The subject of the thesis was to develop test applications using WebAssembly Micro Runtime and to study this runtime and its features. WebAssembly Micro Runtime is a WebAssembly virtual machine developed for microcontrollers. The client for this project was Polar Electro Oy. The goal was to implement test applications that could test the suitability of the WebAssembly Micro Runtime in testing the customer's devices.

The source code of the work's test application and the programming of the necessary interfaces were implemented in the C programming language. The implementation of the work included the design and programming of test applications. In addition to this, the work included the study of WebAssembly and WebAssembly Micro Runtime.

The result of the thesis was the development of test applications for the accelerometer and BLE (Bluetooth Low Energy). In addition to the result of the work, a lot of useful information about the WebAssembly Micro Runtime and its features was collected.