What I want to do is install the raspberry pi in my car. What it will do is connect to my speakers in my car and give off a wifi hotspot. This hotspot will not actually connect to the internet. Instead you will connect to it through your phone and multiple people can connect to it and anyone can play music through it coming out of the car radio.
I'd like to do this instead of the two way bluetooth thats already in the car so i can have multiple phones connected to play at any time. I was wondering how to be able to do this with the raspberry pi.
I understand all the hardware but am not sure if there is already software to help speed my project up because its already availiable.