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Raspberry Pi 3 & MathWorks Learn-to-Program Pack - Review

Scoring

Product Performed to Expectations: 10
Specifications were sufficient to design with: 10
Demo Software was of good quality: 10
Product was easy to use: 10
Support materials were available: 10
The price to performance ratio was good: 7
TotalScore: 57 / 60
  • RoadTest: Raspberry Pi 3 & MathWorks Learn-to-Program Pack
  • Buy Now
  • Evaluation Type: Workshop Tools
  • Was everything in the box required?: Yes
  • Comparable Products/Other parts you considered:
  • What were the biggest problems encountered?: Problem of incompatibility of the OS when installing MATHWORKS-RPi add-ons environment "Support Package for Raspberry Pi Hardware". Lack of program block for RPi 1-wire interface in "Support Package for Raspberry Pi Hardware". Minor issue with RPi window resolution when working remotely using VNC. And...the extremely huge range of MATHWORKS application possibilities - hard to choose most important issues to test... apologies it was a joke!

  • Detailed Review:

    RPI-start

     

     

     

     

    Introduction

     

    When I received the e-mail approving me as the Raspberry Pi 3 & MathWorks tester, I felt the happiness and also sense of responsibility.

    The subject is extremely deep and wide.

    Both Raspberry board (and all relating stuff) as well as MATLAB/ SIMULINK environment are widely well known for years (despite the RPI is significantly younger, whatever!)

    I admit, I know the raspberry from, let say, its early ages, I use it for around two years, nevertheless It's really hard to add something new as most of fields of RPi application, have been implemented, above concerns also the use of RPi together with MATHWORKS. On the other hand, there is still something new added and developed in the RPI realm.

    MATLAB and obviously Simulink is another issue for me. I've been used different math supporting environments from my studying time (who remember "Derive" system for DOS?) . In one's time I enthustiately worked with MATHCAD but nowadays I prefer R (Cran system).

    I know there are no comparison with SIMULINK in the matter of complex modeling, simulation and analysis. The scope of implementation is shocking and extremely huge.

    With limited writer's abilities I will focus on simple explanation of my steps in this roadtest, I hope pictures and several videos would make my report more colorful and accessible.

     

     

    Basic technical specifications

    Honestly, I think that this part can be omitted as there are lot of information about both RPi and MATHWORKS.

    Moreover Raspberry is, in my opinion, one of  the "flagship" devices of Element 14, detaily depicted and still commented in the forum.

    Ok, lets put here most common information from raspberrypi.org  https://www.raspberrypi.org/products/raspberry-pi-3-model-b/

     

    The Raspberry Pi 3 is the third-generation Raspberry Pi. It replaced the Raspberry Pi 2 Model B in February 2016.

    • Quad Core 1.2GHz Broadcom BCM2837 64bit CPU
    • 1GB RAM
    • BCM43438 wireless LAN and Bluetooth Low Energy (BLE) on board
    • 40-pin extended GPIO
    • 4 USB 2 ports
    • 4 Pole stereo output and composite video port
    • Full size HDMI
    • CSI camera port for connecting a Raspberry Pi camera
    • DSI display port for connecting a Raspberry Pi touchscreen display
    • Micro SD port for loading your operating system and storing data
    • Upgraded switched Micro USB power source up to 2.5A

     

    All details related to the could be found here

     

    https://www.mathworks.com/products/matlab.html

    The system consist of two main elements MATLAB and SIMULINK creating amazing tool for all project concerning mathematical modeling, analyses, simulations. From simple calculations, using very simple intuitive script language to complex problem solving with enhanced but still easy to operate graphic environment (GUI). According to the definition, MATLAB is a high-level language and interactive environment that solves numerical problems quickly.

     

    Some basic words from MATHWORKS commercial site:

     

    System can be used to capture and analyze sensor data by communicating with Raspberry platform (as well as i.e. Arduino).

    It allow to take Simulink - block diagram environment for simulation and Model-Based Design. We can model, simulate and analyze the project then program the hardware using graphical block diagrams.

     

    According to the advertisement it " Models for Every Project".

     

    Unpacking

    Can I repeat - from my previous test?...

    "There is nothing better than opening the package with brand new, sophisticated electronic device (for me at least…)"

    RPi package

    Our sweet raspberry came safely and well packed in the pleasant, colorful box.

    One can complain, the box was oversized, but as I think the safety of the content is most important.

    You can find basic instructions before opening the box

    The set consist of

    • Raspberry Pi 3 board
    • 16GB MicroSD Card
    • MicroSD card to SD Card Adapter
    • Power Supply with universal AC system adapters
    • Convenient enclosure

    RPi in the enclosure1

    RPi in the enclosure closed

    The set of the AC supply adapters provides the compatibility with the every Energy System.

    AC1

    AC2

     

    The MATLAB and Simulink Student Suite:

    The student suite includes MATLAB, Simulink and 10 add-on products with Hardware Support Packages for Arduino, Raspberry Pi and more.

    The 10 add-on products include toolboxes for control systems, data acquisition and instrument control, DSP system design, image processing, optimization, signal processing, statistics and machine learning, and symbolic math.

    • Model hierarchical subsystems with predefined library blocks
    • Simulate the dynamic behaviour of your system and view results as the simulation runs
    • View simulation results and debug the simulation
    • MATLAB and Simulink Student Suite includes MATLAB, Simulink, and 10 add-on products.
    • Simulink has built-in support for prototyping, testing, and running models Raspberry Pi.
    • MATLAB Mobile lets you access MATLAB from your mobile device.
    • Student software runs on Windows, Mac, and Linux.

    Technical documentation overview

    Well I didn't  find many special documents inside. Some safety issues - regarding to requirements and regulations. For me It's correct. All necessary information you can find on the net... before the parcel arrived, so you can be well prepared to use the brick when you open the box.

     

    First switching on

    Raspberry launch

    It's simple and pleasant, nevertheless system downloading is time consuming depending on the net connection quality.

    The simplest solution is to take the NOOBS system installation option, ready to use, delivered on the SD Card.

    "Out Of the Box Software" NOOBS is user friendly and intuitive indeed!

    NOOBS is an easy operating system installer which contains Raspbian. It also provides a selection of alternative operating systems which are then downloaded from the internet and installed.

    On the other hand you can prepare the SD card individually, using SD card image burner (I tried  Etcher) It's more convenient if there is the problem with fast enough internet access etc.

     

    For me, the good habit using RPi is starting the job with update/ upgrade commands:

    sudo apt-get update

    sudo apt-get dist-upgrade

    I try to keep the system fresh!

    It looks like here:

     

    Another worth to remember and repeat systematically thing is SD card backup policy.

    The process time depends on the quality of the used storage media.

     

     

    Software review

    At this place I must admit, that the bundle most attractive part for me is MATWORKS suite.

     

    At the beginning of the roadtest I was afraid,  that I'm able to test only small part of this amazing environment.

    Ending the report, making final corrections, I'm still sure, I know, that there are huge capabilities of this suite. I hope I will continue exploration of the matlab, sharing my discoveries and thoughts on the element14 platform.

     

    My experiments with TRIAL

     

     

     

    what's going on?...

    You can extend the basic suite:

    Several minor problems was easy to manage:

    Is it quick?

    Everything is relative, it depends on the connection quality ... and your patience...

    I want to admit, at this point, that you don't  need to worry about interrupts or lose of internet connection during installation,

    Despite of my fear, after the unsupposed break, installation continued from the last point, not the beginning!

     

    My patience was rewarded

    Voila:

    In the purpose to enjoy best graphic capabilities, you should switch on Open GL in your system!

     

    30 days of unlimited access to all MATHWORKS functionalities past quick. When the message about TRIAL period turn to 0:

    I switched (associate) to my licenced package.

     

     

    The process is quick and carefree!

     

    I had the issue with licence files in C:\Program Files\MATLAB\R2017b\licenses. I had to delete the "licence" connected to the trial and everything work well!

     

    Comparison of trial  and Student licences:

     

    TRIALMATLAB and Simulink Student Suite
    Trial PackageStudent - Individual
    MATLABMATLAB
    SimulinkSimulink
    Communications System Toolbox------------------------------
    Control System ToolboxControl System Toolbox
    DSP System ToolboxDSP System Toolbox
    Data Acquisition ToolboxData Acquisition Toolbox
    Image Processing Toolbox
    Instrument Control ToolboxInstrument Control Toolbox
    Optimization Toolbox
    Signal Processing ToolboxSignal Processing Toolbox
    Simulink Control DesignSimulink Control Design
    Stateflow-----------------------------------
    System Identification Toolbox---------------------------------
    Statistics and Machine Learning Toolbox
    Symbolic Math Toolbox

     

     

    Following, you can find some my complains regarding lose the   System Identification Toolbox

     

     

    Installation of Add-Ons

    More challenging issue related to environment installation is installation of MATLAB and SIMULINK Support Package for Raspberry Pi Hardware

     

     

     

     

     

     

     

     

    I forgot of SSH enabling - the results below:

     

         

     

    Basic, preliminary tests

    Having the whole system prepared I enthusiastically wanted to test how it work together.

    The simplest way to check the functionality of MATWORKS packages designed for Raspberry Pi is, according to the documentation execute of raspi command:

     

    Unfortunately I encountered serious problem with building the MATLAB I/O system on RPi

     

    I was trying this:

    ...but still unsuccesfully...

     

    Well, I lose several days looking for the answer.

    The solution was easy and came from another Roadtester - THANK YOU AGAIN!

    Just replacement of the two files and several commands, the system is working!

     

    Now, using simple code I checked if I can operate RPi using MATLAB

    On the following video I present the use of basic raspi function application.

    The Matlab lets me control of the LED 0 on the RPi.

     

     

    In the SIMULINK, there are intuitive solutions to communicate and control the RPi unit.

    Using command blocks from libraries I could build any project.

    I started with the simplest one, described here:

    "Getting Started with Simulink Support Package for Raspberry Pi Hardware"

    https://www.mathworks.com/help/supportpkg/raspberrypi/examples/getting-started-with-raspberry-pi-hardware.html?s_tid=src…

     

    Details are presented on the following video

     

     

    My first project

    To be honest, the project is not main but very popular, used  as the first example of temperature measurement and application of 1-wire protocol in Raspberry.

    The sensor is well known Dallas 18B20.

    moj DS18B20

    Using the simple breadboard layout I found in the net: "Raspberry Pi: Measure, Record, Explore."

     

    Znalezione obrazy dla zapytania rpi3 ds18b20

    The humble temperature measuring plant looks like here:

    RPI & DS18B20

    After initialization of the 1wire port, the temperature can be read using one command:

     

    In the video below, you can see the results:

    Here I want to complain a little. Maybe I looked for it in the libraries inattentively, but I didn't find 1wire library for RPi in the Simulink.

    There are lot of materials and examples for arduino but regarding RPi I found nothing.

    Honestly mentioned previously problem with raspi and lack of simple access from Simulink to 1wire in RPi spoiled my plan and the most important test failed.

     

    Data Import and Export

    Having RPi set as temperature logger, with the set of temperature readouts, I wanted to check possibilities of MATLAB in simple data import and visualization.

    Following images show my steps in this example:

     

     

     

     

     

    In the following video, you can see, how I imported and presented the data - temperature readouts

     

    Use of the examples from MATHWORKS:

    Usage of most examples is simple as you need only write one command in the MATHCAD to initiate the demo.

    Bouncing Ball

    My first example - exercise of use of the Simulink, taken from the huge examples library on Mathworks site was

    Simulation of a Bouncing Ball

    The principle is elementary as follow:

     

    And the model also relatively simple:

    Without any problems I reach following results:

    changes of position and speed of the ball are easily presented on the chart:

     

     

    Thermal Model of a House

    The next example was more complex. It was interested for me, as the subject is very close to my projects related to energy efficiency in HVAC installations.

    Here we have:

    https://de.mathworks.com/examples/simulink/mw/simulink_product-sldemo_househeat-thermal-model-of-a-house?s_tid=examples_p2_Topic

    According to the description, This example shows how to use Simulink to create the thermal model of a house.

    This system models the outdoor environment, the thermal characteristics of the house, and the house heating system.

    The most interesting issue is possibility to present supposed energy consumption and its cost.

     

     

     

    The next, even more interested example, I tried to see and test:

    The model is a house heating system that includes a heater (plant), thermostat (controller), and room (environment).

    https://www.mathworks.com/help/simulink/examples/thermal-model-of-a-house.html

    doesn't work unfortunately!

    Execution of Ssc_house_heating_system  gives the error in my case.

     

    Automation is my realm and probably most vintage automation engineer (or at least me) is keen on PID regulation principles.

    Therefore I decided to test some

    PID examples

    I found very interesting examples of use simulink for modeling and  control

    The Control Tutorials for MATLAB and Simulink (CTMS) is located here:

    http://ctms.engin.umich.edu/CTMS/index.php?example=Introduction&section=SystemModeling

    Examples are simple but I quickly learned how to use SIMULINK building automation process models.

     

    Mass-Spring-Damper System

    The free-body diagram for this system is shown below. The spring force is proportional to the displacement of the mass,

    and the viscous damping force is proportional to the velocity of the mass,

    Both forces oppose the motion of the mass and are, therefore, shown in the negative -direction. Note also that

    corresponds to the position of the mass when the spring is unstretched.

    Below, you can see results of my tests:

     

     

    Above chart shows behaviour of the body when the external force as well as spring force acts.

    The modeling of proportional controller seems to be perfect.

    PID

    My attempts to model and tune the PID regulator are shown below

     

    Thanks to the CTMS, I found the automatic PID tuning functionality of Simulink

    It works great as you can see

     

    I attached the video from my tests of the PID experiments  in yhe Simulink

     

     

    Licence limitation problem

    Trying to retrieve some coding ideas from my youth

    I looked to the project examples archive looking for runde-kutta solutions for 4thorder

    As I remember form my student time nice implementation of these are the pendulum modeling issues.

    I found quite nice:

    https://www.mathworks.com/help/ident/examples/classical-pendulum-some-algorithm-related-issues.html?s_tid=srchtitle

     

    It was working fine on the TRIAL version - where all packages were available.

    Unfortunately after switch into licenced, student version, the example can’t be used.

     

     

    To use 'iddata', the following product must be licensed, installed, and enabled:  System Identification Toolbox 

    Lack of the licence for System Identification Toolbox is the problem here.

     

    Never mind, another pendulum model:

    Modeling a Foucault Pendulum

    works fine with the Student Edition

     

    You can watch it on the following video:

     

    Matlab online

    https://matlab.mathworks.com/

    I must praise that very useful solution is online matlab version.

    It's perfect solution which made me free, independent from the access to my computer.

    Cloud based solutions are popular and Mathworks used it perfectly.

    example below:

     

     

     

     

    VNC in the Raspberry

    Probably it's very old and frequently repeated notice but I will still glorify the simplicity of use of remote control of RPi using VNC.

    It helps very much if the brick is located in "strange" place or it is used in extraordinary project.

    My tests were conducted having RPi on laptop's screen.

    The only issue is resolution. If RPi starts without the monitor, the default settings make the screen difficult to tune-up as well as minimum resolution is... big too much.

    Sometimes RPi windows oversize main window, which make troubles.

     

    ThingSpeak

    - is the perfect tool to upload data e.g. from RPi sensors. The engine belongs to Mathworks, which make it perfectly compatible with our subject.

    According to the definition, Thingspeak is an IoT platform that enables collecting, store, analyze, visualize,

    and act on data from sensors or actuators from devices as Raspberry, Arduino etc.

    Unfortunately, I neglected Thingspeak capabilities during my roadtest

    but this part will be continued in my following projects with RPi & Simulink.

     

    Comparison of Raspberry versions

    The first Raspberry Pi - 1 Model B was released in February 2012, Model A was simpler and cheaper.

    Raspberry Pi 1 Model B+ was released In 2014,

    Raspberry Pi 2 which extended RAM was released in February 2015, It could be up to 14 times faster than a Raspberry Pi 1 Model B+

    Raspberry Pi 3 Model B was released in February 2016     is told to be 10 times the performance of a Raspberry Pi 1

    simple comparison is presented in the following table

    Conclusions

    My experiments and tests show, how powerful and interesting is the set: Matlab+Simulink & Raspberry Pi.

    This roadtest is only the beginning of my adventure with that amazing program suite and charming device.

    I feel, that probably I've lost too much time experimenting with MATLAB and Rpi separately, adding unsupposed problem with the integration,

    I didn't have enough time to finish my test related to temperature control using Rpi as PID controller, all governed using Simulink.

    This task will be conducted and I hope to report the results on this forum soon.

     

    pros

    I must confirm, that according to the advertisement, Mathwork products capabilities fulfill advanced requirements for analyzing data, developing algorithms or creating models.

    It is intuitive, supported by excellent help as well as worldwide Matlab/ Simulink environment enthusiasts associated on many forums.

    RPi is also very convenient, thanks to its versatility. Same as above, myriads  of forums, examples and advices will not allow you to feel lost when encounter hardware or software issue.

     

    cons

    Incompatibility of system version, when installing MATLAB and SIMULINK Support Package for Raspberry Pi Hardware,

    resulting errors when building the MATLAB I/O server on RPi,

    resolution problem when using RPi remotely with VNC,

    lack of 1wire library for RPi in the Simulink.

    Talking about Matlab, i admit, the price is, let say, delicate and relative issue. I don't know the pricing policy in different countries but I'm afraid for many students, or even universities,the suite is unavailable because of the costs. I hope I'm wrong.

     

    Bibliography

    MathWorks papers                    The MathWorks, Inc.                                                     www.mathworks.com

    Raspberry papers, manuals      Raspberry Pi                                                                 www.raspberrypi.org

    CTMS tutorials                          Control Tutorials for MATLAB and Simulink (CTMS)      ctms.engin.umich.edu/CTMS

     

    Thank you again for selecting me as the roadtester and give me the opportunity to deal with these extraordinary and amazing tools.

    Marek


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