Web Assembly (WASM) has seen significant success in web applications and is now making inroads into other areas like cloud services and even embedded systems that run Real-time Operating Systems (RTOS), such as Zephyr, RT-Thread, Nuttx, and ESP-IDF.

This lightning talk will present different approaches to using WASM on embedded systems.

- wasmtime (Arm Linux)
- wasm-micro-runtime (RTOS)
- wasm3 (Baremetal)

The above WASM runtimes offer full support for the WASM core specifications. Additionally, their limited support for the WebAssembly System Interface (WASI) enables access to components such as threads, file systems, and network sockets.

Although the WASI specifications that provide access to hardware peripherals such as wasi-i2c, wasi-spi, and wasi-digital-io are still in the early stages of development, the potential advantages in portability, security, and deployment simplicity make WASM a promising choice for embedded systems.