Internet of Things (IoT) on Rusty Eddy

OttO: A Go-Based IoT Edge Gateway Architecture

Thu, 13 Jan 2022 00:00:00 +0000

A practical architecture overview of OttO, the Go-based IoT edge gateway used by the Organic Gardener project.

ESP32 Collection Station Architecture for IoT Sensor Networks

Thu, 13 Jan 2022 00:00:00 +0000

A device-side architecture note for ESP32 collection stations in the Organic Gardener IoT system.

The Five Layers of a Practical IoT System

Sat, 15 Nov 2025 00:00:00 +0000

A practical five-layer model for IoT architecture, grounded in the OttO edge runtime and the Gardener reference application.

Building an IoT Device Abstraction Layer in Go

Sun, 02 Nov 2025 00:00:00 +0000

IoT applications get hard to maintain when hardware code and application logic are tangled together. A prototype can read one GPIO pin or one I2C sensor directly. A real system has sensors, actuators, timing loops, message publishing, local storage, APIs, dashboards, and failures that happen at the edge.

The useful boundary is a device abstraction layer: hardware-specific drivers stay below it, application logic stays above it, and the two communicate through small interfaces.

IoT System Architecture (Device to Cloud)

Fri, 13 Jan 2023 00:00:00 +0000

This page is a diagram-first overview of the IoT architecture used throughout the projects on this site. It is for engineers who need to decide where device logic ends, where edge coordination begins, and how telemetry, control, APIs, storage, and user interfaces fit together.

The goal is not to present a single correct design. The goal is to show a reasonable baseline that can grow beyond demos without locking the system to one board, one sensor, one database, or one user interface.

Self-Watering Garden: An IoT Architecture Case Study

Wed, 25 May 2022 00:00:00 +0000

A practical case study showing how a self-watering garden can be designed as an IoT system with clear device, gateway, API, and dashboard boundaries.

REST APIs for IoT Gateways: Control, Configuration, and Telemetry Access

Wed, 30 Mar 2022 00:00:00 +0000

A practical REST API design note for IoT gateways, covering Go handlers, JSON responses, endpoint boundaries, testing, and common API pitfalls.

Adding MQTT to the IoT Gateway

Tue, 29 Mar 2022 00:00:00 +0000

A practical MQTT implementation note for the OttO IoT gateway, covering topic design, subscriptions, callbacks, testing, and memory boundaries.