()

    • dns_resolve_reconfigure_with_interfaces()

  • HTTP

    • CONFIG_HTTP_SERVER_COMPRESSION

  • IPv4

    • CONFIG_NET_IPV4_MTU

  • LwM2M

    • CONFIG_LWM2M_SERVER_BOOTSTRAP_ON_FAIL

    • Implemented Greater Than, Less Than and Step observe attributes handling (see CONFIG_LWM2M_MAX_NOTIFIED_NUMERICAL_RES_TRACKED).

  • Misc

    • net_if_oper_state_change_time()

  • MQTT

    • CONFIG_MQTT_VERSION_5_0

    • mqtt_transport.if_name

  • OpenThread

    • Moved OpenThread-related Kconfig options from subsys/net/l2/openthread/Kconfig to modules/openthread/Kconfig.

    • Refactored OpenThread networking API, see the OpenThread section of the migration guide.

    • CONFIG_OPENTHREAD_SYS_INIT

    • CONFIG_OPENTHREAD_SYS_INIT_PRIORITY

  • SNTP

    • sntp_init_async()

    • sntp_send_async()

    • sntp_read_async()

    • sntp_close_async()

  • Sockets

    • CONFIG_NET_SOCKETS_INET_RAW

    • socket_offload_dns_enable()

    • Added a new documentation page for Socket Services library.

    • New socket options:

      • IP_MULTICAST_LOOP

      • IPV6_MULTICAST_LOOP

      • TLS_CERT_VERIFY_RESULT

  • Wi-Fi

    • CONFIG_WIFI_USAGE_MODE

    • Added a new section to the Wi-Fi Management documentation (doc/connectivity/networking/api/wifi.rst) with step-by-step instructions for generating test certificates for Wi-Fi using FreeRADIUS scripts. This helps users reproduce the process for their own test environments.

    • Changed the hostap IPC mechanism from socketpair to k_fifo. Depending on the enabled Wi-Fi configuration options, this can save up to 6-8 kB memory when using native Wi-Fi stack.

  • zperf

    • CONFIG_ZPERF_SESSION_PER_THREAD

    • zperf_upload_params.data_loader

    • CONFIG_NET_ZPERF_SERVER

• Power management

  • CONFIG_PM_DEVICE_RUNTIME_USE_SYSTEM_WQ

  • CONFIG_PM_DEVICE_RUNTIME_USE_DEDICATED_WQ

  • CONFIG_PM_DEVICE_DRIVER_NEEDS_DEDICATED_WQ

  • CONFIG_PM_DEVICE_RUNTIME_DEDICATED_WQ_STACK_SIZE

  • CONFIG_PM_DEVICE_RUNTIME_DEDICATED_WQ_PRIO

  • CONFIG_PM_DEVICE_RUNTIME_DEDICATED_WQ_INIT_PRIO

  • CONFIG_PM_DEVICE_RUNTIME_ASYNC

• Sensor

  • sensor_value_to_deci()

  • sensor_value_to_centi()

• Stepper

  • stepper_stop()

• Storage

  • flash_area_copy()

• Counter

  • counter_reset()

• Sys

  • util_eq()

  • util_memeq()

  • sys_clock_gettime()

  • sys_clock_settime()

  • sys_clock_nanosleep()

• LoRaWAN

  • lorawan_request_link_check()

• Video

  • video_api_ctrl_t

  • video_query_ctrl()

  • video_print_ctrl()

  • video_api_selection_t

  • video_set_selection()

  • video_get_selection()

  • video-sw-generator

  • video_get_csi_link_freq()

  • VIDEO_CID_LINK_FREQ

  • VIDEO_CID_AUTO_WHITE_BALANCE and other controls from the BASE control class.

  • VIDEO_CID_EXPOSURE_ABSOLUTE and other controls from the CAMERA control class.

  • VIDEO_PIX_FMT_Y10 and Y12, Y14, Y16 variants

  • VIDEO_PIX_FMT_SRGGB10P and 12P, 14P variants, for all 4 bayer variants.

  • video_buffer.index field

  • video_ctrl_query.int_menu field

  • VIDEO_MIPI_CSI2_DT_NULL and other MIPI standard values

• PCIe

  • CONFIG_NVME_PRP_PAGE_SIZE

• Debug

  • Core Dump

    • CONFIG_DEBUG_COREDUMP_THREAD_STACK_TOP, enabled by default for ARM Cortex M when CONFIG_DEBUG_COREDUMP_MEMORY_DUMP_MIN is selected.

    • CONFIG_DEBUG_COREDUMP_BACKEND_IN_MEMORY

    • CONFIG_DEBUG_COREDUMP_BACKEND_IN_MEMORY_SIZE

• UpdateHub

  • updatehub_report_error()

• USB

  • uvc_set_video_dev()

• ZBus

  • Zbus has achieved stable status with the release of API version v1.0.0.

  • Runtime observers can work without heap. Now it is possible to choose between static, dynamic, and none allocation for the runtime observers nodes.

  • Runtime observers using CONFIG_ZBUS_RUNTIME_OBSERVERS_NODE_ALLOC_NONE must use the new function zbus_chan_add_obs_with_node().

  • CONFIG_ZBUS_RUNTIME_OBSERVERS_NODE_ALLOC_DYNAMIC

  • CONFIG_ZBUS_RUNTIME_OBSERVERS_NODE_ALLOC_STATIC

  • CONFIG_ZBUS_RUNTIME_OBSERVERS_NODE_ALLOC_NONE

  • CONFIG_ZBUS_RUNTIME_OBSERVERS_NODE_POOL_SIZE

New Boards

• Adafruit Industries, LLC

  • Adafruit Feather ESP32S2 (adafruit_feather_esp32s2)

  • Adafruit Feather ESP32S2 TFT (adafruit_feather_esp32s2_tft)

  • Adafruit Feather ESP32S2 TFT Reverse (adafruit_feather_esp32s2_tft_reverse)

  • Adafruit Feather ESP32S3 (adafruit_feather_esp32s3)

  • Adafruit Feather ESP32S3 TFT (adafruit_feather_esp32s3_tft)

  • Adafruit ESP32-S3 Reverse TFT Feather (adafruit_feather_esp32s3_tft_reverse)

• Advanced Micro Devices (AMD), Inc.

  • Versal 2 RPU development board (versal2_rpu)

  • Versal NET RPU development board (versalnet_rpu)

• Aesc Silicon

  • ElemRV-N (elemrv)

• Ai-Thinker Co., Ltd.

  • Ai-Thinker WB2-12F development board (ai_wb2_12f)

• Ambiq Micro, Inc.

  • Apollo510 SOC Evaluation Board (apollo510_evb)

• Analog Devices, Inc.

  • max32657evkit (max32657evkit)

• Arduino

  • Arduino Nano Matter (arduino_nano_matter)

  • Arduino Portenta C33 (arduino_portenta_c33)

• ARM Ltd.

  • MPS4 (mps4)

• BeagleBoard.org Foundation

  • PocketBeagle 2 (pocketbeagle_2)

• Blues Wireless

  • Cygnet (cygnet)

• Bouffalo Lab (Nanjing) Co., Ltd.

  • BL604E IOT DVK development board (bl604e_iot_dvk)

• Doctors of Intelligence & Technology

  • DT-BL10 coexistence Module Development Kit (dt_bl10_devkit)

• ENE Technology, Inc.

  • ENE KB1062_EVB (kb1062_evb)

• Espressif Systems

  • ESP32-DevKitC (esp32_devkitc)

• Ezurio

  • BL54L15 DVK (bl54l15_dvk)

  • BL54L15u DVK (bl54l15u_dvk)

• FANKE Technology Co., Ltd.

  • FK743M5-XIH6 (fk743m5_xih6)

• IAR Systems AB

  • STM32F429II-ACA (stm32f429ii_aca)

• Infineon Technologies

  • XMC7200 Evaluation Kit (kit_xmc72_evk)

• Intel Corporation

  • Bartlett Lake P CRB (intel_btl_s_crb)

• ITE Tech. Inc.

  • IT51XXX series (it515xx_evb)

• KWS Computersysteme Gmbh

  • Pico2-SPE (pico2_spe)

  • Pico-SPE (pico_spe)

• Lilygo Shenzhen Xinyuan Electronic Technology Co., Ltd

  • T-Dongle S3 (tdongle_s3)

  • TTGO TBeam (ttgo_tbeam)

  • TTGO T-OI-PLUS (ttgo_toiplus)

  • T-Watch S3 (twatch_s3)

• M5Stack

  • Fire (m5stack_fire)

• Microchip Technology Inc.

  • MEC17xxEVB ASSY6941 (mec_assy6941)

  • SAMA7G54 Evaluation Kit (sama7g54_ek)

• MikroElektronika d.o.o.

  • MikroE Quail (mikroe_quail)

• Nordic Semiconductor

  • nRF54LM20 DK (nrf54lm20dk)

• Nuvoton Technology Corporation

  • NPCK3M8K_EVB (npck3m8k_evb)

  • NUMAKER M55M1 (numaker_m55m1)

• NXP Semiconductors

  • FRDM-MCXA153 (frdm_mcxa153)

  • FRDM-MCXA166 (frdm_mcxa166)

  • FRDM-MCXA276 (frdm_mcxa276)

  • i.MX943 EVK (imx943_evk)

  • MCX-N9XX-EVK (mcx_n9xx_evk)

  • S32K148EVB-Q176 (s32k148_evb)

• Octavo Systems LLC

  • OSD32MP1-BRK (osd32mp1_brk)

• OpenHW Group

  • cv32a6_genesys_2 (cv32a6_genesys_2)

  • cv64a6_genesys_2 (cv64a6_genesys_2)

• Pimoroni Ltd.

  • Pimoroni Pico Plus2 (pico_plus2)

• QEMU

  • QEMU Emulation for Renesas RX (qemu_rx)

• Raytac Corporation

  • AN54L15Q-DB (raytac_an54l15q_db)

  • AN7002Q-DB-5340 (raytac_an7002q_db)

  • MDBT50Q-CX-40 Dongle (raytac_mdbt50q_cx_40_dongle)

• Renesas Electronics Corporation

  • RA8P1 Evaluation Kit (ek_ra8p1)

  • Renesas Starter Kit for RX130 (rsk_rx130)

  • RZ/A2M Evaluation Kit (rza2m_evk)

  • RZ/A3UL SMARC Evaluation Board Kit (rza3ul_smarc)

  • RZ/G2L SMARC Evaluation Board Kit (rzg2l_smarc)

  • RZ/G2LC SMARC Evaluation Board Kit (rzg2lc_smarc)

  • RZ/G2UL SMARC Evaluation Board Kit (rzg2ul_smarc)

  • Renesas Starter Kit+ for RZ/N2L (rzn2l_rsk)

  • Renesas Starter Kit+ for RZ/T2L (rzt2l_rsk)

  • Renesas Starter Kit+ for RZ/T2M (rzt2m_rsk)

  • RZ/V2H Evaluation Board Kit (rzv2h_evk)

  • RZ/V2L SMARC Evaluation Board Kit (rzv2l_smarc)

  • RZ/V2N Evaluation Board Kit (rzv2n_evk)

• Seeed Technology Co., Ltd

  • XIAO MG24 (xiao_mg24)

  • XIAO RA4M1 (xiao_ra4m1)

• sensry.io

  • Ganymed Starter Kit (SK) (ganymed_sk)

• Shanghai Ruiside Electronic Technology Co., Ltd.

  • ART-Pi2 (art_pi2)

  • RA8D1 Vision Board (ra8d1_vision_board)

• Silicon Laboratories

  • SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash + 8 MB ext PSRAM Radio Board (SLWRB4342A) (siwx917_rb4342a)

  • EFR32xG21 2.4 GHz 20 dBm (SLWRB4180B) (slwrb4180b)

• Space Cubics, LLC

  • SC-OBC Module A1 (scobc_a1)

• STMicroelectronics

  • Nucleo F439ZI (nucleo_f439zi)

  • Nucleo U385RG Q (nucleo_u385rg_q)

  • Nucleo WBA65RI (nucleo_wba65ri)

  • STM32H757I Eval (stm32h757i_eval)

  • STM32MP135F-DK Discovery (stm32mp135f_dk)

  • STM32MP257F-EV1 Evaluation Board (stm32mp257f_ev1)

  • STM32U5G9J Discovery Kit 1 (stm32u5g9j_dk1)

  • STM32U5G9J Discovery Kit (stm32u5g9j_dk2)

• Texas Instruments

  • TI AM243x-EVM (am243x_evm)

  • MSPM0G3507 Launchpad (lp_mspm0g3507)

  • SK-AM64 (sk_am64)

• u-blox

  • EVK-IRIS-W106-RW612 (ubx_evk_iris_w1)

• Variscite Ltd.

  • DART-MX8M-PLUS (imx8mp_var_dart)

  • VAR-SOM-MX8M-PLUS (imx8mp_var_som)

  • DART-MX93 (imx93_var_dart)

  • VAR-SOM-MX93 (imx93_var_som)

• Waveshare Electronics

  • ESP32-S3-Matrix (esp32s3_matrix)

  • RP2040-Plus (rp2040_plus)

• WeAct Studio

  • BluePill Plus CH32V203 (bluepillplus_ch32v203)

  • STM32F446 Core Board V1.1 (weact_stm32f446_core)

• WinChipHead

  • WCH CH32V003F4P6 Development Board (ch32v003f4p6_dev_board)

  • WCH CH32V006EVT (ch32v006evt)

  • WCH CH32V303VCT6_EVT (ch32v303vct6_evt)

  • WCH LinkW (linkw)

• WIZnet Co., Ltd.

  • W5500-EVB-Pico2 (w5500_evb_pico2)

• Würth Elektronik GmbH.

  • Ophelia-IV DK (ophelia4ev)

New shields

• Arduino Giga Display Shield

• Arduino Modulino Buttons

• Arduino Modulino SmartLEDs

• DVP 20-pin OV7670

• EVAL AD4052 ARDZ

• EVAL ADXL367 ARDZ

• M5Stack Cardputer

• MikroElektronika LTE IoT10 Click

• MikroElektronika Stepper 18 Click

• MikroElektronika Stepper 19 Click

• NPM2100 Evaluation Kit

• NXP ADTJA1101

• NXP M2 WiFi BT

• OpenThread RCP Arduino

• RTK7 EKA6M3B00001BU

• RTKLCDPAR1S00001BE Display

• ST B-CAMS-IMX-MB1854

• ST MB1897 camera module

• ST STM32F4DIS CAM

• Waveshare Pico LCD 1.14

• Waveshare Pico OLED 1.3

• X-Nucleo-GFX01M2

New Drivers

• ADC

  • adi,ad4050-adc

  • adi,ad4052-adc

  • adi,ad4130-adc

  • ene,kb106x-adc

  • ite,it51xxx-adc

  • microchip,mcp356xr

  • realtek,rts5912-adc

  • renesas,rz-adc

  • silabs,siwx91x-adc

  • ti,am335x-adc

  • ti,cc23x0-adc

  • wch,adc

• Audio

  • ambiq,pdm

  • maxim,max98091

  • ti,pcm1681

  • ti,tlv320aic3110

  • wolfson,wm8962

• Auxiliary Display

  • gpio-7-segment

• CAN

  • adi,max32-can

  • renesas,rz-canfd

  • renesas,rz-canfd-global

• Charger

  • ti,bq25713

  • x-powers,axp2101-charger

• Clock control

  • bflb,bclk

  • bflb,bl60x-clock-controller

  • bflb,bl60x-pll

  • bflb,bl60x-root-clk

  • bflb,clock-controller

  • ite,it51xxx-ecpm

  • microchip,sam-pmc

  • microchip,sama7g5-sckc

  • nordic,nrf51-hfxo

  • nordic,nrf52-hfxo

  • nordic,nrf54l-hfxo

  • nordic,nrfs-audiopll

  • renesas,rx-cgc-pclk

  • renesas,rx-cgc-pclk-block

  • renesas,rx-cgc-pll

  • renesas,rx-cgc-root-clock

  • renesas,rza2m-cpg

  • st,stm32mp13-cpu-clock-mux

  • st,stm32mp13-pll-clock

  • st,stm32mp2-rcc

  • st,stm32u3-msi-clock

  • ti,mspm0-clk

  • ti,mspm0-osc

  • ti,mspm0-pll

  • wch,ch32v20x_30x-pll-clock

• Comparator

  • ite,it51xxx-vcmp

  • renesas,ra-acmphs

  • renesas,ra-acmphs-global

• Counter

  • adi,max32-wut

  • espressif,esp32-counter

  • ite,it51xxx-counter

  • ite,it8xxx2-counter

  • neorv32,gptmr

  • realtek,rts5912-timer

  • ti,cc23x0-lgpt

  • ti,cc23x0-rtc

  • ti,mspm0-timer-counter

  • wch,gptm

  • zephyr,native-sim-counter

• CPU

  • arm,cortex-r8

  • intel,bartlett-lake

  • openhwgroup,cva6

  • renesas,rx

  • wch,qingke-v4b

  • wch,qingke-v4c

  • wch,qingke-v4f

  • zephyr,native-sim-cpu

• Cryptographic accelerator

  • ite,it51xxx-sha

  • realtek,rts5912-sha

  • ti,cc23x0-aes

• DAC

  • nxp,dac12

  • ti,dac161s997

• Debug

  • silabs,pti

• Display

  • sinowealth,sh1122

  • sitronix,st75256

  • sitronix,st7567

  • sitronix,st7701

  • solomon,ssd1320

  • solomon,ssd1327fb

  • solomon,ssd1331

  • solomon,ssd1351

  • solomon,ssd1363

  • zephyr,displays

• DMA

  • renesas,rz-dma

  • ti,cc23x0-dma

  • wch,wch-dma

• EDAC

  • xlnx,zynqmp-ddrc-2.40a

• eSPI

  • realtek,rts5912-espi

• Ethernet

  • ethernet-phy

  • microchip,vsc8541

  • nxp,netc-ptp-clock

  • nxp,tja11xx

  • st,stm32-ethernet-controller

  • st,stm32n6-ethernet

  • ti,dp83867

  • xlnx,axi-ethernet-1.00.a

• Firmware

  • nxp,scmi-cpu

  • ti,k2g-sci

• Flash controller

  • realtek,rts5912-flash-controller

  • renesas,ra-ospi-b-nor

  • renesas,rx-flash

  • silabs,series2-flash-controller

  • st,stm32u3-flash-controller

• File system

  • zephyr,fstab,fatfs

• Fuel gauge

  • onnn,lc709203f

  • x-powers,axp2101-fuel-gauge

• GNSS

  • u-blox,f9p

• GPIO

  • adi,max14915-gpio

  • adi,max14917-gpio

  • adi,max22199-gpio

  • arducam,dvp-20pin-connector

  • bflb,gpio

  • ene,kb106x-gpio

  • espressif,esp32-lpgpio

  • ite,it51xxx-gpio

  • nordic,npm1304-gpio

  • nxp,lcd-pmod

  • raspberrypi,csi-connector

  • raspberrypi,pico-gpio-port

  • renesas,ra-parallel-graphics-header

  • renesas,rx-gpio

  • renesas,rza2m-gpio

  • renesas,rza2m-gpio-int

  • st,stm32mp2-gpio

  • ti,mspm0-gpio

• IEEE 802.15.4 HDLC RCP interface

  • spi,hdlc-rcp-if

• I2C

  • cdns,i2c

  • ite,it51xxx-i2c

  • litex,litei2c

  • realtek,rts5912-i2c

  • renesas,ra-i2c-sci-b

  • renesas,rx-i2c

  • renesas,rz-riic

  • sensry,sy1xx-i2c

  • wch,i2c

• I2S

  • ambiq,i2s

  • nordic,nrf-tdm

  • renesas,ra-i2s-ssie

  • silabs,siwx91x-i2s

  • st,stm32-sai

• I3C

  • ite,it51xxx-i3cm

  • ite,it51xxx-i3cs

  • renesas,ra-i3c

• IEEE 802.15.4

  • espressif,esp32-ieee802154

• Input

  • arduino,modulino-buttons

  • ite,it51xxx-kbd

  • realtek,rts5912-kbd

  • st,stm32-tsc

  • tsc-keys

  • vishay,vs1838b

• Interrupt controller

  • ite,it51xxx-intc

  • ite,it51xxx-wuc

  • ite,it51xxx-wuc-map

  • renesas,rx-icu

  • riscv,clic

  • wch,exti

• LED

  • arduino,modulino-buttons-leds

  • dac-leds

  • nordic,npm1304-led

  • x-powers,axp192-led

  • x-powers,axp2101-led

• LED strip

  • arduino,modulino-smartleds

• Mailbox

  • arm,mhuv3

  • renesas,rz-mhu-mbox

  • ti,secure-proxy

• MDIO

  • xlnx,axi-ethernet-1.00.a-mdio

• Memory controller

  • adi,max32-hpb

  • realtek,rts5912-bbram

  • silabs,siwx91x-qspi-memory

  • st,stm32-xspi-psram

• MFD

  • adi,maxq10xx

  • ambiq,iom

  • microchip,sam-flexcom

  • nordic,npm1304

  • x-powers,axp2101

• MIPI DBI

  • nxp,mipi-dbi-dcnano-lcdif

• Miscellaneous

  • ene,kb106x-gcfg

  • nordic,ironside-call

  • nordic,nrf-mpc

  • nxp,rtxxx-dsp-ctrl

  • renesas,ra-elc

  • renesas,ra-ulpt

  • renesas,rx-external-interrupt

  • renesas,rx-mtu

  • renesas,rx-sci

  • renesas,rz-sci

  • renesas,rz-sci-b

  • st,stm32n6-ramcfg

• Modem

  • quectel,eg800q

  • simcom,a76xx

• Multi-bit SPI

  • nordic,nrf-exmif

  • snps,designware-ssi

• MTD

  • fixed-subpartitions

  • jedec,mspi-nor

  • mspi-aps-z8

  • mspi-is25xX0xx

  • renesas,ra-nv-code-flash

  • renesas,ra-nv-data-flash

  • renesas,rx-nv-flash

  • ti,tmp11x-eeprom

• Networking

  • nordic,nrf-nfct-v2

  • silabs,siwx91x-nwp

• Octal SPI

  • renesas,ra-ospi-b

• Pin control

  • ambiq,apollo5-pinctrl

  • arm,mps2-pinctrl

  • arm,mps3-pinctrl

  • arm,mps4-pinctrl

  • arm,v2m_beetle-pinctrl

  • bflb,pinctrl

  • ene,kb106x-pinctrl

  • microchip,sama7g5-pinctrl

  • nuvoton,npcx-pinctrl-npckn

  • renesas,rx-pinctrl

  • renesas,rx-pinmux

  • renesas,rza-pinctrl

  • renesas,rza2m-pinctrl

  • renesas,rzn-pinctrl

  • renesas,rzt-pinctrl

  • renesas,rzv-pinctrl

  • st,stm32n6-pinctrl

  • ti,mspm0-pinctrl

  • wch,00x-afio

  • wch,20x_30x-afio

• Power management

  • infineon,cat1b-power

  • realtek,rts5912-ulpm

• Power domain

  • ti,sci-pm-domain

• PSI5

  • nxp,s32-psi5

• PWM

  • arduino-header-pwm

  • ene,kb106x-pwm

  • ite,it51xxx-pwm

  • neorv32,pwm

  • realtek,rts5912-pwm

  • renesas,rx-mtu-pwm

  • silabs,letimer-pwm

  • silabs,siwx91x-pwm

  • silabs,timer-pwm

  • ti,mspm0-timer-pwm

  • wch,gptm-pwm

• Regulator

  • nordic,npm1304-regulator

  • x-powers,axp2101-regulator

• Reset controller

  • microchip,mpfs-reset

  • reset-mmio

• RNG

  • adi,maxq10xx-trng

  • brcm,iproc-rng200

  • virtio,device4

  • zephyr,native-sim-rng

• RTC

  • nxp,pcf2123

  • realtek,rts5912-rtc

  • silabs,siwx91x-rtc

• SDHC

  • ambiq,sdio

  • xlnx,versal-8.9a

• Sensors

  • adi,ad2s1210

  • bosch,bmm350

  • brcm,afbr-s50

  • everlight,als-pt19

  • invensense,icm40627

  • invensense,icm45686

  • invensense,icp201xx

  • liteon,ltr329

  • meas,ms5837-02ba

  • meas,ms5837-30ba

  • nordic,npm1304-charger

  • nxp,lpadc-temp40

  • nxp,tpm-qdec

  • peacefair,pzem004t

  • pixart,paa3905

  • pixart,paj7620

  • pixart,pat9136

  • pni,rm3100

  • rohm,bh1730

  • rohm,bh1790

  • st,lsm6dsv32x

  • st,lsm9ds1_mag

  • ti,tmp11x

  • vishay,veml6031

  • we,wsen-itds-2533020201601

• SENT

  • nxp,s32-sent

• Serial controller

  • aesc,uart

  • ambiq,pl011-uart

  • bflb,uart

  • ene,kb106x-uart

  • espressif,esp32-lpuart

  • ite,it51xxx-uart

  • nuvoton,npcx-uart-npckn

  • renesas,rx-uart-sci

  • renesas,rx-uart-sci-qemu

  • renesas,rz-sci-b-uart

  • renesas,rz-sci-uart

  • renesas,rza2m-scif-uart

  • ti,mspm0-uart

  • zephyr,native-pty-uart

  • zephyr,uart-bridge

• SPI

  • cdns,spi

  • ite,it51xxx-spi

  • microchip,mec5-qspi

  • renesas,rx-rspi

  • renesas,rz-rspi

  • silabs,gspi

  • ti,cc23x0-spi

  • wch,spi

• Stepper

  • adi,tmc51xx

  • allegro,a4979

• System controller

  • bflb,efuse

• Tachometer

  • ite,it51xxx-tach

  • realtek,rts5912-tach

• TCPC

  • onnn,fusb307-tcpc

• Timer

  • infineon,cat1-lp-timer

  • ite,it51xxx-timer

  • microchip,sam-pit64b

  • renesas,ra-ulpt-timer

  • renesas,rx-timer-cmt

  • renesas,rx-timer-cmt-start-control

  • renesas,rz-gtm-os-timer

  • renesas,rza2m-ostm

  • silabs,series2-letimer

  • silabs,series2-timer

  • ti,mspm0-timer

• USB

  • adi,max32-usbhs

  • nxp,uhc-ehci

  • nxp,uhc-ip3516hs

  • nxp,uhc-khci

  • nxp,uhc-ohci

  • st,stm32n6-otghs

  • zephyr,uvc-device

• Video

  • ovti,ov9655

  • sony,imx335

  • st,mipid02

  • st,stm32-dcmipp

  • zephyr,video-sw-generator

• Virtio

  • virtio,mmio

  • virtio,pci

• Watchdog

  • ene,kb106x-watchdog

  • ite,it51xxx-watchdog

  • nordic,npm1304-wdt

  • nxp,ewm

  • realtek,rts5912-watchdog

  • renesas,ra-wdt

  • silabs,siwx91x-wdt

  • ti,cc23x0-wdt

  • wch,iwdg

• Wi-Fi

  • espressif,esp-hosted

New Samples

• Audio output AMP sample.

• Audio output AMP sample.

• Blinky AMP sample

• mbox API AMP sample

• Auxiliary digits display

• BMG160 3-axis gyroscope

• Debug ULP

• Generic distance measurement

• Echo ULP

• Fatfs filesystem fstab

• Fuel Gauge

• Heart Rate Sensor

• Interrupt ULP

• Generic Light Sensor Polling

• LVGL Multi-display

• Min-Heap Data Structure

• Ambiq MSPI timing scan

• Network packet filter

• Nordic IronSide SE firmware update

• PAJ7620 Gesture Sensor

• Barometric pressure and temperature sensor interrupt example

• Barometric pressure and temperature sensor polling example

• PSI5 interface

• Renesas ELC Sample

• Renesas comparator

• OpenAMP Linux Zephyr RPMsg

• SENT interface

• SPIS wake up

• Stepper

• Generic device sample streaming using Data Ready trigger

• UART ASYNC API

• USB CDC-ACM bridge

• UUID

• USB Video webcam

• VEML6031 High Accuracy Ambient Light Sensor

Other notable changes

• Added support for Armv8.1-M MPU’s PXN (Privileged Execute Never) attribute. With this, the MPU attributes for __ramfunc and __ram_text_reloc were modified such that, PXN attribute is set for these regions if compiled with CONFIG_ARM_MPU_PXN and CONFIG_USERSPACE. This results in a change in behavior for code being executed from these regions because, if these regions have pxn attribute set in them, they cannot be executed in privileged mode.

• Removed support for Nucleo WBA52CG board (nucleo_wba52cg) since it is NRND (Not Recommended for New Design) and is no longer supported in the STM32CubeWBA from version 1.1.0 (July 2023). The migration to Nucleo WBA55CG (nucleo_wba55cg) is recommended instead.

• Updated Mbed TLS to version 3.6.4 (from 3.6.2). Release notes for 3.6.3 and 3.6.4 can be found below:

  • 3.6.3: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.3

  • 3.6.4: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.4

• Updated TF-M to version 2.1.2 (from 2.1.1). The release notes can be found at: https://trustedfirmware-m.readthedocs.io/en/tf-mv2.1.2/releases/2.1.2.html

• Updated all boards with an external I2C connectors (Qwiic, Stemma, Grove…) to use the zephyr_i2c devicetree label. This allows using the existing Shields build system feature (west build --shield) to interface any connectorized i2c module to any board with a compatible i2c port, regardless of the specific i2c connector branding.

• Reverted deprecation of receiver option in Nordic UART driver. Receiver mode which is using additional TIMER peripheral to count received bytes was previously deprecated (e.g. CONFIG_CONFIG_UART_0_NRF_HW_ASYNC). However, it turned out that this previously mode is the only one that is capable of reliably receive data without Hardware Flow Control so it should stay in the driver.