Connectivity~5 min read
MQTT topics and device shadow: an evolvable message topology
From a single project to multi-tenant setups—how to name topics and model shadow state without painting yourself into a corner.
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Prefer segmented prefixes such as `tenant/{id}/device/{did}/telemetry` for ACLs and routing. Split commands and telemetry onto separate channels to avoid blocking each other.
Device shadow fits “desired vs reported” state well and can buffer commands and merge deltas on flaky networks.
If you later add multi-protocol gateways, map to a unified thing model at the edge while keeping one shadow API in the cloud.
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