Bluetooth-LE-Audio-Auracast-Transmitter

Bluetooth LE Audio (Auracast) Transmitter

Phase: Proof of Concept (Simulation)

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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.

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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.

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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

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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.

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Software Requirements

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

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Project Structure

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

How to simulate

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