code.ino

#include "esp_camera.h"
#include <WiFi.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// --- Wi-Fi Credentials ---
const char* ssid = "Network Name";
const char* password = "Network Password";

// --- OLED Display Settings ---
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define I2C_SDA 14
#define I2C_SCL 15
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// --- Camera Model (AI-Thinker) ---
#define PWDN_GPIO_NUM     32
#define RESET_GPIO_NUM    -1
#define XCLK_GPIO_NUM      0
#define SIOD_GPIO_NUM     26
#define SIOC_GPIO_NUM     27
#define Y9_GPIO_NUM       35
#define Y8_GPIO_NUM       34
#define Y7_GPIO_NUM       39
#define Y6_GPIO_NUM       36
#define Y5_GPIO_NUM       21
#define Y4_GPIO_NUM       19
#define Y3_GPIO_NUM       18
#define Y2_GPIO_NUM        5
#define VSYNC_GPIO_NUM    25
#define HREF_GPIO_NUM     23
#define PCLK_GPIO_NUM     22

void startCameraServer(); // Forward declaration of the standard camera server function

void setup() {
  Serial.begin(115200);
  
  // 1. Initialize OLED
  Wire.begin(I2C_SDA, I2C_SCL);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // 0x3C is the standard I2C address for 0.96" OLEDs
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.println("ESP32-CAM Booting...");
  display.display();

  // 2. Initialize Camera
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = Y2_GPIO_NUM;
  config.pin_d1 = Y3_GPIO_NUM;
  config.pin_d2 = Y4_GPIO_NUM;
  config.pin_d3 = Y5_GPIO_NUM;
  config.pin_d4 = Y6_GPIO_NUM;
  config.pin_d5 = Y7_GPIO_NUM;
  config.pin_d6 = Y8_GPIO_NUM;
  config.pin_d7 = Y9_GPIO_NUM;
  config.pin_xclk = XCLK_GPIO_NUM;
  config.pin_pclk = PCLK_GPIO_NUM;
  config.pin_vsync = VSYNC_GPIO_NUM;
  config.pin_href = HREF_GPIO_NUM;
  config.pin_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  
  // Init with high specs to pre-allocate larger buffers
  if(psramFound()){
    config.frame_size = FRAMESIZE_UXGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    display.println("Camera Init Failed");
    display.display();
    return;
  }

  // 3. Connect to Wi-Fi
  display.println("Connecting to Wi-Fi:");
  display.println(ssid);
  display.display();
  
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  // 4. Start standard Camera Web Server
  startCameraServer();

  // 5. Update OLED with IP Address
  display.clearDisplay();
  display.setCursor(0,0);
  display.setTextSize(2);
  display.println("ONLINE");
  display.setTextSize(1);
  display.println("");
  display.println("Stream URL:");
  display.println(WiFi.localIP());
  display.display();
}

void loop() {
  // Everything is handled by the asynchronous web server
  delay(10000); 
}

// NOTE: To make this code compile, you need to go to File > Examples > ESP32 > Camera > CameraWebServer.
// Copy the "app_httpd.cpp" file from that example into the folder where you save this sketch.