The PmodBT is a mature product no longer being produced, and we're currently selling out the remaining stock. Its replacement is the PmodBT2.
The PmodBT™ is a Digilent peripheral module that provides a fully integrated Bluetooth interface, giving your next project the power of wireless communication. The PmodBT’s simple UART interface and profile support allow the end user to make use of the module’s robust functionality with a minimum of extra code. This makes it the perfect solution for embedded wireless communication between a PC, PDA or smart phone and any number of remote applications.
There are two UART signal pin assignment conventions in use on Digilent products. This product uses the new signal assignment convention. Connecting a product using the new convention with one using the old convention requires the use of a UART Crossover Cable (not included).
for a more detailed explanation.