"Pradeeka Seneviratne is a software engineer with over 10 years of experience in computer programming and systems designing. He is an expert in the development of Arduino and Raspberry Pi-based embedded systems. Pradeeka is currently a full-time embedded software engineer who works with embedded systems and highly scalable technologies. Previously, he worked as a software engineer for several IT infrastructure and technology servicing companies. He collaborated with the Outernet (Free data from space, forever) project as a volunteer hardware and software tester for Lighthouse, and Raspberry Pi-based DIY Outernet receivers based on Ku band satellite frequencies. He is also the author of three books: 1. Internet of Things with Arduino Blueprints [Packt Publishing] 2. IoT: Building Arduino-based Projects [Packt Publishing] 3. Building Arduino PLCs [Apress] John Sirach works as a Product Owner at Greenhouse Innovation. He has more than 10 years of experience with Internet-related disciplines from connectivity to hosting and Internet Of Things. Currently, he is involved in the open source ""PiDome Home Automation platform"" project as a passionate Java and JavaFX software developer and project maintainer. In the past 10 years, he has gained experience with large-scale web applications committed to online services with the most experience gained in frontend web development and application middleware."