Getting Started with Raspberry pi and Node.js

This post is part 1 of 9 in the series Raspberry Pi
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Getting Started with Raspberry pi and Node.js

Did you know that there will be 6.18 billion devices connected to the internet by the end of 2014 and a whooping 19.42 billion devices between 2015 and 2017. Imagine the fight for bandwidth!

With so many devices connected to the Internet, the next big thing for us is the “Internet of Things” or the IoT.  If you do not already know what Internet of Things is, check out this video

So what can we really do with IoT, take a look at this

Awesome right! A piece of hardware, some internet and a world full of opportunities.

This post marks the beginning of a bunch of posts that are targeted at integrating Hardware/embedded devices like sensors and motors with the internet and build meaningful and smart apps that would know and do things as per your instructions taking us one step closer to pure Artificial Intelligence!

In this post, we will take the first few tiny steps towards IoT. For most of the experiments, I am going to use Raspberry Pi B+. And as you might have guessed, all the programming we are going to do will be in Javascript.

First we will take a look at connecting our pi to our computer and next, we will install Node.js.

So, let us get started

What is Raspberry pi?

Purchasing a Pi

I am not going to provide links on where and how you can purchase Raspberry pi. But if you have issues locating one in your neighbourhood, do drop a comment and I can help you.

Connecting Pi to your Computer

We will take a look at connecting the pi to both a Mac as well as Windows machines. There are numerous ways out there how you can connect your pi with your computer. I found the below method to be the easiest.

To connect the pi with your computer, we will be using an Ethernet cable.

Ethernet-Cablesource

The assumption is that you are using a wifi connection to connect your computer to the internet.

As long as we are not detaching the pi from your computer, this way to connect to the pi should work fine. When required, I will put out instructions to connect your pi via a USB wifi dongle.

Setup Pi on your mac

Step 1 :  Insert the SD card into place on your Raspberry pi

Step 2 : Connect the power cable to the pi. You should see a red light blinking on the board

Step 3 : Connect one end of the ethernet cable to your pi and connect the other end to your mac

Step 4 : We will setup a shared network between your Mac and the pi. The Mac will share its network with pi over the ethernet cable.

For that, on your Mac, open System Preferences.

Screen Shot 2014-10-02 at 2.20.46 pm

Click on sharing and enable Internet sharing from the left tree as show below.

Screen Shot 2014-10-02 at 2.21.12 pm

On the right hand side, select Ethernet. This will now enable  Internet sharing between your Mac and any device you connect on your ethernet port.

Step 5 : Now, Open a new terminal and run

arp - a

And you should see something like

Screen Shot 2014-10-02 at 2.25.36 pm

Note : If you do not see any devices listed after you enable the ethernet sharing, switch off the pi wait for 10 seconds and start it back on. Now run the above command again and you should see the list of ip addresses.

One of the above listed ip addresses belongs to your pi. I do not have a sure shot way of telling which one. So we will be taking each ip address and running the below command

ssh pi@192.168.1.101 

After testing out all, I came to know my pi’s ip address is 192.168.2.2 . So, when I run  ssh pi@192.168.2.2, it will ask for my password.

The password for your pi is raspberry. And once you are successfully authenticated, you should see this

Screen Shot 2014-10-02 at 2.30.01 pm

Now, you are successfully connected to you pi!

Step 6 : Connect to the pi’s GUI. From the command prompt shell (which we established above), run

sudo apt-get install tightvncserver

This will install tightvncserver on the pi. Using this, we can interact with the pi’s gui using our mac’s keyboard and mouse.

After tightvncserver is setup, we need to setup a password run

tightvncserver

Now, to enable sharing your pi’s GUI, run

vncserver :0 -geometry 1920x1080 -depth 24

This will start vnc sharing. Now, on you Mac, open up safari and navigate to

vnc://192.168.2.2

from the address bar. This is the ip address of the Mac. Safari will prompt for the ip address again. Press enter and a screen sharing should start.

Voila!! your Raspberry pi’s GUI from your Mac!

Screen Shot 2014-10-02 at 2.42.15 pmThe above process is simple but the only problem is, we need to run

vncserver :0 -geometry 1920x1080 -depth 24

every time we restart the pi.

To work around that, we will add this command to the list of boot tasks. So as soon the pi boots, the vncserver will start.

For that let us go back to the ssh shell.

run the following commands in sequence

sudo su

This will switch to superuser

cd /etc/init.d/

Next, we will create a new file named vncboot. Run

nano vncboot

Copy everything from below and paste it in the window

and it should like

Screen Shot 2014-10-02 at 2.57.25 pm

Now press ctrl + x and you will be asked to save the file (bottom of the screen). Press Y and you will be asked for the file name. Name it vncboot. Press enter and you should be out of the nano editor.

Now, we will set up permissions to make this file executable. Run

chmod 755 vncboot

Finally we will enable dependency based boot sequencing. Run

update-rc.d vncboot defaults

And you should see a console out like

Now, we will test this out by rebooting pi. Back to the ssh terminal run

reboot

And you should see a log like

And the connection will be terminated. Lets  give ~30 seconds time for the pi to reboot.

Back to Safari, we will launch a new vnc connection as we did earlier and you should see the pi desktop.

If you see a message like

Screen Shot 2014-10-02 at 3.21.27 pm ssh into your pi and run the following commands

Now setup the password. Reboot the pi and you should be able to connect to your pi using vnc on bootup.

Note : All the above instruction are taken from here.

Setup Pi on your Windows

Step 1 :  Insert the SD card into place on your Raspberry pi

Step 2 : Connect the power cable to the pi. You should see a red light blinking on the board

Step 3 : Connect one end of the ethernet cable to your pi and connect the other end to your PC

You can follow this easy to set up video to connect your pi to your windows machine

Once you get the ip address, please follow step 6 from above. Instead of using Safari, we will use tightvnc software to view the screen on windows.

You can find all the instruction to run Tightvnc on windows here.

If you want to interact with the pi over command line, you can install putty and then tunnel through to the pi.

Now that we have connected pi to our computed, we will go ahead and install Node.js on pi.

Installing Node.js on pi

If you are new to Node.js, I would recommend going through the following posts

  1. What is Nodejs?

  2. Hello Node

  3. Node.js Design Patterns

You can run the below steps over ssh or you can run it using xterminal (as root) from the GUI. I will be running the below steps from the terminal (ssh on Mac/putty on windows). This will take comparatively less time when working with a GUI.

First we will update and upgrade our pi. Run

sudo apt-get update -y && sudo apt-get upgrade -y

This will take quite some time, if you are running this for the first time. (~ 1 hour)

Next, we will download the latest version of Node-ARM

wget http://node-arm.herokuapp.com/node_latest_armhf.deb

Install it by running

sudo dpkg -i node_latest_armhf.deb

If everything works fine without issues, you can run

node -v

and you should see the installed Node’s version.

You can also start off a Node REPL and log something like

Screen Shot 2014-10-02 at 5.46.31 pm

Hope this post gave you a decent idea as how to setup Node.js on the Pi. If you think there is a more easy way of connecting the Pi to a computer, please do share.


Thanks for reading! Do comment.
@arvindr21

Series NavigationRaspberry Pi, Node.js and a LED – Emit Morse Code >>
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  • Rahul Yennu

    if you got error while unpacking “sudo dpkg -i node_latest_armhf.deb” try these steps
    1)sudo apt-get remove nodered
    2)sudo apt-get remove nodejs nodejs-legacy
    3)sudo apt-get remove npm
    4)curl -sL https://deb.nodesource.com/setup_4.x | sudo bash –
    5) sudo apt-get install -y build-essential python-dev nodejs npm
    6)sudo dpkg -i node_latest_armhf.deb

  • Magdalena Patronska

    Any suggestions on the following error:

    dpkg: regarding node_latest_armhf.deb containing node:

    nodejs-legacy conflicts with node

    node (version 4.2.1-1) is to be installed.

    node provides node and is to be installed.

    dpkg: error processing archive node_latest_armhf.deb (–install):

    conflicting packages – not installing node

    Errors were encountered while processing:

    node_latest_armhf.deb

    Thanks.

  • Bob Johnson

    my installation seems to quit at “Processing main triggers for man-db …” any Idea how to fix

    thx
    Bob

  • yuvraj upadhyay

    it was good but atleast one example should have been discussed over here perfectly i mean wd all the steps one by one so that even the beginners could get it at first instance

  • dhananjay shantaram janorkar

    Circumference of Circle / Diameter = Goba, 6283185306 /
    2000000000 = 3.141592653 Constant of Goba is RATIONAL NUMBER.

    Reference:

    Editorial of International Journal of Shantaram Janorkar
    Foundation of Mathematics, Science and Spiritual. – Edition – 1, 15 September,
    2015, Volume – 1, Issue – 1, ISO 9001:2008, ISSN (P): 2454-5236, ISSN (O):
    2454-633X, Title Code: MAHBIL06980/13/1/2014-TC / For Books – ISO 9001:2008,
    ISBN: 978-81-930845-0-2, (English and Marathi). (FREE DOWNLOAD from
    http://www.sbjanorkar.com)

    (i) (Circumference of a Circle / Diameter = Goba, 6283185306 /
    2000000000 = 3.141592653 Constant of Goba). The Self – Proving
    Theorem of Goba and its Explanation on the Basis of a Formula.

    (ii) E=Mm² Which means Energy = Mass x (Speed of Mass)², Speed of Light =
    22,32,00,00,000 Mile/Second. (Twenty two Hundred and Thirty two Cores Mile/per Second).

    (iii) 504,866,505,707,712,000 (Mile)³/Second The Extent of solar system.

    (iv) The Theorem of the Formula for the
    Explanation for the Creation of the Cosmos in the Large Hadron Collider
    Machine.

    (v) Point – The Theorem
    of Existence of Point and its Aspect.

    (vi) The Distance Between
    Shining Lightening as well as Thundering Cloud and The Earth.

    (vii) To do Research on the Research Done by Shantaram Bapurao
    Janorkar we Expect to Operation from World Educational Institute, Universities,
    Scholars, Scientists.

    Note:
    Hon. Sir, Please share this all of us.

    Link for Free Online International Journal ISO 9001:2008, ISSN
    (Print & Online):- http://www.sbjanorkar.com/Gernoul.html

    Link for Free Online Books ISO 9001:2008, ISBN: –

    http://www.sbjanorkar.com/booksd.html

    Respected Sir /
    Madam,

    This international journal has been launched in memory of my
    father and researcher late Mr. Shantaram Bapurao Janorkar by “Shantaram
    Janorakar Foundation of Mathematics” to scientifically establish the research carried out by him on
    the various topics of Mathematics and I have put my best efforts in this work
    disregarding my family and my children’s future. This is the biggest sacrifice
    made by me and this sacrifice has been done by me for my country. This
    sacrifice has been done for the students all over the whole world to enable
    them to achieve the true and real knowledge. I have been doing my research work
    at different levels for the last 18 years. To really establish this research,
    on 11 December, 2011, I received valuable guidance from Hon.Prof.Dr.T.M.Karade
    (D.Sc., D.Sc., Ex. Vice-Chancellor, Indiana University, Raipur, Ex. Dean,
    Faculty of Science, Nagpur University, Nagpur) and to scientifically establish this
    research I am also receiving valuable guidance from Hon.Prof.Dr.Shriram
    B.Patil (Ex. Head, Department of Mathematics, Ex. Chairman, Board of Studies in
    Mathematics, Ex. Dean, Faculty of Science, Mumbai University, Mumbai) Through this
    guidance, I found many ways about how I should scientifically establish all
    this research and by this Institute I have launched the journal “International
    Journal of Shantaram Janorkar Foundation of Mathematics, Science and
    Spiritual.” Through this medium I have been preparing various papers on
    this research in English and Marathi languages and publishing them serially in
    this journal. I have prepared the papers on this research and I have tried to
    convert them into scientific and mathematical language without leaving the basic
    core of the research topics which were invented by my father and researcher
    late Mr. Shantaram Bapurao Janorkar and keeping intact the meaning of his
    thoughts through scientific approach, I have compiled the theorems on various
    subjects and prepared research papers on these theorems. I have prepared these
    research papers by using various systematic methods and I have tried to explain
    everything and made use of methods which are easy and quick to understand for
    you. In case you do further studies on this research and prepare papers on the
    same we shall certainly publish them in this journal free of charge and you
    will be honored with a citation and award. I desire to publish this journal in
    all regional, national and international languages.

    This journal is in ‘Print/CD-ROM/Online’ formats. I have
    been trying to deliver this journal to the scholars and scientists of 511
    universities of India and to the scholars and scientists of 10,877 universities
    all over the world. I sincerely request to honorable scholars and scientists to
    continue further my present work. There is such a great extent of knowledge in
    this research work that the yet to be in completed research will be completed
    with this research and logic and the world will get to know the real and true
    knowledge and you can put new theorems before the world created through this
    research. To
    help this real and true knowledge put forward before the world is the very
    primary objective of my efforts. It is said that time and tide waits for none; ‘Death’ is the
    eternal truth for all living beings on earth. Hence, it is utmost essential to
    put forth my research paper in front of the world. I feel, after my death,
    there will be nobody to put forth or present this research paper in front of
    the world.

    Om Purnamadah: Purnamidam Purnat Purnamudachyate I Purnasya
    Purnamadaya Purna Mevavashisyate II

    In Geometry, the
    symbol of measurement accepted (World Official) by the world community of
    scientist is degree and this same degree is the root, evidence, origin and base
    of the entire research done by my father late Mr. Shantaram Bapurao Janorkar.
    The base of this entire research is measure of circle of 36 Degree.
    By transforming this research which is originally in Marathi language, into
    scientific and mathematical language I am publishing serially all the papers on
    this research in an international journals. To begin with, I have first
    prepared the papers on the theorems:

    ® The Self – Proving Theorem of Goba and its Explanation on the
    Basis of a Formula (Circumference of a Circle / Diameter = Goba, 6283185306 /
    2000000000 = 3.141592653 Constant of Goba). (Goba Cha Swayamshidha Sidhanta Wa Sutracha Aadharacha Spastikaran
    (Wartul Parigh / Wyas = Goba, 6283185306 / 2000000000 = 3.141592653 Goba Cha
    Sthirank), (In Marathi).

    ® Point – The Theorem of Existence of Point and its Aspect. (Bindu – Binducha
    Asthitwachi Shidhatha Wa Swarup, (In Marathi).

    ® E = Mm² Which means Energy = Mass x (Speed of Mass)², Speed of Light = 22,32,00,00,000 Mile/per Second. (Twenty two
    Hundred and Thirty two Cores Mile/per Second). (E=Mm² Mhanajhach Shakati = Wastuman x
    Wastumanacha Wegacha Varga, Prakashacha Wega = 22,32,00,00,000 Mail / Prati Second (Bavis Abja Batish Koti Mail / Prati Second, (In Marathi).

    ® The Distance Between Shining Lightening as well as Thundering Cloud and
    The Earth. (Chakaknari
    Wig Aani Gadgadnara Megha yanche Pruthavi Pasun Aantar, (In Marathi),

    ® The Theorem of the Formula for the Explanation for
    the Creation of the Cosmos in the Large Hadron Collider Machine.

    ® The Theorem of the Extent of the Solar systems. (Surya malecha wyapacha shidhanta, (In
    Marathi).

    ® A Personality called Shantaram Bapurao Janorkar. (Shantaram Bapurao
    Janorkar Yak Wyaktimahatava, (In Marathi),

    ® The Establishment of Shantaram Janorkar Foundation of
    Mathematics to Create a New History in Mathematics, Science, Philosophy & Spiritual. (Ganit, Vidhyan, Thatvadhyan Vaa Adhyatma Madhye
    Yek Navin Etihas Ghadavinya Karita Shantaram Janorkar Foundation
    of Mathematics Chi Sthapana, (In Marathi),

    ® To do Research on the Research Done by Shantaram Bapurao
    Janorkar we Expect to Operation from World Educational Institute, Universities,
    Scholars, Scientists. (Shantaram Bapurao Janorkar Yancha Sanshodhanavar Sanshodhan
    Honyakarita Vishavatil Shaishanik Savunstha, Vidhyapithe, Scholars,
    Shastradhyan Kadun Sahakaryachi Aaphekasha, (In Marathi), in mathematical language and in the transforming
    the research papers on “Goba” in mathematical language by making some
    modifications, Hon.Prof.D.T.Solanke has helped me while in the translation work of this research
    work from Marathi to English, I received cooperation from Hon.Mr.Vikram K.
    More
    and Hon.Prof.Dr.T.M.Karade provided me the
    guidance on how should the first
    paragraph of the research paper on “Goba” be read. The paragraph reads like
    this The value of an irrational number pi
    is determined from the ancient times up to the modern super computer era. In
    this paper author Late Shri Shantaram Bapurao Janorkar has conjunctured the
    rational number , Christened “GOBA”
    by introducing some concept with references to a circle is nomenclature is like
    π (Pi), but it is not an irrational number. Its value is computed as 3.141592653

    If you look at this research with the
    unselfish vision of a scholar, scientist (researcher) and if you carefully read
    the work published in this publication, you will easily understand the research
    work and ways for further research on this work can be found. In this research
    many new theorems have been established, different new methods have been found
    and in the same way many new theorems and methods will be found. I have made a
    deep study on this research and while deciding on which methods should be
    included in this paper and which methods are easier, I have came across some
    theorems in addition to this theorem and they follow as: For example,

    ® The Theorem of the Evolution or Creation of the Cosmos and Speed. (Wishavachi uttapathi kinva nirmiti vaa vegacha shidhanta, (In
    Marathi).

    ® The theorem of the Evolution or
    Creation of the Radius, straight radius, arc radius and
    diameter of Circle and the
    Circumference of Circle. (Wartul vaa wartul
    parighachi thrigha, saral thrigha, kauns thrigha Aani wyasacha uttapathi kinva
    nirmiti cha shidhanta, (In Marathi).

    ® The Theorem of the total number of planets-stars,
    solar systems and galaxies in the cosmos. (Wishava madhil
    graha-tare, Surya mala Aani Aakashagaangan
    – cha shidhanta, (In Marathi).

    ® The Theorem of the Extent of the Cosmos. (Wishavacha vyapacha shidhanta, (In Marathi).

    ® The Theorem of the definite Period taken by the Creation of the entire
    Cosmos (Saampurna
    Wishava nirmitila lagalelya nishyit welyecha shidhanta, (In Marathi).

    ® The Theorem of the Extent of the Black Hole in the Centre of Galaxies. (Aakashagaangan
    chya Madhya bhagi Aaslelya krushan vivaracha vyapacha shidhanta, (In Marathi).

    ® The Theorem of the Mental Speed (Manachya vegacha shidhanta,
    (In Marathi).

    ® The Theorems of the Numbers, Vedic 16
    Vowels, Vedic 36 Consonants and Their Symbolic Signs. (Aanka,
    vaidik 16 Swar, vaidik 36 vyanjane vaa thyanchya syanketik chinhyancha
    shidhanta, (In Marathi). With this,

    ® Squarization of a Circle = 5605 x 5605 = 31416025 / 10000000
    = 3.14160250 (Wartulache chaurasikaran = 5605 x 5605 = 31416025/10000000 = 3.14160250,
    (In Marathi). In spirituality on the basis of mathematical rules,

    ® Om – The Scientific Verification of Om
    and its Aspect. (Om – Om Che Wiadhyanik Drustya Shidhatha Wa Swarup, (In
    Marathi).

    ® Soul-The Verification of the Existence of Soul, Its Aspect and
    Nomenclature. (Aatmaa – Aatmaaya Chya Asthitwachi Shidhatha, Swarup Wa Namkaran,
    (In Marathi).

    I
    will try to publish in the next issue the further papers on this theorem. Hon.Mr.Dr.T.M.Karade,
    Prof.Dr.Shriram B.Patil, Prof.Dr.Kishor S.Adhav, Prof.Dr.S.D.Katore, Prof.Mr. D.T.Solanke have been
    regularly providing valuable guidance to me and therefore, I am very much
    grateful to them and I shall remain grateful to them forever. In case you find
    any difficulty in understanding the research papers published in this journals
    please send your queries in writing on the editorial address, I shall sincerely
    strive to solve them. You can contact me round the clock on phone or in person.
    This journal is being published by Om Publications, Mahan and it is ISSN, ISBN,
    RNI and ISO 9001:2008 certified.

    All the people, schools, colleges, educational institutes,
    educational boards, mathematical institutes, scientific institutes,
    universities, and the universities listed in the QS (Quacquarelli Symonds) scholars, scientists, researchers all over the world
    can subscribe annually free of charge from the web site http://www.sbjanorkar.com. You can download the e-copy of this international journal in
    PDF format from the web site http://www.sbjanorkar.com and I sincerely
    request you cooperate me in sharing it with your friends, teachers, students,
    schools, colleges, education institutes, education boards, mathematical
    institutes, scientific institutes, all the students of an university and people
    through your email as well as social sites such as Facebook, Google Plus,
    WhatsUp, Twitter, LinkedIn. I dedicate the first issue of this journal to the memory of my
    father and the researcher of this entire work, late Mr. Shantaram Bapurao
    Janorkar, the valuable research done by him, his trust in education.

    ® Mr.Dhananjay
    S.Janorkar (Chief Editor)

    The
    Function of Publication and Dedication to the World of the International
    Journal through Organization of Shantaram Janorkar Foundation of Mathamatics,
    Mahan

    On the occasion of the birth Anniversary of Late Mr. Shantaram
    Bapurao Janorkar, an International Journal of Shantaram Janorkar Foundation of
    Mathematics, Science and Spiritual, was published through Organization of
    Shantaram Janorkar Foundation of Mathamatics, Village MAHAN – 444 405 Tq. Barshitakli
    Dist. Akola, (Maharashtra State), India. On 15/09/2015 at evening 5.00 P.m. at
    Mahan at the hands of Hon. Professor Dr. Kishor Aadhav, D.Sc., (Head,
    Department of Mathematics, Sant Gadage Baba Amaravati University, Amaravati)
    and dedication of this International Journal to the World was performed at the
    hands of Hon. Professor Dr. S. D. Katore, (Chairman, Board of Studies in
    Mathematics, Sant Gadage Baba Amaravati University, Amaravati), Chief Guest was
    Hon. Professor Mr. D. T. Solanke, (Department of Mathematics, Sudhakar Naik
    & Umashankar Khetan College, Akola), The President of this function was Mr.
    Dhananjay S. Janorkar, (Founder President, Shantaram Janorkar Foundation of
    Mathamatics).

    Along with this international journal, Mr. Dhananjay Shantaram
    Janorkar has determined 504,866,505,707,712,000 (Mile)³/Second The Extent of solar system and
    160,704,000,000,000,000 (Mile)³/Second as diameter as per the principle of
    solar system invented by them. Along with this, numerous principle invention
    papers has been kept before the world through this International Journal and to
    investigate on this invention Mr. Dhananjay Shantaram Janorkar has created a
    new rostrum for global scholars like Ph. D. holders in respect of the same. The
    said international journal/Books can be downloaded free of cost at http://www.sbjanorkar.com
    on this web site. In the said programme Deputy Sarpanch of Mahan, Mr. Pramod
    Bhadange, Smt. Sulbhabai Shantaram Janorkar, Ex-Chairman, Panchayat Samati
    Barshitakli also Secretary of organization Mrs. Jija Dhananjay Janorkar, Mr.
    Dilip Lande Guruji, Mr. Sanjay Ambarkar, Mr. Prabhakar Janorkar, Mr. Uday
    Janorkar, Mr. Suvarnesh Janorkar, Dr. Nitin Janorkar, Mayur Jangle, Rishikesh
    Janorkar, Jay Janorkar and Janorkar family were present at the function.

    Shantaram Janorkar
    Foundation of Mathematics,

    Village MAHAN – 444 405 Tq. Barshitakli Dist. Akola

    Head Offices:- C/o R.T.Patil House, Near Saraswati

    Vidyalaya, Nityanand Nagar, Gorakshan Road,

    Akola – 444 404, (Maharashtra State), India.

    Phone (Mob): 09021607450, 09226442256

    E-mail: [email protected], [email protected]

    http://www.sbjanorkar.com

    Note:
    Hon. Sir, Please share this all of us.

    Link for
    Free Online International Journal ISO 9001:2008, ISSN (Print & Online):- http://www.sbjanorkar.com/Gernoul.html

    Link for
    Free Online Books ISO 9001:2008, ISBN: –

    http://www.sbjanorkar.com/booksd.html

  • Karthik Naidu

    I want to say Thank you…but i feel its not enough…I want to say something more which I don’t have words… For now #respect, #inspiration

    • http://thejackalofjavascript.com/ Arvind Ravulavaru

      Thanks Karthik. Very happy that the post was helpful!

  • thethundering1

    Hi Aravind, Nice article.
    Can you tell me where to buy this device.

    Thanks
    Srinivas

    • http://thejackalofjavascript.com/ Arvind Ravulavaru

      Thanks Srinivas. You can buy a pi online quite easily. Try eBay.

  • Marc

    Aravind, all the code snippets is not in there anymore :)
    Thanks for your awesome blog!!

    • http://thejackalofjavascript.com/ Arvind Ravulavaru

      Thanks.

  • Thiruanvukkarasu Muthuswamy

    Hi Aravind – Thanks for the post. It really helps :) Between i got pi connected to the windows as mentioned in the video. But i unable to access the internet which is connected to my host computer. How should i resolve that ?