Hi, thank you for the great article. Doing refresh in this way, does the refresh cap (e.g 8 for Pro, 48 for Premium) still applies?

Because of COVID-19 pandemic the annual Things Conference, this year had gone virtual (i.e live streaming), which generally happens in Amsterdam, Netherlands. So I took the opportunity to attend this virtual conference this year from Brisbane, Australia. The conference started on April 16, 2020, at 5:30 pm Brisbane time. Because of the timing, I could not attend some live sessions but later I found them posted in the Things Network Youtube channel.

A few of the items caught my attention. In this article, I will elaborate on my four takeaways from this year’s Things Virtual conference.

1. The device-level decoder on top of application-level decoder

Graph data modeling is the process of defining data as a connected graph where data is represented as nodes and edges. In the case of a graph database, the data gets stored as a graph (ie as nodes and edges) and then queried as graph pattern. Neo4j is a Graph Database which organizes data as graph structure and is designed to answer questions in the form of Cypher query language which is a SQL like a graph query language.

IoT is all about Things and data. The data is not only the data it is sending to the cloud but…

In this article, I am targeting to achieve the following four (4) goals through 24 steps. They are:

  1. Convert a basic Bootstrap website template into a Gatsby powered website
  2. Develop custom component if necessary
  3. Deploy Gatsby website to Netlify CMS
  4. Conducting Google Page Speed review

So what is Gatsby? To understand we need to little bit understand the modern web development stack.

Initially when the internet first came all the websites were static and composed of static HTML, CSS files with images and links. Then came the trend of dynamic websites (ie client/server) where the script (ie PHP, ASP and…

Hyperledger Fabric is a permissioned blockchain network that gets set by the organizations that intend to set up a consortium. The organizations that take part in building the Hyperledger Fabric network are called the “members”.

Each member organization in the blockchain network is responsible to set up their peers for participating in the network. All of these peers need are configured with appropriate cryptographic materials like Certificate Authority and other information.

Peers in the member organization receives transaction invocation requests from the clients inside the organization. A client can be any specific application/portal serving specific organization/business activities. The client application…

MultiConnect mDot Box

MultiConnect MTDOT box is a is a portable handheld LoraWAN end-point. This device can be used to mimic LoraWAN enabled IoT devices for prototyping proof-of-concept IoT applications. Also this device is very useful for conducing LoraWAN site survey and gathering link related data (ie signal strength and so on).

The Things Network is enabling LoraWAN devices to connect to an open source and decentralized network through their local LoraWAN gateways. IoT devices (ie. Temperature, air quality, water level sensors and so on) connected to LoraWAN gateways can exchange data through application created in The Things Network.

In this short article I will discuss on the Hyperledger Fabric APIs for managing the Business Network Cards.

So what are Business Network Cards?

A user interacts with the Hyperledger Fabric Runtime using the Hyperledger Composer tools. Composer tool needs the Business Network Card to conduct the CRUD (Create, Retrieve, Update and Delete) operations. Business Network Cards encapsulates details about the credentials, keys and certificates and the connection profile.

In this article I will mainly cover the following four classes available under the Hyperledger API common module to access the cards that are already available in the system:

  • IdCard
  • BusinessNetworkCardStore
  • FileSystemCardStore
  • MemoryCardStore


IdCard class is available…

Hyperledger is an umbrella project of open source Blockchain and related tools started in December 2015 by Linux Foundation. Hyperledger does not refer to any specific technology or tool rather it refers to a project where multiple teams are collaborating to develop open source and distributed ledger technology (DLT).

All of the Hyperledger initiatives fall under one of the following two categories:

  • DLT Frameworks
  • Tools

There are four active DLT Framework initiatives that are led by different organizations:

  • Hyperledger Sawtooth is led by Intel
  • Hyperledger Iroha is led by Soramitsu
  • Hyperledger Fabric: IBM open sourced its code for Open Blockchain…

The term Blockchain became popular with the rise and popularity of Bitcoin and other cryptocurrencies. People madly invested in it with the intention of quicker return of investment. Bitcoin and other cryptocurrencies are but one application use case of the blockchain.

Blockchain is a new technology with some unique property that can solve many real world problems. Of course it is not solution of all problems but it has its unique use cases.

So understanding what blockchain is and how it works will be very much helpful in deciding where you can use this technology. …

Muntasir Mamun

Blockchain, Hyperledger, IoT, Smart City, Chatbots, Deep Learning and AI

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