ESP32-CAM+OLED

OLED引脚使用IIC协议：

• SCL：PIN14
• SDA：PIN15

#include 
#include "esp_http_server.h"
#include "esp_camera.h"
#include "SSD1306.h"

SSD1306 display(0x3c, 15, 14);

const char* ssid = "wxy2018";
const char* password = "wxy168168";

#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

#define PART_BOUNDARY "123456789000000000000987654321"
static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";

httpd_handle_t stream_httpd = NULL;
httpd_handle_t camera_httpd = NULL;

static esp_err_t stream_handler(httpd_req_t *req){
    camera_fb_t * fb = NULL;
    esp_err_t res = ESP_OK;
    size_t _jpg_buf_len = 0;
    uint8_t * _jpg_buf = NULL;
    char * part_buf[64];

    res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
    if(res != ESP_OK){
        return res;
    }
    
    sensor_t * s = esp_camera_sensor_get();
    s->set_vflip(s, 1);
    s->set_framesize(s, FRAMESIZE_VGA);    
    s->set_quality(s, 10);
    while(true){
        fb = esp_camera_fb_get();
        if (!fb) {
            Serial.println("Camera capture failed");
            res = ESP_FAIL;
        } else {
            _jpg_buf_len = fb->len;
            _jpg_buf = fb->buf; 
        }
        if(res == ESP_OK){
            size_t hlen = snprintf((char *)part_buf, 64, _STREAM_PART, _jpg_buf_len);
            res = httpd_resp_send_chunk(req, (const char *)part_buf, hlen);
        }
        if(res == ESP_OK){
            res = httpd_resp_send_chunk(req, (const char *)_jpg_buf, _jpg_buf_len);
        }
        if(res == ESP_OK){
            res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
        }
        if(fb){
            esp_camera_fb_return(fb);
            fb = NULL;
            _jpg_buf = NULL;
        } else if(_jpg_buf){
            free(_jpg_buf);
            _jpg_buf = NULL;
        }
        if(res != ESP_OK){
            break;
        }
    }
    return res;
}

void start_camera_server(void)
{
    httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  
    httpd_uri_t    stream_uri = {
      .uri         = "/stream",
      .method      = HTTP_GET,
      .handler     = stream_handler,
      .user_ctx    = NULL
    };
    
      config.server_port += 1;
      config.ctrl_port += 1;
      Serial.printf("Starting stream server on port: '%d'/stream\n", config.server_port);
      if (httpd_start(&stream_httpd, &config) == ESP_OK) {
          httpd_register_uri_handler(stream_httpd, &stream_uri);
      }
}


void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();
  
  display.init();

  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;
  
    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;
    }
  
    // camera init
    esp_err_t err = esp_camera_init(&config);
    if (err != ESP_OK) {
      Serial.printf("Camera init failed with error 0x%x", err);
      return;
    }
  
    //drop down frame size for higher initial frame rate
    sensor_t * s = esp_camera_sensor_get();
    s->set_framesize(s, FRAMESIZE_QVGA);
  
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
    }
    Serial.println("");
    Serial.println("WiFi connected");
  
    start_camera_server();
  
    Serial.print("Camera Ready! Use 'http://");
    Serial.print(WiFi.localIP());
    Serial.println(":81/stream' to connect");

  display.setFont(ArialMT_Plain_24);
  display.drawString(0, 0, "Hello World");
  display.display();
}

void loop() {
 delay(10);
}