Trying QR Reader with Esp32-cam

[lill211]

Hi. I'm trying to make a QR reader and a web server at the same time, same esp32. It's possible?
The code runs good, the web server works but QR reader doesn't. I think that void QRCodeReader isn't starting but I don't understand what is wrong.

Code: Select all

#include "esp_camera.h"
#include <WiFi.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "quirc.h"

#define CAMERA_MODEL_AI_THINKER 
#include "camera_pins.h"
TaskHandle_t QRCodeReader_Task; 

const char *ssid = "c";
const char *password = "mecatronica";

void startCameraServer();
void setupLedFlash(int pin);

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 setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);
  Serial.println("Empezando configuracion...");
  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 (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;
    }
  }

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera fallo con error 0x%x", err);
    ESP.restart();
  }
  
  sensor_t * s = esp_camera_sensor_get();
  s->set_framesize(s, FRAMESIZE_QVGA);
  
  Serial.println("Configuracion exitosa.");
  Serial.println();

  xTaskCreatePinnedToCore(
             QRCodeReader,          /* Task function. */
             "QRCodeReader_Task",   /* name of task. */
             10000,                 /* Stack size of task */
             NULL,                  /* parameter of the task */
             0,                     /* priority of the task */
             &QRCodeReader_Task,    /* Task handle to keep track of created task */
             0);                    /* pin task to core 0 */
   delay(100);

  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }

  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
  }
  if (config.pixel_format == PIXFORMAT_JPEG) {
    s->set_framesize(s, FRAMESIZE_QVGA);
  }

  WiFi.begin(ssid, password);
  WiFi.setSleep(false);

  Serial.print("WiFi connecting");
  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() {
  delay(1);
}
void QRCodeReader( void * pvParameters ){
  Serial.println("Ready.");

  while(1){
      q = quirc_new();
      if (q == NULL){
        Serial.print("No se pueden leer.\r\n");  
        continue;
      }
    
      fb = esp_camera_fb_get();
      if (!fb)
      {
        Serial.println("La camara esta fallando.");
        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("Decodificacion fallida.");
          QRCodeResult = "Decoding FAILED";
        } else {
          Serial.printf("Decodificacion exitosa:\n");
          dumpData(&data);
        } 
        Serial.println();
      } 
      
      esp_camera_fb_return(fb);
      fb = NULL;
      image = NULL;  
      quirc_destroy(q);
  }
}

void dumpData(const struct quirc_data *data)
{

  Serial.printf("Resultado del QR: %s\n", data->payload);
  
  QRCodeResult = (const char *)data->payload;
}

[lbernstone]

Loop should have a huge delay (-1 aka UINT32_MAX) rather than essentially no delay. loop has a higher priority (1) than your task (0), so it is starving your process.