Raspberry Pi Audio & Communication Node

This module configures a Raspberry Pi 4 Model B as an audio interface and communication bridge between hardware devices and the central server.

Hardware Requirements

• Raspberry Pi 4 Model B
• ReSpeaker Microphone Array
• External Speaker

Overview

The Raspberry Pi is responsible for:

• Capturing voice input from the microphone array
• Forwarding raw audio streams to the server
• Receiving raw audio from the server and playing it through the speaker
• Detecting nearby Bluetooth devices and publishing results

System Components

The system includes the following nodes:

• Audio Capture: Captures microphone input and sends raw audio to the server
• TTS Player (tts_player): Receives audio data and plays it through the speaker
• Bluetooth Scanner (bt_scan_publisher): Detects nearby Bluetooth devices and publishes detections

Setup Instructions

1. Build Docker Container

Navigate to the docker directory and build the container:

cd docker
docker build -t rpi_audio_node .

2. Run the System

After building the container and cloning this repository inside it, start all required nodes using:

./start.sh

This script will initialize all components, including audio streaming and Bluetooth scanning.

Notes

• Ensure that the ReSpeaker microphone array and speaker are properly connected before starting the system.
• The system assumes a running server capable of handling raw audio streams.
• Bluetooth functionality depends on the Raspberry Pi’s Bluetooth interface being enabled.

If you want, I can make this consistent with your other README (simulator + ROS2) so everything in the repo follows the same style.