chusikowski's profile - activity

How to publish pose in new frame? Hi all, Thanks a lot for reading my question. I am currently running a simulator in p

How to publish pose in new frame? Hi all, Thanks a lot for reading my question. I am currently running a simulator in p

How can I move a Frame to its initial position after sequence Dear all, Thanks a lot for reading my question. I am curr

How can I move a Frame to its initial position after sequence Dear all, Thanks a lot for reading my question. I am curr

How can I move a Frame to its initial position after sequence Dear all, Thanks a lot for reading my question. I am curr

How can I move a Frame to its initial position after sequence Dear all, Thanks a lot for reading my question. I am curr

How can I move a Frame to its initial position after sequence Dear all, Thanks a lot for reading my question. I am curr

How can I move a Frame to its initial position Dear all, Thanks a lot for reading my question. I am currently running a

How can I move a Frame to its initial position Dear all, Thanks a lot for reading my question. I am currently running a

How can I move a Frame to its initial position Dear all, Thanks a lot for reading my question. I am currently running a

How can I move a Frame to its initial position Dear all, Thanks a lot for reading my question. I am currently running a

@stevemacenski thanks a lot for your answer, I will look into this and get back to you.

How to reset odometry pose Hello all, I have a python code (see below) that publishes short commands in the form of a t

How to get publisher and callback to talk to one another (python) Hello, I am trying to get my code (python)to publish

Hello,

I am trying to get my code (python)to publish a simple sequence in form of a Twist message, and then get the timestamp of when those messages are executed with the callback function. This is somehow not working, can someone please help? Thank you in advance.

The code:

#!/usr/bin/env python
import rospy
from geometry_msgs.msg import Twist, TransformStamped

Times = []
x_pos = []

class CommandEvaluatorNode(object):

    def __init__(self):
        self.cmd_vel_pub = rospy.Publisher('cmd_vel', Twist, queue_size = 10) 

    def run_command_tests(self):
        r = rospy.Rate(0.8)
        twist_sequence = [[1, 1, 1], [2, 2 , 3],[3, 3, 4]]
        rospy.loginfo("Publishing first sequence")
        for cmd in twist_sequence:
            r.sleep()
            msg = Twist()
            msg.linear.x = cmd[0]
            msg.linear.y =cmd[1]
            msg.angular.z = cmd[2]
            x_pos.append(cmd[0])
            self.cmd_vel_pub.publish(msg)

    def callback(self, msg):
        l = rospy.Rate(0.8)
        l.sleep()
        time = msg.header.stamp.secs + msg.header.stamp.nsecs * 1e-9
        Times.append(time)

    def ros_init(self):
        rospy.init_node('cmd_evaluator', anonymous=True)
        rospy.Subscriber("tf", TransformStamped, self.callback) 

if __name__ == '__main__':
    rosnode = CommandEvaluatorNode()
    rosnode.ros_init()
    rosnode.run_command_tests()

Thank you for your help. After some playing around with the code and implementing a delay with rospy.Rate() I managed to

@kump , @rukie thank you for the input. I will have a look at this.

How to get publisher and callback to talk to one another (python) Hello, I am trying to get my code (python)to publish

How to get publisher and callback to talk to one another (python) Hello, I am trying to get my code (python)to publish

Hi @rukie , @jayess thank you very much for your answers. I edited the code to showcase the full thing. The reason why

How to get publisher and callback to talk to one another (python) Hello, I am trying to get my code (python)to publish

How to get publisher and callback to talk to one another (python) Hello, I am trying to get my code (python)to publish

How to get publisher and callback to talk to one another (python) Hello, I am trying to get my code (python)to publish