kopia lustrzana https://github.com/alanesq/esp32cam-demo
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Alan
GitHub
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21c5676e01
commit
3095a31aed
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@ -43,7 +43,7 @@
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const char* password = "<your wifi password here>";
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const char* stitle = "ESP32Cam-demo"; // title of this sketch
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const char* sversion = "12Nov20"; // Sketch version
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const char* sversion = "13Nov20"; // Sketch version
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const bool debugInfo = 1; // show additional debug info. on serial port (1=enabled)
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@ -88,6 +88,7 @@ WebServer server(80); // serve web pages on port 80
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uint32_t lastCamera = millis(); // timer for periodic image capture
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bool sdcardPresent; // flag if an sd card is detected
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int imageCounter; // image file name on sd card counter
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String tReply; // temp text store
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// camera settings (for the standard - OV2640 - CAMERA_MODEL_AI_THINKER)
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// see: https://randomnerdtutorials.com/esp32-cam-camera-pin-gpios/
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@ -690,21 +691,21 @@ void handleNotFound() {
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Serial.print("Invalid page requested");
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}
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String message = "File Not Found\n\n";
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message += "URI: ";
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message += server.uri();
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message += "\nMethod: ";
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message += ( server.method() == HTTP_GET ) ? "GET" : "POST";
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message += "\nArguments: ";
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message += server.args();
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message += "\n";
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tReply = "File Not Found\n\n";
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tReply += "URI: ";
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tReply += server.uri();
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tReply += "\nMethod: ";
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tReply += ( server.method() == HTTP_GET ) ? "GET" : "POST";
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tReply += "\nArguments: ";
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tReply += server.args();
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tReply += "\n";
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for ( uint8_t i = 0; i < server.args(); i++ ) {
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message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
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tReply += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
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}
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server.send ( 404, "text/plain", message );
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message = ""; // clear variable
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server.send ( 404, "text/plain", tReply );
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tReply = ""; // clear variable
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} // handleNotFound
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@ -719,64 +720,62 @@ void handleNotFound() {
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// note: Will fail on the highest resolution as it requires more than 4mb to store the data (in psram)
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void readRGBImage() {
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WiFiClient client = server.client(); // open link with client
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// log page request including clients IP address
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if (debugInfo) {
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IPAddress cip = client.remoteIP();
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Serial.printf("RGB requested from: %d.%d.%d.%d \n", cip[0], cip[1], cip[2], cip[3]);
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}
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// html header
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client.write("<!DOCTYPE html> <html lang='en'> <head> <title>photo</title> </head> <body>\n"); // basic html header
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String tReply = "LIVE IMAGE AS RGB DATA: "; // reply to send to web client and serial port
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if (debugInfo) Serial.println("Starting RGB procedure at millis=" + String(millis()));
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MessageRGB(client,"LIVE IMAGE AS RGB DATA"); // reply to send to web client and serial port
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MessageRGB(client,"Starting RGB procedure at millis=" + String(millis()));
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// capture a live image (jpg)
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camera_fb_t * fb = NULL;
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fb = esp_camera_fb_get();
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if (!fb) { // check for error when capturing image
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tReply+=" -Error capturing image from camera- ";
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Serial.println ("Error capturing image from camera");
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}
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tReply+="(Image resolution=" + String(fb->width) + "x" + String(fb->height) + ")"; // display image resolution
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// allocate memory to store rgb data (in psram)
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if (!psramFound()) { // check the esp32 module has a psram chip
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tReply+=" -Error no psram found- ";
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Serial.println ("Error: no psram found");
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}
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if (debugInfo) Serial.println("Free psram before rgb data stored = " + String(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)));
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void *ptrVal = NULL; // create a pointer for memory location to store the data
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uint32_t ARRAY_LENGTH = fb->width * fb->height * 3; // calculate memory required to store the RGB data (i.e. number of pixels in the jpg image x 3)
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if (heap_caps_get_free_size( MALLOC_CAP_SPIRAM) < ARRAY_LENGTH) { // check there is enough free memory in psram to store the RGB data
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tReply+=" -Error not enough free psram to store the rgb data- ";
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if (debugInfo) Serial.println("Error: not enough free psram to store the rgb data");
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}
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ptrVal = heap_caps_malloc(ARRAY_LENGTH, MALLOC_CAP_SPIRAM); // allocate memory space for the rgb data
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uint8_t *rgb = (uint8_t *)ptrVal; // create the 'rgb' array pointer to the allocated memory space
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if (debugInfo) Serial.println("Free psram after rgb data stored = " + String(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)));
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// ****** main code for converting captured image to RGB *****
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// convert the captured jpg image (fb) to rgb data (stored in 'rgb' array)
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bool jpeg_converted = fmt2rgb888(fb->buf, fb->len, PIXFORMAT_JPEG, rgb);
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if (!jpeg_converted) { // check for error converting image
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tReply+=" -Error converting image to RGB- ";
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Serial.println (" -Error converting image to RGB- ");
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}
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// capture a live image from camera (jpg)
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camera_fb_t * fb = NULL;
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fb = esp_camera_fb_get();
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if (!fb) MessageRGB(client," -error capturing image from camera- ");
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MessageRGB(client,"Image resolution=" + String(fb->width) + "x" + String(fb->height)); // display image resolution
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// allocate memory to store rgb data (in psram)
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if (!psramFound()) MessageRGB(client," -error no psram found- ");
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MessageRGB(client,"Free psram before rgb data stored = " + String(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)));
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void *ptrVal = NULL; // create a pointer for memory location to store the data
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uint32_t ARRAY_LENGTH = fb->width * fb->height * 3; // calculate memory required to store the RGB data (i.e. number of pixels in the jpg image x 3)
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if (heap_caps_get_free_size( MALLOC_CAP_SPIRAM) < ARRAY_LENGTH) MessageRGB(client," -error: not enough free psram to store the rgb data- ");
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ptrVal = heap_caps_malloc(ARRAY_LENGTH, MALLOC_CAP_SPIRAM); // allocate memory space for the rgb data
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uint8_t *rgb = (uint8_t *)ptrVal; // create the 'rgb' array pointer to the allocated memory space
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MessageRGB(client,"Free psram after rgb data stored = " + String(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)));
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// convert the captured jpg image (fb) to rgb data (stored in 'rgb' array)
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bool jpeg_converted = fmt2rgb888(fb->buf, fb->len, PIXFORMAT_JPEG, rgb);
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if (!jpeg_converted) MessageRGB(client," -error converting image to RGB- ");
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// examples of reading the resulting RGB data
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// ****** examples of reading the resulting RGB data *****
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uint32_t resultsToShow = 50; // how much data to display
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// display some of the resulting data
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for (uint32_t i = 0; i < resultsToShow; i++) {
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if (i%3 == 0) tReply+="B"; // 1st byte in series of three
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else if (i%3 == 1) tReply+="G"; // 2nd byte in series of three
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else if (i%3 == 2) tReply+="R"; // 3rd byte in series of three
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tReply+= String(rgb[i]) + ","; // the value associated with this colour
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MessageRGB(client,"R , G , B");
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for (uint32_t i = 0; i < resultsToShow-2; i+=3) {
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MessageRGB(client,String(rgb[i+2]) + "," + String(rgb[i+1]) + "," + String(rgb[i+0])); // Red , Green , Blue
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// // how to calculate the x and y coordinate of the pixel
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// uint16_t x = i % fb->width;
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// uint16_t y = floor(i / fb->width);
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}
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// find the average values for each colour over entire image
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uint32_t aRed = 0;
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uint32_t aGreen = 0;
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@ -789,27 +788,36 @@ void readRGBImage() {
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aRed = aRed / (fb->width * fb->height); // divide total by number of pixels to give the average value
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aGreen = aGreen / (fb->width * fb->height);
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aBlue = aBlue / (fb->width * fb->height);
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tReply+=" - Average Blue = " + String(aBlue);
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tReply+=", Average Green = " + String(aGreen);
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tReply+=", Average Red = " + String(aRed);
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MessageRGB(client,"Average Blue = " + String(aBlue));
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MessageRGB(client,"Average Green = " + String(aGreen));
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MessageRGB(client,"Average Red = " + String(aRed));
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// *******************************************************
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MessageRGB(client,"Finishing RGB procedure at millis=" + String(millis()));
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// end html
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client.write("</body></html>\n");
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delay(3);
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client.stop();
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// finished with the data so free up the space used in psram
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esp_camera_fb_return(fb);
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heap_caps_free(ptrVal);
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if (debugInfo) { // send results to serial port
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Serial.println("Finishing RGB procedure at millis=" + String(millis()));
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Serial.println(tReply);
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}
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server.send ( 404, "text/plain", tReply); // send results via web page
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} // readRGBImage
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// send line of text to both serial port and web page
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void MessageRGB(WiFiClient &client, String theText) {
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client.print(theText + "<br>\n");
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if (debugInfo || theText.indexOf('error') > 0) Serial.println (theText);
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}
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// ******************************************************************************************************************
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