ESP32-CAM摄像头使用教程
ESP32-CAM摄像头使用教程
话说ESP32-CAM有多少人在用呢?这种东西,虽然说扩展性很强,但是程序是真不太好写。虽然
说能联网,能拍照,但是引脚也太少了。
那么回归主题。
一、ESP32-CAM介绍
1.概述
ESP32-CAM是安信可最新发布小尺寸的摄像头模组。该模块可以作为最小系统独立工作,尺寸仅为2740.54.5mm,深度睡眠电流最低达到6mA。
ESP32-CAM可广泛应用于各种物联网场合,适用于家庭智能设备、工业无线控制、无线监控、QR无线识别,无线定位系统信号以及其它物联网应用,是物联网应用的理想解决方案。
ESP32-CAM采用DIP封装,直接插上底板即可使用,实现产品的快速生产,为客户提供高可靠性的连接方式,方便应用于各种物联网硬件终端场合。
体积超小的802.11b/g/n Wi-Fi + BT/BLE SoC模块
2.产品特性
采用低功耗双核32位CPU,可作应用处理器
主频高达240MHz,运算能力高达 600 DMIPS
内置 520 KB SRAM,外置8MB PSRAM
支持UART/SPI/I2C/PWM/ADC/DAC等接口
支持OV2640和OV7670摄像头,内置闪光灯
支持图片WiFI上传
支持TF卡
支持多种休眠模式。
内嵌Lwip和FreeRTOS
支持 STA/AP/STA+AP 工作模式
支持 Smart Config/AirKiss 一键配网
支持二次开发
3.应用场景
家庭智能设备图传
无线监控
智慧农业
QR无线识别
4.管脚定义
5.注意
1.请保证模块输入电源至少5V 2A,否则图片会有几率出现水纹。
2.ESP32 GPIO32管脚控制摄像头电源,当摄像头工作时,请把GPIO32拉低。
3.由于IO0连接摄像头XCLK,使用时请把IO0悬空,请勿接高低电平。
4.出厂已含有默认固件,不另外提供下载,如需重烧其他固件请谨慎操作。
二、ESP32-CAM代码
1.Arduino IDE代码
#include <WiFi.h>
void WiFiStationConnected(WiFiEvent_t event, WiFiEventInfo_t info){
digitalWrite(33,LOW);
}
void WiFiStationDisconnected(WiFiEvent_t event, WiFiEventInfo_t info){
digitalWrite(33,HIGH);
}
#include "esp_camera.h"
#include <WiFi.h>
#include "esp_timer.h"
#include "img_converters.h"
#include <Arduino.h>
#include "fb_gfx.h"
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "dl_lib.h"
#include "esp_http_server.h"
const char*wif_ssid = "wifi_ssid";
const char*wif_password = "wifi_pass";
#define PART_BOUNDARY "123456789000000000000987654321"
#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
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 stream_httpd = NULL;
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 = stream_handler,
.user_ctx = NULL
};
if (httpd_start(&stream_httpd, &config) == ESP_OK) {
httpd_register_uri_handler(stream_httpd, &index_uri);
}
}
void setup(){
pinMode(33, OUTPUT);
WiFi.onEvent(WiFiStationConnected, WiFiEvent_t::ARDUINO_EVENT_WIFI_STA_CONNECTED);
WiFi.onEvent(WiFiStationDisconnected, WiFiEvent_t::ARDUINO_EVENT_WIFI_STA_DISCONNECTED);
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);
Serial.begin(115200);
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;
if(psramFound()){
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
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;
}
WiFi.begin(wif_ssid,wif_password);
while (WiFi.status() != WL_CONNECTED){
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.print("Camera Stream Ready! Go to: http://");
Serial.print(WiFi.localIP());
Serial.println("");
startCameraServer();
}
2.Mixly代码
三、使用方法(上传代码后)
1.打开串口监视器,选择正确的串口后按下ESP32-CAM的RST按钮。(板载红色LED亮起表示网络连接成功,灭则相反)
2.串口会打印出一个IP地址,(如果没打印出来的话,是连接网络失败了。)用游览器打开。
3.打开后就可以看到视频流了。