Autopilot Pi

Run the flash script

bash scripts/flash-pi.sh --device /dev/diskN --hostname ct-pi

• This script:
  • Downloads or uses cached Raspberry Pi OS Lite (64-bit) image
  • Flashes the image to the SD card
  • Mounts the boot partition for configuration
  • Enables SSH with key-based auth
  • Configures the Pi Camera Server to auto-start on boot

Configure WiFi Access Point

• The Pi runs as a WiFi AP so the iPad can connect directly without external network:

  bash scripts/flash-pi.sh --configure-ap \
    --ssid "CT-Scanner" \
    --password "scanner-secure-pw" \
    --channel 36 \
    --ip 10.0.0.1
  

• AP settings are written to the boot partition (no symlinks -- uses cp for FAT32 compatibility)
• The Pi assigns IPs in the 10.0.0.0/24 range via dnsmasq

Install camera firmware

• Configure dual IMX477 or IMX708 camera modules:

  bash scripts/flash-pi.sh --install-camera \
    --camera0 imx477 \
    --camera1 imx477
  

• This writes the dtoverlay entries to config.txt on the boot partition
• Camera server (Fastify, port 4801) streams both cameras over HTTP

Set environment variables

• Write the camera server .env to the rootfs partition:

  PORT=4801
  HOSTNAME=0.0.0.0
  CAMERA_0=/dev/video0
  CAMERA_1=/dev/video2
  RESOLUTION=3840x2160
  FPS=30
  CT_PC_URL=http://10.0.0.2:4802
  

Eject and boot

# macOS
diskutil eject /dev/diskN

# Linux
sudo eject /dev/sdX

• Insert SD card into Pi, power on, wait ~60 seconds for first boot

Verify Pi is running

• Connect to the CT-Scanner WiFi AP from your machine
• Check the camera server:

  curl -s http://10.0.0.1:4801/health
  

• Verify both cameras:

  curl -s http://10.0.0.1:4801/cameras
  

• Should report two cameras with resolution and status