IoT application that detects humidity, temperature, and motion using various sensors such as the PIR (Passive Infrared) motion sensor, sound sensor, and DHT11 sensor. Additionally, you mentioned the use of Node-RED, Railways.app, and MQTT for developing and integrating this application.
Here's an explanation of the components and technologies involved:
PIR motion sensor: This sensor detects changes in motion within its environment. It is used to detect motion presence in a specific area.
Sound sensor: This sensor measures ambient sound levels. It can be used to detect specific sound events or monitor surrounding noise levels.
DHT11 sensor: It is a combined humidity and temperature sensor. It allows measuring both relative humidity and temperature in the environment.
Node-RED: It is a visual development platform for creating IoT applications. Node-RED provides a graphical interface to connect and manage data flows between different IoT devices and services.
Railways.app: It is a Node-RED-based application specifically designed to facilitate the deployment and management of Node-RED applications in the cloud. It offers additional features to ease the deployment and configuration of Node-RED applications.
MQTT: MQTT (Message Queuing Telemetry Transport) is a lightweight communication protocol used for message exchange between IoT devices. It is commonly used for data collection and transmission between sensors and IoT applications.
Using Node-RED, you can connect these sensors to your application, configure them to collect humidity, temperature, and motion data, and send it via MQTT protocol to a server or other IoT devices for data processing and analysis. Railways.app can be used to facilitate the deployment and management of your Node-RED application in the cloud.
In summary, the described application utilizes humidity, temperature, and motion sensors, along with technologies like Node-RED, Railways.app, and MQTT, to collect, process, and transmit IoT data.