[00:00.000 --> 00:11.000]  So, last 10 seconds to leave the room, if no, you're staying towards the end of the
[00:11.000 --> 00:12.000]  lighting talks.
[00:12.000 --> 00:24.720]  One, two, three, four, five, six, seven, eight, nine, ten.
[00:24.720 --> 00:27.920]  And we are starting the next lighting talk by Leon.
[00:27.920 --> 00:30.720]  Thank you very much for joining.
[00:30.720 --> 00:31.720]  It's not the end of the world.
[00:31.720 --> 00:37.240]  It's just a lighting talk about, oh, is it?
[00:37.240 --> 00:38.240]  That's working?
[00:38.240 --> 00:39.740]  Kind of.
[00:39.740 --> 00:40.740]  Is it working?
[00:40.740 --> 00:41.740]  Yeah.
[00:41.740 --> 00:42.740]  All right.
[00:42.740 --> 00:43.740]  It's a little bit broken.
[00:43.740 --> 00:44.740]  So, it's not the end of the world.
[00:44.740 --> 00:51.640]  It's just a lighting talk about Wayland, Weston, the Yocto project, and RDP.
[00:51.640 --> 00:55.520]  So, Wayland is a display protocol.
[00:55.520 --> 01:02.360]  It was started like 15 years ago with the idea to replace X11, and it's slowly getting
[01:02.360 --> 01:03.360]  there.
[01:03.360 --> 01:07.520]  How many of you are using Wayland on your desktop computers or trying to use it?
[01:07.520 --> 01:08.920]  All right.
[01:08.920 --> 01:11.680]  Pretty much all of us, all right.
[01:11.680 --> 01:12.680]  We're trying, right?
[01:12.680 --> 01:16.480]  I'm not a Wayland, neither a Western developer, but I'm a user.
[01:16.480 --> 01:19.480]  Actually, I'm a contributor to the Yocto project and open embedded.
[01:19.480 --> 01:25.600]  So here I'm sharing ups and downs of the integration of RDP.
[01:25.600 --> 01:30.200]  So Western is just one of the compositors for Wayland.
[01:30.200 --> 01:33.640]  There are so many different compositors.
[01:33.640 --> 01:39.120]  Probably Western is not the best one of them, actually, but for embedded systems, it's actually
[01:39.120 --> 01:45.360]  sometimes pretty useful because it's small and simple.
[01:45.360 --> 01:52.800]  And there are options how to share your screen when you're running Wayland and Western.
[01:52.800 --> 01:58.520]  And there is this protocol, which is RDP, which stands for Remote Desktop Protocol.
[01:58.520 --> 02:00.480]  It's an alternative to VNC.
[02:00.480 --> 02:03.640]  Basically, you are doing remote screen sharing with it.
[02:03.640 --> 02:09.440]  There are some ups and downs, like it's proprietary protocol.
[02:09.440 --> 02:12.600]  The ups is that it's actually a semantic protocol.
[02:12.600 --> 02:19.120]  So you are sharing the fonts, the controls, all that kind of stuff with RDP.
[02:19.120 --> 02:26.080]  And the good thing about RDP is that you actually have an implementation for it in Western,
[02:26.080 --> 02:29.400]  the reference compositor of Wayland.
[02:29.400 --> 02:36.400]  So keep in mind that if you come into a situation where you're working on an embedded device,
[02:36.400 --> 02:41.560]  you have Wayland, you're using Western, and one moment you want to share screen for one
[02:41.560 --> 02:48.320]  reason or another, you can use RDP as an alternative of VNC.
[02:48.320 --> 02:53.040]  So you might have heard about the Yocto project.
[02:53.040 --> 03:00.560]  If you attended some of the other talks earlier today, they're quite famous because they make
[03:00.560 --> 03:03.400]  really good Hooties that you can order online.
[03:03.400 --> 03:07.200]  But the Yocto project is not just about hooties and t-shirts.
[03:07.200 --> 03:12.200]  It's a collaborative project of the Linux Foundation for building a custom embedded Linux distribution
[03:12.200 --> 03:20.680]  that is using the open embedded build framework and a tool for building images called BitBake.
[03:20.680 --> 03:26.960]  The Yocto project comes with a reference Linux distribution, which is called Pocky.
[03:26.960 --> 03:33.720]  So basically this is a way how you can get started relatively easy with some images that
[03:33.720 --> 03:39.280]  are out there, and you can pretty much build them out of the box if you have the right
[03:39.280 --> 03:43.920]  BSP for the hardware that you're touching.
[03:43.920 --> 03:49.440]  So I said relatively easy, but I have to say that the truth is the Yocto project has a
[03:49.440 --> 03:51.000]  steep learning curve.
[03:51.000 --> 03:55.840]  It has an amazing flexibility, but it takes some time to learn it.
[03:55.840 --> 04:02.600]  And it has releases twice per year, and nowadays there is a long term support release.
[04:02.600 --> 04:05.640]  So here's an example for the releases.
[04:05.640 --> 04:09.840]  This is the release that is going to be released in April.
[04:09.840 --> 04:13.840]  And we have Kirkstone, which is an LTS release.
[04:13.840 --> 04:17.200]  And we have Dunfa, which is also a long term release.
[04:17.200 --> 04:24.160]  It was released almost three years ago, and it will be supported for a year more.
[04:24.160 --> 04:28.920]  So keep in mind that, especially in the terms of the things that we're talking here about
[04:28.920 --> 04:35.080]  Wayland and Weston and the BSPs, there are different versions of Wayland and Weston depending
[04:35.080 --> 04:40.120]  on your BSP, but also on the Yocto release that you are using.
[04:40.120 --> 04:46.200]  So you might end up in this situation where a feature is missing from Weston because you
[04:46.200 --> 04:52.360]  are using an older version of Weston, and you are using this older version of Weston
[04:52.360 --> 04:56.920]  because you are using an older release of Yocto.
[04:56.920 --> 05:04.680]  So my personal recommendation is that if you are not sure, and if you can make a choice,
[05:04.680 --> 05:08.160]  go for the latest and greatest long term support release.
[05:08.160 --> 05:11.800]  But of course, that's not always true, it depends.
[05:11.800 --> 05:18.000]  So here is a simple example how to do a BBA pen file.
[05:18.000 --> 05:23.360]  This is basically extending the existing recipe for Weston so that we can build the
[05:23.360 --> 05:26.800]  module for screen sharing with RDP.
[05:26.800 --> 05:32.000]  Out of the box, it's not built, so we have to go one step further and make this configuration.
[05:32.000 --> 05:37.120]  It's just a build configuration to make sure that in core image Weston, which is a small
[05:37.120 --> 05:45.920]  image containing Wayland and Weston, we can have this module and we can enable, after that,
[05:45.920 --> 05:48.680]  screen sharing over RDP.
[05:48.680 --> 06:01.440]  And the RDP implementation in Wayland is based on free RDP, so we have to add it as a dependency.
[06:01.440 --> 06:07.480]  So after we have this, at runtime, we need to do a little bit of more configuration.
[06:07.480 --> 06:12.960]  Well, actually, we have to do them unless we haven't done them as part of the automation
[06:12.960 --> 06:15.400]  of the recipes with Yocto and Open embedded.
[06:15.400 --> 06:21.320]  But this is just a simple example of how to generate appropriate keys.
[06:21.320 --> 06:26.880]  After that, to configure the Weston init file, this is the master configuration file
[06:26.880 --> 06:31.920]  of Weston with various configurations depending on your system.
[06:31.920 --> 06:40.160]  So there, you have to enable in the screen sharing section the command to be launched
[06:40.160 --> 06:42.480]  when you do screen sharing.
[06:42.480 --> 06:48.280]  But when this is done, remember to launch Weston or restart it just to make sure that
[06:48.280 --> 06:51.040]  the right configuration is loaded.
[06:51.040 --> 06:53.560]  But after that, there is one more thing you need to do.
[06:53.560 --> 06:59.360]  You need to press control out plus S. That's pretty cool if you have a keyboard.
[06:59.360 --> 07:03.160]  But some embedded devices don't have keyboards, right?
[07:03.160 --> 07:10.840]  So hold on, hold on, I've told you it's ups and downs, so sometimes they're downs.
[07:10.840 --> 07:18.120]  You are versions of Weston actually have this option to put in Weston init, which allows
[07:18.120 --> 07:25.280]  you to do automatic start up of the screen sharing with Weston.
[07:25.280 --> 07:29.680]  And this has been added to Weston version nine.
[07:29.680 --> 07:37.080]  And I believe this feature was added by Marek who had a talk here earlier about you boot.
[07:37.080 --> 07:38.800]  So you probably know him.
[07:38.800 --> 07:43.360]  So thank you very much for doing this because this is a really useful feature if you are
[07:43.360 --> 07:48.680]  working on an embedded device that doesn't have a keyboard.
[07:48.680 --> 07:54.160]  And once you're ready with this, from another computer in the same network, you can launch
[07:54.160 --> 08:00.440]  a client that supports RDP and you can connect remotely to your embedded device.
[08:00.440 --> 08:08.520]  Here are a couple of examples depending whether you're using Wayland and based on your response
[08:08.520 --> 08:13.760]  to my question at the beginning of the session, it looks like a lot of you are using Weston.
[08:13.760 --> 08:19.120]  So here you go, you just replace the IP and if everything is okay, you'll be able to connect
[08:19.120 --> 08:21.480]  to your embedded device remotely.
[08:21.480 --> 08:25.680]  And if you're still using X11, you're still in the game.
[08:25.680 --> 08:29.000]  So here is a very simple demonstration.
[08:29.000 --> 08:32.920]  And what we see here is a screenshot from my computer.
[08:32.920 --> 08:39.320]  My computer is, I'm kind of a lazy Linux user, so it's just Ubuntu FTS support.
[08:39.320 --> 08:44.560]  So we have Ubuntu with Wayland and GNOME, which we see on the back.
[08:44.560 --> 08:51.520]  And here in this screen, we are seeing core image Weston running on Raspberry Pi 4 with
[08:51.520 --> 08:55.920]  the configurations that you have seen in the previous slides.
[08:55.920 --> 08:58.440]  All right.
[08:58.440 --> 08:59.440]  So that's all.
[08:59.440 --> 09:01.640]  That's pretty much how it works.
[09:01.640 --> 09:05.000]  RDP has some ups and downs.
[09:05.000 --> 09:10.120]  I guess the major conclusion from this lightning talk is that if you come into a situation
[09:10.120 --> 09:16.040]  where you need to do screen sharing on embedded device that is running Wayland and Weston,
[09:16.040 --> 09:21.080]  as an alternative to VNC, you have RDP as an option.
[09:21.080 --> 09:24.920]  And use the Yocto project and open embedded, it's pretty cool and it's pretty much everywhere
[09:24.920 --> 09:25.920]  nowadays.
[09:25.920 --> 09:27.920]  Thank you very much for the attention.
[09:27.920 --> 09:35.400]  I think we're just on time.