To celebrate PI Day, a team built a weather application on a Raspberry Pi that uses Astra DB and/or Langflow. The goal is to use the National Weather Service's data API to get the most recent weather data, store it in Astra DB, and display it on a simple front-end. The project uses Java 17 Spring Boot Maven Vaadin with an Astra DB account and Langflow instance. The application can pull the latest reading from Astra DB for a specific station and year/month combination, and also refresh its data view from either the Astra DB Data API or from a Langflow API endpoint. To build the project, developers need to assemble the Raspberry Pi, install Java Virtual Machine (JVM) and Java Development Kit (JDK), install Maven, create an SSH key, and clone the project repository. After building and running the application, it can be accessed by navigating to `http://127.0.0.1:8080/` and clicking on "Astra DB Refresh" or "Langflow Refresh". The application displays the latest weather data from Astra DB.