Bluetooth may be cheap(er), but it doesn’t beat ‘free’ as every arduino sold comes with FTDI or some other serialusb bridge… I really want to use app inventor, as I do not have the time to ...

MIT App Inventor, which lets you develop applications for Android devices using a web browser and either a connected phone or emulator. You can also use the Site to store your work and keep track ...

Bluetooth 4.0's Bluetooth Low Energy (BLE) feature allows the microcontroller to run on power sources as small as a button-cell battery for some applications—and the team has developed a "shield ...