Audio Streamer for Hearing Device - NEED HELP/ADIVCES

[Ospreys]

Hello!

To those who are reading this post, I need your help! I’m sure I will find here experienced and skilled people willing to give me a hand with this project.

First, I’m French, and even if I’ll do my best to write correctly in your language, I do apologize for my inevitable spelling and grammar mistakes.

My project is the following: build a “streamer module” which main goal is to do the connection between multimedia devices (smartphones, TV, radio) and noise-amplification ear plugs (small earplugs used by senior and hearing-impaired person).
For example, if the hearing-device user want to connect his/her hearing device to his/her smartphone, he/she needs an intermediary module making the link between the two.

Alright, now let’s get down to business.

You will find below the translation of a part of my design brief summarizing all the input and output connections of the module. And to spice things up, the streamer module needs to by inside a paralepidid of 8x8x4cm.

[IMG]https://ibb.co/QNZcR4W[/IMG]

I started my project on searching for audio stereo Bluetooth module (like this one: https://www.qualcomm.com/products/csr8645) to perform the Bluetooth <-> Jack 3.5mm connection.
Unfortunately, this one only does the Bluetooth  Jack 3.5mm connection and can’t go backyard. Moreover - as you can see in the table upward – I also need to do the Bluetooth <Bluetooth>192kbps which is the bit rate of the MP3 audio file). This module has an UART interface (RX and TX), but how am I supposed to send the digital audio data coming from my audio codec to the UART interface of the Bluetooth module? The only option I see is to use another module to make the link between the two… But what module, Arduino board?

I also looked at the RN4020-V/RM datasheet and I can’t see if this module can do full-duplex communication, receive and transmit at the same time.

I hope my explanations weren’t confusing… As you can see, I got myself involved in a project way to hard for my skills. But that is no reason to give up.

If you see anything odd or wrong with my way of thinking, please tell me.

Thank you so much for your help! You’re helping a young boy building up its skills, and this is priceless.