Embedded Android (Marshmallow) and Brillo / Weave Internals Presentation Slides

Karim Yaghmour – founder of Opersys, a company specializing in Embedded Linux and Android training and development – is currently at Android Devcon 2016 were he gave a full day Embedded Android Workshop on August 1st, as well as a separate 1+ hour talk about Brillo/Weave internals on August 2, and more talks scheduled on the next two days about Android memory management, debugging and development, and Project Ara. He has just released the presentation slides on Slideshare, with the first “Embedded Android Workshop with Marshmallow” presentation totaling 175 pages, and dealing with Linux and Android concepts, overall architecture, system startup, the Linux kernel, hardware support, native user-space, Java for Android, JMI, AOSP, and more… The second presentation is much shorter with 29 slides, and deals specifically with Brillo / Weave internals including Embedded Linux, Android, Binder, DBUS, HAL, the source tree architecture, and so on. While you’d probably learn […]

How to Set an Android TV Box Video Output to Portrait Mode

Most buyers who buy an Android TV box just want to use it to watch videos, browse the web, play games, and so on, so landscape mode seems to be the best choice, and the orientation option in the firmware is often disabled. However, TV boxes can also potentially be used as digital signage players, which may require landscape or portrait modes if the screen is positioned vertically. Since I’ve just been asked that question, I’ve checked for a solution, and luckily there’s an app called Set Orientation that does the job. [Update August 2021: The app has been removed from the Google Play store, it might be worth trying Screen Rotation Control app instead] When you first start the app, it will show the option “Disabled”, but you can click on the arrow to reveal more options, and select Portrait to rotate the screen. In case the screen is […]

Khadas Edge2 Arm mini PC

The Internet of Bridges? Connected and Solar Powered Systems for Rainfall and Stream Water Level Monitoring

We often drive on a bridge fitted with some solar powered equipment, and recently they added a solar powered camera pointing towards the river, so I became curious and decided it would be fun to have a look, and find out what it was all about. There are now 3 solar powered and connected systems. The first system has a larger solar panel connected to a Bosch camera, and a white box… The sticker on the box gives away the purpose of the system: “National Disaster Warning Center” If we look the other side of the system we’ll see an antenna (for 3G/LTE?) as well as a light pointing down to a scale to measure the water level… Probably not the most cost effective way of checking out the level, but it works, and they should have a live feed in case something goes very wrong, and it might be […]

Samsung JerryScript is a Lightweight Open Source JavaScript Engine for the Internet of Things

In the old days, micro-controller programming was all done in assembly or C, but in recent years higher level languages, included interpreted ones such as Python and JavaScript, have made their ways into MCUs with projects such as MicroPython or Espruino (JS) often running on STMicro STM32 ARM Cortex M micro-controllers, but also other platforms such as ESP8266. As I browsed through the Embedded Linux Conference Europe 2016 schedule, I discovered that Samsung worked on it own implementation of a JavaScript engine for the Internet of Things: JerryScript. It is a full implementation of ECMAScript 5.1 standard written in C that can run on micro-controllers with less than 64KB RAM, and less than 200KB storage (160KB footprint with ARM Thumb-2 compilation). JerryScript is comprised of two main components: Parser and Virtual Machine (VM), with the parser performing translation of input ECMAScript application into byte-code than is then executed by the Virtual […]

Embedded Linux Conference & IoT Summit Europe 2016 Schedule

Embedded Linux Conference & IoT summit 2016 first took place in the US in April, but the events are now also scheduled in Europe on October 11 – 13 in Berlin, Germany, and the schedule has now been published. Even if you are no going to attend, it’s always interesting to find out more about the topic covered in that type of events, so I had a look, and created my own virtual schedule with some of the sessions. Tuesday, October 11 10:40 – 11:30 – JerryScript: An Ultra-lightweight JavaScript Engine for the Internet of Things – Tilmann Scheller, Samsung Electronics JerryScript is a lightweight JavaScript engine designed to bring the success of JavaScript to small IoT devices like lamps, thermometers, switches and sensors. This class of devices tends to use resource-constrained microcontrollers which are too small to fit a large JavaScript engine like V8 or JavaScriptCore. JerryScript is heavily […]

Have Your Say with this Android TV Box Survey (and Potentially Win One)

While you probably know what you want in an Android TV box, it’s quite difficult to find out what the market wants exactly, so I’ve been asked to run a short survey about Android TV boxes, the importance of Android apps like Kodi, Plex, or Netflix, brands, and support. It will run for about 7 days, the results will be public, so I’ll post them once they become available. The survey is short – 5 questions -,  and anonymous, except if you want to participate in the lucky draw to win one Android TV box, as you have to leave an email address.

UP 7000 SBC

Development Resources for Realtek “Ameba” RTL8710, RTL8711, and RTL8195 WiFi SoCs

We were made aware of a potential ARM based ESP8266 competitor last week with Realtek RTL8710 WiFi modules selling for about $3.5 shipped per unit, and under $2 per unit for larger orders (100+ pieces). Hardware is good, but for a platform to be successful, or even just useful, you also need software support. So I started doing some research into IoT-Tech BBS and asked ICStation for an “SDK” for the module they sold. I ended up on this forum post providing an “Realtek RTL8710 SDK” via Baidu (password: brwp), which turned out to be about the same as the Google Drive link provided by ICStation, and only contain minimal documents, as well as cracked Windows IAR Embedded Workshop and JLink tools. There are also some more technical details in Chinese only in another forum post, and well as B&T RTL8710 module datasheet (PDF). However, if you don’t read Chinese […]

QINTAIX Q912 Android TV Box is Powered by Amlogic S912 Octa-core SoC

I published pictures of Amlogic S912 TV box boards just over a month ago, and it appears companies have started to take orders from resellers for Amlogic S912 TV boxes with products such Videostrong KM8 Pro, or the one I’m going to cover in this post: QINTAIX Q912. QINTAIX Q912 specifications: SoC – Amlogic S912 octa-core ARM Cortex A53 processor @ up to 2.0GHz with ARM Mali-820MP3 @ up to 750MHz System Memory – 2GB  DDR3 Storage – 8GB or 16GB eMMC flash + micro SD slot Video Output – HDMI 2.0 and AV ports Audio Output – HDMI, AV, and optical S/PDIF Video codecs – VP9 profile 2 up to 4K @ 60 fps, H.265 [email protected] up to 4K 60fps, H.264 AVC up to 4K @ 30 fps, H.264 MVC up to 1080p60, MPEG-4, WMV/VC-1 SP/MP/AP,  AVS-P16(AVS+)/AVS-P2 JiZhun Profile, MPEG-2 MP/HL, MPEG-1 MP/HL, and  RealVIDEO 8/9/10 all up to […]

Khadas VIM4 SBC