Node-RED: What are Node-RED nodes
This documentation is part of the Introduction guide. View the full guide here: Introduction to Node-RED, all you need to know about it.
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Stackhero offers a ready-to-use Node-RED cloud solution that provides a host of benefits, including:
- MQTT server included (Mosquitto).
- Full access to Node-RED admin UI.
- Node-RED Dashboard included.
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- Effortless updates with just a click.
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In Node-RED, a "node" refers to a block that can receive, transform, and transmit data.
This data can flow between nodes, external APIs (such as Google, Stripe, Twitter, etc.), databases (like MySQL, MongoDB, Elasticsearch, OpenSearch, etc.), or other systems (including MQTT, email servers, object storage, and more).
Nodes are interconnected using wires, visually arranged within the browser interface.
Node-RED includes approximately 40 pre-installed nodes. Some are basic, like Switch conditions. Others facilitate external connections, like HTTP, MQTT, or Email nodes. Some nodes, such as Function and Template, can encompass complex code or be used to craft advanced text documents or HTML pages.
With the Node-RED "palette," you have the option to add external nodes crafted by global companies or users. Nearly 4,000 external nodes are available, all free of charge!
Node-RED nodes example