https://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levels/ MQTT provides three levels of QoS: - At most once (QoS 0) - At least once (QoS 1) - Exactly once (QoS 2)
https://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levels/
MQTT provides three levels of QoS: