This project focuses on the development of a Bluetooth Low Energy (LE) Audio Transmitter supporting the Auracast standard.

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Bluetooth LE Audio (Auracast) Transmitter

Phase: Proof of Concept (Simulation)

Overview

This project focuses on the development of a Bluetooth Low Energy (LE) Audio Transmitter supporting the Auracast standard. The current phase is a Proof of Concept (PoC) simulation, demonstrating system functionality without physical hardware implementation. The project uses an NXP NXH3675 transceiver integrated with an Arduino-compatible controller for simulation purposes.

Objectives

Simulate the transmission of BLE Audio streams using Auracast protocol.
Validate communication between NXH3675 transceiver and controller firmware.
Demonstrate Proof of Concept without creating physical hardware.
Provide a basis for future hardware development and testing.

Features (Simulation Phase)

BLE Audio packet simulation
Controller-to-transceiver communication over I²C/SPI (simulated)
Basic audio stream configuration and management
Logging of simulated data for analysis

Hardware (Simulation Reference)

NXH3675 BLE Audio Transceiver (NXP)
Arduino-compatible MCU (simulation platform) > Note: Hardware is referenced for simulation purposes; no physical hardware is required in this phase.

Software Requirements

Arduino IDE or PlatformIO
Python (for simulation scripts)
Serial Monitor / Logging tool for output verification
Git (for version control)

Project Structure

/project ├─ /src # Source code for simulation ├─ /docs # Documentation and diagrams ├─ /test # Program for function Test ├─ README.md └─ LICENSE

How to simulate

Open the src folder.
The ESP32 program is located in src/main.
The Node.js backend program is located in src/web_side/read_serial.js.
The web interface is located in src/web_side/index.html.
Connect the ESP32 to your computer using a Serial-to-USB cable.
Open read_serial.js and adjust the ESP32 port based on the port shown in Device Manager.
Open a terminal and navigate to: cd ../ble_auracast/src/web_side
Once the ESP32 is connected, run: node read_serial.js
Open index.html in your browser.
Click the "Open Port" button.
After the port is open, all logs and BLE connection information will appear when the ESP32 connects to a BLE client.