iot
Choosing MQTT QoS 0, 1 or 2 by what each guarantees and costs, and applying the delivery downgrade
taught
Taught in
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Quality of service
Connected Devices and the Internet of Things
Requires
- mqtt-topic-wildcards required
Required by
- Choosing clean or persistent sessions and reasoning about what a broker queues for an offline client required
- Sending a command over pub/sub and matching its acknowledgement with a correlation ID and a timeout required
- Using MQTT 5 reason codes, message expiry, user properties and shared subscriptions required
- Using retained messages for last-known state and a last will for presence required
Local knowledge map
Local knowledge map
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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.