Platform#

Name	Status	Description	Languages
pw_rpc2	experimental	Next gen, zero-copy async RPC with end-to-end backpressure	C++
pw_transport	experimental	Asynchronous datagram-oriented transport interface	C++
pw_channel	deprecated	Async, zero-copy API for sending and receiving bytes or datagrams	C++
pw_grpc	unstable	pw_rpc over gRPC	C++
pw_hdlc	stable	Simple, robust, and efficient serial communication	Python, C++, TypeScript
pw_router	experimental	Transport-agnostic packet routing	C++
pw_rpc	stable	Efficient, low-code-size RPC system for embedded devices	C++, Java, JavaScript, Python, TypeScript
pw_rpc_transport	unstable
pw_stream	stable	A foundational interface for streaming data	C++, Rust
pw_transfer	stable

Bluetooth#

Dual-mode Bluetooth Host stack, HCI controllers, and profiles

Learn more: Bluetooth

Name	Status	Description	Languages
pw_bluetooth	unstable	Host-layer Bluetooth Low Energy APIs and utilities	C++
pw_bluetooth_hci	stable	Bluetooth Host Controller Interface utilities	C++
pw_bluetooth_profiles	unstable	Bluetooth profiles built on top of pw_bluetooth	C++
pw_bluetooth_proxy	unstable	Lightweight proxy for augmenting Bluetooth functionality	C++
pw_bluetooth_sapphire	unstable	Battle-tested Bluetooth with rock-solid reliability	C++

Observability#

Structured logging, tokenization, metrics, crash handling, and tracing

Learn more: Observability

Name	Status	Description	Languages
pw_log	stable	Robust and portable logging for embedded projects	C++, Java, Python, Rust
pw_tokenizer	stable	Compress strings to shrink logs by +75%	C, C++, Python, Rust, TypeScript, Java
pw_assert	stable	Flexible crash triggering and handling	C, C++, Rust
pw_console	stable	Multi-purpose pluggable interactive console for dev & manufacturing	Python
pw_cli_analytics	stable
pw_cpu_exception	stable
pw_format	experimental	String formatting	Rust
pw_hex_dump	stable	Handy hexdump utilities	C++
pw_metric	stable
pw_multisink	stable
pw_persistent_ram	stable	Reliable memory across reboots for crash reporting	C++
pw_snapshot	stable
pw_symbolizer	stable
pw_trace	stable
pw_web	stable

Async & concurrency#

Cooperative multitasking, futures, and asynchronous primitives

Learn more: Async & concurrency

Name	Status	Description	Languages
pw_async2	stable	Cooperative async tasks for embedded	C++
pw_atomic	experimental	Software implementations of atomic operations	C, C++
pw_work_queue	stable
pw_async	deprecated	Portable APIs for asynchronous code	C++

Encoding & serialization#

Protocol Buffers, JSON, Varint, Base64, and wire format serialization

Learn more: Encoding & serialization

Name	Status	Description	Languages
pw_protobuf	stable	Expressive interface for encoding and decoding protocol buffers	C++
pw_base64	stable	Base64 encoding, decoding, and validating	C, C++, Rust
pw_bytes	stable	Utilities for manipulating binary data	C++, Rust
pw_checksum	stable	Checksum calculation API	C, C++
pw_flatbuffers	experimental
pw_json	stable	Simple, efficient C++ JSON serialization	C++
pw_protobuf_compiler	stable
pw_uuid	experimental	128-bit universally unique identifier (UUID)
pw_varint	stable	Functions for encoding and decoding variable length integers	C, C++, Rust

OS abstraction layers#

Synchronization, threading, and portable RTOS abstractions

Learn more: OS abstraction layers

Name	Status	Description	Languages
pw_sync	stable	Portable abstraction for synchronization primitives
pw_thread	stable	Thread creation and execution	C, C++, Rust
pw_chrono	stable	Portable std::chrono for constrained embedded devices	C, C++
pw_interrupt	unstable	Interrupt handling utilities for embedded systems
pw_boot	stable	Simplified booting for C++ targets	C++
pw_system	unstable

Backends#

Operating system, RTOS, and bare-metal backends for Pigweed’s OS abstraction layers

Learn more: Backends

Zephyr#

Modules, backends, and helpers for the Zephyr RTOS

Learn more: Zephyr

Name	Status	Description	Languages
pw_allocator_zephyr	stable
pw_assert_zephyr	stable
pw_chrono_zephyr	stable
pw_digital_io_zephyr	experimental		C++
pw_env_setup_zephyr	experimental	Zephyr utilities
pw_i2c_zephyr	experimental	Zephyr implementation for pw_i2c
pw_interrupt_zephyr	unstable
pw_log_zephyr	stable
pw_spi_zephyr	stable
pw_sync_zephyr	stable
pw_sys_io_zephyr	stable
pw_thread_zephyr	stable

Amazon FreeRTOS#

Safe, non-overflowing OS abstractions & wrappers for FreeRTOS

Learn more: Amazon FreeRTOS

Name	Status	Description	Languages
pw_chrono_freertos	stable
pw_interrupt_freertos	experimental
pw_malloc_freertos	stable
pw_sync_freertos	stable
pw_thread_freertos	stable

Eclipse ThreadX#

Thread-safe OS abstraction layers & backends for Azure RTOS ThreadX

Learn more: Eclipse ThreadX

Name	Status	Description	Languages
pw_chrono_threadx	stable
pw_sync_threadx	stable
pw_thread_threadx	stable

Segger embOS#

RTOS abstraction layers & thread-safety integrations for SEGGER embOS

Learn more: Segger embOS

Name	Status	Description	Languages
pw_chrono_embos	stable
pw_sync_embos	stable
pw_thread_embos	stable

STL#

C++ Standard Template Library backends for host and POSIX targets

Learn more: STL (Linux, MacOS, Windows, Fuchsia)

Name	Status	Description	Languages
pw_chrono_stl	stable
pw_sync_stl	stable
pw_thread_stl	stable

Bare metal#

Backends for running directly on target hardware without an OS or scheduler

Learn more: Bare metal

Name	Status	Description	Languages
pw_sync_baremetal	stable

Android#

Utilities and toolchains for using Pigweed on Android

Learn more: Android

Name	Status	Description	Languages
pw_android_toolchain	unstable	GN toolchains for the Android NDK	GN
pw_build_android	stable	Utilities for using Pigweed in Android platform	C++
pw_chre	experimental	Android Context Hub Runtime Environment backend	C++
pw_log_android	stable	Android logging backend	C++

Fuchsia#

Backends and platform integrations for Fuchsia OS

Learn more: Fuchsia

Name	Status	Description	Languages
pw_assert_fuchsia	experimental	pw_assert backend for Fuchsia	C, C++
pw_async_fuchsia	experimental	Fuchsia backend for pw_async	C, C++
pw_log_fuchsia	experimental	Fuchsia logging backend	C, C++
pw_random_fuchsia	experimental	Fuchsia implementation of pw_random

Kernel#

Embedded kernels, preemptive scheduling, and userspace isolation

Learn more: Kernel

Name	Status	Description	Languages
pw_kernel	experimental	A Rust-based kernel for embedded systems	Rust

Memory & storage#

Memory allocators, buffers, persistent flash storage, and key-value stores

Learn more: Memory & storage

Name	Status	Description	Languages
pw_allocator	stable	Flexible, safe, and measurable memory allocation	C++
pw_buf	unstable	Contiguous buffer views with optional memory ownership	C++
pw_kvs	stable	Lightweight, persistent key-value store	C++
pw_alignment	stable	Natural object alignment, guaranteed	C++
pw_blob_store	stable	Flash-backed persistent storage for data blobs	C++
pw_file	unstable
pw_intrusive_ptr	unstable
pw_malloc	stable	Replacement interface for standard libc dynamic memory operations	C, C++
pw_memory	stable	Memory utilities	C++
pw_multibuf	unstable	A buffer API optimized for zero-copy messaging	C++
pw_ring_buffer	stable

HALs#

Hardware abstraction layer interfaces for timers, I2C, SPI, UART, and GPIO

Learn more: HALs

Name	Status	Description	Languages
pw_analog	stable	Analog-to-digital converter libraries and utilities	C++
pw_clock_tree	unstable	Clock tree management for embedded devices	C++
pw_digital_io	stable	Digital I/O interface	C++
pw_display	experimental	Graphic display support and framebuffer management
pw_hal	experimental
pw_i2c	stable	Cross-platform I2C API with interactive debugging	C++
pw_sensor	experimental	A modular way to see the world	Python, C++
pw_spi	stable
pw_sys_io	stable
pw_time	experimental	Robust time, instants, and durations for multiple clock domains	Rust
pw_uart	unstable	Core interfaces for UART communication	C++

Hardware support#

Board support, hardware drivers, and SDK integrations for target platforms

Learn more: Hardware support

Raspberry Pi RP2XXX#

Hardware drivers & platform support for Raspberry Pi RP2040 & Pico SDK

Learn more: Raspberry Pi RP2040 and RP2350

Name	Status	Description	Languages
pw_chrono_rp2040	stable
pw_digital_io_rp2040	stable
pw_i2c_rp2040	stable	Raspberry Pi Pico SDK implementation for pw_i2c	C++
pw_spi_rp2040	unstable	Raspberry Pi RP2040 backend for pw_spi	C++
pw_sys_io_rp2040	stable

NXP#

Drivers, build utilities, & HAL implementations for NXP MCUXpresso SDK

Learn more: mimxrt595-evk

Name	Status	Description	Languages
pw_build_mcuxpresso	stable	Utilities for building NXP MCUXpresso SDK targets	Bazel, GN
pw_clock_tree_mcuxpresso	unstable	NXP MCUXpresso SDK implementation for pw_clock_tree	C++
pw_digital_io_mcuxpresso	stable	Digital I/O for NXP MCUXpresso	C++
pw_dma_mcuxpresso	unstable	DMA helpers for MCUXpresso SDK	C++
pw_i2c_mcuxpresso	stable	NXP MCUXpresso SDK implementation for pw_i2c	C++
pw_spi_mcuxpresso	stable
pw_stream_uart_mcuxpresso	stable
pw_sys_io_mcuxpresso	stable
pw_uart_mcuxpresso	unstable	NXP MCUXpresso SDK implementation for pw_uart	C++

Ambiq#

Hardware drivers & platform support for Ambiq Apollo4 & AmbiqSuite SDK

Learn more: Ambiq Apollo4

Name	Status	Description	Languages
pw_sys_io_ambiq_sdk	stable

Arduino#

Build utilities, cores, & hardware support for Arduino

Learn more: Arduino

Name	Status	Description	Languages
pw_arduino_build	stable	Main function wrapper and build utilities for Arduino	C++, GN
pw_sys_io_arduino	stable

Emcraft#

Hardware support & HAL integrations for Emcraft SmartFusion2

Learn more: Emcraft SmartFusion2

Name	Status	Description	Languages
pw_sys_io_emcraft_sf2	stable

STMicroelectronics STM32FXXX#

Build support & hardware drivers for STMicroelectronics STM32Cube

Learn more: stm32f429i-disc1

Name	Status	Description	Languages
pw_stm32cube_build	stable
pw_sys_io_baremetal_stm32f429	stable
pw_sys_io_stm32cube	stable

Texas Instruments#

Hardware & emulation support for Texas Instruments microcontrollers

Learn more: lm3s6965evb-qemu

Name	Status	Description	Languages
pw_sys_io_baremetal_lm3s6965evb	stable

Data structures & utilities#

Embedded-safe collections, spans, strings, status, and error handling

Learn more: Data structures & utilities

Name	Status	Description	Languages
pw_status	stable	Exception-free error propagation for embedded	C++, C, Python, Java, TypeScript, Rust
pw_result	stable	Error propagation primitives: value-or-error	C++
pw_containers	stable	Generic collections of objects for embedded devices	C++
pw_function	stable	Embedded-friendly std::function	C++
pw_enum	unstable	Rich enum support	C++
pw_numeric	stable	Efficient mathematical utilities for embedded	C++
pw_span	stable	std::span for C++17	C++
pw_string	stable	Efficient, easy, and safe string manipulation	C++

Testing#

Unit testing frameworks, mocking, compilation tests, and fuzzing

Learn more: Testing

Name	Status	Description	Languages
pw_unit_test	stable	GoogleTest for embedded
pw_compilation_testing	stable
pw_fuzzer	unstable	Better C++ code through easier fuzzing	C++
pw_hil	experimental
pw_perf_test	unstable	Micro-benchmarks that are easy to write and run	C++
pw_target_runner	stable	gRPC server for running executables in parallel	Go

Build systems#

Bazel, GN, and CMake integrations and rules

Learn more: Build systems

Name	Status	Description	Languages
pw_build	stable	Integrations for Bazel, GN, and CMake	Bazel, CMake, GN, Rust
pw_build_info	stable	Generate, embed, and parse build-related information	Bazel, CMake, GN
pw_rust	experimental

Toolchains#

Hermetic LLVM/Clang toolchains, C/C++ libraries, and build utilities

Learn more: Toolchains

Name	Status	Description	Languages
pw_bloat	stable	Utilities for generating binary size reports	C++, GN
pw_elf	experimental	ELF file support	C++
pw_libc	unstable
pw_libcxx	unstable
pw_polyfill	stable
pw_preprocessor	stable	Helpful preprocessor macros	C, C++
pw_toolchain	stable	Embedded toolchains for GN-based Pigweed projects	GN

Developer tools#

Interactive REPL, CLI utilities, code intelligence, and emulators

Learn more: Developer tools

Name	Status	Description	Languages
pw_ide	stable	Code editor and IDE support for Pigweed projects	C++, CLI, Python, VS Code
pw_env_setup	stable
pw_module	stable
pw_presubmit	stable	Python tools for running presubmit checks and linters	Python
pw_watch	stable	Embedded development file system watcher
Docker	experimental	Docker images for caching Pigweed environments
pw_change	experimental	Commands that operate on Gerrit changes and Git commits	Python
pw_cli	stable	Enhance and accelerate custom command-line tooling	Python
pw_config_loader	stable
pw_docgen	stable	Documentation generator for Pigweed-based projects	GN
pw_doctor	stable
pw_emu	experimental	Flexible emulators frontend	Python, CLI
pw_ghish	experimental	GitHub CLI-like interface for Gerrit code reviews and CI checks	Go
pw_package	stable

Cryptography & security#

Hashing, cryptographic primitives, and secure storage

Learn more: Cryptography & security

Name	Status	Description	Languages
pw_crypto	stable
pw_fortifier	experimental	Tools and frameworks for defensive development	Python
pw_random	stable
pw_software_update	experimental	Secure software delivery	Python, C++
pw_tls_client	stable