This project is currently winding down. Please see the announcement for more information.


Motion Control in Rust

Winding Down Flott

Posted on 2021-06-02 by Hanno Braun

Instead of a monthly newsletter, here's a bit of sad news: I've decided to not continue the Flott project in its current form. Before I go into some background and the reasons that led me to this decision, here are the specific steps I plan to take next:

  1. I will move all repositories that contain useful software (so Stepper, RampMaker, and Stepper Terminal) to the Braun Embedded GitHub organization, where I will keep maintaining them indefinitely. Braun Embedded is my own business that focuses on Embedded Rust, and that GitHub organization is where I keep all my embedded-related open source repositories.
  2. I will archive the remaining repositories (the meta repository and the website repository).
  3. I will repurpose my GitHub Sponsors profile to cover my development and maintenance activities in the Embedded Rust ecosystem (which will include the then former Flott repositories).
  4. Longer-term, I will archive the website at a subdomain under my personal domain ( I do not plan to renew the domain, so eventually the website will no longer be reachable at its current location.
  5. As I already said, I will keep maintaining the former Flott repositories. I will also develop new features (and possibly create more libraries) according to my own needs. However, there are no firm plans for doing so, no timeline, and I will not go to any great lengths to make these features and libraries generally useful beyond my own requirements.

I would like to thank all my GitHub Sponsors who have supported me this far. It means a lot! A special shout out goes to Noah Hüsser who has started supporting me at the 32$ tier since I posted the last newsletter.

Okay then, now that the minutiae is out of the way, let's dive into how I came to this decision.

The Reasons I Started Flott

My work on Flott can be divided into two parts, for each of which I have separate reasons for doing them:

  1. Development of Stepper and RampMaker.
  2. Marketing those libraries under the Flott name.

I created Stepper and RampMaker because I am interested in the field of motion control, because I think these libraries enrich the Embedded Rust ecosystem in a meaningful way, and not least because I have plans for some projects that I want to use those libraries for. None of this has changed, which is why I will keep maintaining them going forward.

But why didn't I just create those libraries and leave it at that? Why did I create this website, wrote announcements and a monthly newsletter, and set up a GitHub Sponsors profile? Well, that's because I was (and, to a degree, still am) unhappy with my existing business. Because I wanted to do work that is more meaningful to me. And because I wanted that work to serve as marketing material for my existing business, helping me move the business as a whole into a more meaningful direction.

Plans Meet Reality

From the beginning, I knew that this was going to take a while, possibly years. But there is a big difference between "knowing" and "understanding". After I had launched the Flott website, the GitHub Sponsors profile, and had started marketing them, nothing happened for a while. That's when I understood what that long-term strategy meant: That I had to keep working in my existing business for likely years to come, always struggling to find enough time for Flott on the side.

This started a thought process that led me to coming up with other strategies. More incremental ways to improve my business, that are likely to start showing results much more quickly. I don't want to make this post any longer by going into what these strategies are, but the result is simply that I don't have much time left to work on Flott. There are only so many hours in a work day, and for a while now, Flott has been getting the short end of that stick.

The Simple Math

Since launching Flott to deafening silence, things have improved, a lot actually! I have sponsors now that are supporting me with 104$ per month! I consider that a great success, and I am very thankful to all of you who helped get me here.

However, while this is a non-trivial amount of money, it is only a fraction of what I need to cover my monthly costs. And even if sponsorship grows to a point where it can cover my monthly cost, there's still a long way to go until I can make a decent living, that will allow me to buy a house and save for my future.

And let's consider what it took me to get me here: 3 months of work on the side (October to December 2020), 3 months of being fully focused on Flott (January to March 2021), and another 2 months of working on Flott on the side (April 2021 until now). Most of the growth (in GitHub stars, website traffic, and most importantly sponsorship income) happened while I was fully focused on Flott. And I simply can't afford to do that for long enough to get the project to anywhere near sustainability.


Given that I can no longer afford to give Flott the time it needs to keep growing, and to give my sponsors a worthwhile return for their monthly investment in me, I have to call it quits. It's a bit sad, but that's just how it is. I considered other ways, and started talking to companies that would be in a position to sponsor Flott a few months back. But it seems to me that the kind of big professional company that would be in a position to make a dent short-term also has big professional needs that Flott simply can't meet at this stage in its development.

The fact of the matter is, there don't seem to be a whole lot of people who are clamoring for a Rust-based solution to their motion control needs. If this is wrong, I don't know where they are or how to reach them. I think that's a matter of timing. If I were in a position to stick it out for a few years, things might change. I'm not though, so I have to move on to other endeavors.

Thank you all for your interest in Flott, and thanks again to my sponsors for supporting me along the way! With your support, I managed to build Stepper and RampMaker, useful libraries that are available as open source today, for everyone to use. I wasn't able to take things further, but I think that's something.