Build a web server with the ESP32-CAM board to take a photo and visualize the latest captured photo in your browser saved in SPIFFS. You can also rotate the image if necessary.

On récapitule:

• cfr #IFv-GA pour install API Arduino
• Download https://github.com/me-no-dev/ESPAsyncWebServer/archive/master.zip
• Install: Menu Sketch → Include Library → Add .ZIP Library…
• idem pour https://github.com/me-no-dev/AsyncTCP/archive/master.zip
• /!\ Board ESP32 by Espressif v3.1.0 incompatible → v3.0.7 (Menu Tools → Board → Boards Manager → Search Esp32, remove v3.1.0 and install v3.0.7)
• Code: https://github.com/RuiSantosdotme/ESP32-CAM-Arduino-IDE/blob/master/ESP32-CAM-Take-Photo-and-Display-Web-Server/ESP32-CAM-Take-Photo-and-Display-Web-Server.ino
• Contrairement à ce que le code dit, il faut sélectionner le board ESP32 Wrover Module
• Press FLASH, press RST, let RST, let FLASH
• Menu Sketch → Upload
• Press RST
• L'IP sera indiqué dans la fenêtre Sérial

Pour ajouter un flash

Ajouter les lignes suivantes:

ligne 34:

boolean flashlight = false;

ligne 57:

#define LED_BUILTIN 4

ligne 76:

<button onclick="captureWithFlashlight()">CAPTURE WITH FLASHLIGHT</button>

ligne 89:

  function captureWithFlashlight() {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', "/capturewithflashlight", true);
    xhr.send();
  }

ligne 108:

pinMode (LED_BUILTIN, OUTPUT);

ligne 182:

  server.on("/capturewithflashlight", HTTP_GET, [](http://AsyncWebServerRequest * request) {
    takeNewPhoto = true;
    flashlight = true;
    request->send(200, "text/plain", "Taking Photo");
  });

function loop devient:

  if (takeNewPhoto) {
    if (flashlight) digitalWrite(LED_BUILTIN, HIGH);
    capturePhotoSaveSpiffs();
    takeNewPhoto = false;
    if (flashlight) {
      digitalWrite(LED_BUILTIN, LOW);
      flashlight = false;
    }
  }

Install IDE Arduino pour ESP32 sous Linux Debian12

Sous Debian 12, lors du 1er test, j'ai reçu ces deux messages d'erreur:

Error Msg: ModuleNotFoundError: No module named 'serial'
Error msg: Failed uploading: no upload port provided

On va donc, d'abord:

• # apt install python3-serial
• # /sbin/usermod -aG dialout [USER] + reboot

Suivi de l'installation proprement dite :

• Download Aduino IDE: https://www.arduino.cc/en/software
• Unzip : $ unzip arduino[…]
• Launch : $ cd arduino[…], $ ./arduino-ide
• Menu File → Preferences → Additional boards manager URLs: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
• Menu Tools → Board → Board Manager… → search with ESP32, select de most recent version select the v3.0.7 version of ESP32 by Espressif Systems, and Install (la v3.1.0 est incompatible avec la carte ESP32-CAM-CH340 (cfr #CIOHWQ)
• Menu Tools → Board → Esp32 → ESP32 Dev Module
• Menu Tools → Port → /dev/ttyUSB0

Test

• Menu File → example → ESP32 → ChipID → GetChipID
• Upload: Menu Sketch → Upload
• Menu Tools → Serial Monitor
• Change to 115200 Baud

ESP32 Chip model = ESP32-D0WDQ6 Rev 101
This chip has 2 cores
Chip ID: 11493932