Node-RED is a powerful tool for rapidly developing IoT applications. It provides a graphical interface for wiring together hardware devices, APIs, and online services in order to create IoT applications.
For example, Node-RED can be used to quickly build an application that monitors temperature and humidity from a sensor and sends an alert when the sensor readings exceed a certain threshold. The application can be built by simply dragging and dropping nodes from the Node-RED palette onto a canvas and connecting them together. Nodes are available for a variety of tasks, such as reading data from a sensor, sending an alert, and logging data to a database. Once the application is complete, it can be deployed to a server and run.