Robotics and ROS 2 Essentials

Post by doganulus » Mon, Jan 20, 2025, 6:49 PM UTC

esteve wrote: post #92

doganulus wrote: post #90

Earlier quoted context omitted.

Groupthink is what happens when people don't share their dissenting views, so the group as a whole makes poor decisions. This is why it is a bad idea to silence dissent. This defines the ROS community, as you have exemplified. So it is good that you come and read the comments here. Welcome!

Many people in that thread you linked to have criticized ROS and explained the issues they have with the build system, some even proposed improvements, but somehow you're the only one that had to have their permissions restricted because of your behavior. And that's after repeatedly breaking the code of conduct for years. I've yet to see any technical contribution from you in ROS or any other project. You don't know…

Post by margalabargala » Mon, Jan 20, 2025, 11:20 PM UTC

dtquad wrote: post #100

margalabargala wrote: post #8

While it's used in industry sometimes, ROS is really one of those by-and-for-academia tools. There's a reason it's near-universally reviled, and why "migrate off of ROS" is a standing goal at a lot of robotics companies. There's also a reason why it's a standing goal, rather than a completed goal. It does little or nothing really well, but it does everything kind of okay. There's a lot of "alternatives", most of whic…

Which would you choose to do real-time robotics with C++ on Linux/PREEMPT_RT with CUDA support?

Post by f1shy » Tue, Jan 21, 2025, 7:50 AM UTC

ModernMech wrote: post #93

f1shy wrote: post #72

Earlier quoted context omitted.

About the theory, you can learn yourself (I think) about practice, well, you may learn 1 or 2 platforms, but not all. If you get a job, you will for sure have to learn a lot from the platform they use, but much more of the application they do. Also the platforms get obsolete fast… What about buy 2nd hand/use/resell some hardware? I do not know how much cost a Ms in CMU, but sure does bot even compare to 20k. Sorry ma…

That’s $20k for one robot. If you want exposure to the breadth of hardware a ME at CMU would bring, you’d need access to the facilities as well. Robotics takes space most people don’t have.

Post by anymouse123456 » Wed, Jan 22, 2025, 1:23 PM UTC

rcxdude wrote: post #86

anymouse123456 wrote: post #69

We have a handful of devices built on STM32, RP2040, RP2350, RP Pico and RP Pico-W running bare metal firmware and green threads for task management. These were generally designed to communicate over UART (to a physically-connected host) or a LAN (wired or wireless) using MQTT topics and plain text message formats. We have a primary, core machine built around Linux SOMs like NVidia's Orin or the RPI5, which could run…

The one over-arching issue I'd point to is that network pub-sub is the way to connect different parts of your system in ROS, and that's a bad default, and an even worse single option. For most data-flow, you probably don't want to be hitting a serialisation step at all, but if you do, you probably want to be thinking carefully at the system level about how to move it around (how much data, what latency, from what kin…