• 18
      Sep - 2018

      Product Reviews, Raspberry Pi
      4 min | 1216

      #Review: RasPad - a tablet for open-source platforms like Raspberry Pi

      Product Reviews, Raspberry Pi | 4 min | 1216


      battery
      raspad
      raspberry pi
      table for raspberry pi
      touch screen

      This is my first review on a product that I bought. I hope you enjoy it! Advices and tips are welcome. Please leave me them in the comment section.

      Update: I changed the title of the article from "#Reviews: RasPad - an open source tablet for Raspberry Pi" to "#Reviews: RasPad - a tablet for open-source platforms like Raspberry Pi". The table is a close-source solution for open-source platforms like Raspberry Pi, Beaglebone, etc. (thanks Zykino for your advice!)

      Introduction

      At the beginning of March I supported the Kickstarter campaign called RasPad. I pledged for the Super Early Bird - RasPad...

    • 17
      Sep - 2018

      Cloud Platforms, MicroPython
      7 min | 3935

      #Zerynth: ESP32 & Google IoT Core - Part 1: Sending data to the Cloud

      Cloud Platforms, MicroPython | 7 min | 3935


      bmp180
      data access
      google cloud platform
      home automation
      micropython
      python
      zerynth

      There are lot of tutorials about connecting the ESP32 to a cloud service, but I planned to connect these boards using MicroPython directly to the cloud. That means, I didn't want to use a hardware or software bridge. I wanted to use the Google IoT Core, but MicroPython doesn't support JSON Web Token (JWT), which is needed for the device authentication. I tried to write the library myself, but it didn't work, because of the needed dependencies and the small memory available on the ESP modules. But, I found Zerynth. Zerynth supports JWT and using it, it is possible to connect the ESP32 directly ...

    • 21
      Jul - 2018

      Real Time Systems
      6 min | 9855

      #Raspberry Pi: Real Time System - Xenomai Patching Tutorial for Kernel 4.14.y

      Real Time Systems | 6 min | 9855


      kernel patching
      raspberry pi
      real time system
      xenomai

      The website of Xenomai says the following about it Xenomai:

      Xenomai brings POSIX and traditional RTOS APIs for porting time-critical applications to Linux-based platforms. When the native Linux kernel cannot meet the response time requirements of the application, Xenomai supplements it with Cobalt, a small real-time infrastructure which schedules time-critical activities independently from the main kernel logic.

      Checking the list of supported hardware, the Raspberry Pi 2, 3 B(+) ARM micro (BCM2835) is included.

      This tutorial is almost the same as the tutorial for Preempt-RT patching, but in ...

    • 21
      Jul - 2018

      Real Time Systems
      8 min | 21185

      #Raspberry Pi: Real Time System - Preempt-RT Patching Tutorial for Kernel 4.14.y

      Real Time Systems | 8 min | 21185


      kernel patching
      preempt-rt
      raspberry pi
      real time system

      The Preempt-RT tutorial article is the most visited post on my blog. Therefore, I decided to update the tutorial to make it cleaner, and to introduce some other possible modifications and tips for solving problems.

      Preempt-RT is a popular patch for the Linux kernel to transform Linux into such a real-time operating system. There is another option to get this done, and that's Xenomai (tutorial and performance tests here).

      Tiejun Chen, the main responsible for the official Raspberry-Pi-RT branch, has published a video about Preempt-RT here. It includes tips, results and tests.

      Getting the Sour...

    • 10
      Jul - 2018

      Android Things
      2 min | 1259

      #ProjectDIVA: Arduino Mini Pro

      Android Things | 2 min | 1259


      android things
      arduino mini pro
      nrf24l01
      raspberry pi
      sensor mesh

      This article extends the node tree of ProjectDiva to include an Arduino Pro Mini.

      This article explains how to connect a Arduino Pro Mini to the nRF24Things application (Android Things). The code allows sending and receiving messages between the nodes. It uses the well-known nRF24 libraries to create a sensor mesh, where the node 0 (in this case a Raspberry Pi running the Android Things application) actuates as a "DHCP" server and assigns the node addresses in the mesh.

      Preview

      Requirements

      Hardware & Software


      Arduino Pro Mini Arduino Mini Pro (3.3V) x 1   
      nrf24l01+ NRF24L01+ x1
      ftdi1232 FTDI-1232 x1
      Jumper Cables Jumpe...
    • 06
      Jul - 2018

      General
      1 min | 588

      Unboxing AIY Vision Kit. A surprise like #KORGER!

      General | 1 min | 588


      deception
      fraud
      google
      google aiy vision kit
      raspberry pi
      target manhattan

      Unboxing Google AIY Vision Kit picked up at Target Manhattan Herald Square -New York!- (Target.com) . Also for the fans of Google AIY Voice Kit keep watching! If anyone made the same experience, please advise!

      @Target: It will be great to hear from you!
      @Google: Congratulations on your choice of business partner!


      If you are going to buy something in this shop, please double check the package and the contain before you leave the shop!

      Update 9.07.2018: I managed to get the money back after a 45-minute chat session.

    • 16
      Jun - 2018

      MicroPython
      2 min | 2353

      #MicroPython: Camera stabilisation application

      MicroPython | 2 min | 2353


      9g
      camera stabilization.
      imu
      micro servers
      micropython
      mpu6050
      wipy

      To continue the series of posts "connecting sensors to MicroPython", this article is about the MPU6050 (you can use also the MPU9255, I am still waiting for the Chinese sensor package) and the WiPy 3.0. Combining the IMU sensor with the WiPy and two micro servos 9g, it is possible to stabilize a camera (tilt/rotate).

      To calculate the compensation needed for the stabilisation, I added the umatrix, quaternion and ulinalg libraries to the project to make matrix multiplication and quaternion to Euler conversion. The ahrs library from Madgwick fusions the data of the accelerometer, gyroscope (and m...

    • 14
      Jun - 2018

      General
      1 min | 937

      #Hacking: Hey, YOU! Online SAS user! STOP now!

      General | 1 min | 937


      analytics
      hacking
      online sas
      statistics

      I got you! Please stop trying to hack my website! It's just a small blog! You are ruining my stats! ;)

      Sorry to the other users!, but the last two weeks, someone was using the cloud system ofOnline SAS to try to hack my website. Yes, you heard that right! Someone is trying to hack this small blog! and I can tell you: That's illegal! ;) In the terms and conditions of Online SAS that is NOT allowed! ;P

      Are Paris IP-addresses going to be the next Nigeria IP-addresses? abuseipdb.com has a lot of Paris IP-addresses declared as risky!

      Leave a comment, if you have more info, and if you are the guy tr...

    • 04
      Jun - 2018

      Android Things
      1 min | 1194

      #TI: SensorTag working on Android 8.1

      Android Things | 1 min | 1194


      android
      android studio
      bluetooth
      cc2650
      sensor tag
      sensortag
      texas instruments

      Thanks Sal for your comments on the article TI: Sensortag CC2650 . This is for you and those who are playing with TI SensorTag!

      I've updated the repository of the Texas Instrument (TI) SensorTag CC2650. The repository can be found here . As you may know TI doesn't update the repository anymore. The original last open source repository of the application can be found here .

      I've wrote an article last year as I migrated and updated the repository:

      Today, I've updated the repository to support Android 8.1 (>6.0). The main modification was that Android >6.0 needs locatio...

    • 03
      Jun - 2018

      MicroPython
      4 min | 7476

      #Tutorial: Getting started with MicroPython: Sensors - Part 1

      MicroPython | 4 min | 7476


      esp32
      esp8266
      micropython
      proyects
      sense environment
      sensors
      wipy

      One of the most visited articles on my blog is the Getting started with MicroPython! tutorial. If you still don't know what is MicroPython and you want to start programming microcontroller boards (ESP32, ESP8266 etc.) using a small version of Python 3, you should look at that article . Don't expect to use machine learning or/and other big libraries (the available RAM and microcontroller performance is far away for that aim), but you can do some projects like these:

    • 13
      May - 2018

      Android Things
      1 min | 833

      #ProjectDIVA: Android Things v1.0!

      Android Things | 1 min | 833


      android things
      application
      cc2650
      sensor mesh
      sensor tag
      sensors
      update

      Google has released Android Things 1.0 this week to developers with long-term support for production devices.

      I've updated today the two applications to run on this Android Things version:

      Additional resources

      Take a look at the full release notes for Android Things 1.0, and head over to the Android Things Console to begin validating your devices for production with the 1.0 system image. If you are looking for a Getting Started on Android Things, head over to these posts:

    • 08
      May - 2018

      Analytics
      9 min | 6711

      #Tutorial: Docker on Embedded Systems (Raspberry Pi & Beagleboard)

      Analytics | 9 min | 6711


      analytics
      beagleboard
      beaglebone
      docker
      embedded systems
      portainer
      raspberry pi
      tutorial

      Docker is a technology that emerged for about 5 years and since then it has simplified the packaging, distribution, installation and execution of (complex) applications. Usually applications consist of many components that need to be installed and configured. Installing all needed dependencies and configuring them correctly is usually time consuming and frustrating for users, developers and administrators. Here is where Docker comes to simplify this process allowing developers and users to package these applications into containers.

      A container image is lightweight, stand-alone, executable pa...

    • 06
      May - 2018

      Analytics
      2 min | 14062

      #Tutorial: Portainer for local Docker environments on Windows 10

      Analytics | 2 min | 14062


      analytics
      data science
      docker
      docker enviroments
      docker management
      portainer
      windows 10

      Docker is a technology that emerges for about 5 years and simplifies the packaging, distribution, installation and execution of (complex) applications. Portainer is a management UI which allows you to easily manage your different Docker environments. If you are here because of the post title, I do not have to explain anymore about the Docker technology and the management tool Portainer. But, if you need to know more about these two topics, I leave you two links:

      Let's start with the installation of Portainer for Docker management on Windows 10 (running on a Linux Container)...

    • 29
      Apr - 2018

      Android Things
      3 min | 1050

      #ProjectDIVA: Android Things 0.8.1 getting started

      Android Things | 3 min | 1050


      android things
      application
      raspberry pi
      sensor mesh
      sensors
      tutorial

      After the Hannover Fair 2018, I have this weekend some time and I decided to update the #ProjectDIVA to the last version of Android Things. Today the actual version is 0.8.1 DP and the Android Things Setup Utility has the version number 1.0.19.

      I have two applications running on Android Things:

      In Oct. 2017, I wrote a tutorial for Android Things, but I checked that the tutorial needed an update, and the repositories too. That's why I'm writing this post.

      What is Android Things?

      This section does not change too much fr...

    • 28
      Apr - 2018

      General
      3 min | 1410

      #General: My Nexus 5X has bootlooped! Temporary fix

      General | 3 min | 1410


      bootloop
      design problem
      nexus 5x
      temporarily fix

      I have a Nexus 5X or I had a working Nexus 5X, and last week it turned black and has finally bootlooped! I bought it from Google Store, so I decided to contact Google. I knew that the warranty was expired on Dec. 2017 (Google repeated it), but this is a common problem of the Nexus 5X, so I thought that maybe I have a chance! But NO! The support was nice, but the solution was to contact LG. A death path! Meaning: No goodwill from Google! Nothing! I contacted LG, and the solution was to send the phone to this address:

      DUX Logistics & Tech Services GmbH, Neben dem Mühlweg 20, 65474 Bischofsheim ...