I bought this small module to my Arduino to make a BT interface. The use is very simple. The reference voltage and provide either directly to the existing TX / RX pins terminals or what is more recommended to use alternative Pins (Soft Serial). The TX / RX ports must I think be crossed (ie from TX RX module with the Arduino and vice versa). With an app like Arduino Bluetooth you can immediately test the functionality and get going. Anyone with time and patience can also be relatively easy to write his own app to communicate with the chip.
I am full of peace and do not regret that I have ordered two :) Works really great and the price is really awesome!
