sl-controls
783dedf4d4
Two new ROS2 packages implementing Issue #158: saltybot_docking_msgs (ament_cmake) - DockingStatus.msg: stamp, state, dock_detected, distance_m, lateral_error_m, battery_pct, charging, aligned - Dock.srv / Undock.srv: force + resume_mission flags saltybot_docking (ament_python, 20 Hz) - dock_detector.py: ArucoDetector (cv2.aruco PnP → DockPose) + IRBeaconDetector (EMA envelope with amplitude threshold); both gracefully degrade if unavailable - visual_servo.py: IBVS proportional controller — v = k_lin×(d−target), ω = −k_ang×yaw; aligned when |lateral| < 5mm AND d < contact_distance - charge_monitor.py: edge-triggered events (CHARGING_STARTED/STOPPED, THRESHOLD_LOW at 15%, THRESHOLD_HIGH at 80%) - docking_state_machine.py: 7-state FSM (IDLE→DETECTING→NAV2_APPROACH→ VISUAL_SERVO→CONTACT→CHARGING→UNDOCKING); mission_resume signal on auto-dock cycle; contact retry on timeout; lost-detection timeout - docking_node.py: 20Hz ROS2 node; Nav2 NavigateToPose action client (optional); /saltybot/dock + /saltybot/undock services; /saltybot/docking_cmd_vel; /saltybot/resume_mission; /saltybot/docking_status - config/docking_params.yaml, launch/docking.launch.py Tests: 64/64 passing (IRBeaconDetector, VisualServo, ChargeMonitor, DockingStateMachine — all state transitions and guard conditions covered) Co-Authored-By: Claude Sonnet 4.6 <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.