Die Boards mit den USB-Adaptern sind angekommen. Allerdings musste ich feststellen, dass es nicht der CH341-USB-Chip, sondern der CP210x-Chip ist. Ich dachte schon, das Board oder der USB-zu-Serial-Controller sei defekt, bis ich auf verschiedene Kombinationen aus Drücken der Reset- oder anderer Knöpfe am Board oder Controller stieß – die allerdings allesamt nicht funktionierten.
Nachdem ich mir dann aber die Info mit dem IOB-Bridge-Button noch einmal ins Gedächtnis rief – nämlich dass beim Upload des Sketches die Brücke geschlossen und beim Starten dann geöffnet werden muss –, kombinierte ich diese Erkenntnis mit den Informationen aus dem Forum/Netz folgendermaßen:
Wenn der Sketch-Upload beginnt, muss der IOB-Kontakt/Button geschlossen bzw. gedrückt und gehalten werden. Gleichzeitig muss nach dem Schließen/Drücken/Halten der IOB-Brücke am USB-zu-Serial-Controller das ESP32-Board durch Drücken des Reset-Buttons (nicht der Reset Button des USB-zu-Serial Adapters) neu gestartet werden. Sprich: IOB-Button drücken und halten, dann Reset-Button am ESP-Board drücken – und das Ganze, während die "Connecting"-Statusmeldung im IDE-Interface erscheint. Nach dem Upload muss das Board dann per Restbutton oder Trennen der Stromversorgung neu gestartet werden. Da muss man erst mal drauf kommen.
Mit dem CH341-USB-zu-Serial-Adapter war das nicht nötig. Die Sketches können ohne weiteres Drücken hochgeladen werden, das Board bootet nach dem Upload automatisch neu – und fertig.
Demovideo : https://www.youtube.com/watch?v=i9vrU-PSxQo
#include "esp_camera.h"
#include <WiFi.h>
// preconfiguration => Line 141 anf following
//
// 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
//
// You must select partition scheme from the board menu that has at least 3MB APP space.
// Face Recognition is DISABLED for ESP32 and ESP32-S2, because it takes up from 15
// seconds to process single frame. Face Detection is ENABLED if PSRAM is enabled as well
// ===================
// 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_M5STACK_CAMS3_UNIT // Has 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
//#define CAMERA_MODEL_DFRobot_FireBeetle2_ESP32S3 // Has PSRAM
//#define CAMERA_MODEL_DFRobot_Romeo_ESP32S3 // Has PSRAM
#include "camera_pins.h"
// ===========================
// Enter your WiFi credentials
// ===========================
const char *ssid = "WLAN SSID";
const char *password = "WLAN PASSWORD";
void checkWiFiConnection() {
if (WiFi.status() != WL_CONNECTED) {
Serial.println("WiFi connection lost! Attempting reconnect...");
WiFi.disconnect();
WiFi.reconnect();
unsigned long startAttemptTime = millis();
while (WiFi.status() != WL_CONNECTED && millis() - startAttemptTime < 10000) {
delay(500);
Serial.print(".");
}
if (WiFi.status() == WL_CONNECTED) {
Serial.println("\nWiFi reconnected successfully!");
} else {
Serial.println("\nWiFi reconnect failed.");
}
}
}
void startCameraServer();
void setupLedFlash(int pin);
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_sccb_sda = SIOD_GPIO_NUM;
config.pin_sccb_scl = SIOC_GPIO_NUM;
config.pin_pwdn = PWDN_GPIO_NUM;
config.pin_reset = RESET_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.frame_size = FRAMESIZE_UXGA;
config.pixel_format = PIXFORMAT_JPEG; // for streaming ORIGINAL
//config.pixel_format = PIXFORMAT_RGB565; // for face detection/recognition
config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;
config.fb_location = CAMERA_FB_IN_PSRAM;
config.jpeg_quality = 12;
config.fb_count = 1;
// if PSRAM IC present, init with UXGA resolution and higher JPEG quality
// for larger pre-allocated frame buffer.
if (config.pixel_format == PIXFORMAT_JPEG) {
if (psramFound()) {
config.jpeg_quality = 10;
config.fb_count = 2;
config.grab_mode = CAMERA_GRAB_LATEST;
} else {
// Limit the frame size when PSRAM is not available
config.frame_size = FRAMESIZE_SVGA;
config.fb_location = CAMERA_FB_IN_DRAM;
}
} else {
// Best option for face detection/recognition
config.frame_size = FRAMESIZE_240X240;
#if CONFIG_IDF_TARGET_ESP32S3
config.fb_count = 2;
#endif
}
#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
if (config.pixel_format == PIXFORMAT_JPEG) {
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
#if defined(CAMERA_MODEL_ESP32S3_EYE)
s->set_vflip(s, 1);
#endif
// Setup LED FLash if LED pin is defined in camera_pins.h
#if defined(LED_GPIO_NUM)
setupLedFlash(LED_GPIO_NUM);
#endif
//#######################################################################################
// PRECONFIG MANUALLY
// set fixed camera resolution and other camera parameters
// configure LED brightness in file "app_httpd.cpp" with parameter "int led_duty" in line 36
s->set_framesize(s, FRAMESIZE_SVGA);
s->set_vflip(s,1);
s->set_hmirror(s,1);
s->set_special_effect(s, 2); // 2 = Graustufenmodus
//#######################################################################################
WiFi.begin(ssid, password);
WiFi.setSleep(false);
Serial.print("WiFi connecting");
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() {
// Do nothing. Everything is done in another task by the web server
checkWiFiConnection(); // WLAN-Verbindung regelmäßig prüfen
delay(10000);
}
Funktion einfügen
