The Raspberry Pi is a powerful and relatively inexpensive general-purpose computer that has become popular for IoT projects, particularly edge deployments. To store time-series data from an IoT prototype powered by the Raspberry Pi, developers can use TimescaleDB, a time-series database built on top of PostgreSQL. This tutorial demonstrates how to create an IoT system using a Raspberry Pi, Timescale Cloud, and Grafana to enable time-series data storage, processing, and visualization. The system consists of a "The Edge" device with a photocell light sensor, which sends readings to a hosted TimescaleDB instance via the cloud, and visualizes the data in a Grafana dashboard. By following this tutorial, developers can create their own IoT systems using the Raspberry Pi and Timescale Cloud.