MQTT QoS 0, 1, 2 Explained: A Quickstart Guide
出处：
openapi.lddgo.net
作者：
Zibo Zhou
In unstable network environments, MQTT devices may struggle to ensure reliable communication using only the TCP transport protocol. To address this issue, MQTT includes a Quality of Service (QoS) mechanism that offers various message interaction options to provide different levels of service, catering to the user's specific requirements for reliable message delivery in different scenarios.
