The RS2 and M2 do not see it when searching. I can connect to it with my laptop/tablet/phone. I am not sure if it is a BT protocol issue or what. I need to use SPP in my application.
To establish the Bluetooth connection, you need to initialize the pairing sequence on the receiver’s side. Here, the receiver is the Bluetooth serial adapter.
Can you clarify, please, do you use Parani’s adapter with a PC? Also, which version of the software is installed on your Reach RS2 and M2?
If there’s no possibility to initiate the connection from the monitor’s side, then, I’m afraid, there’s no trivial solution for connecting the Reach receiver to a BT adapter.
However, since the adapter has a static MAC you can preliminary pair Reach with an adapter using a software on your PC. After that, you may set up the position output on Reach’s side and check if the connection establishes when you plug the adapter into the monitor.