sl-mechanical
a2c554c232
- docs/: rewrite AGENTS.md, wiring-diagram.md (SAUL-TEE arch); update SALTYLAB.md, FACE_LCD_ANIMATION.md, board-viz.html, SALTYLAB-DETAILED refs - cad/: dimensions.scad FC params → ESP32-S3 BALANCE params - chassis/: ASSEMBLY.md, BOM.md, ip54_BOM.md, *.scad — FC_MOUNT_SPACING/ FC_PITCH → TBD ESP32-S3; Drone FC → MCU mount throughout - CLAUDE.md, TEAM.md: project desc → SAUL-TEE; hardware table → ESP32-S3/VESC - USB_CDC_BUG.md: marked ARCHIVED (legacy STM32 era) - AUTONOMOUS_ARMING.md: USB CDC → inter-board UART (ESP32-S3 BALANCE) - projects/saltybot/SLAM-SETUP-PLAN.md: FC/STM32F722 → BALANCE/CAN - jetson/docs/pinout.md, power-budget.md, README.md: STM32 bridge → CAN bridge - jetson/config/RECOVERY_BEHAVIORS.md: FC+Hoverboard → BALANCE+VESC - jetson/ros2_ws: stm32_protocol.py → esp32_protocol.py, stm32_cmd_node.py → esp32_cmd_node.py, mamba_protocol.py → balance_protocol.py; can_bridge_node imports updated - scripts/flash_firmware.py: DFU/STM32 → pio run -t upload - src/ include/: ARCHIVED headers added (legacy code preserved) - test/: ARCHIVED notices; STM32F722 comments marked LEGACY - ui/diagnostics_panel.html: Board/STM32 → ESP32-S3 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
309 lines
9.1 KiB
Markdown
309 lines
9.1 KiB
Markdown
# Jetson Orin Nano Super — GPIO / I2C / UART / CSI Pinout Reference
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## Self-Balancing Robot: ESP32-S3 BALANCE (CAN bus) + RealSense D435i + RPLIDAR A1M8 + 4× IMX219
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Last updated: 2026-02-28
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JetPack version: 6.x (L4T R36.x / Ubuntu 22.04)
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---
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## 40-Pin Header Overview
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The Jetson Orin Nano Super 40-pin header is physically compatible with Raspberry Pi HATs.
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Pin numbering follows **physical board pin** (1–40).
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```
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3.3V [ 1] [ 2] 5V
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SDA1 [ 3] [ 4] 5V ← I2C SDA (i2c-7 on Orin Nano)
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SCL1 [ 5] [ 6] GND ← I2C SCL (i2c-7 on Orin Nano)
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GPIO [ 7] [ 8] TXD0 ← UART TX (ttyTHS0)
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GND [ 9] [10] RXD0 ← UART RX (ttyTHS0)
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GPIO [11] [12] GPIO
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GPIO [13] [14] GND
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GPIO [15] [16] GPIO
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3.3V [17] [18] GPIO
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MOSI [19] [20] GND ← SPI1 MOSI
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MISO [21] [22] GPIO ← SPI1 MISO
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SCLK [23] [24] CE0 ← SPI1 CLK / CS0
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GND [25] [26] CE1 ← SPI1 CS1
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ID_SD[27] [28] ID_SC ← I2C ID EEPROM (reserved)
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GPIO [29] [30] GND
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GPIO [31] [32] GPIO
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GPIO [33] [34] GND
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GPIO [35] [36] GPIO
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GPIO [37] [38] GPIO
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GND [39] [40] GPIO
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```
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**Note on Orin Nano I2C bus numbering:** The 40-pin header I2C pins (3/5) map to
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`/dev/i2c-7` on Orin Nano (not i2c-1 as on the older Nano). Verify with:
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```bash
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ls /dev/i2c-*
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i2cdetect -l
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```
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---
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## 1. ESP32-S3 BALANCE Bridge (CAN bus — Primary)
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The ESP32-S3 BALANCE acts as a real-time motor + IMU controller. Communication is via **CAN bus** through a CANable 2.0 USB-CAN adapter.
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### CAN Bus Connection
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| Connection | Detail |
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|-----------|--------|
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| Interface | CANable 2.0 USB-CAN adapter → USB-A on Jetson |
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| Device node | `/dev/can0` (via CANable 2.0, SocketCAN) |
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| Bitrate | 500 kbps |
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| Protocol | Binary CAN frames (see balance_protocol.py) |
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| Power | ESP32-S3 BALANCE powered from robot 5V DC-DC |
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### Bring Up CAN Interface
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```bash
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# Bring up can0 at 500 kbps
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sudo ip link set can0 up type can bitrate 500000
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ip link show can0
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# Quick test — dump CAN frames
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candump can0
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```
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**ROS2 topics (CAN bridge node):**
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| ROS2 Topic | Direction | Content |
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|-----------|-----------|---------
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| `/saltybot/imu` | ESP32-S3→Jetson | IMU data (accel, gyro) at 50Hz |
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| `/saltybot/balance_state` | ESP32-S3→Jetson | Motor cmd, pitch, state |
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| `/cmd_vel` | Jetson→CAN 0x300 | Velocity commands via CAN |
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| `/saltybot/estop` | Jetson→CAN 0x302 | Emergency stop |
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---
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## 2. RealSense D435i (USB 3.1)
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### Connection
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| Parameter | Value |
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|-----------|-------|
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| Interface | USB 3.1 Gen 1 (USB-A on Jetson — use blue port) |
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| Device node | `/dev/bus/usb/...` (udev-managed) |
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| USB PID:VID | `0x8086:0x0b3a` (D435i) |
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| Power draw | ~1.5W active, 3.5W peak during init |
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| Cable | USB 3.1 — use **short cable ≤1m** for stability |
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**Note:** Orin Nano Developer Kit has **2× USB-A + 1× USB-C**. Use USB-A (blue = USB 3.1) for D435i.
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```bash
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lsusb | grep Intel
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# Expected: Bus 002 Device 003: ID 8086:0b3a Intel Corp. Intel RealSense D435i
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```
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**ROS2 topics:**
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| Topic | Type | Rate |
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|-------|------|------|
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| `/camera/color/image_raw` | `sensor_msgs/Image` | 30Hz |
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| `/camera/depth/image_rect_raw` | `sensor_msgs/Image` | 30Hz |
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| `/camera/aligned_depth_to_color/image_raw` | `sensor_msgs/Image` | 30Hz |
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| `/camera/imu` | `sensor_msgs/Imu` | 400Hz |
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---
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## 3. RPLIDAR A1M8 (UART via USB adapter)
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### Connection
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| Parameter | Value |
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|-----------|-------|
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| Interface | USB Micro-B (via included CP2102 USB-UART adapter) |
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| Device node | `/dev/ttyUSB0` → symlink `/dev/rplidar` (via udev) |
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| Baud rate | 115200 |
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| Power draw | ~2.6W motor on, 0.4W idle |
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| Motor control | DTR line (handled by rplidar_ros driver) |
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```bash
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ls /dev/rplidar # should exist after udev rule applied
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ros2 launch rplidar_ros rplidar_a1_launch.py serial_port:=/dev/rplidar
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```
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**ROS2 topics:**
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| Topic | Type | Rate |
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|-------|------|------|
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| `/scan` | `sensor_msgs/LaserScan` | 10Hz |
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---
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## 4. 4× IMX219 CSI Cameras (MIPI CSI-2)
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The IMX219 (Sony 8MP) cameras connect via MIPI CSI-2 FFC cables to the Jetson Orin Nano.
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### CSI Connector Layout (Orin Nano Developer Kit)
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The Orin Nano Developer Kit has two MIPI CSI-2 connectors:
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- **CSI-A (J5):** 15-pin FFC — connects to ArduCam adapter A
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- **CSI-B (J8):** 15-pin FFC — connects to ArduCam adapter B
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Each ArduCam multi-camera adapter multiplexes 2× IMX219 cameras onto one CSI lane.
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### ArduCam Multi-Camera Adapter Wiring
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| Adapter | Cameras | CSI Connector | V4L2 Devices |
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|---------|---------|---------------|--------------|
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| Adapter A (CSI-A) | front + left | J5 | `/dev/video0`, `/dev/video2` |
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| Adapter B (CSI-B) | rear + right | J8 | `/dev/video4`, `/dev/video6` |
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### IMX219 15-pin FFC Pinout (each camera module)
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| Pin | Signal | Notes |
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|-----|--------|-------|
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| 1 | GND | |
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| 2 | CSI D0- | MIPI data lane 0 negative |
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| 3 | CSI D0+ | MIPI data lane 0 positive |
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| 4 | GND | |
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| 5 | CSI D1- | MIPI data lane 1 negative |
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| 6 | CSI D1+ | MIPI data lane 1 positive |
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| 7 | GND | |
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| 8 | CSI CLK- | MIPI clock negative |
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| 9 | CSI CLK+ | MIPI clock positive |
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| 10 | GND | |
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| 11 | CAM_GPIO | Camera enable (active high) |
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| 12 | CAM_CLK | I2C / control clock |
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| 13 | CAM_SDA | I2C data |
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| 14 | GND | |
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| 15 | 3.3V | Power |
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### V4L2 Device Nodes
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```bash
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# List all video devices
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v4l2-ctl --list-devices
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# Expected output:
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# vi-output, imx219 2-0010 (platform:tegra-capture-vi:0):
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# /dev/video0
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# vi-output, imx219 2-0010 (platform:tegra-capture-vi:1):
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# /dev/video2
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# vi-output, imx219 4-0010 (platform:tegra-capture-vi:2):
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# /dev/video4
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# vi-output, imx219 4-0010 (platform:tegra-capture-vi:3):
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# /dev/video6
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# Capture test (GStreamer)
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gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! \
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'video/x-raw(memory:NVMM),width=640,height=480,framerate=30/1' ! \
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nvvidconv ! xvimagesink
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# Capture via V4L2
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v4l2-ctl --device=/dev/video0 --stream-mmap --stream-count=1 \
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--set-fmt-video=width=640,height=480,pixelformat=RG10
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```
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### ROS2 Topics (saltybot_cameras package)
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| Topic | Camera | Type | Rate |
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|-------|--------|------|------|
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| `/camera/front/image_raw` | front (video0) | `sensor_msgs/Image` | 30Hz |
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| `/camera/left/image_raw` | left (video2) | `sensor_msgs/Image` | 30Hz |
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| `/camera/rear/image_raw` | rear (video4) | `sensor_msgs/Image` | 30Hz |
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| `/camera/right/image_raw` | right (video6) | `sensor_msgs/Image` | 30Hz |
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### TF Frames
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| Camera | Frame ID | Offset from sensor_head_link |
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|--------|----------|------------------------------|
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| front | `camera_front_link` | x=+0.05m, yaw=0° |
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| left | `camera_left_link` | y=+0.05m, yaw=+90° |
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| rear | `camera_rear_link` | x=-0.05m, yaw=180° |
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| right | `camera_right_link` | y=-0.05m, yaw=-90° |
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---
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## 5. I2C Bus (i2c-7) — Pin 3 / Pin 5
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Available for future peripherals (IMU breakout, OLED display, etc.).
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| Parameter | Value |
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|-----------|-------|
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| Jetson I2C bus | i2c-7 (pins 3 = SDA, 5 = SCL) on Orin Nano |
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| Voltage | 3.3V pull-up |
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| Max clock | 400kHz (Fast Mode) |
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```bash
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# Scan i2c-7 bus
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i2cdetect -y -r 7
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```
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**Note:** i2c-0 (pins 27/28) is reserved for EEPROM ID — do not use.
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---
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## 6. M.2 NVMe Storage
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The Orin Nano Developer Kit includes an M.2 Key M slot.
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| Parameter | Value |
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|-----------|-------|
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| Interface | PCIe Gen 3 ×4 |
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| Form factor | M.2 2230 / 2242 / 2280 |
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| Recommended | 256GB+ NVMe SSD (e.g., WD SN530, Samsung PM991) |
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| Mount point | `/mnt/nvme` |
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```bash
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# Verify NVMe detected
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lsblk | grep nvme
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nvme list
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# Partition + format (one-time setup — see setup-jetson.sh)
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sudo parted /dev/nvme0n1 mklabel gpt
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sudo parted /dev/nvme0n1 mkpart primary ext4 0% 100%
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sudo mkfs.ext4 /dev/nvme0n1p1
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sudo mkdir -p /mnt/nvme
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```
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---
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## 7. USB Ports Summary
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| Port | Type | Used For |
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|------|------|----------|
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| USB-A (top, blue) | USB 3.1 Gen 1 | RealSense D435i |
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| USB-A (bottom) | USB 2.0 | RPLIDAR (via USB-UART adapter) |
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| USB-C | USB 3.1 Gen 1 (+ DP) | CANable 2.0 or host flash |
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| Micro-USB | Debug/flash | JetPack flash only |
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---
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## 8. GPIO Summary Table
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| Physical Pin | Function | Voltage | Used For |
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|-------------|----------|---------|----------|
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| 3 | SDA1 | 3.3V | I2C data (i2c-7) |
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| 5 | SCL1 | 3.3V | I2C clock (i2c-7) |
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| 8 | TXD0 | 3.3V | UART TX → ESP32-S3 IO (inter-board, fallback) |
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| 10 | RXD0 | 3.3V | UART RX ← ESP32-S3 IO (inter-board, fallback) |
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| USB-A ×2 | — | 5V | D435i, RPLIDAR |
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| USB-C | — | 5V | CANable 2.0 (CAN bus) |
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| CSI-A (J5) | MIPI CSI-2 | — | Cameras front + left |
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| CSI-B (J8) | MIPI CSI-2 | — | Cameras rear + right |
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| M.2 Key M | PCIe Gen3 ×4 | — | NVMe SSD |
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---
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## 9. udev Rules
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Apply stable device names:
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```bash
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# /etc/udev/rules.d/99-saltybot.rules
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# RPLIDAR A1M8 (SiliconLabs CP2102)
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KERNEL=="ttyUSB*", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", \
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SYMLINK+="rplidar", MODE="0666"
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# CANable 2.0 USB-CAN adapter
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# (bring up with: sudo ip link set can0 up type can bitrate 500000)
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KERNEL=="ttyACM*", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", \
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SYMLINK+="balance", MODE="0666"
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# Intel RealSense D435i
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SUBSYSTEM=="usb", ATTRS{idVendor}=="8086", ATTRS{idProduct}=="0b3a", \
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MODE="0666"
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# IMX219 CSI cameras (V4L2)
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KERNEL=="video[0246]", SUBSYSTEM=="video4linux", MODE="0666"
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```
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```bash
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sudo cp docs/99-saltybot.rules /etc/udev/rules.d/
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sudo udevadm control --reload-rules && sudo udevadm trigger
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```
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