iot-connectivity
Connect IoT fleets reliably — choosing MQTT/CoAP/HTTP/LoRaWAN, MQTT QoS and topic design, device provisioning and identity, OTA updates, surviving intermittent links (store-and-forward, last-will), and per-device TLS security. Deep reference with worked examples and a runnable topic validator.
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Overview
Connecting a fleet of constrained devices over flaky networks is a different discipline from building a web backend. Bandwidth is metered, radios drain batteries, links drop for hours, and a device shipped to a customer site cannot be SSH'd into. This skill is the deep reference for getting device-to-cloud traffic reliable, secure, and cheap. Heavy detail lives in references/; copy-paste material
What it covers
- Choosing a protocol
- MQTT QoS and topic design
- Provisioning and identity
- OTA updates
- Surviving intermittent connectivity
- Security
- MQTT Design — QoS, Topics, Retained Messages, ACLs
- Protocol Selection — MQTT vs CoAP vs HTTP vs LoRaWAN