Arduino + Bluetooth to act as a speakerphone for calls (and maybe music)

Projects General Guidance
1

Hi there,

I'd like to build a bluetooth device that connects to my iPhone and acts as a handsfree kit and a misic player.

I own quite an old car qith a built in Nokia phone type RTE-2RH model 6011 that is hidden in a glove box.

I was wondering if you could help me identifying this nokia O/I's.

1. HF-MIC-
2. HF-MIC SH.
3. HS-EAR
4. AUDIO OUT+
5. AUDIO OUT-
6 EXT SER SH.
7. EXT SER+
8.
9.
10.
11. EBUS-H
12.
13.
14.
15. CAR 12V
16. CAR 12V
17. HS-MIC+
18. HS-MIC
19. HS-GND
20. HS-PWR
21. HS-HOOK
22. EXT SER-
23.
24.
25. AIRBAG (airbag???)
26. KW-2000
27. EBUS-L
28. 
29.
30.
31. CAR GND
32. CAR GND

All I want is to replace the above nokia-phone-box with something that can use bluetooth so it puts my head unit into "phone-mute" mode and switches to arduino audio in/out at which point I could use my iPhone to talk whilst driving.

This is the the socket in my Siemens NCDC 2015 head unit which I believe is somehow connected to the above nokia,box

R+, G+, B+ and RGB are for the LCD screen and I'm not sure what's the rest.

I'd appreciate you advise!

2

Hi all,
I will by interested in this as well as I have the same car (Opel Omega) with exact same radio unit and Nokia unit in the glove box and spare Arduino Uno at home.

Thank you.