This is a Prometheus exporter for AVM Fritz! home network devices (routers, repeaters, mesh, DECT smart home) that exposes metrics via a TR-064 SOAP API and the AVM AHA HTTP API. Production deployment is a standalone Python service listening on a configurable address:port (default 127.0.0.1:9787) and registering Prometheus metric families (fritz_*). The architecture is a single-process monolith with a clean capability discovery framework: each metric group is defined as a FritzCapability subclass that declares its TR-064 requirements, probes the device at startup, and generates metrics on each scrape. Devices are configured via a YAML file or environment variables, validated through attrs-based data classes. The exporter handles multi-device mesh scenarios, connection timeouts, offline devices with retry logic, and a concurrent scrape lock to avoid deadlocks. It also includes a data donation mode (--donate-data) that collects all available TR-064 actions from a device, sanitizes sensitive fields, and uploads anonymously to a project endpoint — a hybrid feature supporting both operational monitoring and community-driven compatibility research. External dependencies include the fritzconnection library for TR-064, prometheus_client for metric exposition, defusedxml for secure XML parsing, PyYAML for configuration, and requests for HTTP transport.