# PHOA Water Meter System > A two-tier wireless telemetry system for Badger ORION residential water meters. Distributed ESP32 **Node** receivers decode meter transmissions over 900 MHz FSK; they can either be deployed standalone on local WiFi (for small clusters) or feed a central **Gateway** over a 433 MHz CC1101 mesh that uploads readings to a Windows / FastAPI ingest service on the local LAN. Firmware is proprietary, copyright Competition Software, with OTA updates. ## Pages - [Overview](https://eheuristics.com/): how the Node + Gateway fit together, with a flow diagram. - [Water Meter Node](https://eheuristics.com/node.html): ESP32 receiver, autodetects SX1276/SX1262, supports ORION P223/P282/P290, embedded dashboard, email reports, OTA. - [Water Meter Gateway](https://eheuristics.com/gateway.html): ESP32 + CC1101 mesh hub, HTTP ingest with retry buffer, fallback WiFi AP, optional W5500 Ethernet, remote mesh commands, daily email. ## Machine-readable specs - [Node JSON](https://eheuristics.com/api/node.json): full Node specification, features, and live endpoint table. - [Gateway JSON](https://eheuristics.com/api/gateway.json): full Gateway specification, features, and live endpoint table. ## Optional - All HTML pages include `schema.org/Product` JSON-LD in ``. - The site is static (Caddy file_server), every page lives at a stable URL, and no JavaScript is required to read the content.