15. Camera

Schematic Download

Download it from Arduino -> Camera in the Documentation Tutorial section of the Baidu Netdisk link in the Download Center.

To use this example, place the two additional files app_httpd.cpp and camera_index.h in the same folder to form the project folder. Otherwise, compilation errors will occur. After downloading, check the initialization status through a serial assistant. When an IP address appears, the program is running successfully.

Connect a computer or mobile phone to the configured hotspot, then enter the IP address shown above in a browser to open the camera control page. Click the Start Stream button on the camera control page to start Wi-Fi camera transmission.

camera.ino

#include "esp_camera.h"
#include <WiFi.h>

// Related pin settings
#define PWDN_GPIO_NUM -1// Not connected
#define RESET_GPIO_NUM -1// Not connected
#define XCLK_GPIO_NUM 39
#define SIOD_GPIO_NUM 21
#define SIOC_GPIO_NUM 1

#define Y9_GPIO_NUM 40
#define Y8_GPIO_NUM 38
#define Y7_GPIO_NUM 10
#define Y6_GPIO_NUM 12
#define Y5_GPIO_NUM 7
#define Y4_GPIO_NUM 48
#define Y3_GPIO_NUM 47
#define Y2_GPIO_NUM 6
#define VSYNC_GPIO_NUM 42
#define HREF_GPIO_NUM 41
#define PCLK_GPIO_NUM 11

// Flash LED -- not used
#define LED_GPIO_NUM 22

// ===========================
// Set the Wi-Fi name and password that the development board will connect to
// ===========================
const char* ssid = "lckfb";
const char* password = "12345678";

// Related function calls -- from app_httpd.cpp
void startCameraServer();
void setupLedFlash(int pin);

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

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.frame_size = FRAMESIZE_UXGA;
config.pixel_format = PIXFORMAT_JPEG; // for streaming
//config.pixel_format = PIXFORMAT_RGB565; // for face detection/recognition
config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;
config.fb_location = CAMERA_FB_IN_PSRAM;
config.jpeg_quality = 12;
config.fb_count = 1;

// if PSRAM IC present, init with UXGA resolution and higher JPEG quality
// for larger pre-allocated frame buffer.
if(config.pixel_format == PIXFORMAT_JPEG){
if(psramFound()){
config.jpeg_quality = 10;
config.fb_count = 2;
config.grab_mode = CAMERA_GRAB_LATEST;
} else {
// Limit the frame size when PSRAM is not available
config.frame_size = FRAMESIZE_SVGA;
config.fb_location = CAMERA_FB_IN_DRAM;
}
} else {
// Best option for face detection/recognition
config.frame_size = FRAMESIZE_240X240;
config.fb_count = 2;

}

// 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;
}

sensor_t * s = esp_camera_sensor_get();
// initial sensors are flipped vertically and colors are a bit saturated
if (s->id.PID == OV3660_PID) {
s->set_vflip(s, 1); // flip it back
s->set_brightness(s, 1); // up the brightness just a bit
s->set_saturation(s, -2); // lower the saturation
}
// drop down frame size for higher initial frame rate
if(config.pixel_format == PIXFORMAT_JPEG){
s->set_framesize(s, FRAMESIZE_QVGA);
}

s->set_vflip(s, 1);

// Setup LED FLash if LED pin is defined in camera_pins.h
#if defined(LED_GPIO_NUM)
setupLedFlash(LED_GPIO_NUM);
#endif

WiFi.begin(ssid, password);
WiFi.setSleep(false);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");

startCameraServer();

Serial.print("Camera Ready! Use 'http://");
Serial.print(WiFi.localIP());
Serial.println("' to connect");
}

void loop() {
// Do nothing. Everything is done in another task by the web server
delay(10000);
}

File Download

Download app_httpd.cpp from Arduino -> Camera in the Documentation Tutorial section of the Baidu Netdisk link in the Download Center.

Download camera_index.h from Arduino -> Camera in the Documentation Tutorial section of the Baidu Netdisk link in the Download Center.