Embassy

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Embassy is an open-source framework for embedded applications, leveraging Rust and async programming to write safe, correct, and energy-efficient embedded code. It provides hardware abstraction layers and networking capabilities.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is embassy?

Embassy is a modern, open-source framework designed for embedded applications, utilizing the Rust programming language and its asynchronous facilities. It enables developers to write safe, correct, and energy-efficient embedded code more rapidly. The framework includes Hardware Abstraction Layers (HALs) for various microcontrollers like STM32, nRF, RP2040, and MSPM0, simplifying hardware interaction. Key features include globally available timekeeping, real-time task management with priority-based execution, and low-power readiness by putting the core to sleep when idle. Embassy also offers a comprehensive networking stack, Bluetooth Low Energy support, LoRa integration, a device-side USB stack, and a robust bootloader for power-fail-safe firmware upgrades.

Best used for

Ideal for developers who need to build high-performance, energy-efficient embedded systems, implement complex networking functionalities, and manage concurrent tasks without a traditional RTOS. Especially valuable for projects requiring robust firmware updates and precise hardware control using Rust's safety features.

Common actions

develop embedded systems

write Rust embedded code

manage hardware interactions

implement networking protocols

create low-power devices

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Capabilities

Key features

Rust async embedded framework
Hardware Abstraction Layers (HALs)
Global timekeeping
Real-time task management
Low-power readiness
Networking stack
Bluetooth Low Energy support

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What microcontrollers does Embassy support?

Embassy provides Hardware Abstraction Layers (HALs) for a range of microcontrollers including STM32, Nordic Semiconductor nRF52/nRF53/nRF54/nRF91 series, Raspberry Pi RP2040/RP23xx, Texas Instruments MSPM0, and NXP MCX-A series. It also supports Espressif ESP32 and WCH CH32V chips through external HALs.

How does Embassy handle multitasking in embedded systems?

Embassy uses Rust's async/await feature to transform tasks into state machines at compile time, which run cooperatively on a single stack. This approach eliminates the need for dynamic memory allocation and per-task stack size tuning, offering a more efficient alternative to traditional RTOS context switching.

Does Embassy support networking and wireless communication?

Yes, Embassy includes a comprehensive `embassy-net` network stack with support for Ethernet, IP, TCP, UDP, ICMP, and DHCP. It also offers Bluetooth Low Energy (BLE) support via `trouble`, `nrf-softdevice`, and `embassy-stm32-wpan` crates, and integrates with the `lora-rs` project for LoRa/LoRaWAN.

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