I have an XS3868 Bluetooth Audio Module which is based around the OVC3860 chip. It's AT commands are well documented as well. I found them here. Then I took up my Arduino UNO and converted it into a USB to TTL converter as stated here. All was well until I started the serial session using Arduino IDE's in-built Serial Monitor. I set the baud rate to 115200bps and started entering the commands. The commands did seem to work but there was one problem, and that was that the module wasn't responding as "OK" as it should have as stated in the datasheet. Let me tell you again, the AT commands do work, but I'm not receiving any "OK" in the Serial Monitor. Why do I care? It's because I have to give some enquiry commands to the chip but I'm not able to receive anything.
