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esp32cam-demo
kopia lustrzana https://github.com/alanesq/esp32cam-demo
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Update ESP32cam-demo.ino 

Much improved with the help of https://aistudio.google.com/
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Alan 2025-04-01 10:55:41 +01:00 zatwierdzone przez GitHub
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ESP32cam-demo.ino
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@ -101,7 +101,7 @@
// -SETTINGS
// ---------------------------------------------------------------
char* stitle = "ESP32CamDemo"; // title of this sketch
char* stitle = "BackCam"; // title of this sketch
char* sversion = "01Apr25"; // Sketch version
framesize_t FRAME_SIZE_IMAGE = FRAMESIZE_SVGA; // default camera resolution
@ -510,11 +510,14 @@ if (reset) {
// check the esp32cam board has a psram chip installed (extra memory used for storing captured images)
// Note: if not using "AI thinker esp32 cam" in the Arduino IDE, PSRAM must be enabled
if (!psramFound()) {
if (serialDebug) Serial.println("Warning: No PSRam found so defaulting to image size 'CIF'");
config.frame_size = FRAMESIZE_SVGA;
config.fb_location = CAMERA_FB_IN_DRAM;
}
if (!psramFound()) {
if (serialDebug) Serial.println("Warning: No PSRam found so defaulting to smaller image size 'VGA' in DRAM");
config.frame_size = FRAMESIZE_VGA;
config.fb_location = CAMERA_FB_IN_DRAM;
} else {
// If PSRAM IS found, explicitly set fb_location
config.fb_location = CAMERA_FB_IN_PSRAM;
}
esp_err_t camerr = esp_camera_init(&config); // initialise the camera
if (camerr != ESP_OK) {
@ -783,10 +786,12 @@ byte storeImage() {
if (serialDebug) Serial.println("Failed to create file in Spiffs - will format and try again");
if (!SPIFFS.format()) { // format spiffs
if (serialDebug) Serial.println("Spiffs format failed");
return 0;
} else {
file = SPIFFS.open(spiffsFilename, FILE_WRITE); // try again to create new file
if (!file) {
if (serialDebug) Serial.println("Still unable to create file in spiffs");
return 0;
}
}
}
@ -795,6 +800,8 @@ byte storeImage() {
sRes = 1; // flag as saved ok
} else {
if (serialDebug) Serial.println("Error: failed to write image data to spiffs file");
file.close();
return 0;
}
}
esp_camera_fb_return(fb); // return camera frame buffer
@ -1097,43 +1104,45 @@ void handleData(){
SDtotalSpace = SD_MMC.totalBytes() / (1024 * 1024);
SDfreeSpace = SDtotalSpace - SDusedSpace;
}
String reply = "";
server.setContentLength(CONTENT_LENGTH_UNKNOWN);
server.send(200, "text/plain", "");
// line1 - sd card
if (!sdcardPresent) {
reply += "<span style='color:blue;'>NO SD CARD DETECTED</span>";
server.sendContent("<span style='color:blue;'>NO SD CARD DETECTED</span>");
} else {
reply += "SD Card: " + String(SDusedSpace) + "MB used - " + String(SDfreeSpace) + "MB free";
server.sendContent("SD Card: " + String(SDusedSpace) + "MB used - " + String(SDfreeSpace) + "MB free");
}
reply += ",";
server.sendContent(",");
// line2 - illumination/flash led
reply += "Illumination led brightness=" + String(brightLEDbrightness);
reply += " &ensp; Flash is "; // Note: '&ensp;' leaves a gap
reply += (flashRequired) ? "Enabled" : "Off";
reply += ",";
server.sendContent("Illumination led brightness=" + String(brightLEDbrightness));
server.sendContent(" &ensp; Flash is "); // Note: '&ensp;' leaves a gap
server.sendContent( (flashRequired) ? "Enabled" : "Off" );
server.sendContent(",");
// line3 - Current real time
reply += "Current time: " + localTime();
reply += ",";
server.sendContent("Current time: " + localTime());
server.sendContent(",");
// line4 - gpio pin status
reply += "GPIO output pin 12 is: ";
reply += (digitalRead(iopinB)==1) ? "ON" : "OFF";
reply += " &ensp; GPIO input pin 13 is: ";
reply += (digitalRead(iopinA)==1) ? "ON" : "OFF";
reply += ",";
server.sendContent("GPIO output pin 12 is: ");
server.sendContent( (digitalRead(iopinB)==1) ? "ON" : "OFF" );
server.sendContent(" &ensp; GPIO input pin 13 is: ");
server.sendContent( (digitalRead(iopinA)==1) ? "ON" : "OFF" );
server.sendContent(",");
// line5 - image resolution
reply += "Image size: " + ImageResDetails;
reply += ",";
server.sendContent("Image size: " + ImageResDetails);
server.sendContent(",");
// line6 - memory - wifi
reply += "Free memory: " + String(ESP.getFreeHeap() /1000) + "K";
if (!psramFound()) reply += " (No PSRAM found!)";
reply += "&ensp; Wifi strength: " + String(WiFi.RSSI()) + "dBm";
server.sendContent("Free memory: " + String(ESP.getFreeHeap() /1000) + "K");
if (!psramFound()) server.sendContent(" (No PSRAM found!)");
server.sendContent("&ensp; Wifi strength: " + String(WiFi.RSSI()) + "dBm");
server.send(200, "text/plane", reply); //Send millis value only to client ajax request
// server.client().stop();
}
@ -1367,16 +1376,18 @@ void readRGBImage() {
sendText(client,"Free psram after rgb data allocated = " + String(heap_caps_get_free_size(MALLOC_CAP_SPIRAM) / 1024) + "K");
// convert the captured jpg image (fb) to rgb data (store in 'rgb' array)
tTimer = millis(); // store time that image conversion process started
bool jpeg_converted = fmt2rgb888(fb->buf, fb->len, PIXFORMAT_JPEG, rgb);
if (!jpeg_converted) {
sendText(client,"error: failed to convert image to RGB data");
if (!sendRGBfile) {
client.write("<br><a href='/'>Return</a>\n"); // link back
sendFooter(client); // close web page
}
return;
}
tTimer = millis(); // store time that image conversion process started
bool jpeg_converted = fmt2rgb888(fb->buf, fb->len, PIXFORMAT_JPEG, rgb);
if (!jpeg_converted) {
sendText(client,"error: failed to convert image to RGB data");
heap_caps_free(ptrVal);
esp_camera_fb_return(fb);
if (!sendRGBfile) {
client.write("<br><a href='/'>Return</a>\n"); // link back
sendFooter(client); // close web page
}
return;
}
sendText(client, "Conversion from jpg to RGB took " + String(millis() - tTimer) + " milliseconds");// report how long the conversion took
@ -1711,7 +1722,15 @@ void readGrayscaleImage() {
delay(100);
analogWrite(brightLED, currentBrightness); // change LED brightness back to previous state
}
if (!fb) client.println("Error: Camera image capture failed");
if (!fb) {
client.println("Error: Camera image capture failed");
// Ensure we switch back even on failure
esp_camera_deinit();
delay(camChangeDelay);
initialiseCamera(1);
sendFooter(client); // Close page if needed
return; // Exit
}
// // read image data and calculate average pixel value (as demonstration of reading the image data)
// // note: image x = i % WIDTH, image y = floor(i / WIDTH)
@ -1729,7 +1748,19 @@ void readGrayscaleImage() {
// resize the image
int newWidth = 115; int newHeight = 42; // much bigger than this seems to cause problems, possible web page is too large?
byte newBuf[newWidth * newHeight];
size_t newBufSize = newWidth * newHeight;
byte* newBuf = (byte*)malloc(newBufSize);
if (!newBuf) {
client.println("Error: Failed to allocate memory for resized buffer");
esp_camera_fb_return(fb); // Clean up camera buffer
// Switch back to JPG before returning
esp_camera_deinit();
delay(camChangeDelay);
initialiseCamera(1);
sendFooter(client); // Close page if needed
return; // Exit
}
resize_esp32cam_image_buffer(fb->buf, fb->width, fb->height, newBuf, newWidth, newHeight);
// Get the min and max values in the new resized image
@ -1764,7 +1795,8 @@ void readGrayscaleImage() {
delay(3);
client.stop();
// return image frame to free up memory
// free up memory
free(newBuf);
esp_camera_fb_return(fb); // return camera frame buffer
// change camera back to JPG mode