Esp32 cam QR code decoding failed error

[shaaahan]

Hey! I am using this library with my own sketch and everything seemed to work well the first few times but now it always shows a "Decoding Failed" error every time I try to decode a Qr code. As I am not a pro in Arduino, can someone direct me to where my mistake is?

Note: I once tried to establish a com between Esp32 and the cam module does that happen to be a problem? Also, the cam module once fell from my hand. But the camera is working pretty fine.

This is my code ----

` /* ======================================== Including the libraries. / #include "esp_camera.h" #include "soc/soc.h" #include "soc/rtc_cntl_reg.h" #include "quirc.h" / ======================================== */

// creating a task handle TaskHandle_t QRCodeReader_Task;

/* ======================================== Select camera model */

#define CAMERA_MODEL_AI_THINKER

/* ======================================== */

/* ======================================== GPIO of camera models */

#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

/* ======================================== Variables declaration */ struct QRCodeData { bool valid; int dataType; uint8_t payload[1024]; int payloadLen; };

struct quirc *q = NULL; uint8_t image = NULL;
camera_fb_t * fb = NULL; struct quirc_code code; struct quirc_data data; quirc_decode_error_t err; struct QRCodeData qrCodeData;
String QRCodeResult = ""; / ======================================== */

/* ________________________________________________________________________________ VOID SETTUP() */ void setup() {

// Disable brownout detector. WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);

/* ---------------------------------------- Init serial communication speed (baud rate). / Serial.begin(112500); Serial.setDebugOutput(true); Serial.println(); / ---------------------------------------- */

/* ---------------------------------------- Camera configuration. */ Serial.println("Start configuring and initializing the camera..."); 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 = 10000000; config.pixel_format = PIXFORMAT_GRAYSCALE; config.frame_size = FRAMESIZE_QVGA; config.jpeg_quality = 15; config.fb_count = 1;

#if defined(CAMERA_MODEL_ESP_EYE) pinMode(13, INPUT_PULLUP); pinMode(14, INPUT_PULLUP); #endif

esp_err_t err = esp_camera_init(&config); if (err != ESP_OK) { Serial.printf("Camera init failed with error 0x%x", err); ESP.restart(); }

sensor_t * s = esp_camera_sensor_get(); s->set_framesize(s, FRAMESIZE_QVGA);

Serial.println("Configure and initialize the camera successfully."); Serial.println(); /* ---------------------------------------- */

/* ---------------------------------------- create "QRCodeReader_Task" using the xTaskCreatePinnedToCore() function / xTaskCreatePinnedToCore( QRCodeReader, / Task function. / "QRCodeReader_Task", / name of task. / 10000, / Stack size of task / NULL, / parameter of the task / 1, / priority of the task / &QRCodeReader_Task, / Task handle to keep track of created task / 0); / pin task to core 0 / / ---------------------------------------- / } / ________________________________________________________________________________ / void loop() { delay(100); } / ________________________________________________________________________________ */

/* ________________________________________________________________________________ The function to be executed by "QRCodeReader_Task" / // This function is to instruct the camera to take or capture a QR Code image, then it is processed and translated into text. void QRCodeReader( void * pvParameters ){ / ---------------------------------------- / Serial.println("QRCodeReader is ready."); Serial.print("QRCodeReader running on core "); Serial.println(xPortGetCoreID()); Serial.println(); / ---------------------------------------- */

/* ---------------------------------------- Loop to read QR Code in real time. */ while(1){ q = quirc_new(); if (q == NULL){ Serial.print("can't create quirc object\r\n");
continue; }

  fb = esp_camera_fb_get();
  if (!fb)
  {
    Serial.println("Camera capture failed");
    continue;
  }   
  
  quirc_resize(q, fb->width, fb->height);
  image = quirc_begin(q, NULL, NULL);
  memcpy(image, fb->buf, fb->len);
  quirc_end(q);
  
  int count = quirc_count(q);
  if (count > 0) {
    quirc_extract(q, 0, &code);
    err = quirc_decode(&code, &data);

    if (err){
      Serial.println("Decoding FAILED");
      QRCodeResult = "Decoding FAILED";
    } else {
      Serial.printf("Decoding successful:\n");
      dumpData(&data);
    } 
    Serial.println();
  } 
  
  esp_camera_fb_return(fb);
  fb = NULL;
  image = NULL;  
  quirc_destroy(q);

} /* ---------------------------------------- / } / ________________________________________________________________________________ */

/* ________________________________________________________________________________ Function to display the results of reading the QR Code on the serial monitor. */ void dumpData(const struct quirc_data *data) { Serial.printf("Version: %d\n", data->version); Serial.printf("ECC level: %c\n", "MLHQ"[data->ecc_level]); Serial.printf("Mask: %d\n", data->mask); Serial.printf("Length: %d\n", data->payload_len); Serial.printf("Payload: %s\n", data->payload);

QRCodeResult = (const char *)data->payload; } `