Mqtt

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.

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.

A case study for a proof-of-concept self-watering garden system that uses soil moisture telemetry, an edge gateway, MQTT, REST APIs, and a dashboard to coordinate irrigation decisions.

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.

MQTT is a messaging protocol commonly reffered to as Publish/Subscribe or is an popular solution to distributed system communications, where you do not want to directly couple the publisher and subscribers. That is a fundamental design of this MBR project.