andruino's profile - activity

try with a std_msgs/String

Thank you. I am ussing the old access point again. On the new AP all filters and firewalls were disabled. Mainly I just wanted to know if the problem was something common that happened to others. When I'll have any time, I'll get the protocol analyzer. Thanks again for your comment.

In a ROS network, with several computer/robots everything was right... I have change the access point and do not work, even when I have disable the access point firewall... Most of the connections works (images, sensors...), but strings messages do not... Any idea?

Look at http://answers.ros.org/question/52098...

Hi everyone! I'm trying to implement a TF broadcaster in rosjava to transform from base_link to odom with the code shown below. When I run the command "rosrun tf view_frames" tells me "no tf recieved data", but if I run the command "rostopic echo tf" shows time, rotation and translation.

What am i missing?

public class nodo_odom_pub implements NodeMain {

String base_frame_id = "base_link";
String odom_frame_id = "odom";

@Override
public void onStart(final ConnectedNode node) {


    final Publisher<Odometry> publisher = node.newPublisher("/odom", "nav_msgs/Odometry");
    final Publisher<TransformStamped> broadcaster = node.newPublisher("/tf", TransformStamped._TYPE);

        node.executeCancellableLoop(new CancellableLoop() {

        @Override
        protected void setup() {

        }

        protected void loop() throws InterruptedException {

            long time_delta_millis = System.currentTimeMillis(); // - SystemClock.uptimeMillis();

            TransformStamped transform = broadcaster.newMessage();

                            transform.getTransform().getRotation().setX(0);
            transform.getTransform().getRotation().setY(0);
            transform.getTransform().getRotation().setZ(Math.sin(gAzimut / 2));
            transform.getTransform().getRotation().setW(Math.cos(gAzimut / 2));

            transform.getTransform().getTranslation().setX(x);
            transform.getTransform().getTranslation().setY(y);
            transform.getTransform().getTranslation().setZ(0);

            transform.getHeader().setStamp(Time.fromMillis(time_delta_millis));

            transform.setChildFrameId(base_frame_id);
            transform.getHeader().setFrameId(odom_frame_id);

            broadcaster.publish(transform);


        }

    });

}

}

An viable alternative for the Windows' classrooms enviroment (or for Microsoft Windows OS users) is to use a Ubuntu virtual machine over a Windows OS using Virtual Box. Even virtual machine with ROS installed ready-to-use exists as .ova files for VirtualBox from nootrix http://nootrix.com/software/virtualiz...

I am developing ( slowly) a mobile robot with ROS costing less than 35 euros , for education, using Android and Arduino. (Any collaboration is welcome !! :-) . I would add "cloud" capabilities to the robot, so is there any information for integrating Google Cloud Vision or a similar service in ROS?. Thanks

Thank you very much! I will follow your recommendations. Thanks again

Thanks for the response, i am ros beginner, so I would try to explain better this time: The robot runs with a RosAndroidApps and I can command the robot from a PC with Ubuntu and ROS Groovy using command as "rostopic pub COMMAND", because the RosAndriodApps have an active topic to receive orders. So, I would like to have an GUI (like SCADA) in the PC to graphically control several robots (control arrows, buttons on/off, etc...of each robot) and to show the images and measures from the robots into the PC screen, and to make some data aggregations from data reaching from differents robots. So, I need just an idea of where to begin... Thanks again

Thanks for the response, i am ros beginner, so I would try to explain better this time: The robot runs with a RosAndroidApps and I can command the robot from a PC with Ubuntu and ROS Groovy using command as "rostopic pub COMMAND", because the RosAndriodApps have an active topic to receive orders. So, I would like to have an GUI (like SCADA) in the PC to graphically control several robots (control arrows, buttons on/off, etc...of each robot) and to show the images and measures from the robots into the PC screen, and to make some data aggregations from data reaching from differents robots. So, I need just an idea of where to begin... Thanks again

I'm designing a robot based on Android with ROS, now I can control the robot and get data from it using the command line "rostopic pub" and "rostopic echo", but how could make nicer GUI (something like "turtlebot Interactive Markers", but much more simple)?

Thanks in advance

PD. I would like to participate in the Spanish and Portuguese transalate of ROS, any information about that?