cerebraldad's profile - activity

I'm remote to my master_uri; ie http://somedns:11311

I can listen and publish to topics from the master, but I'm unable to list topics in Rviz or Gazebo. I can get it to work over my local network by exporting the local ip of the master to ROS_IP, but i cant resolve the dns server. any suggestions?

Thanks

Thank you. The image is being supplied in the call - I double checked the path is valid. I am not running a package but

Yet another - Invoking "make -j2 -l2" failed - no other answers helped. Base path: /home/kbrown/util_ws Source space: /h

use another opencv I'm working on my own custom opencv script and when I try to execute some methods i get the error:

use another opencv I'm working on my own custom opencv script and when I try to execute some methods i get the error:

use another opencv I'm working on my own custom opencv script and when I try to execute some methods i get the error:

use another opencv I'm working on my own custom opencv script and when I try to execute some methods i get the error:

Thanks in advance for you help guys.

I've been fiddling with ROS for quite a few months now and I have a good basic understanding of how to advertise and subscribe to nodes, I even built a speech action!

I am, however, very confused on how to translate Twist messages into movement on an actual robot. In the Sim, robots just magically move :)

My plan is to use an arduino to send signals to a Sabertooth 2x25 which has the ability to accept analog linear (0V-5V), Servo signal (1000us-2000us), Simplified Serial (1-255 and some combination controls both motors) and Serial at 38400 baud - which i completely don't understand...

My understanding is the Twist msg contains linear and angular values for all 3 axis and in order to use these some trig. calculations - in some relation to the wheel base width - will allow the robot move using the left and right motors independently. I dont understand the math here...

I currently have a sketch that takes the "cmd_vel" topic and maps a value (-1 to 1) to (0 to 180) from "linear.x" to move a servo using a node that publishes from the keyboard.

I need some direction, because I want to use a Twist topic for both autonomous movement and remote teleop (rc transmitter) input.

I found the "differential drive", "simple drive" and a few other packages - but I fail to see how they help since they publish to a twist topic and I cant seem to find any documentation on how to utilize these messages.

Does anyone have a secret decoder ring?

Thank you, Keith

Can anyone direct me to a tutorial on how to use a package i find in a search.

Say i find a package or library using the ros wiki - how do I use it or implement it?

Thanks for your patience, I'm just getting started.

do you know of any api that would convert to a pgm file?

Is it possible to make a bag file or a mapping file from a cad or bim file? I have a revit CAD file and an AUTOCAD file

you said rosnode above. I'm confused.

@ChriMo I'm a little confused how to set this up. where do you get your variables and inputs such as ATTRS{serial}

@PeteBlackerThe3rd rosnode info /usb_cam shows no subscribers: Subscriptions: None but /darknet_ros shows /usb_cam/image

@PeteBlackerThe3rd rosnode info /usb_cam shows no subscribers: Subscriptions: None

How do you config Darknet_Ros (yolo) to see a camera topic? I have yolo running on a server and the robot publishing a u

I will definitely set that up - see i learned something new....

Im using a Razor 9dof IMU with a (usb)serial connection on port ttyAMC0 and I have an Arduino on the same port publishing encoder and odom messages.

I recently added the IMU, but cant get them to play nicely together. Any suggestions?

<node pkg="rosserial_python" type="serial_node.py" name="serial_node">
   <param name="port" value="/dev/ttyACM0"/>
   <param name="baud" value="57600"/>
</node>

You are right. The arduino was/is on ttyACM1 but i never changed the launch file. I am an idiot and when i was debugging

How do I stop RosSerial from causing the boot of my IMU top fail? Im using a Razor 9dof IMU with a (usb)serial connectio

How do I stop RosSerial from causing the boot of my IMU top fail? Im using a Razor 9dof IMU with a (usb)serial connectio