sl-firmware 6f3dd46285 feat: Add Issue #503 - Audio pipeline with Jabra SPEAK 810
Implement full audio pipeline with:
- Jabra SPEAK 810 USB audio I/O (mic + speaker)
- openwakeword 'Hey Salty' wake word detection
- whisper.cpp GPU-accelerated STT (small/base/medium/large models)
- piper TTS synthesis and playback
- Audio state machine: listening → processing → speaking
- MQTT status and state reporting
- Real-time latency metrics tracking

ROS2 Topics Published:
- /saltybot/speech/transcribed_text: STT output for voice router
- /saltybot/audio/state: Current audio state
- /saltybot/audio/status: JSON metrics with latencies

MQTT Topics:
- saltybot/audio/state: Current state (listening/processing/speaking)
- saltybot/audio/status: Complete status JSON

Configuration parameters in yaml:
- device_name: Jabra device pattern
- wake_word_threshold: 0.5 (tunable)
- whisper_model: small/base/medium/large
- mqtt_enabled: true/false with broker config

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-03-06 10:30:58 -05:00
..

Jetson Nano — AI/SLAM Platform Setup

Self-balancing robot: Jetson Nano dev environment for ROS2 Humble + SLAM stack.

Stack

Component Version / Part
Platform Jetson Nano 4GB
JetPack 4.6 (L4T R32.6.1, CUDA 10.2)
ROS2 Humble Hawksbill
DDS CycloneDDS
SLAM slam_toolbox
Nav Nav2
Depth camera Intel RealSense D435i
LiDAR RPLIDAR A1M8
MCU bridge STM32F722 (USB CDC @ 921600)

Quick Start

# 1. Host setup (once, on fresh JetPack 4.6)
sudo bash scripts/setup-jetson.sh

# 2. Build Docker image
bash scripts/build-and-run.sh build

# 3. Start full stack
bash scripts/build-and-run.sh up

# 4. Open ROS2 shell
bash scripts/build-and-run.sh shell

Docs

Files

jetson/
├── Dockerfile              # L4T base + ROS2 Humble + SLAM packages
├── docker-compose.yml      # Multi-service stack (ROS2, RPLIDAR, D435i, STM32)
├── README.md               # This file
├── docs/
│   ├── pinout.md           # GPIO/I2C/UART pinout reference
│   └── power-budget.md     # Power budget analysis (10W envelope)
└── scripts/
    ├── entrypoint.sh       # Docker container entrypoint
    ├── setup-jetson.sh     # Host setup (udev, Docker, nvpmodel)
    └── build-and-run.sh    # Build/run helper

Power Budget (Summary)

Scenario Total
Idle 2.9W
Nominal (SLAM active) ~10.2W
Peak 15.4W

Target: 10W (MAXN nvpmodel). Use RPLIDAR standby + 640p D435i for compliance. See docs/power-budget.md for full analysis.