"Testing MQTT based IoT Applications"
summary
Claims that MQTT suits unstable networks and shows exactly how QoS 0 vs QoS 1 behave: a simple Python script test connects a publisher and subscriber, sends five messages and disconnects the subscriber between messages 2 and 3. Observed: with QoS 0 the subscriber receives messages 1,2,5 only; with QoS 1 it receives 1–5. The demo builds a publisher/subscriber pair against a broker and validates message retention and delivery semantics, confirming different broker implementations must be tested for spec variations.
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