Node-RED is a powerful tool for developing IoT applications. It provides an easy-to-use graphical interface for wiring together hardware devices, APIs, and online services in order to create complex automations.
For example, a Node-RED application can be used to control an IoT device such as a smart thermostat. The application could be configured to monitor the temperature in a room and adjust the thermostat settings accordingly. It could also be configured to send notifications when the temperature reaches a certain level.
Node-RED can also be used to create applications that connect to a range of online services. For example, an application could be created to monitor Twitter for certain keywords and send notifications when they are mentioned.
Finally, Node-RED can be used to create complex applications that combine hardware, APIs, and online services. For example, an application could be created to monitor the temperature in a room and activate a fan when it reaches a certain level. It could also be configured to send a notification to a mobile device when the temperature reaches a certain level.