ESP32 - CAM OV2640. Module. WebServer

[Juan_Antonio]

- ESP32-CAM capture image and update that image in Google Drive (II).

We are going to change the Script code, we will use part of the @TIMAI2 code to update the image that we will call capture.jpg

function doPost(e) {
  var data = Utilities.base64Decode(e.parameters.data);
// var nombreArchivo = Utilities.formatDate(new Date(), "GMT-3", "yyyyMMdd_HHmmss")+".jpg";
  var filename = "capture.jpg";
  var blob = Utilities.newBlob(data, e.parameters.mimetype, filename);
  
  var folder, folders = DriveApp.getFoldersByName("ESP32-CAM");
  if (folders.hasNext()) {
    folder = folders.next();
  } else {
    folder = DriveApp.createFolder("ESP32-CAM");
  }
  
  var existing = folder.getFilesByName(filename);
    if (existing.hasNext()) {
      var file = existing.next();
      if (file.getName() == filename) {
          fileID = file.getId();
         // Drive.Files.update({title: filename, mimeType: mimetype}, fileID, blob); 
          Drive.Files.update({title: filename,  mimeType: file.getMimeType()}, fileID, blob); 
      }
    } else {
    blob = Utilities.newBlob(data, e.parameters.mimetype, filename);
    fileID = folder.createFile(blob).getId(); 
    }
  
 // var file = folder.createFile(blob); 
  
  return ContentService.createTextOutput("Completo.")
}

• We can locate the key of the file and put it in an Image component within a Clock, every certain interval the image will be updated on the screen.

[priyankakonde]

hello sir,
my quation was by using esp 32 cam module can i controlled other 6 leds through mit app through wifi connecetivity and configuring esp32 cam as web server meanse in local area network ..... beacuse esp32 cam having 10 gpios but some are used for the camera in bulid module so can u help me in this?

[Juan_Antonio]

In this tutorial you can see the ESP32-CAM pinout:

ESP32-CAM Video Streaming and Face Recognition with Arduino IDE | Random Nerd...

The following pins are internally connected to the microSD card reader:

• GPIO 14: CLK
• GPIO 15: CMD
• GPIO 2: Data 0
• GPIO 4: Data 1 (also connected to the on-board LED)
• GPIO 12: Data 2
• GPIO 13: Data 3

but if you don't have SdCard, maybe you can use it, I haven't tried it.

These pins can be connected to a 16-Channel CD74HC4067 multiplexer module and get 16 outputs.
https://www.google.com/search?q=CD74HC4067+16-Canal&sxsrf=ALeKk02nyZymtm4jNuuL9XKUVE1jdBLBeQ:1623309859467&source=lnms&tbm=isch&sa=X&ved=2ahUKEwibo6K8xIzxAhWrzoUKHRQYATYQ_AUoAXoECAEQAw&biw=1280&bih=611

[Juan_Antonio]

- Loading the Sketch using an Arduino UNO.

• Instead of loading the Sketch through an FTDI module, we can load it with an Arduino UNO.

• But, attention, the Arduino IDE must be less than 1.8.13, if it is equal to or greater, the Programmer will not work: "No programmers available for this board"

• Set this configuration:
  

  

• In this video it is well explained:
  https://www.youtube.com/watch?v=q-KIpFIbRMk

[Juan_Antonio]

- Add a button to the web page to turn on/off LED4, flash led.

We consult the following tutorial:

Modifying the Cam32 Webserver HTML file

[Juan_Antonio]

- Another Video Streamer with the WebViewer component.

It can transmit with HTTP and RTSP.

#ifdef ENABLE_WEBSERVER
WebServer server(80);
#endif

#ifdef ENABLE_RTSPSERVER
WiFiServer rtspServer(8554);
#endif

$9 RTSP Video Streamer Using the ESP32-CAM Board

[Vhay38]

hi there, i had some question, in your esp code there is no led, and if i add a led 4 from http://kio4.com/arduino/247_Wemos_WebCam.htm#led4, when streaming the led button doesnt work, how to make the led button work when streaming?, thanks...

[Juan_Antonio]

Try with this code:

#include <esp32cam.h>
#include <WebServer.h>
#include <WiFi.h>

const char* WIFI_SSID = "my-ssid";
const char* WIFI_PASS = "my-pass";

#define LED4  4 // LED4 is a Built-in Flash LED.

WebServer server(80);

static auto loRes = esp32cam::Resolution::find(160, 120); // Cambio resolución.
static auto hiRes = esp32cam::Resolution::find(800, 600);

void handleBmp()
{
  if (!esp32cam::Camera.changeResolution(loRes)) {
    Serial.println("SET-LO-RES FAIL");
  }

  auto frame = esp32cam::capture();
  if (frame == nullptr) {
    Serial.println("CAPTURE FAIL");
    server.send(503, "", "");
    return;
  }
  Serial.printf("CAPTURE OK %dx%d %db\n", frame->getWidth(), frame->getHeight(), static_cast<int>(frame->size()));

  if (!frame->toBmp()) {
    Serial.println("CONVERT FAIL");
    server.send(503, "", "");
    return;
  }
  Serial.printf("CONVERT OK %dx%d %db\n", frame->getWidth(), frame->getHeight(), static_cast<int>(frame->size()));

  server.setContentLength(frame->size());
  server.send(200, "image/bmp");
  WiFiClient client = server.client();
  frame->writeTo(client);
}

void serveJpg()
{
  auto frame = esp32cam::capture();
  if (frame == nullptr) {
    Serial.println("CAPTURE FAIL");
    server.send(503, "", "");
    return;
  }
  Serial.printf("CAPTURE OK %dx%d %db\n", frame->getWidth(), frame->getHeight(), static_cast<int>(frame->size()));

  server.setContentLength(frame->size());
  server.send(200, "image/jpeg");
  WiFiClient client = server.client();
  frame->writeTo(client);
}

void handleJpgLo()
{
  if (!esp32cam::Camera.changeResolution(loRes)) {
    Serial.println("SET-LO-RES FAIL");
  }
  serveJpg();
}

void handleJpgHi()
{
  if (!esp32cam::Camera.changeResolution(hiRes)) {
    Serial.println("SET-HI-RES FAIL");
  }
  serveJpg();
}
////////////////// Modified. KIO4.COM
void handleJpg_on()
{
  Serial.println("LED ON");
  digitalWrite(LED4,HIGH); 
  serveJpg();
}
void handleJpg_off()
{
  Serial.println("LED OFF");
  digitalWrite(LED4,LOW); 
  serveJpg();
}
void handleMjpeg_off()
{
  handleMjpeg();
}
///////////////////////////

void handleMjpeg()
{
  if (!esp32cam::Camera.changeResolution(hiRes)) {
    Serial.println("SET-HI-RES FAIL");
  }

  Serial.println("STREAM BEGIN");
  WiFiClient client = server.client();
  auto startTime = millis();
  int res = esp32cam::Camera.streamMjpeg(client);
  if (res <= 0) {
    Serial.printf("STREAM ERROR %d\n", res);
    return;
  }
  auto duration = millis() - startTime;
  Serial.printf("STREAM END %dfrm %0.2ffps\n", res, 1000.0 * res / duration);
}

void setup()
{
  Serial.begin(115200);
  Serial.println();
  pinMode(LED4, OUTPUT);

  {
    using namespace esp32cam;
    Config cfg;
    cfg.setPins(pins::AiThinker);
    cfg.setResolution(hiRes);
    cfg.setBufferCount(2);
    cfg.setJpeg(80);

    bool ok = Camera.begin(cfg);
    Serial.println(ok ? "CAMERA OK" : "CAMERA FAIL");
  }

  WiFi.persistent(false);
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }

  Serial.print("http://");
  Serial.println(WiFi.localIP());
  Serial.println("  /cam.bmp");
  Serial.println("  /cam-lo.jpg");
  Serial.println("  /cam-hi.jpg");
  Serial.println("  /cam.mjpeg");

  server.on("/cam.bmp", handleBmp);
  server.on("/cam-lo.jpg", handleJpgLo);
  server.on("/cam-hi.jpg", handleJpgHi);
  server.on("/cam.mjpeg", handleMjpeg);
  server.on("/cam.mjpeg_off", handleMjpeg_off); // KIO4
  server.on("/LED_on", handleJpg_on); // KIO4
  server.on("/LED_off", handleJpg_off); // KIO4
  
  server.begin();
}

void loop()
{
  server.handleClient(); 
}

[Vhay38]

when streaming, the led button is not working, how to make it work while streaming?

[Juan_Antonio]

While it is streaming it cannot be changed.

[lladam]

Hi,
firstly thanks for the great job.

I tested the .aia and .ino at #18, that doesn't show any, the code serial monite output OK with:
CAMERA OK
http://192.168.100.176
/cam.bmp
/cam-lo.jpg
/cam-hi.jpg
/cam.mjpeg

and my PC shown well of image, but my phone with: p247_ESP32_Cam MIT APP shown nothing but error:
net:: ERR_CONNECTION_TIMED_OUT. (I've modified the IP)
what can be?
Thanks
Adam

[German_Skena]

Hello Juan Antonio.

I want to make a project with ESP32CAM, but i never use it.
It's for farming purposes.
My question is, i look for info about from when to when the camera record in the wave spectrum range. (i need take a photo from Visible to NIR - Near InfraRed). With 1 camera, take a capture with the visible and then, with another NIR. (i have the idea of removing the polarizing filter of the camera, i already read about it).
I will do this for a educational project in Geology.
I think to use a slider because the photo must be of the same place and in need to MERGE the 2 captures in 1. I need to rich the VISIBLE photo with NIR info, that's the idea.
But from all i searched i didn't find info about the spectrum (from 450nm to 750nm from visible, and later for the NIR , the close IR in the spectrum).
I will follower all i read in your post to make part of this project.
BUT
Do you know where to find this info (ESP32CAM spectrum of light info)?.

[Juan_Antonio]

@illias28

Does the " 3.- App Inventor. VisorWeb. Utilizamos otra librería para evitar el error" example on the "http://kio4.com/arduino/247_Wemos_WebCam.htm" page work for you?

[Juan_Antonio]

@German_Skena

The OV3660 camera is slow and low resolution, I don't think you will get quality images. You can see some examples of images on Youtube https://www.youtube.com/watch?v=KTOlRj-VKlg

You can get its characteristics in...
https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/unit/OV3660_CSP3_DS_1.3_sida.pdf

Perhaps a better option would be to use a Raspberry Pi and a USB WebCam.
http://kio4.com/raspberry/24_webcam_usb.htm

[German_Skena]

Gracias Juan Antonio.

Well. I write you in english because you replay in english (even your look like to be a spanish talker :D)
All the info you share with me, will help me a lot.
The resolution in this case is HUGE in comparison of the resolution i must to use with sat images.
I work with images, and every pixel means 30x30m.
Here the pixels means mm in any case or cm, not m.
So the resolution have scaled A LOT.

A question. If I only want to take a picture (in the IR), there is a way to be explicit to take the capture with the 750 to 1100 range?
How can i take the photo (in the visible or with the IR)?
I read the manual you share with me, and explain, about light, focus, if you chose sepia, negative. BUT never This range (IR), i think all the time is talking about Visible.

By the way, I am more curious about this cameras, do you know a camera for IR only from 700 to 2500nm.
I can solve the problem with this.... BUT, only from 700-1100.
Is only if you KNOW, i do not want to disturb you or take more time from you. I will stop asking here, because I have a lot for working with all of this.
If you are interest i can share my project but for the long explanation i think could be possible to talk outside of the forum, because this could be VERY LONG TO EXPLAIN, and could be annoying to explain it here, taking too much space from the forum .
This project is for farming. GeoInformatic's. If you are interest i can send you a mp talking about the project. I do not want to break any rule in the posting process, that's all.
Again. Thank you for all.

[Juan_Antonio]

@German_Skena
I have not used NIR cameras.

I have seen some projects on the internet but with IR Thermal cameras.

https://www.youtube.com/watch?v=k6qim96wB4k

And NIR cameras but for Windows and LINUX.

https://www.youtube.com/watch?v=3zF4D6x3m18

Here I put an informative link with an image with and without NIR.

https://www.infinitioptics.com/technology/nir-near-infrared

If you want you can send me a PM about your project.

[Ruwan_Fernando]

how to view worldwide esp32 cam ?

[Juan_Antonio]

You must enter the router configuration and link the IP and port of the ESP32 code.

How To Set Up Port Forwarding - Port Forward