Node-RED is an open-source programming tool used to create and wire together “flows” of information in the Internet of Things (IoT). It is a visual programming tool that enables developers to quickly create applications by connecting nodes (blocks of code) together. Node-RED can be used to connect devices, applications, and services together to create powerful IoT applications.
For example, Node-RED can be used to connect a temperature sensor to a web service, which can then be used to trigger an alarm or send an alert when the temperature reaches a certain level. Node-RED can also be used to create a dashboard to monitor the temperature in real-time. This dashboard can be accessed from anywhere with an internet connection.