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WiFi globalCALCnet with the Spark Core
Published by KermMartian on October 5, 2014 at 12:00:08 PM CST | Discuss this article (67)

Two weeks ago, the folks from Spark gave us two Spark Core WiFi development boards. These unique boards are based around TI's CC3000 chip, and also include an STM32F103 microcontroller for running user code. One of the key selling points of the Spark Core is that it includes a library providing compatibility with the Arduino Wiring "language". It was the work of two weeks to port my Arduino globalCALCnet bridge (first announced here in 2011) to the Spark Core, then integrate the functionality of the gCn Bridge code.

Previously, connecting a local-area CALCnet2.2 network to the wide-area globalCALCnet network required an internet-connected computer. A piece of software running on the computer, called the gCn Bridge, was responsible for encapsulating incoming packets ("frames") from calculators in TCP/IP packets and sending them across the internet, and unpacking incoming packets to deliver back to calculators. A previous Cemetech project attempted to use the ENC28J60 Ethernet module to directly connect CALCnet2.2 to globalCALCnet, but that project was put indefinitely on hold in 2013. This current project achieves all the goals of that project, and more: it provides a computer-free way to connect calculators to the internet, and lets the calculators independently configure the bridge device as well. The two components that were necessary to make this work are the Spark Core firmware itself, modified and expanded from the original Arduino gCn bridge firmware, and a Bridge Configurator program written in TI-BASIC that is used to set the WiFi credentials and local and remote gCn hub names on the Spark Core.

You can view a video of the device in action below, as well as download the Spark Core firmware and the gCn Bridge Configurator program at the links provided. I look forward to seeing more exciting developments based on this project.

Downloads and Information
WiFi Bridge firmware for Spark Core
Bridge Configurator program
Video of WiFi gCn in action



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2014 Articles
January 2014 January 2014 [Back to News Archives Index]

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February 2014 February 2014 [Back to News Archives Index]

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March 2014 March 2014 [Back to News Archives Index]

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April 2014 April 2014 [Back to News Archives Index]

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May 2014 May 2014 [Back to News Archives Index]

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June 2014 June 2014 [Back to News Archives Index]

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July 2014 July 2014 [Back to News Archives Index]

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August 2014 August 2014 [Back to News Archives Index]

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September 2014 September 2014 [Back to News Archives Index]

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October 2014 October 2014 [Back to News Archives Index]

» WiFi globalCALCnet with the Spark Core published October 5, 2014 by KermMartian
» New HP Prime Revision C and Wireless Module published October 7, 2014 by tifreak8x
» STEM Behind Hollywood: Earth Impact! for TI-84 Plus C SE published October 10, 2014 by KermMartian
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November 2014 November 2014 [Back to News Archives Index]

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