The Robotis TurtleBot3

[KurtEck]

I am having fun with it. Lately been doing more with the underlying board (OpenCR). I will get back to doing main turtle stuff soon.

You can obviously do it either way. It is sort of nice having a setup that has other users and a set of developers who are able to answer questions.

[LloydF]

Just a thought but, getting ROS and a turtlebot up and running with a book that covers you're platform, and written very well, is a
amazing deal. It's the documentation that I like to read over and over until I get it.

[KurtEck]

Just a thought but, getting ROS and a turtlebot up and running with a book that covers you're platform, and written very well, is a
amazing deal. It's the documentation that I like to read over and over until I get it.

And thought I would mention, they also have created a new online ROS course for beginners:

https://community.robotsource.org/t/...-handbook/1454
And also mentioned up at:
https://discourse.ros.org/t/new-ros-...-beginner/5320

I will probably soon start playing through this course... Just finished updating their boards SPI and Wire libraries.... Now need to reassemble Turtle... But first work on water system

[TXBDan]

Ah that's great. I think i'm going to get my hexapod until its "final" configuration, then check this out. Thanks

[LloydF]

Looks like ROBOTIS has a new disk image for the TB3 out and, a firmware update to (v1.2.1)

[KurtEck]

Thought I would mention, that ROBOTIS has been busy with the TB3.

Right now I am going to try using an RPI3+ as I fried the UP board I had on it... Something about supplying 12v to the Expansion connector pins, it did not like I plugged the power pins into wrong connector on OpenCR3 board... I have another UP board I will probably use again soon.

But thought I might take this opportunity to try moving over to ROS2, as this appears to be the direction that Robotis is taking, plus the underlying ROS2 communications is setup to use standardized and more secure communications, which will be supported on Linux as well as Windows and MAC.

There is more information talking about running the Turtlebot3 using ROS2 up at:
https://discourse.ros.org/t/tb3-intr...tutorials/5959

And the Turtlebot3 E-Manual has a section on it: http://emanual.robotis.com/docs/en/p...ications/#ros2


Assuming I actually get comfortable with ROS2, maybe over time it would be fun to make a version of ROS Hexapod code base that uses ROS2, plus uses the OpenCR to control a lot of the functionality, in much the way that it does for the Turtlebot3...
As I mentioned on the thread: http://forums.trossenrobotics.com/sh...4287#post94287 I have my MK3 PhantomX working with an OpenCR board.

[LloydF]

This is my Burger now with voice and vision

I found this: RASPIAUDIO.COM Stereo onboard speaker with Sound Card (AUDIO+SPEAKER) for Raspberry Pi Zero/Pi3/PI3B/PI3B+/Pi2/ with Better quality than a USB device, on amazon that really works well as a hat that does not take up much space and works well , yea!
Merry Christmas all! (Note! This model is out of Production now)

[LloydF]

I printed out and put the tire and caster configuration from the turtlebot3 friends Carrier, onto my tb3 to see if it would help with getting up onto carpets. It worked and works, giving me just enough clearance and traction to go places like the living room rug, yea!

[LloydF]

I have had issues with rubber products and the dry hot air of Arizona ( just nasty to most plastic's). Anyhow when I printed
out these wheels they have three groves in them that are exactly the size of screen door spline, as i had just replace my screens I had
some extra and holy cow they fit perfectly. So using a rc race car trick i glued them on and presto.
(Note this does mess with the odometer settings as we be trucking now )

[LloydF]

I noticed that most, if not all the TB3 files are now on ROS Melodic Ubuntu 18.04
Has anyone tried running the TB3 on Ubuntu 18.04 yet?
I have this new SBC the Jetson NANO. I configured it to boot off of a USB 500GB Drive,
and it would be the cats meow for development with a TB3.
I did notice the only dependencies still missing are the gmapping and interactive-markers packages.
I will keep my eyes out for them.
(Note. This is the article I used to set up the SBC, and it worked perfectly)
https://syonyk.blogspot.com/2019/04/nvidia-jetson-nano-desktop-use-kernel-builds.html