MQTT Delivery Quick Reference
Recall the MQTT delivery features that most affect IoT reliability decisions.
QoS 0 When is MQTT QoS 0 usually acceptable? Use QoS 0 when occasional message loss is tolerable and a later reading or freshness rule can recover the operational picture. Routine periodic telemetry often fits this pattern; commands and audit events usually need more care. QoS compare QoS 1 versus QoS 2: what is the practical tradeoff? Higher QoS is not automatically better; it must match loss and duplicate consequences. Objection If messages are missing, should we just turn on retained messages everywhere? A teammate wants late subscribers to see current device state. Your line Retain current state topics, not…
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