Kirill_Sokolov's profile - activity

I added output rosnode list and output rosnode info /qrcode_detection_kinect. But how we can see the node is runnig, but it doesn't have any subscribers or publisher.

I edited question with outputs. I hope it helps. Honestly I don't know a lot about nodelets, but I'll of course read about it.

I can't to start work with hector_qrcode_detection. I edited this launch file I only change this sector

<remap from="openni/image"             to="/image_raw" />
<remap from="openni/image_percept"     to="worldmodel/image_percept" />
<remap from="openni/image/qrcode"      to="image/qrcode" />
<remap from="openni/image/camera_info" to="/camera_info" />

Because I use uvc_camera for testing, but I going to use this package with kinect. So when I start this launch file, I didn't see that any topic supsribes to image_raw. Where is problem? What I'm doing wrong?

rostopic info /image_raw

Type: sensor_msgs/Image

Publishers: 
 * /uvc_camera (http://turtle-comp:34051/)

Subscribers: None

rostopic list | grep image

/image_raw
/image_raw/compressed
/image_raw/compressed/parameter_descriptions
/image_raw/compressed/parameter_updates
/image_raw/compressedDepth
/image_raw/compressedDepth/parameter_descriptions
/image_raw/compressedDepth/parameter_updates
/image_raw/theora
/image_raw/theora/parameter_descriptions
/image_raw/theora/parameter_updates

rosnode list

/qrcode_detection_kinect
/qrcode_detection_pseye_left
/qrcode_detection_pseye_right
/rosout
/uvc_camera

rosnode info /qrcode_detection_kinect

Node [/qrcode_detection_]
Publications: None

Subscriptions: None

Services: None

Hello, I have some issue with this package. I change in a launch file

<remap from="image" to="camera/rgb/image_raw" />

to

<remap from="image" to="/image_raw" />

where /image_raw my camera topic. But nodes only starts and in rostopic list i don't see any topics, and of course nothing publishing. Where is a problem? Please help, or you can to advise to me another qr code detection package?

Hi, I have a "checkpoint" and several numbered "stations". At the checkpoint turtlebot have to scan nameplate with one-digit number. Determine what it is and go to station with this number. And repeat. So, I guess this is done in the following way...

Preparation: In the teleop mode (in future of course autonomous way better) the robot explore a room: build a map, find "stations" and remember station's coordinates.

Execute: Go to the checkpoint coordinates, find and scan number, realize what station we need and go to this station coordinates.

Questions: How to remember station's coordinates, and where to store it? How to associate a picture with the number and the desired station?

Thanks, it can help me

Hi, I start to learn ros and have the turtlebot. I did all tutorials and don't know how to go on. I have an assignment - turtlebot have to scan a figure from paper and after it must search the figure in the room, move to this figure and stop nearly.

As I understand, turtlebot have a ready base controller, navigation, odomentry and so on, I don't need creating it myself, in bringup minimal I saw this packages and used. But I don't understand how to use it separately, and I couldn't find their sources. Personally, I think to write node for global control, but also can't figure out what topics I need publish, subscribre, what services i need, what I must to write myself and what I can use ready-prepared?

I hope my questions is clear, if not asking please.

I think I do not need to use this stack, because it is realy dificult for me now=)

O good, it is what I need, thanks Martin=). So at node "driver" i have only implementation of the protocol modbus. And so turtlebot_teleop publishing messages of type Twist?

Hi, I'm beginner in ROS, and don't know where to start my task. I'm studied beginner tutorials and want to build robot. My robot is tricycle with two drive wheels and one slave respectively. Drivers are control by two servo, and servo must controled by ROS via modbus protocol. For a start I want moving it (forward, backward, left, right) from keyboard. And dont know what nodes me need.