Enabling Google Cloud on the Intel® Edison Board

This article explains how to establish a connection with Google cloud services using nodeJS* API. While this was written for the Intel® Edison board, it should work on any platform that runs nodeJS. This includes creating a cloud project, store and retrieve data.

Create Google cloud project

Log in to Google cloud portal and click Create Project at the top-left of the page.

Type a name for the project and press the create button

You can see an activity window on the bottom of the page. Once the project is created project overview page shows up.

Select APIs (under APIs & auth) from the left pane.

Search for the required API and click Enable API.

For e.g., Google Cloud Datastore API

Now select Credentials from the left pane, press the Create new Client ID button and select Service account.

After successful creation a private key file (*.json) is downloaded. Save the file which will be used for authentication.

Setting up the development environment

Install Google Cloud Node.js Client

npm install --save gcloud

Copy the downloaded JSON key file to the board.

Create a datastore/db object

"cloud" : {"projectId": "iot-cloud-project","keyFilename": "./key.json"
    }

db = gcloud.datastore.dataset(cloud);

Store Data

Each entity in the storage requires a unique key to store in the database and consists of a namespace and path attributes.

  key = {"namespace": this.namespace,"path": [data[i].sensor_id, data[i].timestamp]
           }
  db.save({
            key: key,
            data: data[i]
        }, function(err) {
            if (!err) {
              //console.log("Test data saved");
            }
    });

Query Data

Timestamp based query

dataQuery = db.createQuery(namespace, readQuery.sensor_id)
  			.filter('timestamp >=', readQuery.timestamp);

Sensorid based query

dataQuery = db.createQuery(namespace, readQuery.sensor_id);

Run query

    db.runQuery(dataQuery, function(err, result) {
      if(err) {
        logger.error(JSON.stringify(err, null, ''));
      } else {
logger.info('Google - Data received: %d', result.length);
});

References

Google Cloud documentation - https://cloud.google.com/docs/

Google Cloud Node.js Client - https://github.com/GoogleCloudPlatform/gcloud-node

Cloud Datastore concepts - https://cloud.google.com/datastore/docs/concepts/overview

Cloud Datastore API - https://googlecloudplatform.github.io/gcloud-node/#/docs/v0.14.0/datastore