I've been working on a project that is using an arduino and a bluetooth chip that communicates with an Android device. I am using an Arduino Duemilanova and a RN42-XV Bluetooth Module. I am using the 3.3V arduino supply to power the microcontroller and then have connected TX - Arduino RX and RX to Arduino TX via a 10k/20k voltage divider. On the android I have been using BlueTerm for testing. When I short RX and TX of the RN42 the chip will echo back the character, but when I connect to the arduino I am unable to get it to echo or display the right character. I have gotten it to show ÿ when I type a character on BlueTerm, but it wont echo back. I've already checked the BaudRate (9600) and the RX/TX, TX/RX pins, but I am stuck on how to make it work. I would like to be able to write characters from the arduino and have it display on the BlueTerm.
There's no picture of your wiring and no code (sketch your testing with).
Also provide links to the hardware you use and it's datasheet.