Six Connection Scenarios of Web of Things (WoT) Illustrated with an Automatic Dog‑Feeding Device

IoT (Internet of Things) has become one of the most promising technological fields, and Web of Things (WoT) offers a universal language that enables interoperable smart devices from different manufacturers.

The article introduces WoT through a playful story about an IT professional who builds an automatic dog‑feeding device, using it to demonstrate six concrete WoT connection scenarios.

Scenario 1 – Web‑service control: The feeding device hosts a web server accessible via the Internet; users can send commands from browsers or native apps to trigger feeding.

Scenario 2 – Local‑network control: When Internet connectivity fails, the same device can be controlled over a local LAN, allowing remote feeding within the home network.

Scenario 3 – Bluetooth remote control: By adding a Bluetooth module and a paired remote, the device can be operated without line‑of‑sight, overcoming the limitations of infrared remotes.

Scenario 4 – Sensor‑based control: A water‑level sensor detects an empty bowl and signals a control agent to refill the water tank automatically.

Scenario 5 – Gateway mediation: For devices that cannot connect directly to the Internet, a gateway bridges the local network and cloud, enabling status reporting and remote commands.

Scenario 6 – Cloud‑managed devices: Each device mirrors its state in the cloud; commands are stored and relayed through the cloud, ensuring reliable operation even after temporary disconnections.

These six scenarios can coexist, as illustrated by the combined diagram showing multiple connection paths operating together.

The article concludes by noting that all six scenarios can operate simultaneously, providing a comprehensive view of how WoT can be applied in real‑world smart‑device ecosystems.