## 3 WebAssembly and IoT
### Practical Applications of WebAssembly in IoT
Wasm enhances the security of IIoT systems by providing a sandboxed execution environment that isolates code execution and prevents unauthorized access or tampering. This helps in safeguarding industrial processes, ensuring data integrity, and mitigating potential cybersecurity threats. * **Legacy System Integration** Many industrial facilities rely on legacy systems and equipment that may not natively support modern technologies. Wasm enables the integration of legacy systems by providing a bridge between old and new technologies. By compiling legacy code into Wasm modules, industrial organizations can leverage the benefits of IIoT without the need for a complete system overhaul. * **Remote Monitoring and Control** IIoT systems often involve remote monitoring and control of industrial processes. Wasm enables the development of lightweight and efficient web-based user interfaces that can be accessed from anywhere using standard web browsers. This allows remote operators and engineers to monitor real-time data, control industrial equipment, and make informed decisions remotely, improving operational efficiency and reducing downtime. * **Offline Operation and Fault Tolerance** Industrial environments may experience network disruptions or operate in remote areas with limited connectivity. Wasm enables IIoT systems to operate offline or with intermittent connectivity by executing code locally on edge devices. This ensures uninterrupted operation, data logging, and fault tolerance even in challenging network conditions. * **Customization and Modularity** Wasm's modular architecture enables the creation of customized IIoT applications by combining pre-built modules and components. This promotes code reusability, accelerates development cycles, and allows for the creation of tailored solutions that address specific industrial requirements. It facilitates easy maintenance and updates by enabling modular replacement or addition of functionality. * **Wearable Devices** Wearable devices have gained significant popularity in recent years, offering various functionalities and improving the way we monitor and interact with our health, fitness, and daily activities. With the emergence of Wasm, these wearable devices can benefit from its practical applications in the IoT ecosystem. There are a number of ways in which Wasm can be applied in the context of wearable devices: * **Enhanced Performance** Wasm enables wearable devices to efficiently execute computationally intensive tasks. By leveraging near-native performance, Wasm can handle complex algorithms and data processing tasks, providing a seamless user experiences without compromising battery life or device performance. This allows wearable devices to perform tasks such as real-time health monitoring, fitness tracking, and advanced data analysis without significant lag or slowdown. * **Cross-platform Compatibility** Wasm's platform-independent nature makes it an ideal technology for developing wearable applications that can run across different operating systems and hardware platforms. This cross-platform compatibility ensures that wearable devices can offer consistent functionality and user experiences regardless of the device or operating system being used. Developers can write code once and deploy it on multiple wearable platforms, saving time and effort in application development. * **Offline Functionality** Wearable devices often operate in situations where internet connectivity may be limited or unreliable. Wasm enables offline functionality by allowing key application components to run locally on the wearable device. This ensures that critical functionalities such as heart rate monitoring or step counting can continue even when the device is not connected to the internet or a smartphone. Offline functionality enhances the usability and reliability of wearable devices in various scenarios. * **Customizable User Interfaces** Wasm empowers developers to create customized user interfaces for wearable devices.