Give every device a trusted identity
Connected systems need a controlled provisioning process so devices can authenticate securely and receive only the permissions they require.
Design MQTT topics as an interface
Topic structure should reflect ownership, message purpose and access boundaries. Treating topics casually makes security and future evolution harder.
Separate telemetry, state and commands
High-volume telemetry, desired/reported state and remote commands have different reliability and processing characteristics. Designing them separately creates clearer cloud behaviour.
Use event-driven processing behind the device layer
Device messages often need validation, persistence, alerts, analytics or business workflows. Queues and events can isolate those concerns from the live device connection.
Expect the network to be imperfect
Devices may go offline, reconnect, duplicate messages or respond late. Production logic should account for those states rather than assuming permanent connectivity.
Connect IoT to the applications people use
The value of the connected platform appears when secure web and mobile applications turn device state into useful operational decisions.