Мобильная версияI'm working on a project using the ESP32-CAM module, where I capture an image with the camera and send it to a server using an HTTP POST request. The server then processes the image using an AI API. The image transmission part works correctly, but approximately 6 seconds after sending the image, the ESP32 reports an error: "Error sending HTTP POST request: -11." Additionally, it doesn't wait for the server's response. I'm puzzled by this behavior and would appreciate any insights into why it's happening.
My ESP32 code :
#include "WiFi.h" #include "esp_camera.h" #include "Arduino.h" #include "soc/soc.h" // Disable brownout problems #include "soc/rtc_cntl_reg.h" // Disable brownout problems #include "driver/rtc_io.h" #include // Replace with your network credentials const char* ssid = "WIFI_NAME"; const char* password = "WIFI_PSSWD"; // Replace with your PHP page URL const char* phpURL = "http://192.168.0.116:80/index.php"; // OV2640 camera module pins (CAMERA_MODEL_AI_THINKER) #define PWDN_GPIO_NUM 32 #define RESET_GPIO_NUM -1 #define XCLK_GPIO_NUM 0 #define SIOD_GPIO_NUM 26 #define SIOC_GPIO_NUM 27 #define Y9_GPIO_NUM 35 #define Y8_GPIO_NUM 34 #define Y7_GPIO_NUM 39 #define Y6_GPIO_NUM 36 #define Y5_GPIO_NUM 21 #define Y4_GPIO_NUM 19 #define Y3_GPIO_NUM 18 #define Y2_GPIO_NUM 5 #define VSYNC_GPIO_NUM 25 #define HREF_GPIO_NUM 23 #define PCLK_GPIO_NUM 22 void setup() { // Serial port for debugging purposes Serial.begin(115200); // Connect to Wi-Fi WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("Connecting to WiFi..."); } // Turn-off the 'brownout detector' WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); // OV2640 camera module pins 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_sscb_sda = SIOD_GPIO_NUM; config.pin_sscb_scl = SIOC_GPIO_NUM; config.pin_pwdn = PWDN_GPIO_NUM; config.pin_reset = RESET_GPIO_NUM; config.xclk_freq_hz = 20000000; config.pixel_format = PIXFORMAT_JPEG; if (psramFound()) { config.frame_size = FRAMESIZE_UXGA; config.jpeg_quality = 10; config.fb_count = 2; } else { config.frame_size = FRAMESIZE_SVGA; config.jpeg_quality = 12; config.fb_count = 1; } // Camera init esp_err_t err = esp_camera_init(&config); if (err != ESP_OK) { Serial.printf("Camera init failed with error 0x%x", err); ESP.restart(); } //Let the camera adapt to the environment (light, exposure, etc..) camera_fb_t* fb = nullptr; // Skip first N frames. for (int i = 0; i < 3; i++) { fb = esp_camera_fb_get(); esp_camera_fb_return(fb); fb = nullptr; delay(500); // delay between photos } // Set timeout for HTTP client HTTPClient http; http.setTimeout(60000); // Set timeout to 60 seconds (adjust as needed) // Take photo and send to PHP page captureAndSendPhoto(); } void loop() { delay(10000); captureAndSendPhoto(); } void captureAndSendPhoto() { camera_fb_t* fb = NULL; // pointer // Take a photo with the camera Serial.println("Taking a photo..."); fb = esp_camera_fb_get(); if (!fb) { Serial.println("Camera capture failed"); return; } // Send HTTP POST request to PHP page Serial.println("Sending photo to PHP page..."); HTTPClient http; http.begin(phpURL); http.addHeader("Content-Type", "image/jpeg"); int httpResponseCode = http.POST((uint8_t*)fb->buf, fb->len); // Check for errors if (httpResponseCode > 0) { Serial.print("HTTP Response code: "); Serial.println(httpResponseCode); // Print the content of the page String response = http.getString(); Serial.println("Response content:"); Serial.println(response); } else { Serial.print("Error sending HTTP POST request: "); Serial.println(httpResponseCode); } // Free up memory esp_camera_fb_return(fb); } And the PHP code on server-side :
Additional Information:
- The ESP32-CAM module is connected to a Wi-Fi network and communicates with the server via HTTP.
- The server receives the image and processes it by saving it as a jpg file without any issues
- The error occurs approximately 6 seconds after sending the image, and the ESP32 doesn't wait for the server's response.
- I've tried troubleshooting by increasing the timeout both on the server and on the ESP32, but the issue persists.
- Requests seems to works fine with Reqbin
Any insights or suggestions on resolving this issue would be greatly appreciated.
Источник: https://stackoverflow.com/questions/781 ... -to-server
