- WLUG - wlug.mailman3.com

Robotics and linux
by Ken Jones Aug. 24, 2011

Aug. 24, 2011

Thank you, Kevin, As you can see from my video I have built a state-machine-only robot out of a radio controlled model level car and an Arduino Nano programmed in ArduinoC_0021. The idea has been to interest middle school teachers and students in 'How things work' in 2011. Education must be relevant. My cars can race each other around a room. Speed, competition and the 'real world' makes relevance. Modify the code and win the race. My project has been going on for over a year. Recently it has been struggling. After watching a video of the 2012 Lexus parallel parking itself and realizing that it is doing some mapping, I thought I would investigate 'real' robotic code. ROS was suggested, but it does not seem the right fit. Any suggestions would be appreciated. Ken Jones

2 1

ROS Robot Operating System
by Kevin Harrington NR Aug. 24, 2011

Aug. 24, 2011

A much easier to use alternative to ROS would be our platform, the DyIO and the Bowler Communication Sysrtem. We use a platform independent communication platform to turn any computer into a robot. WPI is now using these controllers as the basis for all the intro and advanced robotics engineering classes. You would write code in Java (Standard Edition), execute the application of any OS, and communicate to the DyIO for all your I/O needs. We have a ton or tutorials and HowTo's for accessing the different capabilities of the DyIO. If there was some interest i could run a seminar about making robots with Linux... -- Kevin Harrington Neuron Robotics President and Founder

1 0

Prin Software Embedded Engineer - Linux perm/direct
by John Spencer Aug. 16, 2011

Aug. 16, 2011

Our client has a need for a Prin Software Embedded Linux Engineer. Must be LOCAL (position is northwest suburb of Boston) and must have strong background working with embedded Linux. Must be US Citizen or Permanent Resident Technical Skills include: - Extensive experience designing and implementing embedded software systems from the ground up. - Strong experience with Linux - kernel, builds, patches, etc. -Expert knowledge of C required. - Ideally this candidate will have experience to lead/implement code utilizing a custom kernel - Must have knowledge of Linux for embedded systems working with bootloaders, filesystems on a flash memory system, build a root file systems, coordinate and distribute code onto multiple microcontrollers, etc. - Expert at integrating software with electronics, including writing device drivers and debugging hardware/software, using lab equipment Please reply with a copy of your resume and any questions. Your resume will never be sent anywhere without your prior approval. Regards, John Spencer Connected Systems Partners Connecting Top Talent with Top Companies 978-455-5550 x208 978-621-9743 cell jspencer(a)connectedsp.com www.connectedsp.com GET CONNECTED! All information in this email is considered confidential and intended for the view and use of the recipient(s) only.

1 0

ROS Robot Operating System
by Ken Jones Aug. 16, 2011

Aug. 16, 2011

I have designed and built a robotic 1/10 scale radio control car (See link below). I added an Arduino Nano to a HPI Sprint. I have been using Windows based Arduino C code. This package is too limiting. I am considering getting into http://www.ros.org/wiki which is LINUX based. "ROS (Robot Operating System) provides libraries and tools to help software developers create robot applications. It provides hardware abstraction, device drivers, libraries, visualizers, message-passing, package management, and more." Are any of you WLUG members ROS-ites? My Linux skills have degraded due to lack of use (and old age). Here's a pointer to a youtube showing my robocar being a robot and what it is built of. http://www.youtube.com/watch?v=J-rgkt8WDXQ Ken Jones Fitchburg

1 0

Re: [Wlug] WLUG BBQ -- Nice to see you all!
by E Johnson Aug. 11, 2011

Aug. 11, 2011

Thanks for coming, & for making the WLUG BBQ a success! We got lucky on the weather... one T-storm & then clear! Everyone was wonderful! & Thanks for helping with the aftermath. What a great group! We enjoyed it. Best regards to all, Liz J

1 0

Re: [Wlug] WLUG BBQ - UPDATE 5:35 pm
by Gregory Avedissian Aug. 10, 2011

Aug. 10, 2011

According to the radar, the storm will only last about 20 minutes, and then we'll have clear skies. Food is here, three of us are here so far. Party is ON. See you soon.

3 2

Re: [Wlug] WLUG BBQ - UPDATE 6:00 pm (almost)
by Gregory Avedissian Aug. 10, 2011

Aug. 10, 2011

Rain stopped. Sun is peeking through the clouds.

1 0

WLUG BBQ
by E Johnson Aug. 9, 2011

Aug. 9, 2011

Hi everyone, The annual WLUG BBQ is tomorrow! Time & location & contact info has already been posted on the list. We have salad, cheese & crackers, plus a few extra goodies, & the condiments. Dogs, burgers & buns are allegedly arriving. So we expect the event to be enjoyable. A few news items & reminders: 1. We have been fairly bug-free this year, which still seems to be the case. But it is raining now, so, we'll know when we now. 2. Our Driveway is for deliveries (tables/chairs, coolers, etc., but not for Event Parking. There should be adequate parking on Hudson St. If you have a special Parking need, please let me know: iris.gates(a)gmail.com 3. We do not have an icemaker. Whoever is bringing the non-BYOB drinks (the soda), please bring cooler plus ice. If you BYOB, please provide your own cooling technique (cooler & ice) 4. My apt. is on the 3rd floor, so note that the Facilities are a few steps up. 5. Someone has promised to bring a table. That would be greatly useful. Perhaps a second table, even a small card table, would be helpful. 6. BYO lawn chair. 7. Wireless will be on & accessible, but I have not tested it in backyard. 8. If it rains or hails or otherwise becomes inclement, we can adjourn to my apt. Tall people may need a hardhat, but we can cram in. 9. Arts Worcester event is going on in Elm Park lately; there are a few things to see, should anyone wish to take a short walk. Elm Park is only a few steps away. 10. Sign on light pole out front will say WLUG. A Penguin is allegedly arriving, but no clue where he will be located. ## Who is bringing plates, cups, forks & spoons? Could you please check in here before Noon Wed. (my final shopping trip)? TY. See you tomorrow! Liz J

1 0

Solved: X apps no longer work with sudo after upgrade to Squeeze
by Theodore Ruegsegger Aug. 9, 2011

Aug. 9, 2011

I could have guessed I'd find the answer just after posting, but perhaps this will make it easier for the next googler. I had written: > Summary: After upgrade from Lenny to Squeeze, I can no longer execute > X apps using sudo in an ssh session. Why not, and how can I restore > this ability? A careful reading of the manpage for the /etc/sudoers file (man 5 sudoers) yields this insight, under EXAMPLES: # Run X applications through sudo; HOME is used to find the # .Xauthority file. Note that other programs use HOME to find # configuration files and this may lead to privilege escalation! Defaults env_keep += "DISPLAY HOME" It looks like the newer version of sudo no longer preserves $HOME by default (although, the above notwithstanding, it does keep $DISPLAY). Adding the following line to my /etc/sudoers restored my ability to run X apps via sudo: Defaults env_keep += "HOME" Hope someone else finds this helpful. Ted Ruegsegger

3 6

Re: [Wlug] Reminder: WLUG BBQ: Wednesday, August 10, 6pm
by Chuck Anderson Aug. 7, 2011

Aug. 7, 2011

I have the giant Tux, originally made by Doug Waud. In-Reply-To: <CABmZTj1nKqQebf74eQjoLPGC5ZctSOkoAco1YrvzSJTNi-miZw(a)mail.gmail.com> On Sat, Aug 06, 2011 at 08:01:45PM -0400, E Johnson wrote: > All of the above is correct, except I do not have a Tux Penguin. > A sign affixed to the light pole out front will say 'WLUG' & I will attempt > to draw an image of a Tux-like penguin on it. > > Everyone is welcome. See you then. > Liz J > > On 5 August 2011 22:57, Chuck Anderson <cra(a)wpi.edu> wrote: > > > Hi gang, > > > > The WLUG BBQ is coming up next week, Wednesday, August 10, starting at > > 6pm. Thanks to those who volunteered to bring items, and thanks to > > our hostess Liz Johnson. We'll have hot dogs, burgers, bratwurst, all > > the fixings, some chips/snacks, salad and soda. The grill will be > > fired up if anyone has something else they'd like to grill, and > > desserts would be welcome as well. There will be a cooler or two and > > some ice for BYOB. People should bring a lawn chair for themselves if > > they wish to sit down. Based on past BBQ's, I'm expecting about 15-20 > > people, perhaps more. > > > > The address: > > > > 34 Hudson St, Worcester, MA (It is a green house, one house south of > > Elm St. Elm St runs east/west along Elm Park and Hudson St is one > > block east of Park Ave.) > > > > Look for a "WLUG" sign on the city light pole, as well as a big Tux > > Penguin. If you get lost you can call Liz at 508-471-4407. > > > > Hope to see you there! > > Chuck > > WLUG President

1 0