This component uses the ESP32-CAM with the OV2640 camera module for the Rusty Secure system.

1. After cloning the repository, initialize the ESP32-CAM component submodule:

git submodule update --init

2. Check that the esp32-camera component is properly installed in the components/esp32-camera directory.

3. Install the ESP Rust toolchain (channel = "esp" in rust-toolchain.toml). See esp-rs/rust-build for instructions.

Two shell scripts are provided for convenience:

./dev.sh                           # build, flash & monitor
./dev.sh --erase                   # full erase before flashing
./dev.sh --port /dev/tty.usbserial-140  # specify serial port

./release.sh                       # build, flash & monitor
./release.sh --erase               # full erase before flashing
./release.sh --port /dev/tty.usbserial-140  # specify serial port

Use --erase when switching between bootloader versions or after major sdkconfig changes.

cargo +esp build                   # dev build
cargo +esp build --release         # release build
espflash flash target/xtensa-esp32-espidf/release/esp32-cam --monitor

• Uses ESP-IDF (std) with FreeRTOS — the camera driver requires the full ESP-IDF framework.
• HTTP server listens for /capture requests, triggers the camera, and uploads the image to the API server.
• The Espressif camera driver is written in C; Rust bindings are generated at build time from components/bindings.h.

• PSRAM (SPIRAM) is enabled in sdkconfig.defaults for camera frame buffers.
• The flash LED on GPIO4 is toggled during capture for lighting.
• For more information, see the reference project: https://github.com/jlocash/esp-camera-rs