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Recently I bought a BT module from eBay which was very cheap. I didn't really noticed the image and I just bought it. When it came I couldn't find any holes to solder the headers. Also the specific module is pretty rare and I couldn't find anything.
Here is an image:
How do I wire up this chip?
From the picture you posted, i was able to google and find something called a BC04-B Bluetooth serial module. It looks almost exactly like yours, and I found a diagram on how to hook it up.
I also believe that these are the serial commands you can use with it...
These Bluetooth modules are typically mounted onto another substrate, either the product board or a small PCB backplane which provides the pinouts and any additional circuitry like the pairing LED, and power- & signal-level management. They are readily available as HC-05 (master/slave) or HC-06 (slave only) with signals brought to through-holes or pins at the edge of the backplane.
