Here is an interesting high-level graphical view of what IoT consists of.
IoT Simplified
15 Wednesday Apr 2015
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in15 Wednesday Apr 2015
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in14 Tuesday Apr 2015
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inRecently I was going through the various Smart Thing products that can help build a smart home.
Below table is the output.
( Disclaimer: This is a point in time view, as of April 2015 and I do not intend to keep it up to date by editing every now and then )