Simple Node.js Express 4 Cassandra Application

Datastax Academy: What is Cassandra?

Introduction to what Cassandra is, where it came from, and some of it's benefits

Kaa application based on Raspberry Pi and DHT11 sensor

This project demonstrates an Internet of Things (IoT) use case where a Raspberry Pi device equipped with a DHT11 sensor collects temperature and humidity measurements. The data is uploaded and stored in Apache Cassandra using the Kaa IoT middleware platform, showcasing a complete edge-to-cloud data pipeline. ## Key Features - **Sensor Data Collection** — Reads temperature and humidity measurements from a DHT11 sensor connected to a Raspberry Pi. - **Kaa Platform Integration** — Uses the Kaa open-source IoT platform to handle device management and data ingestion. - **Cassandra Storage** — Stores collected sensor data in Apache Cassandra for scalable time-series data persistence. - **Raspberry Pi Deployment** — Provides complete setup and build instructions for running on Raspberry Pi hardware. - **C SDK Implementation** — Implements the client application using Kaa's C SDK for resource-constrained environments. ## Philosophy The project exemplifies practical IoT implementation by combining affordable hardware (Raspberry Pi, DHT11 sensor) with robust open-source software (Kaa, Cassandra) to create a functional temperature monitoring system.