Tima1995's profile - activity

So that the data is stored for some time? I thought that this one is for slow-changing data as siad in the documentation

So that the data is stored for some time? I will try that one out!

The problem for me is, if I just publish once, without the time loop, the robot rarely gets the message. That's why I am

Thanks for the answer. That worked out fine!

Thanks for the response! I just added the .launch files for the navigation package and for the move_base package.

Remapping navigation topics for own nodes Hello ROS forum, I am just trying to make my navigation algorithm "user-frien

When running the code above, the following mistake occure for the node that publishes the action: [WARN] [1572096179.848

Hello Delb and thanks for the answer! The point for me is, that the navigation node that publishes the action needs in a

Hello Delb and thanks for the answer! The point for me is, that the navigation node that publishes the action needs in a

Hello Delb and thanks for the answer! The point for me is, that the navigation node that publishes the action needs in a

Remapping navigation topics for own nodes Hello ROS forum, I am just trying to make my navigation algorithm "user-frien

Unstable Communication between ROS Node and Robot Hey ROS Forum, I am just trying to make my robot navigate from a init

Unstable Communication between ROS Node and Robot Hey ROS Forum, I am just trying to make my robot navigate from a init

Thanks for the answer! Regarding map_server , I am not very common with RVIZ. Then I have to have a deeper look at that

Hey guys,

I am right now trying to build up my own navigation solution. I succesfully made it to let my robot start from a initial to a goal position using my own navigation algo. Now I am trying to use RVIZ for setting the initial and goal position by simply marking it on the map as estimations. I saw, that the turtlebot uses the same solution for it` navigation program. I had a look at that one and it seems pretty complex with the amcl package etc.

The only thing I need is getting the initial and goal position as coordinates as input for my algo. The precision of the localization is not a priority for me. But here comes my question. I can use

rospy.wait_for_message('move_base_simple/goal', PoseStamped)
rospy.Subscriber('move_base_simple/goal', PoseStamped, self.update_goal)

to get the goal position, but is there also something to get the initial position?

Secondly, I tried to use

rosrun map_server map_server map.yaml

for loading my map but nothing happened. Is there another command to get into the GUI where I can load my map and choose the positions for goal and start?

Kind regards and thanks in advance!

Thanks for the answer! Regarding map_server , I am not very common with RVIZ. Then I have to have a deeper look at that

Build a a own navigation using RVIZ for initial and goal position Hey guys, I am right now trying to build up my own na

Hello again, i have one additional question. I tried to implement that solution into a bigger code. There, depending on

Hey,

I am just trying to send my robot a msg that he starts moving forward. When it comes to receiving a msg, I can use rospy.wait_for_message to be sure that one has received that one. When it comes to moving the bot around, normally that worked well with the following code:

def moving(self): 
   self.pub_cmd_vel = rospy.Publisher('cmd_vel', Twist, queue_size=5) 
   vel_cmd = Twist() 
   vel_cmd.linear.x = 0.1 
   self.pub_cmd_vel.publish(vel_cmd)

But the robot wasn´t moving. That´s why I implemented this code, which was working again:

def moving(self): 
       self.pub_cmd_vel = rospy.Publisher('cmd_vel', Twist, queue_size=5) 
       self.finish = True 
       while self.finish: 
          vel_cmd = Twist() 
          vel_cmd.linear.x = 0.1 
          self.pub_cmd_vel.publish(vel_cmd)

My question is now, why is the one option working but the other don´t.

Thanks for your help!

Hello again, i have one additional question. I tried to implement that solution into a bigger code. There, depending on