How to Use Esp32 cam small Introduction

 Here, we will discuss how to program ESP32-CAM using Arduino UNO. I will not use any FTDI or other USB to TTL converter to program the esp32 camera module. Here I have used only ESP32CAM Arduino UNO.

Circuit of ESP32CAM Arduino

As you can see, we can easily connect the ESP32-CAM module with Arduino UNO to upload code from Arduino IDE.

ESP32CAM Arduino UNO connection:

ESP32CAM	Arduino UNO
U0T	TX
U0R	RX
5V	5V
GND	GND
GPIO-0 –> GND	Reset –> GND

Arduino IDE setup for ESP32-CAM

Before uploading the code to ESP32-CAM module, please check the following setting:

• Update the Preferences –> Aditional boards Manager URLs: https://dl.espressif.com/dl/package_esp32_index.json, http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Board Settings:
  • Board: “ESP32 Wrover Module”
  • Flash Mode: “QIO”
  • Partition Scheme: “Hue APP (3MB No OTA/1MB SPIFFS)”
  • Flash Frequency: “40MHz”
  • Upload Speed: “115200”
  • Core Debug Level: “None”
  • Programmer: “AVR ISP”

• COM Port: Depends On Your System
• GPIO 0 must be connected to GND pin while uploading the sketch
• After connecting GPIO 0 to GND pin, press ESP32 CAM on-board RESET button to put the board in the flashing mode

After uploading the code disconnect the GPIO-0 pin from GND pin.

Now to get the IP address of ESP32 camera module:

• Open Serial Monitor
• Set the Baud rate to 115200
• Press the ESP32 CAM on-board RESET button

Now you can copy the IP address and paste it to any browser to start the video streaming.

#include "esp_camera.h"

#include <WiFi.h>

//

// WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality

//            Ensure ESP32 Wrover Module or other board with PSRAM is selected

//            Partial images will be transmitted if image exceeds buffer size

//

// Select camera model

#define CAMERA_MODEL_WROVER_KIT // Has PSRAM

//#define CAMERA_MODEL_ESP_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_AI_THINKER // Has PSRAM

//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM

#include "camera_pins.h"

const char* ssid = "*********";

const char* password = "*********";

void startCameraServer();

void setup() {

  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;

  

  // if PSRAM IC present, init with UXGA resolution and higher JPEG quality

  //                      for larger pre-allocated frame buffer.

  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;

  }

#if defined(CAMERA_MODEL_ESP_EYE)

  pinMode(13, INPUT_PULLUP);

  pinMode(14, INPUT_PULLUP);

#endif

  // 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

  if (s->id.PID == OV3660_PID) {

    s->set_vflip(s, 1); // flip it back

    s->set_brightness(s, 1); // up the brightness just a bit

    s->set_saturation(s, -2); // lower the saturation

  }

  // drop down frame size for higher initial frame rate

  s->set_framesize(s, FRAMESIZE_QVGA);

#if defined(CAMERA_MODEL_M5STACK_WIDE) || defined(CAMERA_MODEL_M5STACK_ESP32CAM)

  s->set_vflip(s, 1);

  s->set_hmirror(s, 1);

#endif

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.println("WiFi connected");

  startCameraServer();

  Serial.print("Camera Ready! Use 'http://");

  Serial.print(WiFi.localIP());

  Serial.println("' to connect");

}

void loop() {

  // put your main code here, to run repeatedly:

  delay(10000);

}