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iot

Sending a command over pub/sub and matching its acknowledgement with a correlation ID and a timeout

taught

Taught in

Requires

Required by

Local knowledge map

Local knowledge map

Collecting remote logs and support bundles and running only safe… Confirming, auditing and undoing commands sent from a dashboard Sending a command over pub/sub and matching its acknowledgement… Choosing clean or persistent sessions and reasoning about… Computing a shadow's delta from desired and reported state, with… Explaining publish/subscribe through a broker and… Granting users roles and permissions over devices and data Ingesting telemetry from a broker into a store with validation… Testing connected firmware and back ends under loss, latency… Using MQTT 5 reason codes, message expiry, user properties and… Using retained messages for last-known state and… Choosing MQTT QoS 0, 1 or 2 by what each guarantees and costs,… Classifying a message as telemetry, a command or state, and… Recognizing at-least-once delivery and making a receiver… Buffering readings in a bounded offline queue with a drop… Matching MQTT topics against filters with + and #, including the… Naming the roles in a connected system (device, gateway,…

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Solid arrows are required prerequisites; dashed are recommended or helpful. Lower rows are more foundational. Click any box to jump to that concept.