Once again Arduino enthusiast Rui Santos has documented and demonstrated an interesting project for us to learn from. In this example Rui shows how to send a message from an Android device to one of our Dot Matrix Display boards via Bluetooth. The sequence of the project is quite simple, he created an Android app using the free MIT App Inventor which accepts the text to display, and sends this via Bluetooth to a matching receiver connected to the Arduino's serial line. Once received by the Arduino, the text is sent to the DMD and scrolled continuously until a new message is received - as demonstrated in the following video:
And as the DMD units can be cascaded for even longer physical displays, you can create impressive and bright text displays that can be easily controlled with your phone instead of re-coding and uploading sketches. For complete details, visit Rui's interesting website. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
As used in the review mentioned above, check out our Freetronics Dot Matrix Displays. They're simple to use, yet very bright for indoor and outdoor situations. Available in various colours, the 32 x 16 LED matrix can display text and graphics quite easily - and can be daisy-chained together for extended displays. For more information, see our range of Dot Matrix Displays here.