I am using a XS-3868 rev.3 Bluetooh module (pinout), it'll work when I apply 4v on pins 29 and 31, but when I wire my Adafruit USL to TTL serial adapter to the TX, RX, and Ground I never have an option to input new AT commands to change the name of the device via the terminal.
I can connect just fine, but it'll only report back random characters when I power it on or connect/disconnect to it from my phone.