sl-jetson 9239df4d26 feat: Add FC↔Orin UART verification (Issue #362)
Implements UART bridge verification between Flight Controller (STM32F722)
and Jetson Orin.

Changes:
1. jetson/scripts/uart_test.py (12.7 KB)
   - Opens /dev/ttyTHS1 at 921600 baud
   - Sends jlink binary test frames (PING, VERSION, ECHO)
   - Verifies CRC16-CCITT frame integrity
   - Logs transactions with timestamps
   - JSON result export and optional MQTT publishing

2. jetson/ros2_ws/src/saltybot_bridge/launch/uart_bridge.launch.py
   - ROS2 launch file for serial_bridge_node on UART port
   - Configurable port (default /dev/ttyTHS1), baud rate (921600)
   - Bridges FC telemetry to /saltybot/imu, /saltybot/balance_state
   - Publishes diagnostics to /diagnostics

Usage:
  Test: sudo python3 jetson/scripts/uart_test.py
  Launch: ros2 launch saltybot_bridge uart_bridge.launch.py

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-03-03 17:30:31 -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.