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  • Product Reviews, Raspberry Pi
    3 min | 3318

    #CrowPi2: a Raspberry Pi Notebook for Extended Creativity

    Product Reviews, Raspberry Pi | 3 min | 3318


    Last year, Elecrow sent me the CrowPi and I used it in some of my projects, including this video:

    Together with the Corel USB accelerator, I programmed a YOLOv2 object detector, etc.

    The CrowPi kit is magnificent and has everything you need to start playing with the Raspberry Pi. Furthermore, you get everything in a suitcase, that you can close and clean your "mess" in seconds. :)

    Today, Elecrow is announcing a Kickstarter campaign to support the Crowpi2. This time, they integrated the Raspberry Pi in a notebook-like case (see fig. 1), and I think it i...

  • Raspberry Pi
    3 min | 60608

    #Raspberry Pi: Amazon Prime, Netflix, etc. and a DRM solution!

    Raspberry Pi | 3 min | 60608


    It is a rainy day and you have a Raspberry Pi, which is running Raspberry OS (Raspbian), and you think: I can make a media center to watch some movies/series. You configure everything, and then you see something like the next picture, every time that you want to watch Amazon Prime, Netflix, etc. using the Chromium Web Browser:

    Update 2021.04.05: Installing the Widevine DRM package to the Raspberry Pi is a straightforward process, follow the instructions from this tutorial: Raspberry Pi: Amazon Prime, Netflix, Disney, Spotify - a DRM official solution
    Fig. 1: Trying to play Amazon ...
  • Home Automation, Raspberry Pi
    2 min | 4475

    #CC2531 & Raspberry Pi: Philips HUE bridge v1 replacement

    Home Automation, Raspberry Pi | 2 min | 4475


    As you may know, the Philips Hue Bridge v1 has support until April 30, 2020. This means, after April 30, 2020, no software updates will be made available and it will not connect to the online services. However, you can still control it locally via the "dedicated Philips Hue Bridge v1 app". Nevertheless, you have a device (connected to your network) that can be a "treasure" for hackers (MITM-Attacks), and the "dedicated Philips Hue Bridge v1 app" will disappear shortly! (...

  • Home Automation, Raspberry Pi
    6 min | 23342

    #Raspberry Pi: Controlling Philips HUE Lights (ZigBee & CC2531)

    Home Automation, Raspberry Pi | 6 min | 23342


    This article extends the tutorial about Hass.io and the Xiaomi Aqara Sensors that I've published months ago. That tutorial is part of the series of articles about Zigbee and the Rasbperry Pi using the CC2531 USB dongle. Here are the links:

  • Raspberry Pi, Single-board Computers
    4 min | 5470

    #Raspberry Pi: Encrypt (and save) Docker credentials

    Raspberry Pi, Single-board Computers | 4 min | 5470


    Usually, I login to different Docker registries (local, Docker Hub, etc.) with a computer running Ubuntu. I execute once docker login, then I enter the username and password, and after restarting the system, the access data is still available. That means, I write the credentials only once. But, on the Raspberry Pi, it was different until today: I needed to write the login credentials every time I booted the board.

    This article helps you to install the needed tools to save Docker login credentials on the Raspberry Pi, but not as plain text, so that the next time that you reboot the Raspberry t...

  • Raspberry Pi
    6 min | 9575

    #Raspberry Pi 4B: Sometimes it's cool to be hot -or warm, to be exact ;)-

    Raspberry Pi | 6 min | 9575


    This article is the last in a series of three articles that evaluates the performance of the Raspberry Pi 4B. This time the performance of Raspbian with standard kernel (4.19.y) will be evaluated with and without active cooling using two types of heatsinks. The other articles in the series are the following:

    1. The first article is about comparing the Raspberry Pi 4B and 3B+ performances:
    2. The second article compares the Raspberry Pi 4B runn...
  • Raspberry Pi, Real Time Systems
    7 min | 73888

    #Raspberry Pi 4B: Real-Time System using Preempt-RT (kernel 4.19.y)

    Raspberry Pi, Real Time Systems | 7 min | 73888


    The Preempt-RT patching article is one of the most visited articles in my blog. However, that article needed a small update: Raspberry Pi 4B is out there and with Raspbian Buster, a new version of kernel is available: 4.19.y.

    I also uploaded the compiled and patched kernel to lemariva/RT-Tools-RPi. You can follow all these steps and compile the kernel by yourself or you can download the files from the repository and deploy the kernel on your Raspberry Pi 4B.

    This tutorial is the second of a...