Bluetooth Module - Serial pass-through module 

We think this little bluetooth gadget is great. Supply it with power and you get a TTL UART on one side and Blue Tooth virtual com port on the other.

One of the nice qualities is, it is pretty easy setup right away and it seems to run fine without much of any configuration for simple applications.

There are lots of technical docs out there with a simple google search from different open source projects and the Arduino community. It looks like many different developers of embedded projects are using this module or very similar modules successfully.  So basically you going to find plenty of support on how to get this working.

If you are looking to add wireless serial links to your projects, this little module seems to have great potential!

Module Highlights and details:

• Working Voltage : 3.5 to 5 (VDC)
• Default Baud: 9600 Serial Comm (Supports 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200 baud)
• Free Cable: Comes with connection cable (7inch or 18cm length) or use your own setup.
• 4 pins - RX, TX, GND, VCC (3.3 to 5V)
• Works with existing Serial port based sketches and programs
• Usable with Arduino, Papilio, or other Dev boards lots of documentation available.

Technical data & External links

We have done some research on this and similar type Bluetooth modules here are some great external links below:

• Byron has some great info on his blog: Overview Info
• Upgraded Firmware - How to upgrade Firmware
• An Arduino Sketch - For the Papilio we need to convert to Hardware serial or make Software Serial libraries work on AVR8 and ZPUino.
• Arduino Forum thread with lots of juicy details

Youtube Video - Shows the module in action.