引言：
ESP32系列模块由于可以用ESP32来进行编程，因此广受欢迎。而ESP32 CAM模块由于经济小巧并自带摄像头而更为创客们所青睐。今天给大家介绍一个互动性强的ESP32 CAM游戏，用ESP32 CAM来做一款摄像头小车，带LED灯光控制和伺服电机控制。当然稍加改动，就可以做出许多更实用的项目
第一步：展示内容
打开摄像头，获取静态照片，获取流视频，小车的前进，后退和左右转弯。LED的灯光开闭，伺服电机的控制等
第二步：IP地址的获取
ESP32模块的IP地址是通过手机上下载的Fing软件获取的。
第三步：硬件搭建
所需器材：
（1）ESP32-CAM控制器 快速购买
（2）小车底盘
（3）电机驱动
（4）电源转接头
（5）USB数据线
（6）DF的电源模块，
（7）5v2A移动电源。
第四步：了解一下ESP32-CAM的连线和烧录
ESP32-CAM的烧录需要FTDI模块的帮助，然后安装支持文件和进行相关的板子的设置。
第五步：
发一些硬件的图片。让人有个直观的认识
DF的电源模块
5v2A移动电源，必须是用2A来驱动，否则无法工作
电机驱动的型号不详，某宝里买的-MX1508-2路直流电机驱动模块 正反转 PWM调速 双H桥步进电机迷你超L298N
小车底盘是自己改装的
第六步：总体介绍
摄像头小车的设计系统是由ESP32-cam，电机驱动和电源模块来完成的。可以实现小车的前进，后退，左转和右转。开灯，打开伺服等动作，操控起来没有迟滞感，流视频也很流畅。
第七部：连线图
第八部：代码部分的设计
代码部分的WIFI密码等要填你自己的信息
这个代码是主文件，其它几个支持文件是从样例里直接拷贝的。上图手写ok字样那张上面有支持文件的名称。
/@@*
This sketch is made by gada888
2020-7-27
*/
const char* ssid = "xxxxx";
const char* password = "xxxxx";
#include "esp_camera.h"
#include <wifi.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
// WARNING!!! Make sure that you have either selected ESP32 Wrover Module,
// or another board which has PSRAM enabled
//CAMERA_MODEL_<a class="decoration-color" href="https://www.icxbk.com/search.html?type=article&page=1&keywords=AI" target="_blank">AI</a>_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();
void setup() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);
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.pixel_format = PIXFORMAT_JPEG;
//init with high specs to pre-allocate larger buffers
if(psramFound()){
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10; //0-63 lower number means higher quality
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
config.jpeg_quality = 12; //0-63 lower number means higher quality
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);
delay(1000);
ESP.restart();
}
//drop down frame size for higher initial frame rate
sensor_t * s = esp_camera_sensor_get();
s->set_framesize(s, FRAMESIZE_QVGA); // UXGA|SXGA|XGA|SVGA|VGA|CIF|QVGA|HQVGA|QQVGA
//Servo
ledcAttachPin(2, 3);
ledcSetup(3, 50, 16);
ledcWrite(3, 4850);
//Flash
ledcAttachPin(4, 4);
ledcSetup(4, 5000, 8);
//Wheel
ledcAttachPin(12, 5); //You can adjust the speed of the wheel. (gpio12, gpio13)
ledcSetup(5, 5000, 8);
ledcAttachPin(13, 6);
ledcSetup(6, 5000, 8);
ledcWrite(6, 0);
pinMode(15, OUTPUT); //If I output PWM to GPIO 15 using ledcWrite, it will lose control. Why?
pinMode(14, OUTPUT);
Serial.println("ssid: " + (String)ssid);
Serial.println("password: " + (String)password);
WiFi.begin(ssid, password);
long int StartTime=millis();
while (WiFi.status() != WL_CONNECTED) {
delay(500);
if ((StartTime+10000) < millis()) break;
}
startCameraServer();
char* apssid = "ESP32-CAM";
char* appassword = "12345678"; //AP password require at least 8 characters.
Serial.println("");
Serial.println("WiFi connected");
Serial.print("Camera Ready! Use 'http://");
if (WiFi.status() == WL_CONNECTED) {
Serial.print(WiFi.localIP());
Serial.println("' to connect");
WiFi.softAP((WiFi.localIP().toString()+"_"+(String)apssid).c_str(), appassword);
for (int i=0;i<5;i++) {
ledcWrite(4,10);
delay(200);
ledcWrite(4,0);
delay(200);
}
}
else {
Serial.print(WiFi.softAPIP());
Serial.println("' to connect");
WiFi.softAP((WiFi.softAPIP().toString()+"_"+(String)apssid).c_str(), appassword);
for (int i=0;i<2;i++) {
ledcWrite(4,10);
delay(1000);
ledcWrite(4,0);
delay(1000);
}
}
}
void loop() {
// put your main code here, to run repeatedly:
delay(10000);
}
代码烧录完后，在手机上打开浏览器，在地址栏输入你在Fing软件里看到的ESP32的IP地址，之后便可以看到你想看的html页面了。
