We know what you're thinking, "What's the big deal? Looks like an SD
card..." Well this is no SD card! The Electric Imp is a WiFi enabled
development platform powered by a Cortex-M3 processor core.
In essence, the Imp provides an easy, integrated way to connect almost
any hardware device both to other devices and to internet services.
It's more than just a WiFi card, or even a WiFi module with processing
built in - it's an integrated platform that deals with the drudgery of
connectivity, allowing you to concentrate on the application instead
of the mechanics.
It does this by integrating an 802.11b/g/n WiFi transceiver, a great
antenna, a Cortex-M3 core and lots of flexible I/O in a tiny package.
But the hardware is only part of what makes the Electric Imp an
innovative platform. The development environment and workflow is
totally cloud-based and in-browser! Simply program the Imp with your
WiFi Network information using your iOS or Android smartphone
(Optically! No special hardware required!) then log on to the Electric
Imp developer website and program your module over-the-air!
Development is done in-browser and in a language called "Squirrel
," which is a C-like language with extensions to communicate with
the hardware interfaces and the service. Thanks to cloud-power, you
get many big system benefits like buffered I/O and crash recovery -
plus you can push updates to devices in the field with a few clicks.
There's even a Planner tool that makes it easy to design interactivity
between your Imps.
Note: Although, the Electric Imp comes in an SD form factor, it isn't
compatible with standard SD devices. Development boards are available,
though, in the related items below!
Dimensions: 32 x 24 x 2.1mm
* Super Small Form Factor
* WEP, WPA and WPA2 encryption
* Cortex-M3 core gives great performance combined with low power
* 6 I/O - UARTs, I2C, SPI, analog in and out, PWMs, GPIOs... all
selectable under software control
* No SDK to install, no JTAG pods, no long download times... you
develop your code in a browser-based IDE
* Software that runs on the Imp is written in Squirrel , a C-like
* Data passes to and from the service over a TLS encrypted interface
* Electric Imp Site 
* Electric Imp Wiki 
* Squirrel Language Site 
* Tutorial: Serial Communication w/ Arduino