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    Abhay P A

    @Abhay

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    Raspberry Pi Hackers

    Best posts made by Abhay

    • How to use Raspberry pi4 without display and keyboard with a VNC viewer.

      Raspberry Pi

      Screenshot from 2020-04-22 06-58-09.png

      The Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and in developing countries. The original model became far more popular than anticipated, selling outside its target market for uses such as robotics. Usually, it does not include peripherals (such as keyboards and mouse ) or cases but they can be attached via the USB ports

      Download the os image: https://www.raspberrypi.org/downloads/raspbian

      rpi image download.png

      Then flashing the memory card for booting os (minimum 8 GB recommended, can use balenaEtcher)
      After flashing open boot directory from the memory card

      • Create an empty file and rename it ssh (remove extensions if any)
      • Create another empty file and rename it wpa_supplicant.conf
      • Open wpa_supplicant.conf and copy the below code
        country=US
        ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
        update_config=1
        network={
        ssid="NETWORK-NAME"
        psk="NETWORK-PASSWORD"
        }

      Replace “NETWORK-NAME” with your network name and
      “NETWORK-PASSWORD” with the password of your network

      Find the IP of raspberry-pi (Rpi)
      You can install the Fing app in your smartphone and connect it to the same network as Rpi.
      Then find the IP of Rpi.

      Install PuTTY SSH client

      putty.png

      • Type the IP of Rpi in the Host Name.
      • Then click open. Then a terminal opens asking your username and password. By default, the username will be pi and password raspberry.
      • Type sudo raspi-config.
      • In the window that appears activate VNC by moving the arrow key.

      Now to use VNC viewer
      Download it from:https://www.realvnc.com/en/connect/download/viewer

      • Install VNC viewer
      • Enter the IP of pi in the window that opens.
      • Enter the username and password.

      If the display is not available
      Type sudo raspi-config
      Go to advance settings.
      Adjust resolution by selecting the appropriate one.

      posted in Raspberry Pi
      Abhay
      Abhay
    • List of hackathons and price offering for solving different COVID-19 problem space

      The world is going through a tough time, COVID-19 has struck every nation badly. Various Government and Non-Government bodies are calling for the collaborations of makers and the public to put their skills to use during the time of isolation for solving different COVID-19 problem space.
      This post contains 12 such calls:

      • 1) Technology Development Board
        27th March 2020
        The Technology Development Board invites proposal applications from Indian companies and enterprises to address protection and home-based respiratory intervention for COVID-19 patients.

        http://tdb.gov.in/wp-content/uploads/2020/03/Doc1-1.pdf
        Screenshot from 2020-03-25 08-52-47.png
        Screenshot from 2020-03-25 08-52-52.png

      • 2) Ministry of Electronics and IT, MeitY, MeitY Startup Hub (MSH) (Govt of India), FICCIFLO Pune, APJ Abdul Kalam Centre, Science and Technology Park, Pune (Ministry of Science and Technology, Govt of India initiative), Garage48, Accelerate Estonia, Robotex International
        25th March 2020
        Think of all the problems that arise from the Covid-19 crisis. Which one do you want to help solve? What would be a good solution for that specific problem, and how do you plan to solve it during the hackathon?
        http://www.hackacause.in/

        https://www.meity.gov.in/writereaddata/files/Hack_the_crisis_India_%26_MeitY.pdf
        Screenshot from 2020-03-25 08-54-57.png

      • 3) AngelList
        The Indian arm of AngelList — US-based online platform for startups, angel investors and job seekers looking to work at or with a startup — has committed to invest INR 50 Lakh into the startups that are working on possible solutions for Covid-19 or coronavirus.
        https://landing.angel.co/angellist-india-the-collective
        Screenshot from 2020-03-25 09-02-54.png

      • 4) LifeArc
        6th April 2020
        LifeArc has made available an initial £10M for the identification of therapeutics that can be rapidly deployed to treat COVID-19. The aim is to run trials in patients during the current epidemic. It is anticipated that applications will be for funding to repurpose one or more drugs that are generic, already licensed, or are in late-stage development for another indication.

        Screenshot from 2020-03-25 09-05-20.png

      • 5) Paytm
        Paytm is committing Rs. 5 Crore to help all innovators and companies working on indigenous solutions to tackle the potential shortage of clinical ventilators and other critical medical equipment. Being a company which has always cherished innovations that help in bettering the lives of millions of Indians, we want to extend our help to all innovators who are working tirelessly day and night innovating solutions that can potentially save millions of lives in the weeks ahead.

        A Comprehensive Guide to Money Transfer, Recharges, Bill Payments and Other Digital Payments | Paytm Blog
        Screenshot from 2020-03-25 09-07-35.png

      • 6) Wingify
        Join 1000+ other people from India's tech, business and healthcare community and build projects to help minimize COVID-19's impact on India

        Screenshot from 2020-03-25 09-09-02.png

      • 7) DoIT & e-Gov, Government of Jharkhand
        25th March 2020
        COVIDTHON 2020 is an online hackathon in public interest with special focus on containment of Coronavirus (COVID-19) with intent to develop following 3 interlinked components:

      1. A quarantine management app (QMA) for citizens at risk identified by the administration,
      2. An effort management app/web portal for administration (state, district, sub-district and medical officer levels) and
      3. A general citizen app for risk assessment, reporting of cases and crowdsourcing of data.
        https://hackathon.jharkhand.gov.in
        Screenshot from 2020-03-25 09-10-28.png
      • 😎 Forge
        27 & 28 March 2020
        Forge as the partner incubator for this national-level ideathon has organised the program in partnership with MHRD Innovation cell, AICTE and InnovCurious to support the most impactful ideas to fight COVID-19 challenge by Student Innovators, Educators, Researchers, Professionals & Startups, etc.
        https://www.forgeforward.in/fightcorona/
        Screenshot from 2020-03-25 09-12-12.png

      • 9) Department of Biotechnology
        30th March 2020
        To support the preparedness, readiness and response for COVID-19, project proposals are being solicited for Developing diagnostics, Vaccines, Novel Therapeutics, Repurposing of Drugs or any other intervention for control of COVID-19 by ndustry/Academia/ Industry-Academiaparticipation

        https://dbtindia.gov.in/sites/default/files/COVID-19_%20Research_Consortium.pdf
      • 10) SERB
        30th March 2020
        Thus, there is an urgent need to ramp up national R&D efforts for new antivirals, vaccines, and affordable diagnostics. With this background, SERB announces a special IRHPA Call (3-year duration) specifically designed for COVID-19 and related respiratory viral infections.

        The Electronic Project Proposal Management System, For SERB
        https://www.serbonline.in/SERB/AbstractFilePath?FileType=E&FileName=SERB_IRHPA_COVID_2020.pdf&PathKey=DOCUMENT_TEMPLATE
      • 11) MyGov
        31st March 2020
        Government of India is taking all necessary steps to ensure that we are prepared well to face the challenge and threat posed by the growing pandemic of COVID 19 –the Corona Virus. With the active support of the people of India, we have been able to contain the spread of the virus in our country. The most important factor in preventing the spread of the Virus locally is to empower the citizens with the right information and taking precautions as per the advisories being issued by the Ministry of Health & Family Welfare. Further, we are also getting inputs with regard to individuals and companies who have developed technologies and innovative solutions, Bioinformatics, datasets, Apps for diagnosis etc that can be leveraged for strengthening the fight against Corona.

        Screenshot from 2020-03-25 09-15-23.png

      • 12) Omidyar Network
        Omidyar Network India today announced a call for proposals for rapid response funding to tackle the challenges posed by the Covid-19 situation and the consequent socio-economic impact. We are committing Rs. 7.5 crore ($1 million) to this initiative.

        Screenshot from 2020-03-25 09-17-34.png

      If I missed anything please add here.

      posted in Fight Against COVID19 Outbreak
      Abhay
      Abhay
    • Webinar: How to switch for Software Developer role in Product based companies?

      Mamta Kumari [Co-Founder PrepBytes, Former SDE Amazon, Samsung] will guide you on how to prepare for coding interviews & SWITCH to Product companies as Software Developer.
      Date & Time: 28th March 2020, 09:00PM IST

      Register: https://m.facebook.com/story.php?story_fbid=1076336636080255&id=502511680129423

      photo_2020-03-23_16-22-32.jpg

      posted in Events & Hackathons
      Abhay
      Abhay
    • RE: How to use Raspberry pi4 without display and keyboard with a VNC viewer.

      @kowshik1729
      We couldn't find monitor during a hackathon and it cost the majority of our time to set up pi, this was the alternative that saved us back then.

      Hope it will be helpful for you to @kowshik1729

      posted in Raspberry Pi
      Abhay
      Abhay
    • Online Hackathon for fighting COVID-19

      tweet.png

      An online hackathon is taking shape to fight COVID-19, please join and collaborating for better tomorrow.

      Paras Chopra on Twitter
      posted in Fight Against COVID19 Outbreak
      Abhay
      Abhay
    • GTC: NVIDIA's GPU Technology Conference.

      Seminars & Webinars Start from Today 24th march 2020. (Mostly all are free)
      Anyone who would like to start, this would be an easy and informative session.
      As of now Till April 9th programs are scheduled.
      624 sessions are available currently and rest are being announced.

      0.jpeg

      GTC Digital is the great training, research, insights, and direct access to the brilliant minds of NVIDIA’s GPU Technology Conference, now online.

      Join the live webinars, training, and Connect with the Experts sessions starting Tuesday, March 24. You can also choose from a library of talks, panels, research posters, and demos that you can view on your own schedule, at your own pace. New on-demand content will be announced every Thursday starting March 26.

      Best of all, registration for GTC Digital is free*. Register today and start building your interest list.

      posted in Events & Hackathons
      Abhay
      Abhay
    • RE: IoT Cloud Service.

      @kowshik1729 thank you, for the suggestion. Its informative. 👍🏼

      posted in General Discussion
      Abhay
      Abhay
    • Openhack19

      Hey folks,

      Want to write code that will touch the lives of hundreds of thousands of people? Are you waiting for that opportunity to give back to the society? Look no further! OpenHack- A 2 day immersive Hackathon organized by KeralaRescue team on 26th and 27th of October to unite people to work upon a single project , building a disaster management, awareness and alertness platform that can be used by the government and communities anywhere for spreading awareness,and for efficient coordination of relief and related activities .

      🗺 : Integrated Start Up Complex, Kalamassery

      🗓 : 26 and 27 October, 2019

      Registration is open at https://openhack.tech

      posted in Events & Hackathons
      Abhay
      Abhay
    • Designing circuits with circuito.io

      circuito.io is a website we came accross while we were search for some sensors for our project. https://www.circuito.io
      It is an easy interface for prototypers to design circuits. If you know the right components for your project then designing the circuit is simply a matter of drag and drop.

      Search for your board, components etc darg them to screen, the interface will automatically make the circuit. You can get the circuit diagram, estimated cost of your components and even the code. But I will recommend to understand the code and write the code by yourself for your uscase

      posted in PCB Designing
      Abhay
      Abhay
    • RE: Vehicle data retrieving

      Hi @kowshik1729
      Thank you for the insight. Will definitely post further queries here as we progress on the project. Hope you could suggest answers like these again. Thank you

      posted in Raspberry Pi
      Abhay
      Abhay

    Latest posts made by Abhay

    • RE: Error in network creation of Hyperledger Fabric network usin AWS blockchain templates for Hyperledger Fabric

      @Abhay
      WhatsApp Image 2020-04-23 at 11.46.56 AM.jpeg

      We try to find more about the error so far this is what we got from it.

      So we run user data commands inside instance via SSH. Then error popped up when we run command for network artefacts.

      Any suggestions??

      posted in General Discussion
      Abhay
      Abhay
    • RE: How to use Raspberry pi4 without display and keyboard with a VNC viewer.

      @kowshik1729
      We couldn't find monitor during a hackathon and it cost the majority of our time to set up pi, this was the alternative that saved us back then.

      Hope it will be helpful for you to @kowshik1729

      posted in Raspberry Pi
      Abhay
      Abhay
    • RE: How to use Raspberry pi4 without display and keyboard with a VNC viewer.

      @salmanfaris Thanks for reminding about windows machine partitions and insight about using Ext2Read.

      For Linux users, can skip the process of installing PuTTy SSH Client since SSH client are installed in Linux by default.
      Open terminal and type: **

      • ssh pi@ipaddress //Replace ipaddress with IP address of your pi.
        then enter the username (by default: pi)
        password (by default: raspberry)

      Download and install deb package for VNC viewer.

      posted in Raspberry Pi
      Abhay
      Abhay
    • How to use Raspberry pi4 without display and keyboard with a VNC viewer.

      Raspberry Pi

      Screenshot from 2020-04-22 06-58-09.png

      The Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and in developing countries. The original model became far more popular than anticipated, selling outside its target market for uses such as robotics. Usually, it does not include peripherals (such as keyboards and mouse ) or cases but they can be attached via the USB ports

      Download the os image: https://www.raspberrypi.org/downloads/raspbian

      rpi image download.png

      Then flashing the memory card for booting os (minimum 8 GB recommended, can use balenaEtcher)
      After flashing open boot directory from the memory card

      • Create an empty file and rename it ssh (remove extensions if any)
      • Create another empty file and rename it wpa_supplicant.conf
      • Open wpa_supplicant.conf and copy the below code
        country=US
        ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
        update_config=1
        network={
        ssid="NETWORK-NAME"
        psk="NETWORK-PASSWORD"
        }

      Replace “NETWORK-NAME” with your network name and
      “NETWORK-PASSWORD” with the password of your network

      Find the IP of raspberry-pi (Rpi)
      You can install the Fing app in your smartphone and connect it to the same network as Rpi.
      Then find the IP of Rpi.

      Install PuTTY SSH client

      putty.png

      • Type the IP of Rpi in the Host Name.
      • Then click open. Then a terminal opens asking your username and password. By default, the username will be pi and password raspberry.
      • Type sudo raspi-config.
      • In the window that appears activate VNC by moving the arrow key.

      Now to use VNC viewer
      Download it from:https://www.realvnc.com/en/connect/download/viewer

      • Install VNC viewer
      • Enter the IP of pi in the window that opens.
      • Enter the username and password.

      If the display is not available
      Type sudo raspi-config
      Go to advance settings.
      Adjust resolution by selecting the appropriate one.

      posted in Raspberry Pi
      Abhay
      Abhay
    • Error in network creation of Hyperledger Fabric network usin AWS blockchain templates for Hyperledger Fabric

      We are trying to build a blockchain-based solution for the forensic application of vehicular accidents. The accident data of the vehicle is stored to a blockchain network in hyperledger fabric, so that no one can tamper the data, only authenticated authorities who have access to the hyperledger fabric network ledger can access to it which we make use of the channel concept in the hyperledger framework.

      So the data from the IoT device (currently we build an app to access data such as accelerometer, gyroscope and GPS from smartphones) is been transferred to the Hyperledger Fabric network. We try to create a Fabric network in the AWS blockchain template for Hyperledger Fabric. Then from this hyperledger fabric, all the organizations who are part of this network such as forensic, insurance, manufacturers etc, are the stakeholders who can access the data in the network via the channel (channels helps to bring abstractions ie each stakeholder will only know what is necessary for them).

      So we try to create the blockchain network in AWS using Blockchain template for hyperledger fabric. The template for network creation is actually inside a cloud formation stack, which is a service provided by AWS, so we need to create the stack to create the network. Before creating this stack we need to create a VPC, EC2 instance, IAM roles and policies. So we follow according to the below youtube video to create it.

      Deploying Hyperledger Fabric Blockchain Template On AWS Tutorial

      After completing all the above prerequisite, we need to create the template inside the stack. Inside the stack we need to provide stack with the name of the stakeholders in the network ie, forensic, manufacturers etc.. Name of the VPC, EC2 instance ID, all the prerequisite details we created earlier.

      When clicking the create a stack, it takes some time to create it, after some time it shows the stack is getting failed and getting rollback, there will be two stacks one is a nested stack of the parent stack, which contains all the artefacts for the hyperledger fabric network it is one which gets failed first, then the parent stack which contains the link to the EC2 instance.
      WhatsApp Image 2020-04-21 at 7.11.08 PM.jpeg
      screenshot of the error

      Integration part ie transferring data and accessing ledger can be done only after this stack creation and network spun up.

      posted in General Discussion
      Abhay
      Abhay
    • RE: how did sudo command solved can't open device "/dev/ttyUSB0": Permission denied?

      @arunksoman thanks,
      I will look more into it. Thanks again

      posted in General Discussion
      Abhay
      Abhay
    • RE: how did sudo command solved can't open device "/dev/ttyUSB0": Permission denied?

      @arunksoman by usual steps I meant adding our user to the group.
      ie the step
      sudo usermod -a -G dialout <username>

      posted in General Discussion
      Abhay
      Abhay
    • RE: how did sudo command solved can't open device "/dev/ttyUSB0": Permission denied?

      @arunksoman thanks for the steps
      but the thing is I don't have issues with port now, I was curious how it got resolved without going through the usual steps but by using sudo command.

      posted in General Discussion
      Abhay
      Abhay
    • how did sudo command solved can't open device "/dev/ttyUSB0": Permission denied?

      Please read full

      This is the most common or the most probable error you might have seen if you tried coding Arduino, nodeMCU etc in Arduino-ide.
      It might happen that when you upload a sketch - after you have selected your board and the serial port -, you get an error Error opening serial port ... If you get this error, we google it and the method to debug it is to set serial port permission.

      Screenshot from 2020-03-29 17-27-59.png

      this is the steps we followed to solve it. Even though the error stilled showed sometimes and had to use this code again.

      Since I try different distros of Linux sometimes I end up corrupting the old distro and reinstalling it from the beginning.
      This time I actually didn't follow these step but installed Arduino from the terminal using sudo apt install arduino command and run the code. The interface was completely different. The image below is the general interface of ide but installing it with sudo command give an ide with same screen but no setup{} or loop() part, a blank screen.
      Screenshot from 2020-03-29 17-42-34.png
      An error popped up about the port issue and solution to add the user to the group was mentioned in the terminal and followed the same command. After which the error never showed. I also snap installed arduino.

      Now my question is : By installing arduino using sudo command did I install ide or supporting libraries and why did the error stop?

      posted in General Discussion
      Abhay
      Abhay
    • List of hackathons and price offering for solving different COVID-19 problem space

      The world is going through a tough time, COVID-19 has struck every nation badly. Various Government and Non-Government bodies are calling for the collaborations of makers and the public to put their skills to use during the time of isolation for solving different COVID-19 problem space.
      This post contains 12 such calls:

      • 1) Technology Development Board
        27th March 2020
        The Technology Development Board invites proposal applications from Indian companies and enterprises to address protection and home-based respiratory intervention for COVID-19 patients.

        http://tdb.gov.in/wp-content/uploads/2020/03/Doc1-1.pdf
        Screenshot from 2020-03-25 08-52-47.png
        Screenshot from 2020-03-25 08-52-52.png

      • 2) Ministry of Electronics and IT, MeitY, MeitY Startup Hub (MSH) (Govt of India), FICCIFLO Pune, APJ Abdul Kalam Centre, Science and Technology Park, Pune (Ministry of Science and Technology, Govt of India initiative), Garage48, Accelerate Estonia, Robotex International
        25th March 2020
        Think of all the problems that arise from the Covid-19 crisis. Which one do you want to help solve? What would be a good solution for that specific problem, and how do you plan to solve it during the hackathon?
        http://www.hackacause.in/

        https://www.meity.gov.in/writereaddata/files/Hack_the_crisis_India_%26_MeitY.pdf
        Screenshot from 2020-03-25 08-54-57.png

      • 3) AngelList
        The Indian arm of AngelList — US-based online platform for startups, angel investors and job seekers looking to work at or with a startup — has committed to invest INR 50 Lakh into the startups that are working on possible solutions for Covid-19 or coronavirus.
        https://landing.angel.co/angellist-india-the-collective
        Screenshot from 2020-03-25 09-02-54.png

      • 4) LifeArc
        6th April 2020
        LifeArc has made available an initial £10M for the identification of therapeutics that can be rapidly deployed to treat COVID-19. The aim is to run trials in patients during the current epidemic. It is anticipated that applications will be for funding to repurpose one or more drugs that are generic, already licensed, or are in late-stage development for another indication.

        Screenshot from 2020-03-25 09-05-20.png

      • 5) Paytm
        Paytm is committing Rs. 5 Crore to help all innovators and companies working on indigenous solutions to tackle the potential shortage of clinical ventilators and other critical medical equipment. Being a company which has always cherished innovations that help in bettering the lives of millions of Indians, we want to extend our help to all innovators who are working tirelessly day and night innovating solutions that can potentially save millions of lives in the weeks ahead.

        A Comprehensive Guide to Money Transfer, Recharges, Bill Payments and Other Digital Payments | Paytm Blog
        Screenshot from 2020-03-25 09-07-35.png

      • 6) Wingify
        Join 1000+ other people from India's tech, business and healthcare community and build projects to help minimize COVID-19's impact on India

        Screenshot from 2020-03-25 09-09-02.png

      • 7) DoIT & e-Gov, Government of Jharkhand
        25th March 2020
        COVIDTHON 2020 is an online hackathon in public interest with special focus on containment of Coronavirus (COVID-19) with intent to develop following 3 interlinked components:

      1. A quarantine management app (QMA) for citizens at risk identified by the administration,
      2. An effort management app/web portal for administration (state, district, sub-district and medical officer levels) and
      3. A general citizen app for risk assessment, reporting of cases and crowdsourcing of data.
        https://hackathon.jharkhand.gov.in
        Screenshot from 2020-03-25 09-10-28.png
      • 😎 Forge
        27 & 28 March 2020
        Forge as the partner incubator for this national-level ideathon has organised the program in partnership with MHRD Innovation cell, AICTE and InnovCurious to support the most impactful ideas to fight COVID-19 challenge by Student Innovators, Educators, Researchers, Professionals & Startups, etc.
        https://www.forgeforward.in/fightcorona/
        Screenshot from 2020-03-25 09-12-12.png

      • 9) Department of Biotechnology
        30th March 2020
        To support the preparedness, readiness and response for COVID-19, project proposals are being solicited for Developing diagnostics, Vaccines, Novel Therapeutics, Repurposing of Drugs or any other intervention for control of COVID-19 by ndustry/Academia/ Industry-Academiaparticipation

        https://dbtindia.gov.in/sites/default/files/COVID-19_%20Research_Consortium.pdf
      • 10) SERB
        30th March 2020
        Thus, there is an urgent need to ramp up national R&D efforts for new antivirals, vaccines, and affordable diagnostics. With this background, SERB announces a special IRHPA Call (3-year duration) specifically designed for COVID-19 and related respiratory viral infections.

        The Electronic Project Proposal Management System, For SERB
        https://www.serbonline.in/SERB/AbstractFilePath?FileType=E&FileName=SERB_IRHPA_COVID_2020.pdf&PathKey=DOCUMENT_TEMPLATE
      • 11) MyGov
        31st March 2020
        Government of India is taking all necessary steps to ensure that we are prepared well to face the challenge and threat posed by the growing pandemic of COVID 19 –the Corona Virus. With the active support of the people of India, we have been able to contain the spread of the virus in our country. The most important factor in preventing the spread of the Virus locally is to empower the citizens with the right information and taking precautions as per the advisories being issued by the Ministry of Health & Family Welfare. Further, we are also getting inputs with regard to individuals and companies who have developed technologies and innovative solutions, Bioinformatics, datasets, Apps for diagnosis etc that can be leveraged for strengthening the fight against Corona.

        Screenshot from 2020-03-25 09-15-23.png

      • 12) Omidyar Network
        Omidyar Network India today announced a call for proposals for rapid response funding to tackle the challenges posed by the Covid-19 situation and the consequent socio-economic impact. We are committing Rs. 7.5 crore ($1 million) to this initiative.

        Screenshot from 2020-03-25 09-17-34.png

      If I missed anything please add here.

      posted in Fight Against COVID19 Outbreak
      Abhay
      Abhay