Hamish MacEwan

We will probably never know in what sense he meant it, for poets do not write to be understood. - Richard Feynman.

Shrunk down an Arduino to the size of a finger-tip!

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The RFduino runs Arduino code and can do everything an Arduino can, plus much more.

Using the RFduino USB shield, simply plug the RFduino into a USB port of any computer and use the Arduino IDE to load your Arduino sketch, which automatically begins running on the RFduino.

Then you can detach the RFduino USB shield and plug the RFduino directly into your project.

The RFduino has Bluetooth 4.0 Low Energy built-in, which enables it to wirelessly talk to any smartphone that has Bluetooth 4.0.