Stamp-AddOn Cam3660 ESPHome Integration

This tutorial explains how to connect Stamp-AddOn Cam3660 to Stamp-S3Bat and integrate it into Home Assistant through ESPHome.

1. Device Overview

2. Configuration

ESP32 Framework

The complete example uses the Arduino framework and configures the compilation options required by the camera:

esphome:
  name: stamp-addon-cam3660-example
  friendly_name: Stamp Addon Cam3660
  environment_variables:
    IDF_COMPONENT_STORAGE_URL: https://components-file.espressif.cn

esp32:
  board: esp32-s3-devkitc-1
  variant: esp32s3
  flash_size: 8MB
  framework:
    type: arduino
    sdkconfig_options:
      CONFIG_CAMERA_TASK_STACK_SIZE: "2048"
      CONFIG_CAMERA_PSRAM_DMA: "n"

Startup Initialization

Before the camera driver initializes, PWDN (GPIO39) must be pulled low, RESET (GPIO41) pulled high, and a 500ms delay applied. The complete example performs this startup sequence through M5Stack's early_init external component:

external_components:
  - source: github://m5stack/esphome-yaml/components@main
    components: [early_init]

early_init:
  id: camera_power_up_barrier
  pins:
    - pin:
        number: GPIO39
        allow_other_uses: true
      level: false
    - pin:
        number: GPIO41
        allow_other_uses: true
      level: true
  delay: 500ms

Camera Configuration

Cam3660 uses GPIO48/GPIO47 for the SCCB data lines, while image data is received through the 8-bit DVP interface. allow_other_uses: true allows the camera component to reuse GPIO39 and GPIO41 from the startup initialization stage:

i2c:
  - id: camera_i2c
    sda: GPIO48
    scl: GPIO47
    frequency: 100kHz

esp32_camera:
  name: "OV3660 Camera"
  id: cam
  i2c_id: camera_i2c
  data_pins:
    - GPIO21
    - GPIO18
    - GPIO16
    - GPIO15
    - GPIO14
    - GPIO12
    - GPIO38
    - GPIO40
  vsync_pin: GPIO42
  href_pin: GPIO17
  pixel_clock_pin: GPIO13
  external_clock:
    pin:
      number: GPIO46
      ignore_strapping_warning: true
    frequency: 20MHz
  power_down_pin:
    number: GPIO39
    allow_other_uses: true
  reset_pin:
    number: GPIO41
    allow_other_uses: true
  resolution: 320x240
  jpeg_quality: 12
  max_framerate: 10 fps
  idle_framerate: 0.5 fps
  frame_buffer_location: PSRAM
  frame_buffer_count: 1
  horizontal_mirror: true
  vertical_flip: true
  brightness: 1
  saturation: -2

The example uses QVGA (320 x 240) resolution, a maximum frame rate of 10 fps, and an idle frame rate of 0.5 fps by default. When adjusting the resolution or frame rate, change one setting at a time and confirm that the device remains stable.

3. Example

See stamp-addon-cam3660.yaml for the complete configuration. It includes the device, network, API, OTA, startup initialization, and camera settings.

1. Import the complete example into ESPHome and correct the device name as described above.
2. Follow the standard ESPHome process to configure, compile, and flash the firmware.
3. After the device connects to the network, complete discovery and setup in Home Assistant.
4. Open the device page and add the OV3660 Camera entity to the Dashboard to view the camera stream.

4. Related Links

• Stamp-AddOn Cam3660 Product Page
• Stamp-AddOn Cam3660 Complete Configuration
• early_init External Component
• ESP32 Camera Configuration Documentation
• OV3660 Datasheet