The Five Layers of a Practical IoT System
A practical five-layer model for IoT systems, showing how devices, protocols, edge runtime, backend services, and applications fit together.
Building an IoT Device Abstraction Layer in Go
How Go interfaces, generics, mocks, and a device manager separate hardware drivers from IoT application logic in an edge runtime.
Adding MQTT to the IoT Gateway
How the OttO IoT gateway uses MQTT to receive telemetry from device stations, parse topic-based sensor identifiers, pass readings through Go channels, and protect the gateway from unbounded in-memory growth.
ESP32 Collection Station Architecture for IoT Sensor Networks
How an ESP32-based collection station fits into an IoT system: sensor sampling, MQTT publishing, local buffering, sleep modes, OTA updates, and the boundary between device firmware and the edge gateway.
OttO: A Go-Based IoT Edge Gateway Architecture
OttO is a Go-based IoT edge gateway that connects sensor stations, MQTT messages, REST APIs, WebSocket dashboards, and application logic at the boundary between devices and backend systems.
Go timers to remove stale sensor stations
Older IoT gateway note showing how Go timers can track stale sensor stations, expire inactive devices, and keep gateway state from drifting.