# ESP32Cam-MB Issues Uploading **URL:** \ **Category:** Uploading\ **Created:** [May 15, 2025, 6:26am UTC](https://forum.arduino.cc/t/esp32cam-mb-issues-uploading/1381627 "2025-05-15T06:26:17Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![liveyourlifenerd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/liveyourlifenerd/32/1127018_2.png) [@liveyourlifenerd](https://forum.arduino.cc/u/liveyourlifenerd)\ **Post date:** [May 15, 2025, 6:26am UTC](https://forum.arduino.cc/t/esp32cam-mb-issues-uploading/1381627/1 "2025-05-15T06:26:17Z")
![image](https://europe1.discourse-cdn.com/arduino/original/4X/c/e/a/cead31a4deafafba9332f77545e62f23967f315f.png) I'm having issues uploading any sketches to the esp32cam - i have tried all the fixes holding down buttons etc. to no awail I am connected via an USB the weird part is that whichever usb port i connect the esp to in my laptop it keeps showing COM-4. The ESP32CAm is showing wifi too! ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [May 15, 2025, 7:52am UTC](https://forum.arduino.cc/t/esp32cam-mb-issues-uploading/1381627/2 "2025-05-15T07:52:39Z")
I can't help you with ESP32 related stuff but in future please don't post screenshots of code or errors. Please read [https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/679966#posting-code-and-common-code-problems](https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/679966#posting-code-and-common-code-problems). > [@liveyourlifenerd](#): > > the weird part is that whichever usb port i connect the esp to in my laptop it keeps showing COM-4. Not necessarily weird. Windows USB enumeration works in mysterious ways. ---
**Author:** ![liveyourlifenerd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/liveyourlifenerd/32/1127018_2.png) [@liveyourlifenerd](https://forum.arduino.cc/u/liveyourlifenerd)\ **Post date:** [May 15, 2025, 8:10am UTC](https://forum.arduino.cc/t/esp32cam-mb-issues-uploading/1381627/3 "2025-05-15T08:10:10Z")
```arduino #include "esp_camera.h" #include // // 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_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 = " ********"; const char* password = " *********"; 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 //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 WiFi.begin(ssid, password); WiFi.setSleep(false); 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 delay(10000); } ``` This is my code - i blurred the wifi name / password The error i get now is ```arduino C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:207:44: error: 'std::list' has not been declared 207 | static void draw_face_boxes(fb_data_t *fb, std::list *results, int face_id) | ^~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:207:53: error: expected ',' or '...' before '<' token 207 | static void draw_face_boxes(fb_data_t *fb, std::list *results, int face_id) | ^ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp: In function 'void draw_face_boxes(fb_data_t*, int)': C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:211:9: error: 'face_id' was not declared in this scope 211 | if (face_id < 0) | ^ ~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:224:15: error: expected unqualified-id before '<' token 224 | for (std::::iterator prediction = results->begin(); prediction != results->end(); prediction++, i++) | ^ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:224:16: error: 'dl' has not been declared 224 | for (std::::iterator prediction = results->begin(); prediction != results->end(); prediction++, i++) | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:224:39: error: '::iterator' has not been declared; did you mean 'std::iterator'? 224 | for (std::::iterator prediction = results->begin(); prediction != results->end(); prediction++, i++) | ^ ~~~~~~~ | std::iterator In file included from C:/Users/User/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/xtensa-esp-elf/include/c++/14.2.0/bits/stl_algobase.h:65, from C:/Users/User/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/xtensa-esp-elf/include/c++/14.2.0/vector:62, from C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:44: C:/Users/User/AppData/Local/Arduino15/packages/esp32/tools/esp-x32/2411/xtensa-esp-elf/include/c++/14.2.0/bits/stl_iterator_base_types.h:127:34: note: 'std::iterator' declared here 127 | struct _GLIBCXX17_DEPRECATED iterator | ^ ~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:224:79: error: 'prediction' was not declared in this scope 224 | for (std::::iterator prediction = results->begin(); prediction != results->end(); prediction++, i++) | ^ ~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:224:93: error: 'results' was not declared in this scope 224 | for (std::::iterator prediction = results->begin(); prediction != results->end(); prediction++, i++) | ^ ~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp: In function 'esp_err_t capture_handler(httpd_req_t*)': C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:432:9: error: 'HumanFaceDetectMSR01' was not declared in this scope 432 | HumanFaceDetectMSR01 s1(0.1F, 0.5F, 10, 0.2F); | ^ ~~~~~~~~~~~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:433:9: error: 'HumanFaceDetectMNP01' was not declared in this scope 433 | HumanFaceDetectMNP01 s2(0.5F, 0.3F, 5); | ^ ~~~~~~~~~~~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:434:14: error: 'list' is not a member of 'std' 434 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:45:1: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' 44 | #include +++ |+#include 45 | // #include "human_face_detect_msr01.hpp" C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:434:19: error: 'dl' has not been declared 434 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:434:42: error: 'candidates' was not declared in this scope 434 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^ ~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:434:55: error: 's1' was not declared in this scope; did you mean 's'? 434 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:435:14: error: 'list' is not a member of 'std' 435 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:435:14: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:435:19: error: 'dl' has not been declared 435 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:435:42: error: 'results' was not declared in this scope 435 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^ ~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:435:52: error: 's2' was not declared in this scope; did you mean 's'? 435 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:482:9: error: 'HumanFaceDetectMSR01' was not declared in this scope 482 | HumanFaceDetectMSR01 s1(0.1F, 0.5F, 10, 0.2F); | ^ ~~~~~~~~~~~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:483:9: error: 'HumanFaceDetectMNP01' was not declared in this scope 483 | HumanFaceDetectMNP01 s2(0.5F, 0.3F, 5); | ^ ~~~~~~~~~~~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:484:14: error: 'list' is not a member of 'std' 484 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:484:14: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:484:19: error: 'dl' has not been declared 484 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:484:42: error: 'candidates' was not declared in this scope 484 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^ ~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:484:55: error: 's1' was not declared in this scope; did you mean 's'? 484 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:485:14: error: 'list' is not a member of 'std' 485 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:485:14: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:485:19: error: 'dl' has not been declared 485 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:485:42: error: 'results' was not declared in this scope 485 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^ ~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:485:52: error: 's2' was not declared in this scope; did you mean 's'? 485 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp: In function 'esp_err_t stream_handler(httpd_req_t*)': C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:542:5: error: 'HumanFaceDetectMSR01' was not declared in this scope 542 | HumanFaceDetectMSR01 s1(0.1F, 0.5F, 10, 0.2F); | ^ ~~~~~~~~~~~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:543:5: error: 'HumanFaceDetectMNP01' was not declared in this scope 543 | HumanFaceDetectMNP01 s2(0.5F, 0.3F, 5); | ^ ~~~~~~~~~~~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:628:26: error: 'list' is not a member of 'std' 628 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:628:26: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:628:31: error: 'dl' has not been declared 628 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:628:54: error: 'candidates' was not declared in this scope 628 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^ ~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:628:67: error: 's1' was not declared in this scope; did you mean 's'? 628 | std::list &candidates = s1.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:629:26: error: 'list' is not a member of 'std' 629 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:629:26: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:629:31: error: 'dl' has not been declared 629 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:629:54: error: 'results' was not declared in this scope 629 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^ ~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:629:64: error: 's2' was not declared in this scope; did you mean 's'? 629 | std::list &results = s2.infer((uint16_t *)fb->buf, {(int)fb->height, (int)fb->width, 3}, candidates); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:689:34: error: 'list' is not a member of 'std' 689 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:689:34: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:689:39: error: 'dl' has not been declared 689 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:689:62: error: 'candidates' was not declared in this scope 689 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^ ~~~~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:689:75: error: 's1' was not declared in this scope; did you mean 's'? 689 | std::list &candidates = s1.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:690:34: error: 'list' is not a member of 'std' 690 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:690:34: note: 'std::list' is defined in header ''; this is probably fixable by adding '#include ' C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:690:39: error: 'dl' has not been declared 690 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:690:62: error: 'results' was not declared in this scope 690 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^ ~~~~~~ C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:690:72: error: 's2' was not declared in this scope; did you mean 's'? 690 | std::list &results = s2.infer((uint8_t *)out_buf, {(int)out_height, (int)out_width, 3}, candidates); | ^~ | s C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp: In function 'void setupLedFlash(int)': C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:1389:5: error: 'ledcSetup' was not declared in this scope; did you mean 'ledc_stop'? 1389 | ledcSetup(LED_LEDC_CHANNEL, 5000, 8); | ^ ~~~~~~~~ | ledc_stop C:\Users\User\OneDrive - Hennlich d.o.o\Namizje\ESP32-Camera_Webserver-main\CameraWebServer\app_httpd.cpp:1390:5: error: 'ledcAttachPin' was not declared in this scope; did you mean 'ledcAttach'? 1390 | ledcAttachPin(pin, LED_LEDC_CHANNEL); | ^ ~~~~~~~~~~~~ | ledcAttach exit status 1 Compilation error: 'std::list' has not been declared ``` ---
**Author:** ![sonofcy](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sonofcy/32/1283617_2.png) [@sonofcy](https://forum.arduino.cc/u/sonofcy)\ **Post date:** [May 15, 2025, 3:07pm UTC](https://forum.arduino.cc/t/esp32cam-mb-issues-uploading/1381627/4 "2025-05-15T15:07:42Z")
The last error is easy, the current version of the boards is not compatible with ledcAttach and a few others. Here is the screen grab from the Migration document. Your original error was an upload error on an MB board. I have a dozen or so of those, and they are problematic. Get an FTDI board to do the upload, which has never failed for me. ![Screenshot 2025-05-15 at 11.05.03](https://europe1.discourse-cdn.com/arduino/original/4X/3/a/b/3ab1ca7a900449e57ed2f34a51b0e8465278f8c9.png) ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [November 11, 2025, 3:07pm UTC](https://forum.arduino.cc/t/esp32cam-mb-issues-uploading/1381627/5 "2025-11-11T15:07:53Z")
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