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;
}
`