A assessment of Adafruits cheap RF keyfob distant and receiver. That is by far the simplest and least costly RF options I’ve seen! It is a “turnkey” answer – e.g. it really works proper out of the field. It may instantly management issues (like an LED or transisotr) or be used to set off a digital enter pin on an Arduino or Raspberry Pi!

Try one other Arduino Wi-fi Possibility: http://amzn.to/1wMwzUe

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