Unfortunately no, the system delays do not allow synchronization within 1/100 second. I'll have to stick with wired controllers for shutter release. There may be a way using Broadcast messages if I can write a daemon for the NX500 to trigger the shutter when it receives a message.
This code may be a helpful starting point for other purposes when accessing the camera with Telnet. You can get the code on Github at
https://github.com/ajavamind/ProcessingAndroidTelnetTwinNX500
debug:
### [2016/10/15 10:40:32] PROCESS @ TcpClient ### starting new TcpClient 192.168.1.192:23
name1=Right
### [2016/10/15 10:40:32] PROCESS @ TcpClient ### starting new TcpClient 192.168.1.204:23
name2=Left
READY TAP
2: [root@drime5 ~]#
1: [root@drime5 ~]#
2: [root@drime5 ~]# st app nx capture single
1: [root@drime5 ~]# st app nx capture single
2: [root@drime5 ~]#
1: [root@drime5 ~]#
1: [root@drime5 ~]# st app nx capture single
2: [root@drime5 ~]# st app nx capture single
1: [root@drime5 ~]#
2: [root@drime5 ~]#