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From the monthly archives: February 2015

We are pleased to present below all posts archived in 'February 2015'. If you still can't find what you are looking for, try using the search box.

David Jones's avatar

Ardjson-Part 4b: Arduino Networking


Some hints to do with networking an Arduino device.

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David Jones's avatar

Ardjson-Part 3b: cURL CRUD Examples


Examples of cURL command lines for various table operations with Microsoft Azure Mobile Services.

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David Jones's avatar

Ardjson–Part 3: Command line Json: cURL.exe


An Azure Mobile Service table can be simply manipulated via a command line app called cURL.exe

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dvescovi's avatar

Power management on Beaglebone part 3-Battery cont.


  This is a follow on to my previous two posts Power managment on Beaglebone AM335x platform part 1 and Power management on Beaglebone part 2-Battery for the community IoT BSP at BeagleBone BSP. The first two parts I discussed the background of battery support and some of the hardware modifications that are needed for the BeagleBone Black platform. I also talked about the AM335x’s on chip analog to digital converter (A/D or ADC) and how it can be used to measure voltage signals like battery voltage. We developed an A/D converter driver and test program and integrated it into the BSP. The next step in the process is to pull it altogether by developing a battery driver. The battery driver will, of course, be dependent on the A/D driver so we must make sure the A/C driver is loaded first. We can do this by modifying the drivers “Order” setting. For example here are the ADC registry setting: IF BSP_AM33X_ADC [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\ADC1]     "Prefix"="AD ...

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Paolo Patierno's avatar

Regex portability between .Net and .Net Micro Framework … pay attention !!


Developing on all versions of the .Net Framework (full, compact and micro) I have always the portability problem and I avoid to use methods that are not available in one of three framework or using directives for precompilation.

 

It never happened a case where the method exists in all the frameworks but the parameters have a different meaning ... are even reversed !!

 

The method in question is the overload Regex.Split(String, String, RegexOptions) !

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David Jones's avatar

Ardjson – Part 2: Morphing The ToDo Sample Mobile Services Project into the Telemetry Project


How to modify the Mobile Services sample ToDo List application into something useful.

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David Jones's avatar

Ardjson – Part 1: A New IOT Project on Codeplex


A new Codeplex project as follow up to my recent IOT presentation focusing upon Embedded Devices interacting with an Azure Mobile Service.

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David Jones's avatar

Compact 7 Wave 2 Released


A new release of Windows Embedded Compact 7 is available on MSDN which is a rollup of all previous updates packaged as a new installation.

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Paolo Patierno's avatar

Non standard Base64 encoding in the .Net Micro Framework


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.

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dvescovi's avatar

Yet Another Gotcha: Compact 7 Update


It has been well documented in the news group the Windows Embedded Developer Update (WEDU) tool is pretty much broken in Windows Embedded Compact 7.  Many times it will show this message stating there are no updates needed when in fact there are newer updates available.     You can still relaunch the installer from the Windows Control Panel installed programs or use the WindowsEmbeddedCompact7.exe install launcher to kick off a re-install/update. This seems to work and initially it will find what level install you have existing and what is available as indicated with the slider at the top of the screen, It will then ask you to accept some eula’s:   It will try to download the component and update packages from the internet. You also have the option to create an offline layout. All fine and good so far but then comes the gotcha. It will stall asking for a SharedSource component.   You can try clicking the “Allow downloading for all files.” but it will not work and it ...

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