Code: Untitled.cpp Select all
#include "esp_camera.h"
#include <WiFi.h>
#include "esp_timer.h"
#include "img_converters.h"
#include "Arduino.h"
#include "SPI.h"
#include "fb_gfx.h"
#include "soc/soc.h" //--> disable brownout problems
#include "soc/rtc_cntl_reg.h" //--> disable brownout problems
#include "esp_http_server.h"
#define 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
const char *ssid = "*********";
const char *password = "********";
#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 index_httpd = NULL;
httpd_handle_t stream_httpd = NULL;
static const char PROGMEM INDEX_HTML[] = R"rawliteral(
<html>
<head>
<title>ESP32-CAM</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
font-family: Arial;
text-align: center;
margin: 0px auto;
padding-top: 30px;
}
/* ----------------------------------- Stream and Capture Viewer
img {
width: auto;
max-width: 100%;
height: auto;
}
----------------------------------- */
</style>
</head>
<body>
<h3>ESP32-CAM</h3>
<img src="" id="photo">
<script>
/* ----------------------------------- Calls the video stream link and displays it */
window.onload = document.getElementById("photo").src = window.location.href.slice(0, -1) + ":81/stream";
</script>
</body>
</html>
)rawliteral";
static esp_err_t index_handler(httpd_req_t *req)
{
httpd_resp_set_type(req, "text/html");
return httpd_resp_send(req, (const char *)INDEX_HTML, strlen(INDEX_HTML));
}
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;
}
while (true)
{
fb = esp_camera_fb_get();
if (!fb)
{
Serial.println("Camera capture failed");
res = ESP_FAIL;
}
else
{
if (fb->width > 400)
{
if (fb->format != PIXFORMAT_JPEG)
{
bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
esp_camera_fb_return(fb);
fb = NULL;
if (!jpeg_converted)
{
Serial.println("JPEG compression 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 startCameraServer()
{
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.server_port = 80;
httpd_uri_t index_uri = {
.uri = "/",
.method = HTTP_GET,
.handler = index_handler,
.user_ctx = NULL};
httpd_uri_t stream_uri = {
.uri = "/stream",
.method = HTTP_GET,
.handler = stream_handler,
.user_ctx = NULL};
if (httpd_start(&index_httpd, &config) == ESP_OK)
{
httpd_register_uri_handler(index_httpd, &index_uri);
}
config.server_port += 1;
config.ctrl_port += 1;
if (httpd_start(&stream_httpd, &config) == ESP_OK)
{
httpd_register_uri_handler(stream_httpd, &stream_uri);
}
Serial.println();
Serial.println("Camera Server started successfully");
Serial.print("Camera Stream Ready! Go to: http://");
Serial.print(WiFi.localIP());
Serial.println();
}
void setup()
{
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //--> disable brownout detector
Serial.begin(115200);
Serial.println();
delay(1000);
Serial.setDebugOutput(false);
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;
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)
{
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
delay(1000);
pinMode(33, OUTPUT); //--> RED LED on Board
Serial.println();
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED)
{
digitalWrite(33, HIGH);
delay(250);
digitalWrite(33, LOW);
delay(250);
Serial.print(".");
}
digitalWrite(4, LOW);
delay(1000);
Serial.println("");
Serial.println("WiFi connected");
startCameraServer(); //--> Start camera web server
}
void loop()
{
delay(1);
}can someone explain this to me