OSEPP™ Bluetooth


The OSEPP™ Bluetooth board introduces Bluetooth connectivity to its users with the Bluegiga WT11, class 1, Bluetooth 2.1 + EDR module. With more than 10 supported Bluetooth profiles, this board can be used for a multitude of BT-related projects.



Microcontroller ATmega328P
Clock Speed 16 MHz
Flash Memory 32 KB
Operating Voltage 5V
Input Voltage 1.2-5.5 V
Digital I/O Pin Count 14 (including 6 for PWM output)
Analog Input Pin Count 6
Other Connections Bluetooth 2.1 + EDR (select BT profiles)ICSP for ATmega328PDC power screw terminal
Dimensions 3.23 x 2.13 x 0.57 inches (82.0 x 54.0 x 14.5 mm)
Power Source External DC power supply



•    8-bit AVR RISC-based microcontroller running at 16 MHz
•    Bluegiga WT11 class 1 Bluetooth 2.1 + EDR module
•    Input voltage can be as low as 1.2V
•    Connects to a computer via Bluetooth serial COM
•    ICSP header for programming microcontroller
•    Compatible with existing Arduino software libraries
•    Compatible with the Ethernet and Motor Controller Shields



The high-efficiency, low-supply current, step-up DC/DC converter allows an input voltage of as little as 1.2V to be used and as high as 5.5V.


The ATmega328P comes with the Arduino bootloader preloaded. There is an ICSP (In-Circuit Serial Programming) header for the ATmega328 to optionally replace the bootloader.


The Bluegiga WT11, class 1, Bluetooth 2.1 + EDR module contains an integrated Bluetooth radio antenna and iWRAP protocol stack. The Bluetooth stack offers a slew of profiles such as Serial Port Profile (SPP), Dial-up Networking Profile (DUN), Hands-Free Profile (HFP), Headset Profile (HSP), Human Interface Device (HID), A/V Remote Control Profile (AVCRCP), Device Identification Profile (DI), Phone Book Access Profile (PBAP), Object Push Profile (OPP), File Transfer Profile (FTP), and Bluetooth Health Device Profile (HDP). Furthermore, the WT11 firmware is upgradeable via serial pins that are exposed on the board. For more details, visit:


The input and/or output pins are brought out to pre-mounted headers, which enable a convenient way to prototype projects without the need of soldering or desoldering.



Stock Code Product Name
BTH-01 OSEPP Bluetooth



This board is based off of the Arduino BT (Bluetooth) designed by Arduino, and is released
under the Creative Commons Attribution Share-Alike License.
The original design can be found at



OSEPP Bluetooth Schematic (PDF)
OSEPP Bluetooth EAGLE Files OSEPP zip files