How do all these bluetooth things play with each other ?
The SR10 acts as an adapter for the CB radio. But it also acts as a gateway for the GPS and mobile phone and intercom bike to bike as well as other headsets on the bike (passenger).
The SMH10 headset acts as an intercom, and connects to the mobile phone and the GPS.
Is there some order to pair the units in so they don't step all over each other ?
For bike to bike or driver/passenger comms, you only need the BT headsets. They bind to each other for comms. Be careful which set your order as some models have a smaller limited amount of headsets you can bind to.
The SR10 you are correct is for connecting a CB and getting it to work to a BT headset. You would bind the SR10 to a headset. I have not fully studied the SR10 to see if you can bind more than one headset.
As a gateway for a GPS or phone, just remember the SR10 is MONO only not stereo. So if you plan to play music from your GPS or phone remember that. There are a couple ways to hook a GPS or phone to the SR10.
1) Use a cable from the GPS or phone to the AUX on the SR10. Not additional binding to the headset needed.
2) Bind the GPS or phone directly to your headset (No SR10 is then needed for this!). Note: not all GPS units can bind to a headset! The ZUMO's can.
3) Bind the GPS or phone to the SR10. The SR10 will then stream any audio from the phone or GPS to the headsets.
Now if you want to hear the BRP radio or anything it is playing (like your iPod) you could use the SR10 and a dongle cable BUT this is not the best way as it will not be stereo.
For this you need the SM10 audio streaming device and a dongle cable to run it to the RD02 connector on the BRP radio.
The way you can use or bind the SM10 to headsets is the same as above for the SR10.
Yes, the SR10 and SM10 will play together and both can be bound to your headsets.
Now as far as the order in which all this gets bound to each other.......
You can bind these in just about any order you want HOWEVER I have found that the order is important or things tend to not work well. The order is kind of outlined in the Sena instructions but not specifically.
In my opinion this is the best way.
1) Bind all helmet systems first. Make your driver helmet #1 of master first bind.
2) Bind any phone or GPS to your helmet if you want to go this route rather than through a SM10 or SR10. If you want to bind the GPS or Phone to the SR or SM10, skip this and go on.
3) Bind the SR10 to your headsets next if you have that for CB.
4) Bind the SM10 to the headsets next if you have that for stereo.
5) Now bind your Phone or GPS to the SR10 or SM10. I would go with the SM10 over the SR10 for stereo. Don't do this step if you decided to bind your phone or GPS directly to the helmets.
Bob