ESP32_Project/ESP32QRReaderDBWriterVideoStreamer/ESP32QRReaderDBWriterVideoStreamer.ino

/*
ESP32-CAM QR code Reader
Author : ChungYi Fu (Kaohsiung, Taiwan)  2021-8-13 20:00
https://www.facebook.com/francefu

Refer to the code
https://github.com/alvarowolfx/ESP32QRCodeReader

自訂指令格式 http://192.168.xxx.xxx/control?cmd=P1;P2;P3;P4;P5;P6;P7;P8;P9

http://192.168.xxx.xxx/?ip                      //取得APIP, STAIP
http://192.168.xxx.xxx/?mac                     //取得MAC位址
http://192.168.xxx.xxx/?digitalwrite=pin;value  //數位輸出
http://192.168.xxx.xxx/?analogwrite=pin;value   //類比輸出
http://192.168.xxx.xxx/?digitalread=pin         //數位讀取
http://192.168.xxx.xxx/?analogread=pin          //類比讀取
http://192.168.xxx.xxx/?touchread=pin           //觸碰讀取
http://192.168.xxx.xxx/?restart                 //重啟電源
http://192.168.xxx.xxx/?flash=value             //閃光燈 value= 0~255
http://192.168.xxx.xxx/?servo=pin;value         //伺服馬達 value= 0~180
http://192.168.xxx.xxx/?relay=pin;value         //繼電器 value = 0, 1
http://192.168.xxx.xxx/?uart=value              //序列埠
*/


/*********
  Rui Santos
  Complete project details at https://RandomNerdTutorials.com/esp32-cam-video-streaming-web-server-camera-home-assistant/
  
  IMPORTANT!!! 
   - Select Board "AI Thinker ESP32-CAM"
   - GPIO 0 must be connected to GND to upload a sketch
   - After connecting GPIO 0 to GND, press the ESP32-CAM on-board RESET button to put your board in flashing mode
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files.

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
*********/



// Serial.printf(); kann anscheinend keine Strings ausgeben, die länger als 13 Zeichen sind -> dadurch gehts: Serial.printf("Insertcommand: %s\n:", INSERT_SQL.c_str());

#include "esp_camera.h"          //視訊函式
//#include "soc/soc.h"             //用於電源不穩不重開機 
#include "soc/rtc_cntl_reg.h"    //用於電源不穩不重開機 
#include "quirc.h"

//Includes&defines etc für den MariaDB Entry ###########################################################
#include "defines.h"
#include "Credentials.h"






#include <MySQL_Generic.h>

#define USING_HOST_NAME     false

#if USING_HOST_NAME
  // Optional using hostname, and Ethernet built-in DNS lookup
  char server[] = "your_account.ddns.net"; // change to your server's hostname/URL
#else
  IPAddress server(10, 42, 0, 1);
#endif

uint16_t server_port = 3306;    //5698;

char default_database[] = "myTestDb";           //"test_arduino";
char default_table[]    = "myTestTable";          //"test_arduino";

String default_value    = "defaultString"; 

// Sample query
String INSERT_SQL = String("INSERT INTO ") + default_database + "." + default_table 
                 + " (qrCodeText) VALUES ('" + default_value + "')";


#define LED_BUILTIN 4   //die Zeile wird für das LED benötigt


MySQL_Connection conn((Client *)&client);

MySQL_Query *query_mem;
//Includes&defines etc für den MariaDB Entry - ENDE ####################################################

TaskHandle_t Task;

//ESP32-CAM 安信可模組腳位設定
#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

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 = "";

camera_config_t config;





// Videostreamer - Anfang ################################################
#include "esp_camera.h"
#include <WiFi.h>
#include "esp_timer.h"
#include "img_converters.h"
#include "Arduino.h"
#include "fb_gfx.h"
#include "soc/soc.h" //disable brownout problems
#include "soc/rtc_cntl_reg.h"  //disable brownout problems
#include "esp_http_server.h"

//Replace with your network credentials
//const char* ssid = "cpsNUCwifi";
//const char* pass = "ips999CPS";

#define PART_BOUNDARY "123456789000000000000987654321"

// This project was tested with the AI Thinker Model, M5STACK PSRAM Model and M5STACK WITHOUT PSRAM
#define CAMERA_MODEL_AI_THINKER
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WITHOUT_PSRAM

// Not tested with this model
//#define CAMERA_MODEL_WROVER_KIT

#if defined(CAMERA_MODEL_WROVER_KIT)
  #define PWDN_GPIO_NUM    -1
  #define RESET_GPIO_NUM   -1
  #define XCLK_GPIO_NUM    21
  #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      19
  #define Y4_GPIO_NUM      18
  #define Y3_GPIO_NUM       5
  #define Y2_GPIO_NUM       4
  #define VSYNC_GPIO_NUM   25
  #define HREF_GPIO_NUM    23
  #define PCLK_GPIO_NUM    22

#elif defined(CAMERA_MODEL_M5STACK_PSRAM)
  #define PWDN_GPIO_NUM     -1
  #define RESET_GPIO_NUM    15
  #define XCLK_GPIO_NUM     27
  #define SIOD_GPIO_NUM     25
  #define SIOC_GPIO_NUM     23
  
  #define Y9_GPIO_NUM       19
  #define Y8_GPIO_NUM       36
  #define Y7_GPIO_NUM       18
  #define Y6_GPIO_NUM       39
  #define Y5_GPIO_NUM        5
  #define Y4_GPIO_NUM       34
  #define Y3_GPIO_NUM       35
  #define Y2_GPIO_NUM       32
  #define VSYNC_GPIO_NUM    22
  #define HREF_GPIO_NUM     26
  #define PCLK_GPIO_NUM     21

#elif defined(CAMERA_MODEL_M5STACK_WITHOUT_PSRAM)
  #define PWDN_GPIO_NUM     -1
  #define RESET_GPIO_NUM    15
  #define XCLK_GPIO_NUM     27
  #define SIOD_GPIO_NUM     25
  #define SIOC_GPIO_NUM     23
  
  #define Y9_GPIO_NUM       19
  #define Y8_GPIO_NUM       36
  #define Y7_GPIO_NUM       18
  #define Y6_GPIO_NUM       39
  #define Y5_GPIO_NUM        5
  #define Y4_GPIO_NUM       34
  #define Y3_GPIO_NUM       35
  #define Y2_GPIO_NUM       17
  #define VSYNC_GPIO_NUM    22
  #define HREF_GPIO_NUM     26
  #define PCLK_GPIO_NUM     21

#elif defined(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
#else
  #error "Camera model not selected"
#endif

static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";

httpd_handle_t stream_httpd = NULL;

static esp_err_t stream_handler(httpd_req_t *req){  //wenn via Browser (ip-Adresseingabe) auf den Stream zugegriffen wird, dann wird die Methode aufgerufen
  camera_fb_t * fb = NULL;
  esp_err_t res = ESP_OK;
  size_t _jpg_buf_len = 0;
  uint8_t * _jpg_buf = NULL;
  char * part_buf[64];

  res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
  if(res != ESP_OK){
    return res;
  }

  while(true){
    fb = esp_camera_fb_get();
    if (!fb) {
      Serial.println("Camera capture failed");
      res = ESP_FAIL;
    } else {
      if(fb->width > 400){
        if(fb->format != PIXFORMAT_JPEG){
          bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
          esp_camera_fb_return(fb);
          fb = NULL;
          if(!jpeg_converted){
            Serial.println("JPEG compression failed");
            res = ESP_FAIL;
          }
        } else {
          _jpg_buf_len = fb->len;
          _jpg_buf = fb->buf;
        }
      }
    }
    if(res == ESP_OK){
      size_t hlen = snprintf((char *)part_buf, 64, _STREAM_PART, _jpg_buf_len);
      res = httpd_resp_send_chunk(req, (const char *)part_buf, hlen);
    }
    if(res == ESP_OK){
      res = httpd_resp_send_chunk(req, (const char *)_jpg_buf, _jpg_buf_len);
    }
    if(res == ESP_OK){
      res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
    }
    if(fb){
      esp_camera_fb_return(fb);
      fb = NULL;
      _jpg_buf = NULL;
    } else if(_jpg_buf){
      free(_jpg_buf);
      _jpg_buf = NULL;
    }
    if(res != ESP_OK){
      break;
    }
    //Serial.printf("MJPG: %uB\n",(uint32_t)(_jpg_buf_len));
    Serial.println("Ausgabe");
  }
  Serial.println("Ausgabe dannach");
  return res;
}

void startCameraServer(){
  httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  config.server_port = 80;

Serial.println("davor");
  httpd_uri_t index_uri = {
    .uri       = "/",
    .method    = HTTP_GET,
    .handler   = stream_handler,
    .user_ctx  = NULL
  };
Serial.println("dannach");
  
  //Serial.printf("Starting web server on port: '%d'\n", config.server_port);
  if (httpd_start(&stream_httpd, &config) == ESP_OK) {
    httpd_register_uri_handler(stream_httpd, &index_uri);
  }
}
// Videostreamer ENDE ###################################################################





void setup() {


  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);  //關閉電源不穩就重開機的設定
      
  Serial.begin(115200);
  Serial.setDebugOutput(true);  //開啟診斷輸出
  Serial.println();

  pinMode(LED_BUILTIN, OUTPUT); //die Zeile wird für das LED benötigt




//Setup für insert in MariaDB #########################################################

  while (!Serial && millis() < 5000); // wait for serial port to connect

  MYSQL_DISPLAY1("\nStarting Basic_Insert_WiFi on", BOARD_NAME);
  MYSQL_DISPLAY(MYSQL_MARIADB_GENERIC_VERSION);

  // Remember to initialize your WiFi module
#if ( USING_WIFI_ESP8266_AT  || USING_WIFIESPAT_LIB ) 
  #if ( USING_WIFI_ESP8266_AT )
    MYSQL_DISPLAY("Using ESP8266_AT/ESP8266_AT_WebServer Library");
  #elif ( USING_WIFIESPAT_LIB )
    MYSQL_DISPLAY("Using WiFiEspAT Library");
  #endif
  
  // initialize serial for ESP module
  EspSerial.begin(115200);
  // initialize ESP module
  WiFi.init(&EspSerial);

  MYSQL_DISPLAY(F("WiFi shield init done"));

  // check for the presence of the shield
  if (WiFi.status() == WL_NO_SHIELD)
  {
    MYSQL_DISPLAY(F("WiFi shield not present"));
    // don't continue
    while (true);
  }
#endif

  // Begin WiFi section
  MYSQL_DISPLAY1("Connecting to", ssid);

  WiFi.begin(ssid, pass);
  
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(500);
    MYSQL_DISPLAY0(".");
    
    //ESP32-LED Output, dass es nicht mit dem WLAN verbunden ist
    digitalWrite(LED_BUILTIN, HIGH);
    delay(100);
    digitalWrite(LED_BUILTIN, LOW);
    delay(1000);
  }

  // print out info about the connection:
  MYSQL_DISPLAY1("Connected to network. My IP address is:", WiFi.localIP());

  MYSQL_DISPLAY3("Connecting to SQL Server @", server, ", Port =", server_port);
  MYSQL_DISPLAY5("User =", user, ", PW =", password, ", DB =", default_database);


  //ESP32-LED Output, dass es mit dem WLAN verbunden ist
  for(int i=0; i<3;i++){
    digitalWrite(LED_BUILTIN, HIGH);
    delay(100);
    digitalWrite(LED_BUILTIN, LOW);
    delay(300);
  }

//Setup für insert in MariaDB - Ende #########################################################


//Setup für den QR-Code Reader ###############################################################

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;         // beim QR Reader sind es 10000000
  //config.pixel_format = PIXFORMAT_JPEG;   // PIXFORMAT_GRAYSCALE
  config.pixel_format = PIXFORMAT_GRAYSCALE;   // PIXFORMAT_GRAYSCALE

  config.frame_size = FRAMESIZE_QVGA;
  config.jpeg_quality = 15;
  config.fb_count = 1;
 /*
  if(psramFound()){
    config.frame_size = FRAMESIZE_SVGA;     //
    //config.frame_size = FRAMESIZE_UXGA;   // das UXGA Format wirft in Kombination mit anderen Configs errors - FRAMESIZE_QVGA
    config.jpeg_quality = 10;             //15
    config.fb_count = 2;                  //1
                //1
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }
  */
  
  // Camera init
  esp_err_t err = esp_camera_init(&config);                   // wenn der QR-Setup auskommentiert wird, dann muss das einkommentiert werden
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }

  sensor_t * s = esp_camera_sensor_get();
  s->set_framesize(s, FRAMESIZE_VGA);  //der FRAMESIZE_QVGA Parameter wurde auf FRAMESIZE_SVGA geändert   

  //s->set_vflip(s, 1);  //垂直翻轉
  //s->set_hmirror(s, 1);  //水平鏡像
          
  //閃光燈(GPIO4)
  //ledcAttachPin(4, 4);  
  //ledcSetup(4, 5000, 8); 



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

  Serial.print("listenConnection running on core ");
  Serial.println(xPortGetCoreID());   
/* */

//Setup für den QR-Code Reader ENDE ###############################################################



  //Videostreamer Setup Anfang ########################################################################
  //WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
 
  //Serial.begin(115200);
  //Serial.setDebugOutput(false);
 
  //Die Konfig wurde in den QR-Code Readerteil kopiert
  /*
  //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;         // beim QR Reader sind es 10000000
  //config.pixel_format = PIXFORMAT_JPEG;   // PIXFORMAT_GRAYSCALE
  config.pixel_format = PIXFORMAT_GRAYSCALE;   // PIXFORMAT_GRAYSCALE

 
  if(psramFound()){
    config.frame_size = FRAMESIZE_SVGA;     //
    //config.frame_size = FRAMESIZE_UXGA;   // das UXGA Format wirft in Kombination mit anderen Configs errors - FRAMESIZE_QVGA
    config.jpeg_quality = 10;             //15
    config.fb_count = 2;                  //1
                //1
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }
  
  
  // Camera init
  esp_err_t err = esp_camera_init(&config);                   // wenn der QR-Setup auskommentiert wird, dann muss das einkommentiert werden
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  */
  /*
  // Wi-Fi connection
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  */
  Serial.print("Camera Stream Ready! Go to: http://");
  Serial.print(WiFi.localIP());
  
  // Start streaming web server
  startCameraServer();
  //Videostreamer Setup ENDE ########################################################################
}



void ledOutputError(){
  
      //ESP32 LED Ausgabe, dass etwas nicht funktioniert hat
      digitalWrite(LED_BUILTIN, HIGH);
      delay(100);
      digitalWrite(LED_BUILTIN, LOW);
      delay(100);
      digitalWrite(LED_BUILTIN, HIGH);
      delay(1000);
      digitalWrite(LED_BUILTIN, LOW);
      delay(100);
      digitalWrite(LED_BUILTIN, HIGH);
      delay(100);
      digitalWrite(LED_BUILTIN, LOW);

}


//###################################################################################
void runInsert() // MariaDB-Insert-Funktion
{
  // Initiate the query class instance
  MySQL_Query query_mem = MySQL_Query(&conn);

  if (conn.connected())
  {
    MYSQL_DISPLAY(INSERT_SQL);
    
    // Execute the query
    // KH, check if valid before fetching
    if ( !query_mem.execute(INSERT_SQL.c_str()) )
    {
      MYSQL_DISPLAY("Insert error");
      ledOutputError();
    }
    else
    {
      MYSQL_DISPLAY("Data Inserted.");

      //ESP32 LED Ausgabe, dass etwas inserted wurde
      digitalWrite(LED_BUILTIN, HIGH);
      delay(1000);
      digitalWrite(LED_BUILTIN, LOW);
    }
  }
  else
  {
    MYSQL_DISPLAY("Disconnected from Server. Can't insert.");
    ledOutputError();
  }
}



void loop() {
  delay(1);
}





void charToString(const char *str, String &dbInsertString){

  dbInsertString = "";  //max Länge 13 Zeichen für eine Ausgabe in Serial.printf 
  size_t len = strlen(str);
  dbInsertString.reserve(len);
  
  for(size_t i=0;i<len;i++){
    dbInsertString += str[i];
  }
  
  //Serial.printf("Ausgabe des Strings: %s\n",dbInsertString.c_str()); 
}


//###############################################################################################----------------------------
void QRCodeReader( void * pvParameters ){
  Serial.print("QRCodeReader running on core ");
  Serial.println(xPortGetCoreID());

  while(1){
    Serial.println("bin in der Schleife");
      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 2");
        continue;
      }   
      
      //Serial.printf("quirc_begin\r\n");
      quirc_resize(q, fb->width, fb->height);
      image = quirc_begin(q, NULL, NULL);
      //Serial.printf("Frame w h len: %d, %d, %d \r\n", fb->width, fb->height, fb->len);
      memcpy(image, fb->buf, fb->len);
      quirc_end(q);
      //Serial.printf("quirc_end\r\n");
      
      int count = quirc_count(q);
      if (count > 0) {
        Serial.println(count);
        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);

          //MariaDb-part #################--------------------
          MYSQL_DISPLAY("Connecting...");

        //Testen des char-Array-String-Konvertierens
        //char * str  = (char *) &data.payload[0];
        //charToString(str,default_value);
        
        

 //Der Database-Connect (etc) Teil wirft noch errors
         
          //if (conn.connect(server, server_port, user, password))
          if (conn.connectNonBlocking(server, server_port, user, password) != RESULT_FAIL)
          {
            delay(500);

            char * str  = (char *) &data.payload[0];  //nicht sicher ob man die Umwandlung braucht
            charToString(str,default_value);
            
            INSERT_SQL = String("INSERT INTO ") + default_database + "." + default_table + " (qrCodeText) VALUES ('" + default_value + "')";
            //Serial.printf("Insertcommand: %s\n:", INSERT_SQL.c_str());

            runInsert();
            conn.close();                     // close the connection
          } 
          else 
          {
            MYSQL_DISPLAY("\nConnect failed. Trying again on next iteration.");
            ledOutputError();
          }

        
          MYSQL_DISPLAY("\nSleeping...");
          MYSQL_DISPLAY("================================================");
          delay(2000);  //um nicht den gleichen Eintrag sofort doppelt drinnen zu haben
          //MariaDb-part-Ende #################--------------------

          //vTaskDelay(3000/portTICK_RATE_MS);
        } 
        Serial.println();
      } 

      
      esp_camera_fb_return(fb);
      fb = NULL;
      image = NULL;  
      quirc_destroy(q);
  }
}

//###############################################################################################
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_cast<char*>(reinterpret_cast<const char*>(data->payload));

  //default_value = reinterpret_cast<char*>(data.payload);
  //Serial.printf("MyTestPayload: %s\n", QRCodeResult);
  //Serial.printf("MyTestPayload: %s\n", "testString");

}