Node-RED: Lecture 6 – Example 6.6 Getting earthquake data from an external API

Example 6.6 Getting earthquake data from an external API and returning it as multiple messages

This example demonstrates how to get data from an external API and how to separate that data using a function node. We will use data from an external API that provides access to earthquake data which is made available by the US geological survey (USGS).… Read the rest

Node-RED: Lecture 3 – Example 3.1: Receiving JSON via an MQTT message

This example builds on the mqtt node, which provides a convenient way to take input from an MQTT broker. For those not familiar with MQTT, it is an example of a publish/subscribe system (usually shortened to pub/sub system) which lets sensors publish updates that all delivered to client subscribed to that sensor.… Read the rest