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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:

BlueTooth Module

How do I wire up this chip?

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    Are you able to post a clearer photo? If your camera has a close-up or 'macro' mode then it may help. – Peter Bloomfield Mar 1 '15 at 14:00
  • You at least post a link to the item on ebay; the blur pict you linked to is totally useless currently. – jfpoilpret Mar 1 '15 at 14:04
  • @jfpoilpret Not exactly useless, but it definitely needs improvement. – Avamander Aug 23 '15 at 21:34
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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. BC04-B Bluetooth serial module

I also believe that these are the serial commands you can use with it... Bluetooth module serial commands

  • It could be HC-06 or HC-05 but they operate quite similarly. – Avamander Aug 23 '15 at 21:34
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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.

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