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This is an Arduino Shield for the RN-42 Bluetooth module from Roving Networks with built in regulator and level shifters! The module is directly compatible with any Arduino board that supports the shield layout. The module from Roving Networks is small, powerful, and very easy to use and designed to replace serial cables. The Bluetooth stack is completely encapsulated so the end user sees only serial characters being transmitted back and forth. Press the 'A' character from a terminal program on your computer and an 'A' will be pushed out the TX pin of the Bluetooth module.
The RN-42 is a compatible substitution for the RN-41. The primary difference between the two is that the RN-42 is a Class 2 module, meaning its range is about 60 feet and, accordingly, the power consumption is reduced.
The RN-42 is perfect for short range, battery powered applications. It uses only 26uA in sleep mode while still being discoverable and connectable. Multiple user configurable power modes allow the user to dial in the lowest power profile for a given application.
Supporting multiple Bluetooth profiles such as SPP and simple UART hardware interface, it is simple to integrate into an embedded system or simply connect to an existing device. The RN-42 is FCC and Bluetooth SIG certified making it a complete embedded Bluetooth solution.