Web of Things Simulator

Project Description

The Web of Things (WoT) Simulator is a simulator that allows you to emulate connected devices in the context of the Internet of Things (IoT) using the Web of Things model. The project enables you to insert different types of Thing into a specific environment and monitor and interact with their properties and actions.

Currently, the program includes two example SituatedThing types: LampThing and Radiator, along with a HeatingEnv as the environment.

Example Things:

• LampThing
  A lamp that can be turned on or off using the 'toggle' function. When on, the intensity of the light increases periodically.

• Radiator
  A radiator that can be turned on or off using the 'toggle' function. When on, it increases the temperature of the environment it is placed in.

• HeatingEnv
  An environment that can be heated using the increaseTemperature(energy) function.

In the project, the configuration file ./src/td/config.json contains an example of a HeatingEnv with 2 LampThing (with different periods) and 2 Radiator (with different powers).

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How to Use

1. Configure the Paths

Before running the simulation, you need to configure the paths to the configuration file, SituatedThing models, and Environment models:

• CONFIG: Path to the configuration file (config.json).
• THING_MODEL: Path to the folder containing SituatedThing models.
• ENV_MODEL: Path to the folder containing Environment models.

Modify the variables to reflect the correct paths in your environment.

2. Add New SituatedThing or Environment

You can add new SituatedThing or new Environment.

3. Configure the config.json File

The config.json configuration file has 3 main sections:

• "servients": Contains the configuration for the servients required for the simulation. Each servient must include the following keys:

  • 'id': Unique identifier of the servient.
  • 'type': The protocol type used by the servient (e.g., http, mqtt).

• "environment": Configures the environment. The section should include:

  • 'servients: idServient': Specifies the servient that exposes the environment.
  • 'type', 'id', and 'title': Other details related to the environment.

• "things": Contains an array of configurations for the Things you want to include in the environment. Each Thing must have:

  • 'servients: idServient': Specifies the servient that exposes this Thing.
  • 'type', 'id', and 'title': Details of the Thing.

Modify the configuration file as needed to customize the simulation.

4. Run the Simulation

To run the simulation, start the program from the main file (main.ts) using the following command:

npx ts-node src/main.ts

Interacting with the Simulation

A. Making GET Requests

GET requests allow you to retrieve the values of properties from Things and Environment. Example requests:

1. Get the temperature of the environment:

   GET 'localhost:8081/heatingenv/properties/temperature'

2. Get the power of the first radiator:

   GET 'localhost:8081/radiator1/properties/power'

3. Get the intensity of the first lamp:

   GET 'localhost:8081/smartlamp1/properties/intensitye'

B. Making POST Requests

POST requests allow you to interact with the Things, such as turning them on or off.

1. Turn the first lamp on or off:

   POST 'localhost:8081/smartlamp1/actions/toggle'

2. Turn the first radiator on or off:

   POST 'localhost:8081/radiator1/actions/toggle