ESP32-Cam DIY : Homekit Camera

Arduino Sep 26, 2021

ESP32-CAM 是一片以 ESP32 為基礎的開發版，本身內建 WIFI 及藍芽 BLE 之外，再加上 OV2640 兩百萬畫素相機模組、閃光燈模組等。

ESP32-CAM 可以通過圖片或者MJPEG IP Camera的方式來介接至HomeAssistant，再利用Homebridge接入HomeKit，若您想原生接入HomeKit會比較麻煩，Github中有個解決方案，現在這里分享下如何編譯及燒錄。

本文電腦環境為macOS，若您有基本開發知識可以在其他平台編譯、刷寫，但是Apple Home App就無可避免的需要有支援的蘋果系統。

1.首先要準備好ESP-IDF開發環境

2.下載程式碼

git clone https://github.com/maximkulkin/esp32-homekit-camera.git

cd esp32-homekit-camera

更新子模塊

git submodule update --init --recursive

添加CMakeList.txt，參考Issue

3.配置
查看設備的serial阜號，執行此步驟時，可以先不用接線，後面會說明，只需要將TTL模組USB插進電腦即可執行查詢。

ls /dev/tty.*

ex. /dev/tty.usbserial-0001

開始配置

make menuconfig

如果您像我一樣，是使用VSCode + ESP-IDF 的方式建立環境，這邊可能無法順利執行"make menuconfig"。

接下來只需要終端機，暫時拋開VSCode。
進入esp-idf的安裝路徑，若你忘了，可以在VSCode中ESPRESSIF Extension查看:
Screen-Shot-2021-09-26-at-3.21.20-PM
我的路徑是在home下，所以可省略成~/

cd ~/esp/esp-idf

cd /{YOUR_PATH}/esp/esp-idf

接著執行

./install.sh

. ./export.sh

再次回到esp32-homekit-camera

cd {YOUR_PATH}/esp32-homekit-camera

打開配置窗

make menuconfig

Screen-Shot-2021-09-26-at-3.05.38-PM
依照下列資訊來配置

Serial flasher config
- Default serial port
- Flash size = 4 MB
Partition Table
- Partition Table = Custom partition table CSV
- Custom partition CSV file = partitions.csv
Component config
- Driver configuration
  - RTCIO configuration
    - Support array rtc_gpio_desc for ESP32 = check
- ESP32-specific
  - Support for external, SPI-connected RAM = check
  - SPI RAM config
    - Initialize SPI RAM during startup = check
    - SPI RAM access method = Make RAM allocatable using malloc() as well
- Camera configuration
  - OV2640 Support = check
- HomeKit
  - SPI flash address for storing HomeKit data = 0x3A0000
ESP32 HomeKit Camera
- WiFi SSID
- WiFi Password
- Select Camera Pinout
  - Select Camera Pinout = your variant of module
- LED Pin
  - PIN = your variant of module
    - ESP32-CAM by AI-Thinker == 33
- Image sensor vertical flip (optional)
  - Toggle if HomeKit app has video feed upside down
- Image sensor horizontal mirror (optional)
  - Toggle if HomeKit app has video feed mirrored
- Image sensor enhance settings (optional)
  - EXPERIMENTAL: adjusts contrast, saturation, etc for better image quality
- HomeKit Device Setup Code (optional)
- HomeKit Device Manufacturer (optional)
- HomeKit Device model name (optional)
- HomeKit Device model number (optional)
- HomeKit Device Serial number (optional)
- HomeKit Device Firmware version (optional)

4.使用USB轉TTL模組來刷寫
接線：
ESP32-Cam -------- TTL模組工具
TX -------- RX
RX -------- TX
GND -------- GND
3.3V -------- 3.3V (這邊要使用5V也可以)
GPIO0 -------- GND (開發版上電前要接好，上電後會進入刷寫模式)

擦除flash