We use Zulip (https://zulip.org/) for our corporate chat, and we've never looked back. It's been good, and it's fully open source. We self-host, but paid hosting is easy to get too if you want.
Wow. This project was the cause of a very long and intense discussion about mis-use of the term "open source". See https://github.com/n8n-io/n8n/issues/40#issuecomment-5397146... for details (lands mid-thread -- you might want to scroll back to see the start, and if you read the whole thing to the end then you deserve some sort of award!).
TL;DR: The author originally tried to call n8n "open source" but while using a non-open-source license. After much discussion, he kept the license but stopped using the label "open source", to the relief of many people.
That half-decade-old thread is still what I point to when I want to explain to someone why preserving the specificity of the term "open source" matters.
Most of the comments so far are about the temperature and the closeness to the sun, and, hey, I get it: those are both amazing to think about. But to me even more amazing is... 0.16% of the speed of light?? Yikes.
That part about "...you wouldn’t want to wing it with the configuration, because allegedly you could break your monitor with a bad Monitor setting" -- strike the "allegedly"! Or at least, let me allege it from personal experience: I did that to one monitor, in the early 1990s. You could smell the fried electronics from across the room.
AHHHH, that's the key thing I didn't know (I have a Raspberry Pi sitting in a drawer and have played with it embarrassingly little -- I didn't realize how important having the SPI or other special interface is in this context). Thank you again.
Thank you. My idea was more the opposite: do it with a normal laptop or desktop computer driving the display, rather than a tiny microcontroller. I guess I'm assuming that either the display's USB input supplies enough voltage to run the display, or that the display has a separate power supply -- i.e., that there's nothing magical about a Raspberry Pi that makes it supply special bits or special voltages to these displays that can't be supplied by, say, my desktop computer.
Does anyone know why projects like this always seem to specify using a particular type of tiny, low-power computer (usually a Raspberry Pi or something similar) to drive the display?
I already have plenty of non-tiny computers that run Debian GNU/Linux. Suppose I wanted to run an e-paper display from one of those computers, using this code, just via a normal USB cable. I could do that, right? There's no reason I would have to use a Raspberry Pi or something similar?
The most important factor in my learning Emacs was doing it in a room with experienced Emacs users. I really strongly recommend doing this if you possibly can. A few minutes of an experienced user shoulder-surfing while I worked, and giving advice on better ways to do things, was worth hours of self-directed study.
Get together with experienced users in person and have them watch you edit. That's it.