I'm trying to pair a Sena PI with a Sena +mesh so three PIs can be used together. I have read that it's possible but I can't get the blue tooth to pair, the PI times out waiting. Two PIs will pair with each other but they don't see the +mesh unit while it's in pairing mode. Has anyone tried the combination? The app for the +mesh does not seem to generate a QR code for the SIP ....Is there a trick to add the +mesh to the pairing list?