Does anybody have any experience of using a Tomtom 550 with a Nolan helmet equipped with their B1.4 Bluetooth kit? It all seems to work OK when I pair them but then forgets what to do when I power up the next time. Annoyingly they both pair to my S8 phone and reattach every time on start up but the connection phone to Nav only works at best occasionally. Googling about I find stuff several years old telling me to power them up in a specific sequence but that does nothing for my case.
Does the Nolan have a seperate channel for GPS/MP3? My Scala headset does and my old Zumo 550 was not happy until I figured that out, and it also works best if I allow the GPS to connect to my headset before my mobile. Not sure how relevent it is to your specific kit but hopefully may give some pointers.