前言

电源方向资料免费开源到QQ群1：280730348和QQ群2：725438563。

嵌入式方向资料免费开源到QQ群1：976387827。

博客地址edadong.com，博文同步发布在知乎、bilibili，其中bilibili主要以视频为主。对开源项目的疑惑请尽量在b站下方留言，其次在群内商讨，所有开源项目均自己设计验证过。

由于个人精力有限，以后不做免费的私聊问题回答，但B站我会做最快的响应回答，群内看到了也会回答。如果确实是想私聊问问题，5-15元一次答疑，避免太多人找我，此初衷主要是想更多人看到问题的解决方法或者开源项目这么做的意义，在B站解答大家都能看得到，私人解答就丢失了开源解答的优势了。

更详细的讲解请移步Bilibili：EDAdong。

设计目标和方案

（1）主控选用ESP32-S3，内部自带WIFI，摄像头选用OV2640；

（2）室内室外都分别有一个按键和蜂鸣器，其中按下室外的按键，室内和室外蜂鸣器都能鸣响；

（3）按下室内的按键，摄像头开启，通过手机查看图像；

（4）设置一个按键在室内，可以控制舵机完成开门动作；

（5）通过红外热释传感器检测室外是否有人，有人则室内LED灯点亮，提醒有人；

注意事项

需要事先通过ESP32自带的串口获得摄像头显示对应的网段，浏览器输入对应网段才能显示。需要链接同一个网络才可以实现显示。

原理图及实物图

代码

/**********************************************************************
  Filename    : Camera Web Server
  Description : The camera images captured by the ESP32S3 are displayed on the web page.
  Auther      : www.freenove.com
  Modification: 2022/10/31
**********************************************************************/
#include "esp_camera.h"
#include <WiFi.h>

// ===================
// Select camera model
// ===================
//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
//#define CAMERA_MODEL_ESP_EYE // Has PSRAM
#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM
//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM
//#define CAMERA_MODEL_AI_THINKER // Has PSRAM
//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
// ** Espressif Internal Boards **
//#define CAMERA_MODEL_ESP32_CAM_BOARD
//#define CAMERA_MODEL_ESP32S2_CAM_BOARD
//#define CAMERA_MODEL_ESP32S3_CAM_LCD

#include "camera_pins.h"
#include <ESP32Servo.h>//舵机库
#define camera_sw 1
#define motor_sw 2
#define doorbee_sw 42
#define beepin 41
#define beepout 40
#define duoji 39              
#define people 21 
#define ledout 47
// ===========================
// Enter your WiFi credentials
// ===========================
const char* ssid     = "SERS";
const char* password = "guodao2020";

int camerasw_status;//摄像头开关按键检测状态
int motorsw_status;//舵机开关按键检测状态
int doorbeesw_status;//门铃按键检测状态
int beep_status;//蜂鸣器状态
int duoji_status;//舵机状态
int people_status;//是否有人状态
Servo servo;                     //配置舵机函数
void servo_init(void)
{
  servo.setPeriodHertz(50);
  servo.attach(duoji,500,2500);
  servo.write(90);
  delay(500);
  Serial.println("舵机 初始化成功");
}

void startCameraServer();

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

  pinMode(camera_sw, INPUT_PULLUP);              //定义按键口为上拉输入
  pinMode(motor_sw, INPUT_PULLUP);               //定义按键口为上拉输入 
  pinMode(doorbee_sw, INPUT_PULLUP);             //定义按键口为上拉输入
  pinMode(people, INPUT_PULLDOWN);               //定义按键口为下拉输入
  pinMode(beepin, OUTPUT);                       //定义输出端口
  pinMode(ledout, OUTPUT);                       //定义输出端口
  pinMode(beepout, OUTPUT);                      //定义输出端口 

  digitalWrite(beepin, LOW);                     //定义LED为低电平熄灭
  digitalWrite(beepout, LOW);                    //定义LED为低电平熄灭
  digitalWrite(ledout, LOW);                     //定义LED为低电平熄灭
  //舵机初始化
  servo_init();  
  //摄像头初始化
  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.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(psramFound()){
    Serial.print("found psrame");
    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;
    Serial.print("not found psrame");
  }

  // 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
  s->set_vflip(s, 1); // flip it back
  s->set_brightness(s, 1); // up the brightness just a bit
  s->set_saturation(s, 0); // lower the saturation
  
  WiFi.begin(ssid, password);
  WiFi.setSleep(false);

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

void loop() {
  //按键打开摄像头
  camerasw_status = digitalRead(camera_sw);
  motorsw_status = digitalRead(motor_sw);
  people_status = digitalRead(people);   
  doorbeesw_status = digitalRead(doorbee_sw);      
  if(camerasw_status==0)
  {
    startCameraServer();
    Serial.print("Camera Ready! Use 'http://");
    Serial.print(WiFi.localIP());
    Serial.println("' to connect");
  }
  if(motorsw_status==0)
  {
    duoji_status=!duoji_status;
  }
  if(duoji_status==0)
  {
    servo.write(180);                                                                                                                        
  }
  else
  {
    servo.write(90);
  }
  if(people_status)
  {
    digitalWrite(ledout, HIGH);                     //定义LED为低电平熄灭    
  }
  else
  {
    digitalWrite(ledout, LOW);                     //定义LED为低电平熄灭 
  }
    
  if(doorbeesw_status==0)
  {
    digitalWrite(beepin, HIGH);                     //定义LED为低电平熄灭
    digitalWrite(beepout, HIGH);                    //定义LED为低电平熄灭   
  } 
  else
  {
    digitalWrite(beepin, LOW);                     //定义LED为低电平熄灭
    digitalWrite(beepout, LOW);                    //定义LED为低电平熄灭   
  }
  delay(200);
}