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**Autumn Nash:** That's how my son's printer -- well, he has a toy box, so it's meant for little kids to use with their iPads, so in a way it kind of monitors, but it kind of makes it limited what you can do with it, because it comes with its own software, and everything. |
**Justin Garrison:** Yeah, I switched off from Ender Pro to a Bambu. And the Bambu is pretty much self-contained... |
**Gina Häußge:** Closed source? |
**Justin Garrison:** Yeah, closed source... And I had such a hard time, because I had so many printers in the past that I always wanted them to be open source, and I wanted them to work certain ways, and I always spent more time fiddling with them than using them in printing... And so I saw recommendations for the Bamb... |
**Gina Häußge:** There's good news for you, though. Someone wrote a plugin that allows Bamboo printers to work with OctoPrint. |
**Justin Garrison:** Really? |
**Autumn Nash:** Oh, that's awesome! |
**Gina Häußge:** Really. |
**Autumn Nash:** I really want a Bamboo. So that's why I'm just like... |
**Gina Häußge:** I'm not sure if it works with all of the models and such, but it's THE plugin developer, basically, on OctoPrint. He's the one with the many plugins. |
**Autumn Nash:** I keep watching everyone's videos on Twitter and like TikTok, and I want a Bamboo so bad, but I'm like -- I don't want to get locked into the software. Yeah. |
**Gina Häußge:** I'm not touching that with a 10-foot pole. I saw one in-person with a buddy, and mechanically, I was very, very impressed, but then also this news hit recently - well, not recently; that's almost been a year now also, I think... Where they had this funny security issue where some printers suddenly fetc... |
**Autumn Nash:** I did not hear about that. |
**Gina Häußge:** Yeah, and if stuff like this happens, then this is a big, big no for me. And also the part with all of what 3D printing is these days, what 3D printing has come to over the last 10 years - that was done on the shoulder of open source. And now all of these companies - it's not just Bamboo, it's a bunch ... |
**Autumn Nash:** I think open source as a whole, like databases, everything has gotten really weird with where do we go from here, with having companies in open source stuff... |
**Justin Garrison:** License changes... |
**Autumn Nash:** Yeah. It's been very interesting. |
**Justin Garrison:** Now, back to OctoPrint for a bit... I saw you had a release last week. What does that release process look like? Because you have this huge system that supports all of these printers, and you have these plugins, and all of these features... How do you actually go about releasing and testing that, t... |
**Gina Häußge:** \[15:51\] So it should be obvious that it's pretty much impossible to test every possible printer, firmware, plugin, operation system, starting state of software situation. So what I do before I actually roll out the full release is there goes a long, long phase of release candidates. And OctoPrint has... |
But the idea behind that is that if I have something like 1,000-2,000 people out there testing a release candidate and putting it through several years of print duration over the course of the release candidate phase, and then I can be pretty sure that a lot of these combinations that I would never be able to test have... |
And of course, after I've pushed out a stable release -- so the current stable version is 1.10, but we are now already at one point 1.10.1. So there are bug fix releases that I also push out. Those do not go through a full release candidate phase, again, but they only get bug fixes and maybe small minor improvements of... |
And what I do for every single release is -- so OctoPrint can basically run anywhere where you can run Python. But most people run it on a Raspberry Pi, so that is also what I concentrate on for testing. And there is this dedicated image that someone else is maintaining, Guy Sheffer, for OctoPrint, which is called Octo... |
So what I have here is I built myself a little test rig that has three Raspberry Pi threes, which is the current basic option that I suggest... So get the three, because that basically is the best thing that you can get, the lowest supported version. And if you want something with more power, then of course you can get... |
So I have three Raspberry Pi threes there, and all of these have a little card adapter in there that can be switched through USB, either to act as a mass storage device through a host, on the one end, or as an SD card on the other hand. So that is slotted into the SD card slot of each of the Raspberry Pi's, and all of ... |
**Justin Garrison:** Well that's what I've been doing. No, this sounds fascinating. I don't even know you could have like an SD card on one hand, and it's like connected to the USB on the other side, and you can switch it back and forth. |
**Gina Häußge:** Yeah, one of these things costs me $100, but they exist, and... Yeah, a little -- |
**Autumn Nash:** \[20:02\] Hey, sometimes that $100 is worth it. |
**Justin Garrison:** Yeah. It saves how much time...? |
**Gina Häußge:** Yeah, I mean, I have three. That was really worth the money that I spent on that, because what I do on every release is basically I flesh a whole bunch of starting versions on the Raspberry Pi's. Like OctoPi version x with OctoPrint version y. And then I look if I can upgrade to the release to be from ... |
And so before every release, I have this huge checklist in my tooling, and go through all that... And of course, the usual stuff, like create new tags, create a change log, make sure the translation is up to date, the German one - this is the only one that I maintain. Everything else needs to be supplied by people who ... |
And then there's also always a whole test matrix that I write down in JSON, that gets rendered into a little table, and that then tells me exactly what command line I have to enter into my scripting, so that all of this will be done. Then I wait, then a browser window pops up, then I click "Update", then I look if ever... |
**Justin Garrison:** Wow. That's cool. |
**Autumn Nash:** Your automation is very impressive. |
**Gina Häußge:** It saves me so much time. Every single release, I'm sitting here and I have this huge smile, because that saved me so much time. Yeah, and I also have a blog post about this test rig... |
**Justin Garrison:** Does it have pictures? |
**Gina Häußge:** It has pictures. |
**Justin Garrison:** I need to find that, so we can add it. |
**Gina Häußge:** I can drop you the link, and you can put it in the show notes. |
**Justin Garrison:** Yeah. |
**Gina Häußge:** And what happens then is at some point I'm through all of this, and then I'm happy, and stuff, and then I do the regular release thing. So I just click on Release on the GitHub release, I have already filled in the change log on all of that... And what now happens is a whole workflow runs through GitHu... |
**Autumn Nash:** This is like the software engineer's dream. You've found something that you're interested in. You've built it over like Christmas break, and then you solved this awesome problem, and then you automated it and solved all these problems to make it efficient. It's so cool. I'm so impressed. |
**Justin Garrison:** How many core maintainers are on OctaPrint? Is it just you? |
**Gina Häußge:** It's just me. |
**Justin Garrison:** What software were you writing before OctoPrint? |
**Gina Häußge:** Enterprise Java stuff? |
**Justin Garrison:** There you go. So you went Java to Python, basically. |
**Gina Häußge:** \[24:00\] Yeah. Python was self-taught. I started when I was -- yeah, my career was a bit weird. I started actually working at university because I wanted to do a PhD... And I worked at university -- so in Germany it's like you have some work, either you are teaching or you are doing something administ... |
And then at some point I decided "Yeah, okay, so the PhD thing isn't happening. I'm not getting really enough time to work on that." And to be honest, I was more drawn to doing something, like really with my hands, and not just writing stuff, and having students do the stuff with their hands. So I ended up as a softwar... |
**Autumn Nash:** That's so cool. |
**Justin Garrison:** And you said you've been crowdfunded for eight years now... |
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