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Zephyr SDK

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Zephyr SDK

Free

Free to use; Apache 2.0 licensed; GNU, LLVM, or minimal bundle variants

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On the record

Bundle options
The SDK is distributed in GNU, LLVM, and minimal bundle variants, each including host tools.docs.zephyrproject.org · read 30 Sep 2026
Compatibility
The SDK page describes its referenced version as the recommended version for the corresponding Zephyr version and links to a compatibility matrix.docs.zephyrproject.org · read 30 Sep 2026
Emulation and debugging
The included custom QEMU and OpenOCD tools are used to emulate, flash, and debug Zephyr applications.docs.zephyrproject.org · read 30 Sep 2026
Installation
The SDK can be installed from the Zephyr repository with the command `west sdk install`.docs.zephyrproject.org · read 30 Sep 2026
Intended users
The project describes Zephyr as an RTOS for resource-constrained devices, including connected sensors, LED wearables, modems, and small wireless gateways.zephyrproject.org · read 30 Sep 2026
License
The Zephyr Project says its software is available under the Apache 2.0 open source license and free for commercial and non-commercial solutions.zephyrproject.org · read 30 Sep 2026
Operating systems
SDK bundles are available for Linux, macOS, and Windows.docs.zephyrproject.org · read 30 Sep 2026
Purpose
Zephyr SDK provides GNU and LLVM toolchains for Zephyr-supported architectures, plus host tools including custom QEMU and OpenOCD.docs.zephyrproject.org · read 30 Sep 2026
Security
Zephyr documents PSA Crypto with Mbed TLS and describes a monolithic kernel-and-application binary design.docs.zephyrproject.org · read 30 Sep 2026
Security limitation
The security overview says vendor-specific cryptographic hardware and software APIs, including TPM and TEE support, are planned.docs.zephyrproject.org · read 30 Sep 2026
Support
Community support is provided through mailing lists and Discord.docs.zephyrproject.org · read 30 Sep 2026
Target architectures
The SDK lists ARC, ARM, Microblaze, MIPS, RISC-V, RX, SPARC, x86, and Xtensa target architectures.docs.zephyrproject.org · read 30 Sep 2026

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