marginalia Private, self-hosted RSS reader web application in Java, designed for seamless access across desktop and mobile devices. c4002-python Python library and CLI monitor for the DFRobot C4002 24GHz mmWave radar sensor on Raspberry Pi. PiLambdaChart Serverless IoT telemetry platform ingesting Raspberry Pi sensor data into DynamoDB with scheduled AWS Lambda chart generation and S3/CloudFront hosting. sumpdata Showcase Java Spring Boot application that manages IoT device telemetry data via a clean REST API.