Place a jumper pin in MODE.
Upload this code. https://gist.github.com/e-Gizmo/fd8be52c32971e311f74 Baudrate: 9600 (default)
Once you've uploaded the code, use wires on the pin 0 (RX) connect it to pin 8 of Arduino/gizDuino and pin 1 (TX) connect it to pin 9. You can attach the BT shield on the power source to Arduino.
Open the Serial Monitor then set the baudrate 9600 and Both NL & CR. "Ready for configuration " will show.
Type "AT "then SEND.
The response will be OK.Tags: Bluetooth Shield, HC-05