rtlamr2mqtt is a Home Assistant add-on and standalone Docker container that reads utility meters (electric, gas, water) using an RTL-SDR USB receiver and publishes readings to MQTT. The application runs rtl_tcp to interface with the SDR hardware and rtlamr to decode meter transmissions, parsing the JSON output and publishing formatted readings, HA auto-discovery payloads, and status to an MQTT broker. It supports sleep/wake cycles to conserve resources on Raspberry Pi, automatic process restart with backoff, USB device reset on timeout, and listen mode for discovering unknown meter IDs. The architecture is fully async (asyncio TaskGroup) with three independent tasks: MeterReader (rtlamr output parsing), MQTTPublisher (aiomqtt-based MQTT communication), and ManagedProcess (generic async subprocess lifecycle manager). It can run as a Home Assistant add-on (auto-discovers MQTT via Supervisor API) or standalone with a YAML config file.
DSMR-reader is a production-grade Django web application for reading, storing, and visualizing Dutch Smart Meter (DSMR) data from the P1 port. It parses electricity, gas, and water consumption telegrams via serial or network socket, computes hourly/daily statistics with cost calculations, and provides a comprehensive web dashboard with interactive ECharts graphs, a REST API (v1/v2), and integrations with MQTT, InfluxDB, Dropbox, PVOutput, MinderGas, and notification services (Pushover, Telegram, Prowl). The application is container-first (Docker/Podman) and requires PostgreSQL 14+. It exhibits a modular Django app architecture with a signal-driven service layer, singleton settings via django-solo, and extensive test coverage. The frontend is built with Bootstrap 3, jQuery, and Font Awesome 7.2.0 but carries significant technical debt (legacy libraries, unused CSS, jQuery UI), and the project maintains a detailed tech-debt document tracking planned upgrades.