• 10
      Jul - 2018

      Android Things
      2 min | 1626

      #ProjectDIVA: Arduino Mini Pro

      Android Things | 2 min | 1626

      android things
      arduino mini pro
      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.



      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

      1 min | 717

      Unboxing AIY Vision Kit. A surprise like #KORGER!

      General | 1 min | 717

      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

      2 min | 2715

      #MicroPython: Camera stabilisation application

      MicroPython | 2 min | 2715

      camera stabilization.
      micro servers

      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

      1 min | 1122

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

      General | 1 min | 1122

      online sas

      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 | 1425

      #TI: SensorTag working on Android 8.1

      Android Things | 1 min | 1425

      android studio
      sensor tag
      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

      4 min | 8956

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

      MicroPython | 4 min | 8956

      sense environment

      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 | 1015

      #ProjectDIVA: Android Things v1.0!

      Android Things | 1 min | 1015

      android things
      sensor mesh
      sensor tag

      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

      9 min | 8040

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

      Analytics | 9 min | 8040

      embedded systems
      raspberry pi

      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

      2 min | 16902

      #Tutorial: Portainer for local Docker environments on Windows 10

      Analytics | 2 min | 16902

      data science
      docker enviroments
      docker management
      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 | 1227

      #ProjectDIVA: Android Things 0.8.1 getting started

      Android Things | 3 min | 1227

      android things
      raspberry pi
      sensor mesh

      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

      3 min | 1697

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

      General | 3 min | 1697

      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 ...

    • 13
      Apr - 2018

      1 min | 646

      #General: We are at the Hannover Fair 2018!

      General | 1 min | 646

      hannover fair
      hannover messe
      industry 4.0

      I am really happy to inform you that I will be at the Hannover Fair 2018. The Institute of Mechatronic Systems will be represented by our research group "Integrated Systems and Machine Learning" in the Hall 2 on Stand B08 and we will be presenting solutions for the advancing digitization of industrial production.

      The Hannover Fair 2018 takes place between Apr 23, 2018 and Apr 27, 2018 in Hannover.

      For more info, click here:

      Hannover Fair 2018

      You find the map below:

    • 12
      Apr - 2018

      1 min | 1599

      #Ubuntu 16.04 LTS: Broken SD Card Reader Support

      General | 1 min | 1599

      sd card readers

      I am writing this post as a tutorial or a 'keep' note for myself, but I think it could be interesting for a lot of people. At work I'm using a Latitude Dell Laptop with dual boot (Ubuntu 16.04 LTS and Windows 10). The laptop has a SD card reader. Usually I work under Ubuntu while I am programming, and the SD card reader support is broken! But typing the following on a terminal, makes it works again:

      sudo rmmod sdhci_pci sdhci_acpi sdhci
      sudo modprobe sdhci debug_quirks2="0x10000"
      sudo modprobe sdhci_pci sdhci_acpi sdhci

      It seems to be a problem since Linux kernel version 4.1.8. A bug report he...

    • 01
      Apr - 2018

      Real Time Systems
      5 min | 3323

      #Raspberry Pi: The N-queens Problem (benchmark) Preempt-RT vs. Standard Kernel

      Real Time Systems | 5 min | 3323

      n-queen problem
      raspberry pi
      standard kernel

      N-Queens Problem: A Benchmarking Solver for Raspberry Pi

      The N-Queens Problem/Puzzle is a well-known problem that consists of placing N chess queens on an N × N chessboard so that no two queens attack each other. For example, one possible solution to the N-queens problem for N = 4 is the following:

      N-queens problem (N=4)
      Fig. 1: N-queens problem example (N = 4). Source: Google Optimization Tools

      As you can see, no two queens are on the same row, column or diagonal. Usually the problem consists to find all possible solutions, rather than one optimal solution.

      I wrote a script in Python that calculates ...

    • 01
      Apr - 2018

      Real Time Systems
      3 min | 5604

      #Rapberry Pi: Preempt-RT Kernel Performance on Rasbperry PI 3 Model B+

      Real Time Systems | 3 min | 5604

      raspberry pi 3 B plus

      The Raspberry Pi 3 Model B+ (Fig. 1) is now on sale and I bought one two weeks ago. The main modifications are the followings:

      • A 1.4GHz 64-bit quad-core ARM Cortex-A53 CPU
      • Dual-band 802.11ac wireless LAN and Bluetooth 4.2
      • Faster Ethernet (Gigabit Ethernet over USB 2.0)
      • Power-over-Ethernet support (with separate PoE HAT)
      • Improved PXE network and USB mass-storage booting
      • Improved thermal management
      Raspberry Pi 3 B+
      Fig. 1: Raspberry Pi 3 Model B+

      The Raspberry Pi uses now the LAN2515 chip from Microchip instead of the LAN9514 for Ethernet and the USB Ports.

      If you are looking for some Benchmarkin...