Anyone been using Ros for LabVIEW toolkit? I have an issue I could use some help resolving...

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Has anyone else experience in working with the ROS for LabVIEW toolkit in LabVIEW?

I am having issues and am finding it difficult to get these answered on other forums (NI & GitHUB, both labview related).

I am using;

• LabVIEW 2018 (operating on Windows 10)
• 'LabVIEW for ROS' add on
• ROS kinetic
• Ubuntu 16.04LTS

I am running Linux & Ubuntu on VMware Workstation 15 Player).

So, I have 2 VIs (one named Publisher and one named Subscriber).

I have 2 python files (one named talker.py and one name listener.py).

The problem: I am able to send data from ROS publisher (talker.py) to my LabVIEW VI subscriber. However, I am unable to send data from LabVIEW publisher VI to ROS subscriber (listener.py).

The 2 python files are below.

I cannot attach the VI`s so I have attached images of them below too, hopefully that is ok.. I followed this tutorial to create both VIs (https://forums.ni.com/t5/ROS-for-LabV...).

talker.py

#!/usr/bin/env python

## Simple talker demo that published std_msgs/Strings messages

## to the 'chatter' topic

import rospy

from std_msgs.msg import String

def talker():

    pub = rospy.Publisher('chatter', String, queue_size=10)

    rospy.init_node('talker', anonymous=True)

    rate = rospy.Rate(10) # 10hz

    while not rospy.is_shutdown():

        hello_str = "hello world %s" % rospy.get_time()

        rospy.loginfo(hello_str)

        pub.publish(hello_str)

        rate.sleep()

if __name__ == '__main__':
    try:

        talker()
except rospy.ROSInterruptException:

    pass

listener.py

#!/usr/bin/env python

## Simple talker demo that listens to std_msgs/Strings published 

## to the 'chatter' topic

import rospy

from std_msgs.msg import String

def callback(data):

    rospy.loginfo(rospy.get_caller_id() + 'I heard %s', data.data)

def listener():

     rospy.init_node('listener', anonymous=True)

    rospy.Subscriber('chatter', String, callback)

    # spin() simply keeps python from exiting until this node is stopped

    rospy.spin()

if __name__ == '__main__':

    listener()

Image of publisher VI

Image of subscriber VI