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2013-07-10 15:20:46 -0600 commented question rosserial_arduino works at 57600, but not at 9600

I'm sending turtlesim/Velocity which is just a pair of float32s, so I don't expect a lot of bandwidth to be necessary. Moreover, during testing I'm generating them manually at a low rate.

2013-07-09 20:44:08 -0600 asked a question rosserial_arduino works at 57600, but not at 9600

Hi,

I have an arduino sketch using rosserial_ardiuno that works OK using the default speed of 57600 baud over USB cable. I'd like to run the serial over an XBee link which, at present, is 9600 baud.

I know it should be possible to get the XBee running faster, but as a first test, I tried to run the sketch and serial_node.py at 9600. Sometimes, I can get it to run for 5-10 seconds and I know the commands are accepted because I can see the arduino-driven servos responding correctly. But ultimately, the Arduino's LED comes on and commands are no longer accepted.

I've gone over the code but can't figure out what the LED signifies. Presumably something is turning it on to signal a fatal error, but I can't find the code. Help!

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2013-06-10 18:08:02 -0600 commented answer tutorial turtlebot-simulator-desktop broken

Where did I find this tutorial? I started at the beginning of the tutorials and ran through all the Beginner Tutorials, ending with #20: "Where Next?" (http://www.ros.org/wiki/ROS/Tutorials/WhereNext). Part 1.1 includes links to the PR2 Simulator and the Turtlebot Simulator.

2013-06-09 19:24:38 -0600 asked a question tutorial turtlebot-simulator-desktop broken

Hi,

I've successfully installed "ROS Groovy" on "Ubuntu Precise". I'm following the tutorials -- which are very helpful, by the way! -- but I got stuck at turtlebot_simulator / Tutorials / Installing TurtleBot Simulator

Not a link to avoid the karma censors:
www DOT ros DOT org /wiki/turtlebot_simulator/Tutorials/Installing%20TurtleBot%20Simulator

Step 2.4 says to install some software: "apt-get install ros-electric-turtlebot-simulator-desktop", but that package does not exist. Indeed, "apt-cache search" finds only one package with "turtlebot-simulator" in the name: ros-fuerte-turtlebot-simulator

But I'm running "groovy". Is it advisable to install something containg "fuerte" in the package name?

Continuing on to the next tutorial part

www DOT ros DOT org/wiki/turtlebot_simulator/Tutorials/Running%20the%20Simulator

Step 2 is to launch the simulation. I do have package "ros-groovy-simulator-gazebo" installed, but the command fails:

$ roslaunch turtlebot_gazebo turtlebot_empty_world.launch
[turtlebot_gazebo] is not a package or launch file name

What are the packages / commands appropriate for "ROS Groovy"?

Thanks, -Steve