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Monitor Network Traffic per Process with Nethogs

Yesterday I wrote about using 3G on Raspberry Pi board,  and one of the commenter mentioned higher traffic than expected when connecting to 3G to just send a few bytes before disconnecting. One of the reasons are the extra data needed if you transmit data over a secure connection, for example establishing a PPP connection, connect to the board over SSH, and disconnect, results in the transmission & reception of a few kilobytes on my board:

But if you get much more traffic than that, you may want to investigate if another package may transfer data when it detects the connection is up. To analyze traffic, tcpdump and Wireshark are good options, especially if you want to look into the packets data, however such tools do not tell you which process is sending or receiving the data. So I searched whether I could find a program that would do […]

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Hardkernel Unveils ODROID-N1 Board with Rockchip RK3399 Processor, 4GB RAM, Dual SATA, and More

It’s official, there’s a bubble of Rockchip RK3399 boards announcements or launches in early 2018. After AAEON RICO-3399, Orange Pi RK3399, and Pine64 RockPro64, which add to 96Boards compliant Rock960 announced a couple a months ago, and which may launch in Q1 2018, Hardkernel has now announced they’ve been working on ODROID-N1 board. ODROID-N1 board specifications: SoC – Rockchip RK3399 hexa-core processor with a dual-core Arm Cortex-A72 @ 2GHz, a quad-core Arm Cortex-A53 @ 1.5Ghz, and a Mali-T860MP4 GPU that supports OpenGL ES1.1/2.0/3.0, OpenCL 1.2 System Memory 4Gbyte DDR3-1866 RAM, Dual channel interface for 64bit data bus width Storage –  eMMC 5.0 (HS400) flash storage, UHS capable micro-SD slot., 2x SATA3 ports using, native SATA implementation via PCIe-gen2 to SATA3 interface Video Output – HDMI 2.0 for 4K display Connectivity – Gigabit Ethernet port USB – 2x USB 3.0 host ports, 2x USB 2.0 host port. Expansion – 40-Pin GPIO […]

Khadas Edge2 Arm mini PC
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Ubuntu 18.04 LTS Minimal Image Gets Even Smaller (30MB Compressed)

Sometimes you want to get the smallest image you can get, either because your storage device has limited capacity, you may want a faster boot, oe because you can. In the past, I’ve covered minimal firmware images for Raspberry Pi using Raspbian or the Yocto Project, as well as SliTaz or more recently a minimal Ubuntu 16.04  for ODROID C2/C1+ boards. Minimal images are also popular for containers like docker or LXD. Canonical has released Ubuntu minimal images for several years, and Dustin Kirklan blogged about Ubuntu 18.04 LTS mini images a few days ago, showing the good progress made over Ubuntu 14.04 and 18.04 “Bionic Beaver”, and asking for feedback. The charts above shows the minimal image went from around 62.78 MB (compressed) and 179.67 MB (uncompressed) for Ubuntu 14.04 LTS down to 29.65 MB (compressed) and 77.5 MB (uncompressed). That’s the number of AMD64 images, but ARM64 Ubuntu […]

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$2 USB “18650 Battery Shield” Powers Arduino, ESP32, and Other Low Power Boards with a 18650 Battery

If you’re looking for battery power for one of your projects, you may consider a “18650 battery shield” – going for just above $2 on Aliexpress or eBay  – for powering Arduino boards, Espressif ESP8266 or ESP32 boards, or any board that can be powered by 5V up to 2A via USB or headers, or by 3V up to 1A via headers. Specifications listed on eBay/Aliexpress: Power Input – 5 to 8V via micro USB port up to 0.5A charging Power Output 5V via Type A USB port 3V up to 1A via 3x 2-pin header 5V up to 2A via 3x 2-pin headers Misc – 1 switch control USB output, LED for charging status (green = full, red = charging) Battery protection (Over-charge or Over-discharge) Dimensions – 9.8 x 2.9 cm You’ll need to add your own 18650 battery, and be careful about polarity while installing it, since putting […]

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Mycroft Mark II Smart Speaker / Voice Assistant Works with Open Source Software (Crowdfunding)

Smart speakers have gain a lot of traction over the last few years, but many of the solutions are based on Google Assistant or Amazon Alexa voice services, with both companies likely tracking your voice searches the same way they track your online searches to provide a “personalized experience” and sell you products or server ads that match your interests. If you don’t like being tracked that way, a solution is to use an open source voice assistant such as Mycroft, and install it on a Linux computer, Raspberry Pi 3 board, or Android device. The company also introduced Mark I reference hardware platform based on Raspberry Pi 2 in 2015, and while all those hardware options should be fine for the technically inclined, but not really suited to the typical end user, and AFAIK they all lack a microphone array for better hot word detection. So Mycroft has come […]

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MeLE A1000 TV Box is Back! Cost: $29.99 Shipped

MeLE A1000 is an Android TV box powered by Allwinner A10 Arm Cortex A8 processor that was launched in 2012 with Android 2.3, and was featured prominently on this blog, as arm-netbook then linux-sunxi community was working on porting Linux to the platform at that time. I discovered the device after the launch of the first Raspberry Pi board, and its subsequent unavailability due to extreme demand, and was looking for an alternative which became MeLE A1000, since there was an active around the box that included a real SATA port as a bonus. Why am I writing about this today? Because the TV box just showed up in GeekBuying new arrivals feed for $29.99. The device’s appearance has not changed, and the hardware specifications are the same too: SoC – Allwinner A10 Arm Cortex A8 processor with Mali-400 GPU System Memory – 512MB DDR3 RAM Storage – 4GB NAND […]

Rockchip RK3568/RK3588 and Intel x86 SBCs
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BigClown is a Battery Powered Modular Wireless IoT Kit for Makers (Crowdfunding)

BigClown IoT Kit is designed to be as easy to use as building a castle from LEGO bricks or an IKEA cabinet. The open source kit is comprised of a coreboard module with STMicro STM32L0 Cortex M0+ micro-controller, and a sub GHZ (868/915MHz) radio for wireless communication, that accepts one or more compatible modules (currently ~30 different options), and communicate to a gateway such as Raspberry Pi or Turris Omnia where you’d connect BigClown RF USB dongle, although it’s also possible to include a Sigfox module for communication, and , LoRa & NB-IoT module appear to be planned. That’s for the hardware…The kit then connects to your chosen gateway via MQTT, which in turns accesses cloud services such as Ubidots, Microsoft Azure IoT, AWS, IFTTT, etc… , and you can monitor the data or control the kit through a web based dashboard or your own application. Core Module specifications: MCU […]

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FOSDEM 2018 Open Source Developers Meeting Schedule

FOSDEM (Free and Open Source Software Developers’ European Meeting) occurs every year on the first week-end of February, where developers meet for two days discussing about open source software projects. FOSDEM 2018 will take place on February 3-4 this year with  652 speakers, 684 events, and 57 tracks, an increase over  last year 608 speakers, 653 events, and 54 tracks. There will be 8 main tracks namely: Community, History, Miscellaneous, Performance, Python, Security and Encryption, Space, and Global Diversity CFP Day. There will also be 33 developer rooms, and since the full schedule is now available, I’ll make a virtual schedule mostly based on sessions from the Embedded, mobile, and automotive, Hardware Enablement, and Internet of Things devrooms. Saturday 3, 2018 09:50 – 10:15 – Turning On the Lights with Home Assistant and MQTT by Leon Anavi In this presentation you will learn the exact steps for using MQTT JSON […]

Khadas VIM4 SBC