How do send control commands?

[tasbolat1]

Hey guys,
thanks for the package. It works very nice under ROS kinetic. Now, I have one problem: I cannot send control commands to the server (Motive) to start the data recording. My code is as follows:
`
#!/usr/bin/env python
import rospy, os

import socket
import optirx as rx

from optitrack.utils import get_ip_address, read_parameter

if name == 'main':

# Connect to the optitrack system
rospy.init_node("recorder")
iface = read_parameter('~iface', 'wlp3s0')
version = (2, 10, 0, 0)  # the latest SDK version
optitrack = rx.mkcmdsock(ip_address=get_ip_address(iface), port=1512)
#optitrack = rx.mkcmdsock(ip_address="192.168.0.77", port=5050)

header_b = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?>"
start_string = "<CaptureStart><TimeCode VALUE=\"12 13 14 15 0 0 1 1\"/><Name VALUE=\"RemoteTriggerTest_take01\"/><Notes VALUE=""/><Description VALUE=""/><DatabasePath VALUE=\"C:Users\\tracking\\Downloads\"/><PacketID VALUE=\"0\"/><ProcessID VALUE=\"" +str(os.getpid()) +"\"/></CaptureStart>"
print(len(header_b+start_string))
print(optitrack.sendto(header_b+start_string, ("192.168.0.77", 1512)))

print('Successfully connected to optitrack')

`

From the server's side, I can receive the data if I open random server with random port number (checked). But when the data is sent to motive's server, no reaction. Can you guys advise on this?

Best,
Tasbolat