docs(mqttsn): fix qos3 description #3122
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QoS 3 is QoS -1 in MQTT-SN spec. And it is not "exactly once".
Meggielqk
approved these changes
Aug 15, 2025
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fixes: emqxarchive/emqx-sn#200
QoS 3 is QoS -1 in MQTT-SN spec.
And it is not "exactly once".