CNX Software - Embedded Systems News

January 27, 2015 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

Olimex ESP8266-EVB Wi-Fi Evaluation Board Includes a Relay, an UEXT Connector

Olimex announced open source hardware ESP8266 modules last month, and the company has just announced the availability of ESP8266-EVB board with an ESP8266 module, a relay, an UEXT connector for other compatible Olimex modules, and headers for access to GPIOs. ESP8266 evaluation board specifications: MOD-WIFI-ESP8266-DEV Wi-Fi module with soldered connectors Female connectors for MOD-WIFI-ESP8266-DEV 10A/250VAC Relay Expansions 16-pin header (CON3) with access to some GPIOs, ADC, SDIO, RESET, and power signals. UEXT connector to connect modules and sensors from Olimex, or access I2C, UART, SPI, and extra GPIOs Misc – User Button which can also be pressed at boot time to enter bootloader mode for firmware upgrade. Power Supply – 5V/1A recommended; DCDC power converter to 3.3V to supply ESP8266 and UEXT modules with up to 1.5A current Dimensions – 57x50mm (4 mounting holes) You’ll also need 5V power supply, and a USB to serial board (3.3V) in order to […]

January 27, 2015January 27, 2015 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Amlogic S805 Datasheet Released

A datasheet release should not really be news, but not all companies are as open as Freescale, and possibly for fear of IP theft or patent trolls, most companies decide to keep datasheet, technical reference manuals, and other documentation confidential, and only release them under NDA, so it may take months before they come out, if ever. Thanks to Hardkernel and their ODROID-C1 board, Amlogic has allowed the release of Amlogic S805 datasheet (PDF 123 pages). The document is divided into two sections: Section I : System General Description Features Summary CPU and GPU subsystem Memory Map Power Domain Clock and Reset Unit System Boot General Purpose Input/Output (GPIO) Interrupt Controller Direct Memory Access (DMAC) Timer Real Time Clock Section II: Interfaces MMC/SD/SDIO Controller Inter-Integrated Circuit (I2C) Serial Peripheral Interface Communication Controller Serial Peripheral Interface Flash Controller (SPI) Universal Asynchronous Receiver and Transmitter (UART) Infrared Remote Universal Serial Bus (USB) […]

January 26, 2015March 16, 2015 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

X29 Intel Celeron J1800 / J1900 mini PC Sells for $125 and Up

Today, somebody asked me to test 4K output on Intel Atom Z3735F, but I can’t do that since the platform only supports 1080p. As I just posted my unboxing of MeLE PCG03 mini PC, I noticed several ICs where added for extra functionalities, and people also started to complain about lack of Gigabit Ethernet, Fast Ethernet via a USB bridge, no USB 3.0, and no SATA. That’s what happens when you use a Tablet SoC in a mini PC, but if you’re ready to pay a little more, you could still get a mini PC with a proper desktop processor (Bay Trail-D) including SATA, USB 3.0, and Gigabit Ethernet (maybe) for about $125 (shipped) with X29-J1800 computer powered by Intel Celeron J1800 (10W TDP). That’s the price for the barebone system without RAM or storage, and if you want a complete system with 32GB eMMC and 4GB RAM the price […]

January 26, 2015February 9, 2015 by Jean-Luc Aufranc (CNXSoft) - 16 Comments

MeLE PCG03 Windows 8.1 Fanless mini PC Unboxing

MeLE PCG03 was announced in October 2014 with an aggressive price tag of $49 for large orders for barebone systems, and was said to support Windows 8.1 or Android 4.4. MeLE is PCG03 now is now available with 2GB RAM, and 32GB eMMC, and with a properly licensed “Windows 8.1 with Bing NTE”, but no Android for $149 on Ebay, or Aliexpress, and it should eventually show up on MeLE Amazon store. The company sent me a sample for review, so I’ll start by listing the updated specifications, and taking pictures today, before running benchmarks, trying out Kodi, and trying Ubuntu in other posts. MeLE PCG03 Specifications The look of the device and available ports have slightly changed since the first prototype was revealed last year. SoC – Intel Atom Z3735F “Bay Trail” quad core processor @ 1.33 GHz (Bust freq: 1.83 GHz) with Intel HD graphics System Memory – […]

January 26, 2015May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 12 Comments

4K Output and Video Playback Capability Tested on 6 ARM based mini PCs and Boards

Since I’ve now got a 4K TV, I’ve decided to test 4K support for six different platforms based on Rockchip, Allwinner, Amlogic, Realtek, HiSilicon, and Mstar processors. For all these platforms I’ll report HDMI 4K output options, user interface resolution, and take close up pictures of the screen while displaying a 4K 1×1 grid picture and video with the image players, and video players such as MX Player or XBMC depending which are available in the firmware. Test Setup and Procedure I’m using LG 42UB820T 42″ UltraHD television with an HDMI cable connected to HDMI 1 port of the TV. Please note that my TV only support 8-bit color depth / YCbCr 4:2:0 which may cause compatibility issues with some boxes, at least the ones based on RK3288 processor, for 2160p 50Hz or 60Hz mode. I’ll take close-up pictures of the screen with a Canon PowerShot A2300HD camera by holding […]

January 26, 2015January 26, 2015 by Jean-Luc Aufranc (CNXSoft) - 17 Comments

Linux 3D GPU Acceleration Demo on Rockchip RK3288 based Firefly Board

Several devices and development boards based on Rockchip RK3288 processor already support Linux, usually with images based on Ubuntu, including Ugoos UM3 / UT3, Open Hour Chameleon, and Firefly-RK3288 among others. What these images lack however, is support for 2D and 3D graphics acceleration with the GPU, and hardware video decoding/encoding with the VPU. But Jas-hacks has made some progress with 3D graphics support. He has managed to add GPU acceleration via EGL/OpenGL ES bringing 3D acceleration to the platform, but 2D support is not there yet, meaning X11 still heavily relies on software rendering. But the implementation is still good enough to run the usual es2gears and glmark2-es2 benchmarks. as well as some WebGL demos in Chromium. Performance is currently underwhelming, with 50 points in glmark-es2, even a bit lower than the score (54 points) I got with ODROID-X board powered by Exynos 4412 SoC with a Mali-400MP4 GPU, […]

January 25, 2015January 9, 2021 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

All HDMI 2.0 Implementations Are not Equal

One of the key changes between HDMI 1.4 and HDMI 2.0 is support for up to 4K @ 60Hz instead of just 4K @ 30Hz, and at first, I thought an HDMI 2.0 capable device would be compatible with HDMI 2.0 TV, and it did not need to look into details. I was wrong. There’s a nice table in Wikipedia that explains the main differences between HDMI 1.4 and HDMI 2.0 and older versions. Other features include YCbCr 4:2:0 (That’s the important bit), Rec. 2020 color space, 32 channel audio, 21:9 aspect ratio, and more. By the way, there’s no such thing as an HDMI 2.0 cable (Source: straight from the horse’s mouth), so if you have a cable that support 4K30, it will work with 4K60 as well. Does HDMI 2.0 require new cables? No, HDMI 2.0 features will work with existing HDMI cables. Higher bandwidth features, such as […]

January 24, 2015January 24, 2015 by Jean-Luc Aufranc (CNXSoft) - 44 Comments

LG 42UB820T 4K UHD TV Review

After several people often asked me about audio pass-through, and 4K video support on mini PCs, with some suggesting adding a donation button to my website, I decided to start a crowdfunding campaign to raise funds for an AV Receiver and a 4K TV by asking for donations and selling some samples I used for review. Thanks to the great help of my readers, I managed to get enough money to buy LG 42UB820T on Lazada for 19,610 Baht including shipping (~$600) via 10% coupon I got in a newsletter, as well Onkyo TX-NR636 7.2 channel receiver in a local shop in Chiang Mai (Sahapanich). I’m still waiting for the speakers, so I’ll start by reviewing the TV. This model is sold as 42UB820V in Europe, and 42UB8200 in Hong Kong and probably other markets. I spent a lot of time studying about 4K TV and AV receiver features, and […]