12-21 15:41:45.019 I/hostapd ( 3893): ap0: STA 28:c7:09:63:e0:a3 IEEE 802.11: associated 12-21 15:41:45.019 I/wificond( 631): New station 28:c7:09:63:e0:a3 associated with hotspot 12-21 15:41:45.020 I/hostapd ( 3893): ap0: STA 28:c7:09:63:e0:a3 IEEE 802.11: associated 12-21 15:41:45.020 D/SoftApManager( 1081): Setting num stations on CMD_NUM_ASSOCIATED_STATIONS_CHANGED 12-21 15:41:45.021 D/SoftApManager( 1081): Number of associated stations changed: 1 12-21 15:41:45.021 D/SoftApManager( 1081): Timeout message canceled 12-21 15:41:45.027 I/EthernetTracker( 1081): interfaceLinkStateChanged, iface: ap0, up: true 12-21 15:41:45.030 I/netd ( 441): interfaceGetCfg("ap0") <0.92ms> 12-21 15:41:45.046 I/hostapd ( 3893): ap0: AP-STA-CONNECTED 28:c7:09:63:e0:a3 12-21 15:41:45.047 I/hostapd ( 3893): ap0: STA 28:c7:09:63:e0:a3 WPA: pairwise key handshake completed (RSN) 12-21 15:41:45.047 I/hostapd ( 3893): ap0: STA 28:c7:09:63:e0:a3 WPA: pairwise key handshake completed (RSN) 12-21 15:41:45.099 D/nwdapp_GPSMonitorService( 1632): change time myLocation=null,mGpsSyncTimeSwitch = true 12-21 15:41:45.101 D/nwdapp_GPSMonitorService( 1632): location error,so delay 5s set time 12-21 15:41:45.333 D/nwdapp_UartCommunication( 1515): 2EA002000F4E这段log表示什么

这段 log 信息表示有一个设备（STA）使用了 IEEE 802.11 协议连接到了某个 AP。这个设备的 MAC 地址是 28:c7:09:63:e0:a3。连接成功后，这个设备和 AP 完成了 WPA 协议的 pairwise key 密钥交换。这个过程称为 "pairwise key handshake"。在交换完成后，这个设备和 AP 之间通信的数据就可以被加密保护。另外，这个 log 中的最后一行 "2EA002000F4E" 似乎并没有什么直接关联。