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# Tutorials | ||
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1. [Consume and visualize device data with information models](tutorial-create_webapp_with_vorto.md) |
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# Consume and visualize device data from an Information Model | ||
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## Prerequisites: | ||
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You have successfully installed the [Vorto Eclipse Plugins](https://marketplace.eclipse.org/content/vorto-toolset) from Eclipse Marketplace. | ||
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## Overview | ||
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In this tutorial, you are going to show you, how easy you can create a small web application that is able to receive sensor data from MQTT and visualize it in a simple HTML page. | ||
All we need to do, is to describe the sensors with Vorto and use existing generators that convert the descriptions into multiple system components. | ||
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- MQTT consumer that receives the device data and deserializes it into a device specific object model | ||
- Web Application Front-end that pushes the device data via Web Sockets to the browser and displays it in a HTML page. | ||
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![System Architecture](images/vorto_tutorial_architecture.jpg) | ||
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The webapplication that is going to communicate with mqtt client will appear as shown below: | ||
![Web UIIntro](images/tut_tisensorwebui.jpg) | ||
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### Let's begin! | ||
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## Step 1: Implement MQTT client for functionblocks ## | ||
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1. From eclipse, switch to Vorto perspective. | ||
2. Select Model Repository tab, Search for the info model **TI_Sensor** | ||
3. _TI_SensorTag_ info model gets listed in the search result. | ||
4. Drag and drop this infomodel into the infomodel frame | ||
![Search Infomodel](images/tut_searchdraginfomodel.jpg) | ||
5. Select the info model -> Right-click -> Generate Code -> _choose_ MQTT Generator | ||
![Generate MQTT](images/tut_generatemqtt.jpg) | ||
6. Switch back to java perspective. The generated project will not compile, since it requires some Java model classes for the device. | ||
7. Switch back to the Vorto Repository and Generate also the _Javabeans_ for the TI SensorTag | ||
8. Update mqtt and javabeans project. The MQTT Client project should fully compile now. | ||
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![mqttTick](images/tut_tickmark.jpg) Congratulations! You have just generated a MQTT client for the functionblocks, offered as functionality by the TI SensorTag. | ||
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## Step 2: Implement a Web Application for the information model ## | ||
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In this exercise we are making our IoT app a little more sophisticated and display the MQTT sensor data in web UI Elements. | ||
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1. Switch to the Vorto Perspective and find the TI SensorTag information model. | ||
2. Right-click and choose _Web UI Generator_ from the list of Generators | ||
3. Switch back to the Java Perspective. You should see another Eclipse Project added by the Web UI Generator (_webdevice.example_) | ||
4. Convert this Project to an Eclipse Project as well. The Web application is a Spring Boot application and already fully runnable.Run the application. | ||
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![SpringBoot app](images/tut_springbootrun.jpg) | ||
5. Open your browser under [http://localhost:8080/webdevice] | ||
6. In the web application, switch to the Accelerometer tab. You will see status fields that have been generated from the Accelerometer functionblock. | ||
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![Web UI](images/tut_tisensorwebui.jpg) | ||
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![Tick](images/tut_tickmark.jpg) Congratulations! You just implemented a small AngularJS web application with the help of Vorto. However the Accelerometer UI fields are not yet populated with the sensor data. Let's do that in the next exercise. | ||
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## Step 3: Sign up for a PubNub account ## | ||
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1. You’ll need to [sign up for a PubNub account](https://www.pubnub.com/get-started/#).Once you sign up, you can get your unique PubNub keys in the [PubNub Developer Portal](https://admin.pubnub.com/#/user). You will use those same keys when you want to leverage our MQTT gateway. | ||
2. Take note of the Publish and Subscribe keys generated under Demo Keyset screen of PubNub. | ||
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## Step 4: Receive MQTT status events and bind it to the Web UI Elements ## | ||
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In this exercise we are going to glue the Web application together with the MQTT client, that Vorto had so nicely generated for us. | ||
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1. In the pom.xml of the web application, add a dependency to the generated MQTT client | ||
![dependency](images/tut_mqttdependency.jpg) | ||
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2. Go to the Spring Boot Application class and import the MQTT configuration for the Accelerometer (_@Import (MqttConfigurationAccelerometer.class_)). | ||
3. Find the commented code that handles the incoming MQTT events and un-comment it. | ||
4. Remove the annotation _@EnableScheduling_ | ||
![Springbootclass](images/tut_springbootclass.jpg) | ||
5. Edit **MqttConfigurationAccelerometer.java** by adding the following lines to **inboundAccelerometer** method | ||
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MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter(this.connectionUrl, "pub-c-xxxx/sub-c-xxxx/clientAccelerometer_00c740db-9245-4e5a-8c80-8a50908ee69f"); | ||
adapter.addTopic(this.topicName); | ||
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6. The MQTT configuration of the Accelerometer requires the MQTT topic and connection url in order to receive status events properly. Therefore we must add the following configuration to the **application.yml** file | ||
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server: | ||
port: 8080 | ||
contextPath: /webdevice | ||
publish_key : "pub-c-xxxx" | ||
subscribe_key : "sub-c-xxxx" | ||
mqtt: | ||
connectionUrl: tcp://mqtt.pubnub.com | ||
topic: | ||
accelerometer: pub-c-xxxx/sub-c-xxxx/accelerometerTopic | ||
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7. Add MQTTlens extension to chrome browser. | ||
8. Create a new connection in MQTTlens by adding the following details in respective fields: | ||
- Connection name : pubnub | ||
- Hostname : mqtt.pbnub.com | ||
- Client ID: pub-c-xxxx/sub-c-xxxx/123 | ||
9. Enter the following as **Subscribe** Topic | ||
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pub-c-xxxx/sub-c-xxxx/accelerometerTopic | ||
10. Enter the following as **Publish** Topic | ||
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pub-c-xxxx/sub-c-xxxx/accelerometerTopic | ||
11. Click on **Subscribe**. | ||
12. Enter the following message | ||
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{"currentAcceleration": {"speed":"44.4"}} | ||
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13. Click on **Publish** | ||
14. Switch back to Web UI (http://localhost:8080/webdevice/#/accelerometer) | ||
15. The Speed field is updated with the value **44.4** | ||
![Speedfield](images/tut_pubnubtowebui.jpg) |