Posted on by Jean-Luc Aufranc (CNXSoft) - 7 Comments on $275 HackRF Open Source Software Defined Radio (SDR) Platform

$275 HackRF Open Source Software Defined Radio (SDR) Platform

HackRF is an open source hardware project to build a Software Defined Radio (SDR) supporting a frequency range between 30 MHz and 6GHz in both directions (Tx and Rx, half-duplex) with a maximum bandwidth of 20MHz. Jawbreaker (shown below) is a beta hardware that has been tested by several developers and beta testers, and applications such as Digital Audio Broadcasting (DAB), Bluetooth monitoring, spectrum sensing, wireless microphones, AIS, FM radio, etc.. have already been ported to the platform. In order to lower the cost of the hardware, Michael Ossmann has launched a Kickstarter campaign to fund mass production. There seems to be many SDR enthusiasts as the campaign has already reached its funding target ($80,000) and received for over $300,000 in ledges. What is Software Defined Radio (SDR) and What Can it Be Used for? Before providing details about the hardware and software, it may be useful to provide some […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 3 Comments on Fritzing Open Source Software Designs PCB Layouts from Breadboard Drawings

Fritzing Open Source Software Designs PCB Layouts from Breadboard Drawings

Earlier this year, I’ve tried Gumstix Geppetto, a web-based application that let you easily design and order boards. You can just add some building blocks in Chrome browser, connect them, and you’re ready to order a PCB. However, the setup fee of $1999 reserves it to businesses. Don’t worry If you’re just a hobbyist as Fritzing, an open source software supporting Windows, MacOS and Linux, allows you to draw breadboard connections, and automatically route the schematics, and the PCB layout. You can then export the gerber files, or order directly from Fritzing Lab. The software is not exactly new, but it’s the first time I’ve come across it. I’m using Ubuntu 12.04 64-bit, so let’s download, install and run the corresponding version:

I’ve decided to connect an LED on the breadboard, and control it with an Arduino Leonardo board to try the software. Alternatively, you could also play around […]

Khadas Edge2 Arm mini PC
Posted on by Jean-Luc Aufranc (CNXSoft) - 12 Comments on MK908 Rockchip RK3188 mini PC Android 4.2.2 SDK Leaked

MK908 Rockchip RK3188 mini PC Android 4.2.2 SDK Leaked

We’ve had the Linux source code for RK3188 for a little while, which allowed a preliminary Ubuntu image to boot on devices such as Tronsmart T428. But AFAIK, we did not have any Android SDK for RK3188 HDMI TV Stick, until now. A new user on ARMTvTech has uploaded 5 rar files that can be decompressed into a single 3.2GB file called mk908_RK3188_R-BOX_ANDROID4.2.2-SDK.tar.gz. I’ve had a look, and this is the content of the file which appears to be a complete Android 4.2.2 SDK for MK908. There’s 2 documents in Chinese: mk908_checklist.doc – Apparently some instructions, or recommendations specific to Android MK908_checklist_kernel.docx – Some details about the kernel config There are also more documents and directories in RKTools/docs, but I haven’t checked the details:

Back to the root directory, we’ve got a Makefile, and mkimage.sh script, but both are called by 3188.sh script which apparently builds all, and generates […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 4 Comments on Developers Are Working on Chromecast Functionality From Any Android Apps via Any Android Devices

Developers Are Working on Chromecast Functionality From Any Android Apps via Any Android Devices

If you don’t just come back from (too long) holidays, you should know Google has released the Chromecast, a $35 HDMI TV Stick that uses a protocol called DIAL to let users stream online videos on the TV via your mobile device or mirror your Chrome browser on the TV. However, there are currently quite a few limitations. It can only be used with apps specifically designed for Chromecast (e.g. YouTube, Netflix,…), and Chromecast is the only available receiver, and can only be purchased in the US. Luckily these may not be an issue soon… Koushik Dutta (Kouch) has taken care of the first issue by modifying Cyanogenmod to allow any video or audio app to stream the media files via the TV, using Android notifications. Perfect. Moving to the second issue. If you don’t live in the US, you’re still stuck, and if you do live in the US, […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 10 Comments on Huawei MediaQ M310 Is Now Available For Purchase

Huawei MediaQ M310 Is Now Available For Purchase

Huawei MediaQ M310 is a media player based on Hisilicon K3V2 quad core SoC, the company unveiled at CES 2013. The company expected the product to be released in Q3 2013 (about now), and the good news is that it has started to pop-up on Aliexpress for $109 including shipping. The bad news is that the only seller has no feedback at all, so you take an extra risk if you buy right now, and I’m sure it will show up in more places in the days or weeks ahead. Let’s remind us of the specifications: SoC – Hisilicon K3V2 Quad-core Cortex A9 processor with Vivante GC4000 GPU System Memory – 1GB RAM Storage – 4GB Flash + microSD card slot Video I/O – 1x HDMI In,1x HDMI Out Audio I/O – HDMI, SPDIF, 3.5mm stereo jack, Mic mono USB – 2x USB 2.0 (1 extension from Y cable) + […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 14 Comments on $85 Jesurun K8 (Hi720) Android 4.2 STB Powered by Rockchip RK3188

$85 Jesurun K8 (Hi720) Android 4.2 STB Powered by Rockchip RK3188

It looks like MK888 (aka CS918 or K-R42-1), or more exactly MK888B (Includes Bluetooth support), is now getting some competition with Jesurun K8, another Rockchip RK3188 set-top box with 2GB RAM, 8GB Flash, and Bluetooth support, that sells for as low as $80 on Aliexpress (called Hi720), and $85 on DealExtreme. Here are the specifications listed on DX: SoC – Rockchip RK3188 quad core Cortex A9 @ 1.6GHz + Mali-400 MP4 GPU System Memory – 2GB DDR3 Storage – 8GB Flash + SD card slot (up to 32GB) Connectivity: Wi-Fi 802.11b/g/n Bluetooth V2.1 10/100M Ethernet USB – 3x USB 2.0 port Video Output – HDMI 1.4 + AV Audio Formats – MP3 / WMA / WAV / OGG/OGA / FLAC / APE / AAC/M4A / RM Video Codecs – H.264 / VP8 / RV / WMV / AVS / H.263 / MPEG4 Power supply – 5V/2A Dimensions – 14.9 cm x […]

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Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Intel Education Tablets Come with a Temperature Probe, a Magnification Lens

Intel Education Tablets Come with a Temperature Probe, a Magnification Lens

Intel has recently announced 2 educational Android 4.x tablets: The 10″ Intel Education Tablet powered by Intel Atom Z2460, and the 7″ Intel Education Tablet based on the newer Intel Atom Z2420. Beside standard features such as Wi-Fi, Bluetooth, dual cameras, etc…, the tablets also come with items such as a temperature probe, and a snap-on magnification lenses for experimentation, as well as a educational software. The table below adapted from LinuxGizmos lists both tablets’ specifications side-by-side. 10.1″ model 7″ model Processor Intel single-core Atom Z2460 (“Medfield”) @ 1.6GHz Intel single-core Atom Z2420 (“Lexington”) @ 1.2GHz RAM 1G LPDDR2 Flash 16GB eMMC 8GB eMMC + microSD slot Display 1280 x 800 capacitive 5-point touch TFT LCD (16:10) with stylus 1024 x 600 multitouch TFT LCD (16:9) with optional stylus Wireless 802.11b/g/n; Bluetooth 2.1 EDR 802.11b/g/n; Bluetooth 3.0 (optional) Camera 2MP rear; 0.3MP front USB 1x micro USB 2.0 (Type B) […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 5 Comments on NVIDIA Releases Source Code, Binaries, and Android Build Instructions for the SHIELD Gaming Console

NVIDIA Releases Source Code, Binaries, and Android Build Instructions for the SHIELD Gaming Console

This morning I’ve read bad news for the open source community. Jean-Baptiste Quéru, leader of the Android Open Source Project (AOSP) has decided to quit the project because AOSP cannot run on the latest Nexus 7 as Qualcomm (lawyers) impeded the project, and Google is unable to released factory images or necessary binary drivers for the GPU. But there’s also good news, as Nvidia has just released source code and binaries to allow developers to fully build an Android image for its SHIELD gaming console. If you want to build an image for the latest image available, following the steps below. Get the code

Build the Android image (Provided you’ve already setup your Linux PC do build AOSP):

Done (mp dev took  about one hour for my machine). You should now have the required binary images in out/target/product/roth/ directory. Enter fastboot mode before flashing the binaries by one […]

Khadas VIM4 SBC