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PmodBT2™ Reference Manual
Revised August 17, 2011
This manual applies to the PmodBT2 rev. A
Overview
The PmodBT2 is a powerful peripheral module employing the Roving Networks® RN-42 to create a fully integrated
Bluetooth interface.
The PmodBT2.
1
Functional Description
The PmodBT2 uses a standard 12-pin connection and communicates via UART. There is a secondary SPI header on
the board for updating the RN-42 firmware if needed.
1.1
Jumper Settings
The PmodBT2 has several modes available to the user via jumper settings. JP1 through JP4 provide various modes
of operation as indicated in Table 1 below. Each jumper is active when shorted. JP1 restores the device to factor
default settings after three transitions of the jumper setting (short-to-open or open-to-short). After the third
transition, the device returns to factor default except for the Bluetooth name. The other three jumpers, JP2-JP4,
only sample in the first 500 ms of operation to allow the pins that they tie to on the RN-42 module to serve a
separate purpose later in the modules operation. JP2 enables pairing with a special device class defined by the
user in software. This may be used so that the PmodBT2 operates as a substitute for an RS232 cable. JP3 enables
auto connect to a stored address defined by the user. Finally, JP4 chooses whether to operate at the stored baud
rate (115.2kbps default) or a baud rate of 9600 regardless of the software selected rate when shorted. For more
detailed information on jumper settings and functionality, refer to the RN-42 user manual.
DOC#: 502-214
Other product and company names mentioned may be trademarks of their respective owners.
Features include:
Bluetooth 2.1/2.0/1.2/1.1 compatible
Simple UART Interface
A wide range of modes including: Slave Mode, Master
Mode, Trigger Master Mode, Auto-connect Master Mode,
Auto-connect DTR Mode, and Auto-connect ANY Mode.
Small form factor: 1.5" x 0.8"
Copyright Digilent, Inc. All rights reserved.
1300 Henley Court
Pullman, WA 99163
509.334.6306
www.digilentinc.com
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Summary of Contents for Digilent PmodBT2
- Page 1 JP2 enables pairing with a special device class defined by the user in software. This may be used so that the PmodBT2 operates as a substitute for an RS232 cable. JP3 enables auto connect to a stored address defined by the user. Finally, JP4 chooses whether to operate at the stored baud rate (115.2kbps default) or a baud rate of 9600 regardless of the software selected rate when shorted.
- Page 2 Command Mode In order to enter the command mode, the PmodBT2 must receive "$$$" to which it will respond "CMD". When in command mode, the module will respond to a large number of commands allowing the user to customizing the Copyright Digilent, Inc.
- Page 3 The various modes of operation are accessed by using the "SM,<5,4,3,2,1,0>" command while in command mode. The PmodBT2 can be put into one of six available modes of operation. The modes in order, 0 to 5, are: slave, master, trigger master, auto-connect, auto-connect DTR, and auto-connect ANY. For more detailed information on the different modes of operation, refer to the RN-42 user manual.
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