Constrained civic sensors must send small telemetry with minimal protocol overhead. When is CoAP over UDP often a better fit than MQTT over TCP?
Select an answer to reveal the explanation.
Short Explanation
Tiny sensors often prefer CoAP/UDP—light knocks on the door—over keeping an MQTT/TCP conversation open all day. Save MQTT for brokers that expect that session model. SMB and captive portals are not constrained-device telemetry tools.
Full Explanation
CoAP is designed for constrained nodes and networks, commonly running over UDP with a compact RESTful model, whereas MQTT typically uses TCP (or variants) with a broker session paradigm. Planners choose CoAP when device and network constraints dominate, and MQTT when pub/sub broker ecosystems fit better—not for bulk file WAN transport, captive portals, or SMB telemetry.