embassy-rs/embassy

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

9739 stars · 1631 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Embassy is a next-generation embedded framework for Rust that uses async/await for cooperative multitasking on microcontrollers without an RTOS or dynamic allocation. It provides an async executor, hardware abstraction layers for STM32, nRF, RP2040/RP235x, and other chip families, plus batteries-included timekeeping and drivers.

Use cases

• write async Rust firmware for a microcontroller
• replace an RTOS with a lightweight async executor on embedded hardware
• blink LEDs and handle GPIO interrupts concurrently on an RP2040 or STM32
• build battery-efficient embedded applications without dynamic memory allocation
• develop firmware for nRF52, ESP32, or Raspberry Pi Pico in Rust
• manage hardware timers and timekeeping in no_std embedded code

When to choose

• you want safe, memory-safe embedded development in Rust with async/await
• you need multitasking on a microcontroller without an RTOS, heap, or per-task stacks
• your target chip is supported by an Embassy HAL (STM32, nRF, RP2040/RP235x, ESP32, etc.)

When to avoid

• your project is written in C/C++ or another language
• you need hard real-time guarantees with deterministic scheduling that cooperative async cannot provide
• your microcontroller family has no Embassy or compatible HAL available

Facets

framework · maturity active

embedded concurrency sdk embedded-systems developer-tools cross-platform embedded rust iot async executor hal no-std rtos-alternative microcontroller rust

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