Introduction

This beginner-friendly blueprint demonstrates how to use Particle Cloud functions to trigger a "Hello World" publish event. It’s a minimal and reliable way to confirm your device is connected and responding to cloud commands.

Supported devices

Hardware and supplies

• Supported Particle device
• USB cable

Project description:

The firmware registers a cloud function called sayHello. When the function is invoked from the Console or API, the handler publishes an event called hello_world to the Particle Cloud. This event is visible under Logs in the Console and can be consumed by integrations, webhooks, or other devices.

It’s an excellent first step for learning how to build connected projects using Particle’s cloud APIs and real-time device communication.