Cipek's profile - activity

I have been looking for the solution really long and that worked! Thank you.

It worked perfectly. Thank you.

I want to execute a script with a ProcessBuilder(). My code is:

new ProcessBuilder().inheritIO().command("/bin/bash", "-c", "./deploy.sh").start();

In the bash script I have:

#!/bin/bash
rosrun my_package ardrone_test_1.py

It works if I run the bash script manually in the terminal, but if I do with the ProcessBuilder I got an error:

rosrun: command not found

The same if I run python scripts which uses ROS. There are errors that some package are not found, whereas it works fine if run via terminal.

How to move a drone by a given distance using ardrone_autonomy I am working on a script for controlling a drone with ard

Could you support me with some links or example for this statemachine pattern?

Could you support me with some links?

Running OpenCV code- error: ‘DescriptorMatcher’ was not declared in this scope I have installed the OpenCV on my machine

ros::spinOnce() blocks publisher I am working on controlling the AR Drone with c++ script. I added the subscriber for ch

ros::spinOnce() blocks publisher I am working on controlling the AR Drone with c++ script. I added the subscriber for ch

I want to track the state of the AR Drone. For that, I have created a Subscriber, but for some reason, it doesn't go into my callback function. This is my code:

#include "ros/ros.h"
#include "std_msgs/Empty.h"
#include "std_msgs/String.h"
#include <iostream>
#include <ardrone_autonomy/Navdata.h>
using namespace std;
using namespace ros;
using namespace std_msgs;

//from ardrone_autonomy.msg import Navdata

ardrone_autonomy::Navdata data;
int state;

void receiveNavdata(const ardrone_autonomy::Navdata& data)
{
    cout<<"\nIN NAV"<<endl;
    cout<<"\nState: "<< data.state<<endl;   
    state=data.state;   
}

int main(int argc, char **argv){

  init(argc, argv, "talker");
    NodeHandle rospy;

    Subscriber navData = rospy.subscribe("/ardrone/navdata", 1, receiveNavdata);


while( state == -1){
    ros::spinOnce();
    ros::Duration(0.1).sleep();
}   

Publisher takeoff = rospy.advertise<Empty>("/ardrone/takeoff", 1);

while(takeoff.getNumSubscribers() < 1){
    ros::Duration(0.1).sleep();
}

cout<<"\nTakeOff"<<endl;

takeoff.publish(empty);
ros::Duration(5).sleep();

    return 0;
}

Callback for a Ardrone Navdata Subscriber doesn't work I want to track the state of the AR Drone. For that, I have creat

I edited it. The problem is that it never prints out "take off". It stays in the while loop just before the cout. But as

I edited it. The problem is that it never prints out "take off"

I edited it. The problem is that it never prints "take off"

Callback for a Ardrone Navdata Subscriber doesn't work I want to track the state of the AR Drone. For that, I have creat

it helped but now it blocks here while(takeoff.getNumSubcsribers() < 1){...}, but it doesn't when I do not do spinOnc

it helped but now it blocks here while(takeoff.getNumSubcsribers() < 1){...}, but it doesn't when I do not do spnOnce

it helped but now it blocks here while(takeoff.getNumSubcsribers() < 1){...}, but it doesn't when I do not do spnOnce

You were right that spin(), but now I need to create a system which waits until the state is defined and do something. I

You were right that spin(), but now I need to create a system which waits until the state is defined and do something. I

Callback for a Ardrone Navdata Subscriber doesn't work I want to track the state of the AR Drone. For that, I have creat

Scripts don't see ROS if executed by ProcessBuilder() I want to execute a script with a ProcessBuilder(). My code is: n

Error when running python script with ProcessBuilder()- rospkg.common.ResourceNotFound: rosgraph I want to run a python

Error when running python script with ProcessBuilder()- rospkg.common.ResourceNotFound: rosgraph I want to run a python

Okay. No worries. I'll do some research then.

I have written a simple python script to takeoff the drone.

#! /usr/bin/env python
import rospy
from std_msgs.msg import Empty

rospy.init_node('cipek')

empty = Empty()
takeoff = rospy.Publisher('/ardrone/takeoff', Empty, queue_size=1)
land = rospy.Publisher('/ardrone/land', Empty, queue_size=1)

takeoff.publish(empty)
print("works")

I have created a package with catkin. In one terminal I run roscore, in the other rosrun ardrone_autonomy ardrone_driver and in third rosrun my_package script.py. The python script is runnable (I have run chmod +x on it), and it works because it print out "works". The problem is that the drone doesn't react at all. However, when I run rostopic pub ardrone/takeoff std_msgs/empty "{}" --once in the console it works perfectly. Any ideas what is wrong?