Bluetooth Handsfree Bounty

[JohnA]

OK, some progress. I was wrong thinking the update caused the problem.
In fact, when you set pipewire to connect to the local modem, the phone goes into "Audio Gateway" mode, and becomes unresponsive, not telling you about phonecalls and not being able to change the audio config via the sound menu. It was a coincidence the phone did an update at just the time I started to notice the problem, but there you go.
You cannot see a change of sound card state indicating there is an incoming call. However, there is a "pause" you can pick up on, and I've set my script to key on that.
The problem is, my script cannot see the call has ended - there's no change in the sound card to indicate that. So, you have to manually turn of the call at least at the interface and maybe at the phone, and then run the reset script so the phone is ready for the next call.
It may be possible to answer an incoming call from the car "answer" button, I've not checked that.
However, I do have an interface to the car that tell you the signal strength and battery state of charge, and even the name of the carrier, where you can type in you number to the car interface, and the phone will call, answer, and route the call to the car speaker and car mic. At least, that part happens automatically. The car is, however, confused about past calls, these are not downloaded into the car interface, you need to type in the actual number.
It may be that there is some way of programming/configuring pipewire / wireplumber to automatically change configuration and let other things around know about the change. But, in the meantime, I hope to tap into d-bus to find out what the call is doing. That might just be dbus-monitor with a select statement, which should have a minimum overhead, or might well be using the perl libraries. d-bus is a struggle, but it is slowly making more sense. Pipewire is pretty confusing, too.
Anyway, it works but it is at the stage of "stand on one leg, bend the other foot to rest on your knee and poke your tongue out while pressing a button".

Well done!

I increase my Donation Part https://forum.pine64.org/showthread.php?...#pid121187 to 300 Euro :-)

Ciao
Walter

BTW: where are you located?

Sydney, Australia.