Embassy is a next-generation embedded framework for Rust that enables asynchronous programming on microcontrollers using async/await syntax. It provides Hardware Abstraction Layers (HALs) for multiple MCU families (STM32, Nordic nRF, Raspberry Pi RP2040/RP23xx, TI MSPM0, NXP MCX-A, etc.), an async executor for cooperative multitasking, timekeeping utilities, networking stack, USB device/host stack, Bluetooth support, bootloader/DFU capabilities, cryptographic primitives, and synchronization primitives. The framework emphasizes safety, correctness, and energy efficiency through Rust's compile-time guarantees, with an executor that automatically enters low-power sleep when idle. Applications are structured around peripheral initialization, async task spawning via #[embassy_executor::task], and event-driven communication using Embassy's synchronization primitives.