1MQTT-3.1.1-CN目录1概述.......................................................................................................................................................................81.1MQTT协议的组织结构.....................................................................................................................................81.2术语.....................................................................................................................................................................81.3规范引用.............................................................................................................................................................91.4非规范引用.......................................................................................................................................................101.5数据表示...........................................................................................................................................................121.5.1二进制位...................................................................................................................................................121.5.2整数数值...................................................................................................................................................121.5.3UTF-8编码字符串..................................................................................................................................121.6编辑约定...........................................................................................................................................................132MQTT控制报文格式........................................................................................................................................142.1MQTT控制报文的结构...................................................................................................................................142.2固定报头...........................................................................................................................................................142.2.1MQTT控制报文的类型..........................................................................................................................142.2.2标志...........................................................................................................................................................152.2.3剩余长度...................................................................................................................................................162.3可变报头...........................................................................................................................................................172.3.1报文标识符...............................................................................................................................................172.4有效载荷...........................................................................................................................................................193MQTT控制报文................................................................................................................................................203.1CONNECT–连接服务端......................................
