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Last month I developed a lot and I had the pleasure of being speaker to three national events and an international one in California (but from remote).I was greatly involved to write code and content that I decided to summarize hoping that you could enjoy them.
With the slides I tried to describe the most important features of the Azure Service Bus focusing on the Event Hubs and its use within the telemetry pattern in IoT :Event Hubs : million events per second to the Cloud (MEC Internet of Things Conference 2015 in Naples)Event Hubs : million events per second to the Cloud (Global Azure Bootcamp, OC community California) of which it is also available the video here on YouTubeMicrosoft e l’IoT (M2M Forum in Milan, session with Roberto Andreoli and Erica Barone from Microsoft Italia)Azure Service Bus : under the hood (IoT Day in Venice)These slides have related demos where I used my last Azure SB Lite library, thanks to which you can access to the Microsoft Azure Service Bus using the same API of the "o ...
Developing a new library for accessing to the Microsoft Azure Service Bus (event hubs, queues, topics / subscriptions) based on AMQP (and AMQP .Net Lite library) I came across a bug in the code of the regular expression in the .Net Micro Framework.
The bug occurred by chance, when I had a "connection string" in which there was the "SharedAccessSignature" field that has a value when we use the AMQP connection with CBS (Claim Based Security); for example when we publish to a "publisher" endpoint in the event hubs with a SAS-based security token.
Now … I can write something !!
About two weeks ago I received a great present from Secret Labs (thanks to Chris Walker) … the new Netduino 3 Wi-Fi board !
There is a new .Net Micro Framework board in town !
In the past few months, MikroElektronika release the Quail Board as a solution for building hardware prototypes using all the best features of .Net Micro Framework and the related “click” boards for a lot of type of external devices, like sensors (humidity, temperature, …), wifi module, OLED and so on.
The first "visible" step of the new .Net Micro Framework has been accomplished ... finally the official repository for the future versions is GitHub; viceversa all previous versions of the framework will remain onCodePlex as the forum. Each bug/issue reported on CodePlex will be evaluated and included as "work item" on GitHub.
Due to the "interpreter" nature of the runtime, the project was named ".Net Micro Framework Interpreter" but contains the interpreter, the BCL (Base Class Library) and the native code for porting.
As we know, to be able to access to some Microsoft Azure services, there is the SAS (Shared Access Signature) Authentication by sending a token by which we get the rights to perform specific operations.
This token is obtained by building a string containing some information including the URI to access and the expiration time over which to calculate an HMAC (Hash Massage Authentication Code) withSHA256. The result of this hashing operation is encoded in Base64 and the result obtained is inserted in the token (Shared Access Signature) with an appropriate format.
The goal of this short post isn’t to describe the procedure for determining the token but to warn the user about the Base64 conversion functions provided by the .Net Micro Framework.
One of the biggest initiatives of 2014 was definitely the birth of DotNetPodcast, podcast completely in Italian and dedicated to Microsoft technologies. Guests are always of the highest level and earlier this year, I had the honor of being able to record an episode, completely dedicated to the Internet of Things and the development of IoT solutions using the .Net Micro Framework.
News, news … news !
The waiting is over ! The first news of the new life of .Net Micro Framework have been announced publicly yesterday with the new SDK R2 Beta release for the 4.3 version.
This time, with great honor, I will be among the speakers of the Community Days 2014 to be held September 23 to 25 in Rome, after I was there more times as attendee in the past.
The honor will be double, because I will have the session with my dear friend Valter Minute that I recognized as the "Maradona" of embedded systems.
Our session entitled "Internet of Things: my washing machine connected to the Internet?" will be completely dedicated to IoT starting from embedded systems (Microsoft based) to the possible solutions in the Cloud, including the future project "Reykjavik" based on Azure and presented at Build 2014; the title tells the truth, among other things, we will have as its protagonist a washing machine (toy) !
You can find all the information concerning the agenda of the sessions and logistics on the official website in addition to the registration form.
We look forward to this event every year will not disappoint the expectations of those who participate !
It seems that I was on vacation (given the lack of posts on my blog) and it's the truth !
Despite the holiday, I continued the development of the M2Mqtt project and today I am pleased to release the new version 18.104.22.168 with WinRT support !!
I made some changes on networking layer (from Socket to StreamSocket), thread (from Thread to Task) and security but finally the first MQTT client for all .Net platforms today also works on tablets with Windows 8.1 and on smartphones with Windows Phone 8.1.
The new project, added in a Visual Studio 2013 solution, is a "portable class library" that I used and tested in a Universal App.
The same for the "brother" GnatMQ, now in version (Beta) 0.9.2.0, thanks to which we have an MQTT broker to run on tablet and smartphone with Windows 8.1 OS family.
Of course I updated the Nuget package by adding the assemblies for WinRT.
I hope I did something useful f ...
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