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This is a breakout board for the RN-41 Bluetooth module from Roving Networks with built in regulator and level shifters! The module is directly compatible with the Arduino Pros, Arduino Pro Mini's, and LilyPad Arduinos. The module from Roving Networks is small, powerful, and very easy to use; it is designed to replace serial cables. The Bluetooth stack is completely encapsulated so the end user just sees 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-41 is pin a compatible substitution for the RN-42. The primary difference between the RN-42 and RN-41 is that the RN-42 is a Class 2 device meaning its range is about 50 to 60 feet and correspondingly the power consumption is reduced. The RN-41 on the other hand is perfect for long range, battery powered applications (up to 100 meters!)
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-41 is FCC and Bluetooth SIG certified making it a complete embedded Bluetooth solution.