Hands-On Industrial Internet of Things

Sending data through MQTT

Let's get the MQTT client from the official GCP GitHub repository. In this simple example, we are going to use Node.js:

1. First, we need to clone the Node.js client from the official repository. From the root path where we have stored our certificate, enter the following command:

$ mkdir my-iiot-device$ cd my-iiot-device$ git clone https://github.com/GoogleCloudPlatform/nodejs-docs-samples$ cd nodejs-docs-samples/iot/mqtt_example/$ npm install

2. We can then start publishing. The following code sends an MQTTS payload to the IoT core that was just configured on europe-west1, identifying itself as my-iiot-device:

$ node cloudiot_mqtt_example_nodejs.js \    --projectId=iiot-book \    --cloudRegion=europe-west1 \ --registryId=iiot-book-registry ...