MQTT实战 - 遗嘱消息+心跳机制，让你的设备永远不会“假在线”（七） - IT规划师 - 蓝鲸体育
2026-10-24
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TCP KeepAliveLWTRetain ReliableDeviceClient 12 00 8 dashboard Broker KeepAlive 3600 Broker 1.5 × 3600 = 5400 8 2 NB-IoT KeepAlive 60 60 PINGREQ 90% 48 30% 3 11 DISCONNECTTCP last_seenIsConn… [+19332 chars]
