This is a redesigned Arduino Bluetooth shield based on our BC04-A module, which is Arduino stackable and uses Arduino pins 3 and 4 as software serial ports for communication.

Bluetooth:

• Master/Slave selectable, based on BC04-B module
• LED indicator the Bluetooth status; fast flashing means not paired yet; constant high status is paired. This is also connected to the Arduino digital pin 2.
• The reset button can clear the pairing status.
• Prototype onboard area.

Settings:

• UART D0/D1 or D3/D4: Use either software serial port of Arduino digital pin 3 (RX) and 4 (TX) or original UART port of digital pin 1 (TX) and 0 (RX)
• Output to Pins or Arduino: Connect the uart of the Bluetooth module to either external serial pins or to the Arduino board.
• Hardware/Software, Hardware Master/Slave Setup Jumpers. When this is not used, they will be set up by software.