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Fedora 26 Supports Single “Unified” OS Images for Multiple ARM Platforms

The decision to use device tree in Linux occurred several years ago, after Linus Torvalds complained that Linux on ARM was a mess, with the ultimate goal of providing a unified ARM kernel for all hardware. Most machine specific board files in arch/arm/mach-xxx/ are now gone from the Linux kernel, being replaced by device tree files, and in many case you simply need to replace the DTB (Device Tree Binary) file from an operating system to run on different hardware platforms. However, this is not always that easy as U-boot still often differ between boards / devices, so it’s quite frequent to distribute different firmware / OS images per board. Fedora has taken another approach, as the developers are instead distributing a single Fedora 26 OS ARMv7 image, together with an installation script. Images for 64-bit ARM (Aarch64) are a little different since they are designed for SBSA compliant servers, so […]

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Sonoff Wireless Switches & Light Bulbs Now Work With Google Home

ITEAD Studio Sonoff wireless switches can be controlled by voice commands using Amazon Alexa or Google Home, but so far, the latter was only possible by emulating Belkin Wemo switch in alternative open source firmwares such as ESPurna or Sonoff-Tasmota. For people who don’t want to update the firmware themselves, and instead prefer to use the stock firmware with eWelink mobile app, the manufacturer has now announced support for Google Home, on top of the already supported Amazon Alexa service. The instructions are explained in details in ITEAD’s blog post, but basically, you need to start Google Home app in your mobile, select your Google Home device, go to Home Control to add Devices, select Smart We Link, login to eWelink with your username/phone number and password, name the devices you want to control and you’re done. You should now be able to control devices or rooms with voice commands […]

Khadas Edge2 Arm mini PC
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RakWireless RAK831 LoRa Gateway Module is Based on Semtech SX1301 Base Band Processor

We’ve previously covered several products from RakWireless, with a Realtek WiFi IoT board, a WiFi camera board, and a Amazon Alexa compatible audio board. The company has now launched RAK831, a LoRaWAN gateway board powered by Semtech SX1301 base band processor, and working with their RAK811 LoRa node or other compatible nodes. RAK831 LoRA gateway board specifications: Connectivity Semtech SX1301 base band processor with LoRa concentrator IP Frequency bands – 433, 470, 868, or 915 MHz Sensitivity – Down to -142.5 dBm Maximum link budget – 162 dB Output power level – up to 23 dBm Emulates 49 x LoRa demodulators 12x parallel demodulation paths 1x (G)FSK demodulator 2x SX1257 Tx/Rx front-ends high frequencies 2x SX1255 Tx/Rx front-ends low frequencies Range  – Up to 15 km (Line of Sight); several kilometers in urban environment GNSS – Optional GPS support Host Interface – SPI Expansion – 24-pin 2.54mm pitch “DB24” header […]

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Rockchip Sapphire is a $75 Rockchip RK3399 Development Board

While there are several Rockchip RK3399 boards on the market, I’d still recommend to use Firefly-RK3399 development board for Android and Linux based projects since they have decent documentation, and the board has been around for several months now. Price is a little high however, as it starts at $159 on Amazon US. There’s been other boards like 9Tripod RK3399 that’s a little cheaper, but mostly targeting the Chinese market, and Shenzhen Xunlong is working on their own RK3399 board and module, but it’s not available yet.  Nightseas user bought another board called Rockchip Sapphire on Taobao for just 500 RMB (~$75 US), and reported his findings on Armbian forums. Rockchip SAPPHIRE board specifications: SoC – Rockhip RK3399 hexa-core big.LITTLE processor with two ARM Cortex A72 cores, four Cortex A53 cores, and an ARM Mali-T860 MP4 GPU System Memory – 4 GB LPDDR3, dual channel Storage – 8 GB eMMC […]

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Manga Screen 2 is Smartphone Touchscreen Display with USB and HDMI Ports for Makers (Crowdfunding)

Most touchscreen displays aimed to be connected to a development board work through a display interface such as MIPI DSI or LCD RGB (and USB or I2C for touch support), and come with somewhat low resolution such as 800×480 which can be suitable for HMI applications. They also often don’t work with all boards due to the different interfaces used, and there’s no way to easily connect such small display to your computer. Taking those limitations into account, and since most boards and computers come with HDMI and USB ports, Elias Bakken and his team have added HDMI and USB ports to two smartphone displays, and Manga Screen 2 was born. The two displays – made by Sharp – have the following hardware specifications: Big (5.9”) Small (4.8”) Resolution 1920×1080 1280×720 FPS (max) 60 57 Color mode 24-bit PPI 376.2 307.9 Brightness 400 cd/m2 500 cd/m2 Contrast ratio 1000:1 800:1 […]

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Le Potato Development Board Review – Part 1: Hardware and Accessories

Libre Computer launched AML-S905X-CC “Le Potato” board on Kickstarter last month, and since then there have been some updates such as worldwide shipping, so the board will now ship to most countries, not only in Europe or the US, and various designs of the case have been proposed. You can check the updates on Kickstarter for details. Libre Computer Le Potato Kit Unboxing The company also sent me a Le Potato board, but not only, as I received a complete kit… … similar to the $99 “2GB eMMC kit” reward on KS with a board with 2GB RAM, a 64GB eMMC flash module, a HDMI cable, and a 5V/2.5A power supply with on/off switch, but a different case, cooling fan, and corresponding rubber pad and screws. The case exposes all external ports, and has holes on top for the fan. The other side includes the micro SD slot, plenty of […]

Rockchip RK3568/RK3588 and Intel x86 SBCs
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NetBSD is Now Running on Allwinner H3 Boards

Most people will run Linux kernel on development boards because it does the job, and that’s usually the only option. But others have been working on NetBSD kernel for Allwinner H3 boards, and it’s now running on various H3 boards with serial console, USB, Ethernet, SD card, and eMMC flash working. Jared McNeill explains they first had to deal with low-level code to initialize the CPU and MMU, before using a U-boot layer to disguise NetBSD as the Linux kernel in order to load kernel and device tree file. The code then jumps to the generic ARM FDT implementation of initarm to relocate DTB data and perform other steps, and finally they can enumerated devices. This is explained in greater details in the aforelinked blog post on NetBSD website. Jared tested the implementation on NanoPi NEO and Orange Pi Plus 2E, but others have reported success on various hardware based […]

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Libre Computer’s Le Potato Amlogic S905X Development Board Goes for $25 and Up (Crowdfunding)

Up to now there were two notable Amlogic S905(X) development boards: ODROID-C2 and Khadas Vim. Shenzhen Libre Technology Co., Ltd, a Shenzhen startup, is about to bring one more to the market with Le Potato board, aka AML-S905X-CC, powered by Amlogic S905X processor with 1 or 2 GB RAM, and in a form factor similar to the Raspberry Pi 3 board. Le Potato /AML-S905X-CC board specifications: SoC – Amlogic S905X quad core ARM Cortex-A53 processor @ 1.5 GHz with penta core ARM Mali-450MP GPU, and Amlogic Video Engine 10 System Memory – 1GB or 2GB DDR3 RAM Storage –  1x micro SD Card slot with UHS SDR104 support, eMMC module connector with HS400 support Video Output – HDMI 2.0 Port, 3.5mm TRRS “AV” jack with CVBS (480i / 576i) Audio Output – HDMI, AV jack (stereo audio), SPDIF output header, and I2S header Connectivity – 10/100M Ethernet USB – 4x […]

Khadas VIM4 SBC