In this demonstration, we present a WebAssembly-based programming and debugging environment for developing IoT applications. The goal of the WARDuino project is to make it easier to write IoT programs for microcontrollers in a wide verity of programming language. The demo is aimed at anyone interested in developing IoT applications, whether they are novices or experts.

WARDuino is a WebAssembly virtual machine for microcontrollers that allows developers to write programs for embedded systems in any programming language supported by WebAssembly. To further ease the development of microcontroller applications, the virtual machine also supports remote debugging. We have developed a VS Code plugin to remotely debug Rust programs running on top of WARDuino. We will demonstrate the benefits of our approach by writing a simple Rust program for microcontrollers in VS Code and remotely debugging it. The WARDuino virtual machine also features microcontroller specific functions, which enable developers to control the specific hardware of embedded systems. We will illustrate this at the end of our presentation, by showing a breakout game implemented with WARDuino.