Enterprise Internet of Things Handbook

Setting up the client

Now that we have provided the required credentials as well as subscribed to a Pub/Sub topic, we will set up the Pub/Sub client. Follow these steps:

1. Create a folder named test_client inside the test_client directory. Now, run the following command:

$ npm init -y

2. Next, install the @google-cloud/pubsub (https://www.npmjs.com/package/@google-cloud/pubsub) module with the help of the following command:

$ npm install @google-cloud/pubsub --save

3. Create a file inside the test_client folder named index.js and update it as shown in this code snippet:

var PubSub = require('@google-cloud/pubsub'); var projectId = 'pi-iot-project'; var stateSubscriber = 'dht11-data' // Instantiates a client var pubsub = new PubSub({ projectId: ...