PlatformIO Open Source August Updates
New boards and dev-kits, Support for the latest ESP-IDF and Zephyr RTOS, Updates for Espressif32, ST STM32 and Nordic nRF52
Welcome to the August 2025 updates of PlatformIO Open Source professional collaborative platform for embedded development.
This month we received a lot of helpful feedback from our community, which let us identify the most important parts of our OSS ecosystem that required our attention, so there are plenty of updates pushed in this month that we hope you will like.
During August, we added support for the latest ESP-IDF and Zephyr frameworks, rolled out updates for several popular development platforms, fixed a lot of issues. Some of the key highlights include:
- ESP-IDF v5.5
- Zephyr RTOS v4.2
- Espressif32 dev-platform v6.12
- ST STM32 dev-platform v19.3
- Nordic nRF52 dev-platform v10.10
ESP-IDF v5.5
We’re happy to announce updated support for the latest release of ESP-IDF v5.5 - the official development framework for the ESP32, ESP32-S and ESP32-C Series SoCs. It provides a self-sufficient SDK for any generic application development on these platforms, using programming languages such as C and C++. ESP-IDF currently powers millions of devices in the field, and enables building a variety of network-connected products, ranging from simple light bulbs and toys to big appliances and industrial devices.
Major enhancements in v5.5:
- Added UART DMA driver support
- Added support for std::filesystem
- Supported BR/EDR (e)SCO and Wi-Fi coexistence.
- Updated mbedTLS version to 3.6.3
- Greatly improved support for placing IRAM code into flash
More information on project configuration for ESP-IDF can be found here.
Related resources for ESP-IDF:
Zephyr RTOS v4.2
We’re happy to announce updated support for the latest release v4.2 of Zephyr Project - a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource-constrained devices, and built with safety and security in mind.
Major enhancements in v4.2.0:
- The networking stack now includes full support for the MQTT 5.0 protocol.
- The Bluetooth Classic stack now includes support for Hands-Free Profile (HFP) for both Audio Gateway (AG) and Hands-Free (HF) roles.
- Updated Mbed TLS to version 3.6.4
Related resources for Zephyr framework:
- Release notes for v4.2.0
- Documentation for Zephyr framework
- Supported development platforms
- Supported boards
Espressif32 dev-platform v6.12
The new release of the Espressif 32 dev-platform brings support for the latest ESP-IDF, new boards and several improvements:
- Added new boards:
Cezerio dev ESP32C6Cezerio mini dev ESP32C6
- Added support for ESP-IDF v5.5 (release notes)
- Updated CMake packages to v3.30
- Initial support for Secure Features (see instructions)
Related resources for the Espressif32 dev-platform:
ST STM32 dev-platform v19.3
The new release of the ST STM32 dev-platform comes with support for the latest Zephyr RTOS and bug fixes:
- Updated Zephyr to the latest v4.2.0 (release notes)
- Fixed broken DFU uploader for STM32F103 targets
Related resources for the ST STM32 dev-platform:
Nordic nRF52 dev-platform v10.10
The new release of the Nordic nRF52 dev-platform brings support for the latest Adafruit Arduino Core:
- Updated Adafruit Arduino Core to the latest v1.7.0 (release notes)
Related resources for the Nordic nRF52 dev-platform:
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