Electrodragon has a Bluetooth module with HFP (hands free profile). They also has a provided comprehensive documentation for it, with all the serial communication AT commands populated.
Firmware development forum: https://groups.google.com/forum/#!for...
Product page: http://www.electrodragon.com/product/...
Documentation: http://www.electrodragon.com/w/BK8000L [LINK is DEAD! - Check forum for the copy of the online documentation!]
Index:
0:05 Introduction
1:04 Breakout module labeling dilemma
3:44 Powering the module
5:35 Testing the populated AT commands
6:51 Conclusion
Follow me:
🏠 https://sharedinventions.com/
Instagram: / sharedinventions