Written by Loong
on August 25, 2019

GSoC 2019 Coding Period Week 13

I made a video tutorial Build a Web of Things project using the WoT:API module. This video contains the entire process from enabling the module to lighting the LED. The main demonstration content is as follows:

Download the WoT:API module using composer

 composer require 'drupal/wotapi:1.x-dev' -vvv

Enable all modules of the WOTAPI package.
Add thing type: Lamp
Manage fields » Add field » Thing property：Switch.
- check: Create referenced entities if they don’t already exist.
- check: OnOffProperty
Manage fields » Add field » Thing action: Toggle
Download the sandbox project Action example. This sandbox is not available for download by the composer, so use git clone to download it:
```
git clone https://git.drupalcode.org/sandbox/dravenk-3075952git modules/custom/action_example
```
Download the dependency package for the sandbox project:
```
composer require ronanguilloux/php-gpio -vvv
```
Back to the Toggle field management page of Lamp:

Check default value: toggle
Back to Structure » Things » Thing list » add Thing: LampA » Save
Open {site}/wotapi/things/, You can see the thing output of the json data
Copy the actions href of the links object.

Open the Postman:

   Request method:  POST
   Request URL:  {site}/actions
   Authorization:  Basic Auth
   Content-Type: application/json
   Body:   '{"toggle":{}}'

Enable the basic_auth module
Insert the LED light in the position where the pin value is 17 in the raspberry pi. This blog has more information.
Click Postman Send to send the request.

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