Industrial MQTT topic design: names, payloads and data contracts
Design a stable telemetry namespace with identity, timestamps, units, quality and schema ownership before connecting dashboards and consumers.
QoS (MQTT)
MQTT delivery guarantees: 0, 1, or 2.
MQTT quality of service: QoS 0 (at most once), QoS 1 (at least once, may duplicate), QoS 2 (exactly once). Negotiated per hop and capped by the subscription — publishing high to a low-QoS subscriber still delivers at most once.
See also: MQTT · Sparkplug B
Use the concept: Industrial data connectivity: from register to consumer · Industrial data contract template
In depth
Industrial MQTT gateway checklist for a brownfield plant
The decisions that matter before an MQTT edge gateway leaves the lab: protocol drivers, buffering, namespaces, quality, security, and ownership.
Choosing an industrial network topology
Star, line, ring, and redundant designs explained through failure modes, commissioning effort, latency, and the maintenance team’s real needs.