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Internet of Things

10 Posts authored by: Jan Cumps Top Member
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Let's dive further into the example Android App "coinfinity". This is the 2nd real thing: Submit a Smart Contract transaction   What is a Smart Contract?  A smart contact is a chunk of executable code. It can be executed "in the block chain". It's called a contract because it ...
Digital Logic have a very nice set of Smart Card readers. I have purchased one of those. They work well with the Infineon Securyty 2Go smart cards I received for the Infineon Blockchain Starter Kit road test. Its a well buit reader from a interesting company. But there's a but .   The readers don't support PC/SC, and to program them, you depend on libraries and executables that are available in binary format. Many, but not all, utilities come with source code. They have dependencies on ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     You talk to the Security 2Go cards with an API called Smart Card Application Protocol Data Unit (APDU). According to Wikipedia "an application protocol data unit (APDU) is the communication unit between a smart card reader and a smart card"   The Security 2Go Starter Kit User Manua ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Let's dive further into the example Android App "coinfinity". This is the real thing: a transaction. Send crypto currency to another account.   Process in Simple Steps  This is the biggest step in the series. Authorising the movement of currency with an Infineon smart card. It ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Let's dive further into the example Android App "coinfinity". Retrieve crypto coin balance information from the Ethereum test network.   Prerequisite: an Infinion Security 2Go smart card loaded with some Ethereum Ropsten test coins. See this post for instructions.   I'm pickin ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Before I can fully use the Security 2Go cards in the coinfinity app, I need to have cash on at least one card. This blog shows the sequence to get fake value on the card.     I used the steps of the Infineon video.   Switch to a Test Blockchain  Switch coinfinity to ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Let's dive further into the example Android App "coinfinity". Look how it iteracts with the Infineon Security 2Go cards.     NFC on Android  Android has decent documentation: NFC Basics. Rough summary: if your application has flagged that it uses the NFC subsystem, and yo ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Let's dive into the example Android App "coinfinity". Look at the sources. And set up a debug session with a pysical Android smartphone.   I'm documenting the steps I used to run the demo application, with support for breakpoints, watching variables and stepping-through-source-code. ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     In the previous post, I set up a Hyperledger Fabric chain. In this post, it's going to be a small footprint Burrow chain. It's from the same organisation, but runs on small devices. Several chains can run comfortably on a Raspberry Pi. I'm documenting the steps I used to get 3 chains runnin ...
This post is part of the Infineon Blockchain Starter Kit road test. Blockchain - outside of the bitcoin context - is new to me. Follow along with me on this path to learn the technology....     Blockchain can be used to build a trail of trusted actions. A chain of events built on trust or agreements between parties. A chain that can be stored at several locations. That can be audited by all involved parties. And that can be audited and queried by external players if they are part ...

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