Praseen's profile - activity

Hello, I have a ROS Groovy Galapagos bare bones installation from binary on the Raspberry Pi which has a Raspbian wheezy running on it. Please let know how to use it for some simple hardware like a switch and an LED connected to to the RPi. I would like the switch to switch on/off the LED through the ROS installation on the RPi.

Thanks in advance, Praseen

will update after I try it

yes I am currently launching roscore as root manually. I have installed ROS as root on this system.

Hi guys, I have got a basic ROS running on a some hardware successfully, thanks to helpful pointers from this community (love you guys for that). Right now I am facing another seemingly difficult issue. I am trying to get the roscore process to autostart at boot so that I can get my robot to move about freely in the room. I have tried updating rc.local, crontab, and init.d update and also the autologin script. All of them fail to work. I am using Raspberry Pi hardware with raspbian wheezy linux and I need to start roscore as root on this hardware at boot up automatically. Please guide me towards accomplishing this.

Thanks and Regards to all, Praseen

Hi William, thank you for your response. I am installing from source so that I will be able to modify the existing source and I can hopefully use this experience to get this working on the Raspberry Pi board on which I am working.

The wiki needs to be updated please. The command catkin_make_isolated works, but it builds all the packages in the catkin workspace and can take some time. Thanks a lot all, especially joq, for the response and support

Hi joq, Thanks a ton for your response. Well I have two work spaces, one for catkin packages and the other for non-catkin packages. This file structure was created by Groovy itself. Please let me know how to proceed.

Hi, I am working for sometime now (around 4 weeks) to try and port ROS onto a robot we have built using the Raspberry Pi as the main controller. This Robot has a variety of peripherals on it like a USB camera , Wifi Router, etc. All the peripherals are connected to the RPi (main controller) using I2C connectors. I am attempting to port the ROS onto this custom built robot. All the drivers for this robot are functional as such. But how do I get the robot vehicle to run ROS. Please let me know of some effective starting point/ link. I know that in this forum many have already done what I intend to do, please help me to get started in the right direction. Until now I have got ROS installed on my Ubuntu 12.04 laptop and onto an RPi board. I am currently working on the ROS basics tutorial, however it does'nt seem to cover, how to port ROS onto a custom built autonomous robot.

As part of this porting procedure, I feel that I need to do this step by step, as a result I am trying to first get ROS on the RPi working between a switch and an LED as a publisher/subscriber. I am not sure, how I need to go about doing this. Please let me know if my approach to solve the porting problem is correct too.

Hi dornhege, I am building this system as part of a building block for a robot, that is the reason why I wanted to use an I2C interface. However right now I am happy to just use some GPIOs to connect the LED and switch to the RPi. I would eventually want to use an I2C connector later.

Hi dornhege, I would be indebted, if it would be possible to let me know of a step by step procedure or a link containing an example solution for such a problem? So in this case the thread which you talk of should be used to implement an I2C send/receive?

Hello, I have a ROS Groovy Galapagos bare bones installation from binary on the Raspberry Pi which has a Raspbian wheezy running on it. I intend to first connect an LED via an I2C connector to the Raspberry Pi, after this I intend to connect a simple switch via an I2C connector to the Raspberry Pi. How do I configure The ROS middleware installed on the Raspberry Pi to accept commands like ON/OFF from the switch and then convey it to the LED?. I am a beginner in ROS, with my limited understanding I believe I would need to make both the hardware switch and LED as nodes in ROS and the node for the LED as a subscriber and the node for the switch as a publisher. Please let know if I am wrong, else how can I go about doing what I require?

Thanks in advance, Praseen

Hi dornhege, How do I go about creating the ROS node required Which part of the tutorial tells how to create a node? I am working on the Basic Tutorial now. As mentioned in the question I also have an I2C connector connecting the Rasberry Pi and the switches and the LED. Will that make a difference?