That is not a beginner project from either the software or hardware angles. And even if you did manage to cobble something together would you in your heart of hearts be confident of its reliability to function when needed? No, I wouldn't be at all confident in its reliability to function when neede...

Thanks very much Douglas6. I should have been more specific. This is kind of a home-made medical alert project. So I would like it to function as a one-button dialer and possibly play a pre-recorded message or turn on a mic that a person could use to communicate or activate the phone's speakerphone....

I know very little about programming. I'd like to get started with something I've wanted to do for a while. A basic Bluetooth speaker-phone that can connect to any Bluetooth capable phone. What's the smallest raspberry pi I can use to create my own Bluetooth speaker-phone with redial button, bright ...