sl-firmware
c66a5ce974
Implements central health monitoring system for SaltyBot with: - Heartbeat subscription from /saltybot/<node_name>/heartbeat - Dead node detection (>5s timeout, configurable) - Automatic restart via ros2 launch with configurable retry limits - System health publishing to /saltybot/system_health (JSON) - Face alert integration for CRITICAL node failures - Full_stack.launch.py integration at t=1s launch sequence Package structure: - saltybot_system_health: Main ROS2 package - health_monitor_node.py: Central monitoring node - msg/SystemHealth.msg, msg/NodeStatus.msg: Health status messages - config/health_monitor.yaml: Node definitions and criticality levels - launch/health_monitor.launch.py: Standalone launch Configuration: - heartbeat_timeout: 5.0 seconds (node marked DEAD if missing) - monitor_freq: 2.0 Hz (check interval) - auto_restart: enabled with max 3 restarts per node - face_alert: triggers on CRITICAL node down Node definitions include: robot_state_publisher, STM32 bridge, cmd_vel bridge, sensors (RPLIDAR, RealSense), SLAM (RTAB-Map), Nav2, perception, follower, and rosbridge. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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
docs/pinout.md— GPIO/I2C/UART pinout for all peripheralsdocs/power-budget.md— 10W power envelope analysis
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.