## 1. Overview

Here you have the opportunity to get to know the open-source software Node-RED to network some sensors and actuators. Node-RED runs in your dollhouse on a single-board computer named Raspberry Pi, but could also be operated on a PC or in the cloud.

After Node-RED is started on the Raspberry Pi, a web server on the single-board computer is accessible. The web server provides a graphical programming interface, which can be opened with a web browser.

### Learning objectives

You will lern with the article Exploring IoT Applications with Node-RED …

- describe what Node-RED can be used for.
- create your own dashboards on your smartphone.
- use the MQTT protocol.
- describe some possibilities of IoT.
- explain the message flow in NodeRED.