The SPI2UART or MULTIUART open source project is designed to provide additional serial ports for communications with multiple embedded modules such as mobile phone network (GSM), Bluetooth, Wifi etc.
A full build guide is now available via instructables at the link below.
http://www.instructables.com/id/SPI-to-4-x-UART-Bridge-MULTIUART/
A number of boards are currently available on sale via eBay.
An Arduino library and Flowcode component are now available to help driver the board.
At exhibitions you often want to show off your work in the hopes of attracting new potential customers. This also works for the windows of stores to advertise products on sale within. Most will simply create a large fixed image poster at great expense and use this for long periods of time. Sometimes much longer than the product in question is on promotion.
Using modern technology it is possible to create a dynamic animated display for approximately the same cost as the fixed image poster.
Continue reading Easy Raspberry Pi Based Screensaver/Slideshow for Exhibitions/Store Front