Chrimo's profile - activity

Hello community,

I've started a new ros project called MockBot at home... The robot contains the following modules:

Simple lowcost homebrew chassis, which can be build from cheap components.

http://192.166.253.145/BLOG/serendipity/uploads/MockBot-Design-Sheet.pdf

Currently the nodes for Kinect, GPS, Audio and motorcontroller are up and running.

What is the next step in ros design to make these components work together ? I'd like to create a simple discover-world or ant-brain behaviour...

Problem: what do I need to control the motors or what do I need to make the motorcontrol ros-compatible ? What can be reused from the turtlebot project ?

Current state: both motor subscribers are listening at /servo1 and /servo2 topics.

Thanks for many tips and tricks from the professionals with experience from practice Cheers Christian

I'm using binary installation

http://wiki.ros.org/indigo/Installati...

I'm using ROS INDIGO at my PI2 for some days with Ubuntu 14.04 LTS now... Try this: https://wiki.ubuntu.com/ARM/Raspberry...

I'm using http://wiki.ros.org/razor_imu_9dof with an Arduino NANO and GY-85 9DOF modul. This cheap solution (20 Euro) work within a few minutes of work.

PC---USB--->Arduino--->GY-85

Connection between Arduino NANO and GY-85:

+5V--->Vcc_in

GND--->GND

A5--->SCL

A4--->SDA

Set type SEN-10724 at razor_imu_9dof and enjoy the next steps of calibration.

Cheers Christian

how does your iCreate2 feel. I'm very interested in this device.

Succeed ?

Raspi+MPU is not well supported and slow... I's prefer Create2 + Odroid C1 and plain Ubuntu 14.04 ARM...

New Raspi2 will do the same because this new board uses ARM7 cores (4)

ROS on Raspi works - slow but it works... Wait for Raspi2-Hardware and Ubuntu 14.04 ARM.

If you have already an old Raspi with raspian installed and running, try to learn the Python programming language.

Notice: ROS is not a language - it is more like LEGO for robotics applications.

Happy robotics Christian

Hi,

try it this way from bash

https://github.com/mockbot/MockBot/bl...

You can replace static cmd_vel values by variables ($1,$2...) and customize your script .

Enjoy it :-) Christian

Hello Community,

has anyone experience with iRobot Create 2 ?

http://www.irobot.com/About-iRobot/ST...

Which lowlevel drivers are compatible with device ? Can I use turtlebot compatible parts ?

Thanks for some hints

Cheers Christian

Watch this stupid sample from the past

https://github.com/mockbot/MockBot/bl...

When launching rosserial_python I receive the following warning:

• /rosdistro: indigo
• /rosversion: 1.11.10
• /serial_node/baud: 57600
• /serial_node/port: /dev/ttyACM0

NODES / serial_node (rosserial_python/serial_node.py)

auto-starting new master process[master]: started with pid [6087] ROS_MASTER_URI=http://localhost:11311

setting /run_id to f6d85ce2-9af7-11e4-b2dc-eca86bf8a38d process[rosout-1]: started with pid [6100] started core service [/rosout] process[serial_node-2]: started with pid [6117] /opt/ros/indigo/lib/python2.7/dist-packages/rosserial_python/SerialClient.py:336: SyntaxWarning: The publisher should be created with an explicit keyword argument 'queue_size'. Please see http://wiki.ros.org/rospy/Overview/Pu... for more information. self.pub_diagnostics = rospy.Publisher('/diagnostics', diagnostic_msgs.msg.DiagnosticArray) /opt/ros/indigo/lib/python2.7/dist-packages/rosserial_python/SerialClient.py:101: SyntaxWarning: The publisher should be created with an explicit keyword argument 'queue_size'. Please see http://wiki.ros.org/rospy/Overview/Pu... for more information. self.publisher = rospy.Publisher(self.topic, self.message)

How can I fix it ?

I've tried to change my arduino code:

ros::Publisher pub("/MockBot/adc", &adc_msg, queue_size=1);

But I now the compiler throw me errors...

Where is the trick to make it work ?

Thanks in advance Christian

Hello William,

I've expected such problems ;-)

Millions thanks for the very detailed view of development problems.

Cheers Christian

Another simple usage may be: sudo brew install ros-indigo-*

Hi OSX-Users,

it's a long and upgly job to compile the ros environment for OSX.

Most users want to use ROS only and do not have the experience to setup the environment.

Why is there no easy to use DMG available for OSX-ROS-Users ?

Cheers Christian