Learned something new about Bluetooth

In general, host devices support up to 7 simultaneously connected devices and a practically unlimited number of paired. Host devices are like a wireless router - you can connect many different devices at a time.

Client devices typically support a limited number of pairings, anywhere between 1 and 5, and only one single connection. They act like a wireless client - you can save many different networks but only connect to one at a time.

In a car, your phone would be a host device and the Garmin a client device. The translator would be a 2nd client device.

I do it the easy way. I still use an old nuvi 760. It connects to the car audio so the directions come from the car speakers and I can hear them easily. It plays .mp3 and .aud files so I can listen to audio books/podcasts/whatever. It interrupts the books to give me directions and then resumes the books seamlessly. These are the reasons I have never "upgraded" to a newer and fancier car gps unit.

There's a major new Bluetooth standard in the pipeline, coming sooner than later, possibly late 2020, that promises even more sharing options. See for example (though this is a just a part of the feature changes):
https://www.digitaltrends.com/home-theater/bluetooth-le-audi...

They try to make these major version upgrades backwards-compatible, meaning that older devices developed under earlier standards still work, but that can be a crapshoot. Good with USB. Not so good with device drivers in PCs.

I'm very dependent on Bluetooth in my hearing aids. Now that almost all TVs project sound behind to reflect off the wall, my ability to understand TV dialogue takes a big hit, just as it does if I'm trying to understand someone talking who's facing away from me. But with Bluetooth, a TV sound streaming device, and my Bluetooth-equipped hearing aids, I can hear TV dialogue very well.

But right now, I can pair my iPhone to the car, my iPhone to my hearing aids, but I can't pair my hearing aids to a vehicle's audio with Bluetooth. I need to play directions over car speakers for good comprehension.

I upgraded from a Nuvi 765 to the Streetsmart 65 and I do miss the FM transmitter and mp3 capability. However the larger 7" screen and smart phone connectivity is worth loosing the mp3 and fm transmitter. I am thrilled with the new features of the 65. The price I payed for a factory refurb made it a sweet deal!

Complex indeed. Some devices interfere with each other when paired simultaneously however. It's often a trial & error situation. Hopefully, the new Bluetooth format will solve some of these issues.

I am already doing it! its really nice try indeed

My Garmin always pairs sucessfully with my phone, however, my Chinese bluetooth/FM transmitter is hit or miss, sometimes pairing with my phone and sometimes not pairing. I then have to manually pair it from my phone.

Any techniques that will improve the hit or miss bluetooth pairing?