I apologize if this question is too vague, but I only have a basic knowledge of embedded systems and I know very little about bluetooth.
I am researching for a project in which I want to use a BM70 or BM71 module to act as a source using A2DP to stream audio to a bluetooth speaker. I want to use the BM70/71 in manual mode using a host MCU that controls the BM70/71 using UART. I've read the user manual for BM70/71 and I think I understand how I would discover and establish a connection with another bluetooth device. I've also read the A2DP spec and it seems like (though I'm not sure) I need to establish an L2CAP channel to send the A2DP messages between the devices.
I can't figure out how I can control the BM70/71 to establish the proper connection with the bluetooth speaker in order to send the A2DP commands.
I'm not looking for a complete answer, but just something to push me in the right direction, as I don't know what to search for at this point. I've searched for BM70/71 and L2CAP together but there seems to be nothing out there.