IOT
Whilst the Raspberry Pi 2 has extensibility through GPIO, I2C, SPI and Single wire, the main interface for adding off-the-shelf peripherals is via USB. Unlike the desktop, there is though only a limited set of USB peripherals that can be used on the RPI2 running Windows 10 IoT in the first release. This series of articles looks at what is available and what the overarching issues are. The first Article is “Connected Devices”
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A truly Universal App will run on all Windows 10 targets, with only a targeted CPU change and rebuild required. This second part of this blog series sets up a UAP/UWP project to make use of the file base SQLite database engine. This part creates the project, gathers the required bits and sets up the user interface. Parts three covers the functional code.
With no version of SQL Server and SQL Compact available for Windows 10 IoT and Windows 10 Phone, the suggested alternative is SQLite. Whilst early evaluations indicate it isn’t available for Win10 IoT Background and Console apps, it’s not too hard to use SQLite with a Windows 10 UWP (Universal) app. The app can be rebuilt without modification and using the exact same project content for the desktop, phone and IoT Windows 10 targets.
A Windows 10 UWP app can be built upon the Remote-Wiring library such that the app can interact with an Arduino device running Firmata. An app, similar to the Windows Remote Arduino “Blinky” example, but with feature additions, is developed. It performs GPIO (output AND input) as well as some analog IO. . This app is functionally the same as Windows 8.1 version in the previous blog in this series. This blog works through the same material (ie repeats much of it) as the previous blog but from the Universal Windows Platform (UWP) context rather Windows 8.1 Universal App context. The target for the app is Win 10 desktop, Win 10 phone and Raspberry PI2 (running Win 10 IoT). The latter target is a "work-in-progress though".This blog can be read without reference to the previous blog.
This blog is a Tutorial on how to implement Win 10 IoT Universal Apps that make use of Raspberry PI 2 (RPI2) General Purpose Input Output (GPIO) pins. This covers:
The interrupt (event driven) version addresses the InvokeRequired pattern in the XAML context. (Controls can't be updated directly from another thread).
The complete solutions are available (in source) on Codeplex at: "Windows 10 IoT Samples": https://IoTSampler.Codeplex.com
I was an early adopter of Win 10 IoT with Raspberry PI 2 (RPI2) as well as Windows Remote Arduino. Whilst I was able to use my Windows 8.1 phone to control an Arduino device as per the latter technology, I did have some problems with some fine detail with the RPI2 technology. I have now had a second stab at Win 10 IoT with RPI2 with success. This blog discusses these issues.
Windows 10 IoT is the third (lower) layer of Windows 10. All three are built from the same codebase, part of Microsoft’s one Windows mantra. Whilst the desktop will have significantly more features than the IOT layer, the IoT layer will embedded features such as General Purpose IO (GPIO) which the desktop doesn’t. The Phone layer will support cellular networks for phone calls whereas the other two only support this for internet access. Apart from the common code, a binding feature of all three is Universal Apps.
At Build 2015 in San Francisco this week, there has been a large range of announcements wrt Windows 10. The topic of interest here is "Windows 10 IoT Core Insider Preview" as a public release of this for this for the Raspberry Pi 2 was much anticipated. That is now available. The IoT sessions indicate that it is now available not only for that but for a number other contexts
A detailed description of the CEJSON JSON Parser.
Version 1 AzMS Tables use an auto-incremented integer field as the primary key which is more compact than the GUID string used in version 2 AzMS tables.. The Azure Portal generates Version 2 tables which can be inefficient for resource limited embedded devices. This blog covers how to generate version 1 AzMS tables.