ESP32-CAM ——Blinker平台_esp32cam

ESP32-CAM，点灯云平台Blinker，MQTT协议，APP控制，Wifi视频监控，点灯，控制舵机。

一 环境搭建

两个宝藏网站

 点灯科技 (diandeng.tech)

软件下载 - Arduino中文社区

第一次体验Arduino

按照上面教程安装ESP32固件包

语言改为中文

二 常用基本语法 

学过stm32再看Arduino代码，有种看少儿编程的感觉哈哈哈 

串口println

用串口连接电脑，5V

RX-UoT

TX-UnR

IO0 需要连接 GND

工具=》选择开发板=》esp32=》AIThinker ESP32-CAM

下面代码为设置波特率

setup 可以理解为 main 函数 while(1) 之前

loop 理解为 while(1) 里

loop内循环打印字符串， 

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}
 
void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("hello world");
}

选择端口，点击上传即可

一直显示Connecting就按一下reset 

上传完毕，IO0 断开 GND，按下RESET，打开串口监视器，可看见循环打印字符串

点个灯

由图可知GPIO4对应LED 

文件=》例程

提供了很多模板，一看就懂

int led = 4;
 
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(led, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() {
  digitalWrite(led, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(led, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
}

舵机控制

GPIO12输出PWM

#define ServoPin 12
 
void Myservo(int angle)
{
  for (int i = 0; i < 5; i++) {
    int pulsewidth = (angle * 11) + 500;        //将角度转化为500-2480的脉宽值
    digitalWrite(ServoPin, HIGH);               //将舵机接口电平至高
    delayMicroseconds(pulsewidth);              //延时脉宽值的微秒数
    digitalWrite(ServoPin, LOW);                //将舵机接口电平至低
    delayMicroseconds(20000 - pulsewidth);      //延时脉宽值的微秒数
  }
  delay(10);
}
 
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(ServoPin, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() {
  Myservo(0);
  delay(1000);                      // wait for a second
  Myservo(45);
  delay(1000);                      // wait for a second
  Myservo(90);
  delay(1000);                      // wait for a second
  Myservo(135);
  delay(1000);                      // wait for a second
  Myservo(180);
  delay(1000);                      // wait for a second
}

超声波测距

最后加了个if，软件过滤掉误差

#define Echo 13
#define Trag 15
 
long gettime()
{
  digitalWrite(Trag,HIGH);
  delayMicroseconds(10);
  digitalWrite(Trag,LOW);
 
  return pulseIn(Echo,HIGH);
}
 
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(Echo, INPUT);
  pinMode(Trag, OUTPUT);
  Serial.begin(115200);
}
 
// the loop function runs over and over again forever
void loop() {
  long dis = gettime()/58;
  if(dis > 2) Serial.println(dis);
}

三 摄像头使用

前面都是小卡拉米，正戏这里开始。

先嫖个示例 

改为使用 AI_THINKER ，Wifi名密码改成自己的手机热点

// ===================
// 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
//#define CAMERA_MODEL_XIAO_ESP32S3 // Has 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"
 
// ===========================
// Enter your WiFi credentials
// ===========================
const char* ssid = "IQOO 5";
const char* password = "88888888";

clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:10944
load:0x40080400,len:6388
entry 0x400806b4
E (79) psram: PSRAM ID read error: 0xffffffff
 
.......
WiFi connected
Starting web server on port: '80'
Starting stream server on port: '81'
Camera Ready! Use 'http://192.168.100.9' to connect

电脑和cam都连接上手机热点，烧录完成后，访问串口提供的网址 

四 使用Blinker云平台

监控视频传输

下载点灯科技云平台APP，注册，添加设备，选择网络设备，可以得到一个“密钥”

例程选择最下面的 Blinker 里的 Blinker_ESP32_CAM。

“密钥”、Wifi和密码，填入程序, Blinker.begin()入参“密钥”、Wifi和密码

#define BLINKER_WIFI
//#define BLINKER_ESP_SMARTCONFIG
 
#include <Blinker.h>
#include "ESP32_CAM_SERVER.h"
 
//blinker提供的密钥，WiFi名密码
char auth[] = "8578f8f1626f";
char ssid[] = "iQOO 5";
char pswd[] = "88888888";
//默认摄像头不开启
bool setup_camera = false;
//反馈设备状态
void dataRead(const String & data)
{
    BLINKER_LOG("Blinker readString: ", data);
 
    Blinker.vibrate();//按下APP按键产生震动
    
    uint32_t BlinkerTime = millis();
    
    Blinker.print("millis", BlinkerTime);
}
 
void setup()
{
    Serial.begin(115200);//串口使得能
    BLINKER_DEBUG.stream(Serial);//blinker串口debug
 
    pinMode(LED_BUILTIN, OUTPUT);
    digitalWrite(LED_BUILTIN, LOW);
    
    Blinker.begin(auth,ssid,pswd);//通过WiFi账号密码连接平台
    Blinker.attachData(dataRead);//反馈设备状态
}
 
void loop()
{
    Blinker.run();//blinker运行 包括连接blinker云 MQTT协议
    //判断设备是否正常执行 正常就输入ip地址
    if (Blinker.connected() && !setup_camera)
    {
        setupCamera();
        setup_camera = true;
 
        Blinker.printObject("video", "{\"str\":\"mjpg\",\"url\":\"http://"+ WiFi.localIP().toString() + "\"}");
    }
}

编译出错         exit status 1        就把Blinker库卸载重新导入，去除原zip名里的防重“(1)”这种

APP添加一个“视频”，mjpg，输入获得的网址

[2786] WiFi Connected.
[2786] IP Address: 
[2786] 192.168.100.9
[4410] Freeheap: 177596
[4414] mDNS responder started
[4417] webSocket_MQTT server started
[4417] ws://DAFE7962GYXI01DUHFFY724S.local:81

MQTT控灯

官网找到按钮示例 

 点灯科技 (diandeng.tech)

 添加一个按钮控制GPIO输出，实现开灯关灯

 
#define BLINKER_WIFI
//#define BLINKER_ESP_SMARTCONFIG
 
#define led 4
 
#include <Blinker.h>
#include "ESP32_CAM_SERVER.h"
 
// 新建组件对象
BlinkerButton Button1("led");
 
// 按下按键即会执行该函数
void button1_callback(const String & state) {
    BLINKER_LOG("get button state: ", state);
    digitalWrite(led, !digitalRead(led));
}
 
//blinker提供的密钥，WiFi名密码
char auth[] = "8578f8f1626f";
char ssid[] = "iQOO 5";
char pswd[] = "88888888";
//默认摄像头不开启
bool setup_camera = false;
//反馈设备状态
void dataRead(const String & data)
{
    BLINKER_LOG("Blinker readString: ", data);
 
    Blinker.vibrate();//按下APP按键产生震动
    
    uint32_t BlinkerTime = millis();
    
    Blinker.print("millis", BlinkerTime);
}
 
void setup()
{
    Serial.begin(115200);//串口使得能
    BLINKER_DEBUG.stream(Serial);//blinker串口debug
    
    pinMode(led, OUTPUT);
    digitalWrite(led, LOW);
    
    Blinker.begin(auth,ssid,pswd);//通过WiFi账号密码连接平台
    Blinker.attachData(dataRead);//反馈设备状态
    Button1.attach(button1_callback);//关联处理按钮函数
}

添加按钮和监视器，按钮内容改为led与代码一致 

 

MQTT控制舵机

一个最大值为180的滑块。 

 

 完整代码

#define BLINKER_WIFI
//#define BLINKER_ESP_SMARTCONFIG
 
#define led 4
#define ServoPin 12          //控制舵机
 
#include <Blinker.h>
#include "ESP32_CAM_SERVER.h"
 
// 新建组件对象
BlinkerButton Button1("led");
// 新建组件对象
BlinkerSlider Slider0("duoji");   //位置0-3 滑块 数据键名  舵机范围0-180
 
//舵机控制代码
void Myservo(int angle)
{
  for (int i = 0; i < 5; i++) {
    int pulsewidth = (angle * 11) + 500;        //将角度转化为500-2480的脉宽值
    digitalWrite(ServoPin, HIGH);               //将舵机接口电平至高
    delayMicroseconds(pulsewidth);              //延时脉宽值的微秒数
    digitalWrite(ServoPin, LOW);                //将舵机接口电平至低
    delayMicroseconds(20000 - pulsewidth);      //延时脉宽值的微秒数
  }
  delay(10);
}
 
//滑块任务函数
void slider0_callback(int32_t value) //滑块0
{
    int servo=value;
    Myservo(servo);//转动角度}
}
 
// 按下按键即会执行该函数
void button1_callback(const String & state) {
    BLINKER_LOG("get button state: ", state);
    digitalWrite(led, !digitalRead(led));
}
 
//blinker提供的密钥，WiFi名密码
char auth[] = "8578f8f1626f";
char ssid[] = "iQOO 5";
char pswd[] = "88888888";
//默认摄像头不开启
bool setup_camera = false;
//反馈设备状态
void dataRead(const String & data)
{
    BLINKER_LOG("Blinker readString: ", data);
 
    Blinker.vibrate();//按下APP按键产生震动
    
    uint32_t BlinkerTime = millis();
    
    Blinker.print("millis", BlinkerTime);
}
 
 
void setup()
{
    Serial.begin(115200);//串口使得能
    BLINKER_DEBUG.stream(Serial);//blinker串口debug
    
    pinMode(led, OUTPUT);
    digitalWrite(led, LOW);
 
    pinMode(ServoPin, OUTPUT);
    digitalWrite(ServoPin, LOW);
 
    Blinker.begin(auth,ssid,pswd);//通过WiFi账号密码连接平台
    Blinker.attachData(dataRead);//反馈设备状态
    Button1.attach(button1_callback);//关联处理按钮函数
    Slider0.attach(slider0_callback);//关联滑动开关
 
}
 
void loop()
{
    Blinker.run();//blinker运行 包括连接blinker云 MQTT协议
    //判断设备是否正常执行 正常就输入ip地址
    if (Blinker.connected() && !setup_camera)
    {
        setupCamera();
        setup_camera = true;
 
        Blinker.printObject("video", "{\"str\":\"mjpg\",\"url\":\"http://"+ WiFi.localIP().toString() + "\"}");
    }
}