IoT systems span a broad range of physical connections, communication protocols, interaction models, and platforms, each serving different needs and constraints. Rather than avoiding this diversity, the real opportunity lies in building applications that can operate across it and turn it into scalable value. In this workshop, you will discover how Zenoh supports communication across heterogeneous IoT environments and how the Web of Things (WoT) enables platforms to integrate with Zenoh in an interoperable way. After a short introduction to the fundamentals, we will move into a hands-on demo session where you will gain practical experience with these open-source technologies and learn how to apply them in your own projects.