Question about connecting SD card

Hello
I have camera with sdcard. And I want to somehow copy data to network share without removing sd card from camera. I bought wifi adapter for sd card but in this case I need to constant have lcd enabled in camera to power it, and connct to sd card as client and then using other application download pictures from camera. I prefer to have it more simple. Is it possible to put into camera sd adapter which will be connected to arduino or rpi which will push data from sd adapter to network share.
Any ideas?

I FTP images to a RPi from a ESP32CAM. Perhaps FTP may work for you?

#include "sdkconfig.h" // used for log printing
#include "esp_system.h"
#include "freertos/FreeRTOS.h" //freeRTOS items to be used
#include "freertos/task.h"
#include "certs.h"
#include "esp_camera.h"
#include "soc/soc.h"           // Disable brownout problems
#include "soc/rtc_cntl_reg.h"  // Disable brownout problems
#include "driver/rtc_io.h"
#include <WiFi.h>
#include <WiFiClient.h>
#include "ESP32_FTPClient.h"
#include <PubSubClient.h>
#include <ESP32Time.h>
//
WiFiClient      wifiClient; // do the WiFi instantiation thing
PubSubClient    MQTTclient( mqtt_server, mqtt_port, wifiClient ); //do the MQTT instantiation thing
ESP32_FTPClient ftp (ftp_server, ftp_user, ftp_pass, 5000, 2);
ESP32Time       rtc;
////
//#define evtDoMQTTParse  ( 1 << 0 ) // declare an event
//EventGroupHandle_t eg; // variable for the event group handle
////
SemaphoreHandle_t sema_MQTT_KeepAlive;
SemaphoreHandle_t sema_mqttOK;
////
QueueHandle_t xQ_Message; // payload and topic queue of MQTT payload and topic
const int payloadSize = 300;
struct stu_message
{
  char payload [payloadSize] = {'\0'};
  String topic ;
} x_message;
////
int  mqttOK = 0;
bool TimeSet = false;
bool FlashMode = false;
//
void IRAM_ATTR WiFiEvent(WiFiEvent_t event)
{
  switch (event) {
    case SYSTEM_EVENT_STA_CONNECTED:
      log_i("Connected to WiFi access point");
      break;
    case SYSTEM_EVENT_STA_DISCONNECTED:
      log_i("Disconnected from WiFi access point");
      break;
    case SYSTEM_EVENT_AP_STADISCONNECTED:
      log_i("WiFi client disconnected");
      break;
    default: break;
  }
} // void IRAM_ATTR WiFiEvent(WiFiEvent_t event)
//
void IRAM_ATTR mqttCallback(char* topic, byte * payload, unsigned int length)
{
  // clear locations
  memset( x_message.payload, '\0', payloadSize );
  x_message.topic = ""; //clear string buffer
  x_message.topic = topic;
  int i = 0;
  for ( i; i < length; i++)
  {
    x_message.payload[i] = ((char)payload[i]);
  }
  x_message.payload[i] = '\0';
  xQueueOverwrite( xQ_Message, (void *) &x_message );// send data to queue
} // void mqttCallback(char* topic, byte* payload, unsigned int length)
////
void setup()
{
  pinMode( GPIO_NUM_4, OUTPUT);
  digitalWrite( GPIO_NUM_4, LOW);
  //
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
  //
  //eg = xEventGroupCreate(); // get an event group handle
  //
  x_message.topic.reserve( payloadSize );
  //
  xQ_Message  = xQueueCreate( 1, sizeof(stu_message) );
  //
  sema_mqttOK    =  xSemaphoreCreateBinary();
  xSemaphoreGive( sema_mqttOK );
  //
  xTaskCreatePinnedToCore( MQTTkeepalive, "MQTTkeepalive", 7000, NULL, 3, NULL, 1 );
  xTaskCreatePinnedToCore( fparseMQTT, "fparseMQTT", 9000, NULL, 4, NULL, 1 ); // assign all to core 1, WiFi in use.
  xTaskCreatePinnedToCore( fmqttWatchDog, "fmqttWatchDog", 3000, NULL, 2, NULL, 1 );
  if ( configInitCamera() )
  {
    log_i("        start camera task" );
    xTaskCreatePinnedToCore( capturePhoto_sendFTP, "capturePhoto_sendFTP", 60000, NULL, 6, NULL, 1 );
  } else {
    log_i( "       camera failed to initilize, rebooting in 5." );
    vTaskDelay( 2000 );
    ESP.restart();
  }
} // void setup()
////
void capturePhoto_sendFTP( void *pvParameters )
{
  TickType_t xLastWakeTime    = xTaskGetTickCount();
  const TickType_t xFrequency = 1000 * 5; //delay for mS
  int count = 3;
  //!!!!!Must wait for MQTT connection and proper setup of the sema_MQTT_KeepAlive!!!!
  while ( !MQTTclient.connected() )
  {
    vTaskDelay( 500 );
  }
  for (;;)
  {
    log_i( "tick");
    xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
    if ( count == 3 )
    {
      if ( (wifiClient.connected()) && (WiFi.status() == WL_CONNECTED) )
      {
        camera_fb_t * fb = NULL; // pointer
        if ( FlashMode )
        {
          digitalWrite( GPIO_NUM_4, HIGH );
          vTaskDelay( 20 );
        }
        fb = esp_camera_fb_get();
        digitalWrite( GPIO_NUM_4, LOW );
        if (!fb)
        {
          log_i( "Camera capture failed" );
          esp_camera_fb_return(fb);
        } else
        {
          ftp.OpenConnection(); // try open FTP
          if ( ftp.isConnected() )
          {
            //try send file ftp
            ftp.ChangeWorkDir( ftp_path );
            ftp.DeleteFile( ftp_file_name );
            ftp.InitFile( ftp_file_type ); //"Type I"
            ftp.NewFile( ftp_file_name );
            ftp.WriteData( (unsigned char *)fb->buf, fb->len );
            ftp.CloseFile();
            ftp.CloseConnection();
          }
          esp_camera_fb_return(fb); //return the frame buffer back to the driver for reuse
        }
      }
      count = 0;
    } else {
      camera_fb_t * fb = NULL; // pointer
      digitalWrite( GPIO_NUM_4, HIGH );
      vTaskDelay( 5 );
      fb = esp_camera_fb_get();
      vTaskDelay( 5 );
      digitalWrite( GPIO_NUM_4, LOW );
      esp_camera_fb_return(fb);
    }
    xSemaphoreGive( sema_MQTT_KeepAlive );
    xLastWakeTime = xTaskGetTickCount();
    count++;
    vTaskDelayUntil( &xLastWakeTime, xFrequency );
  }
  vTaskDelete( NULL );
} //void capturePhoto_sendFTP( void *pvParameters )
////
void configureCameraSettings_grpE( int _lenC, int _Hmirror, int _Vflip, int _dcw, int _colorbar )
{
  sensor_t * s = esp_camera_sensor_get();
  s->set_lenc(s, _lenC);         // 0 = disable , 1 = enable
  s->set_hmirror(s, _Hmirror);   // 0 = disable , 1 = enable
  s->set_vflip(s, _Vflip);       // 0 = disable , 1 = enable
  s->set_dcw(s, _dcw);           // 0 = disable , 1 = enable
  ////s->set_colorbar(s, _colorbar); // 0 = disable , 1 = enable
}
////
void configureCameraSettings_grpD( int _gc, int _agc, int _celing, int _bpc, int _wpc, int _gma )
{
  sensor_t * s = esp_camera_sensor_get();
  s->set_gain_ctrl(s, _gc); // 0 = disable , 1 = enable
  s->set_agc_gain(s, _agc); // 0 to 30
  s->set_gainceiling(s, (gainceiling_t)_celing);  // 0 to 6
  s->set_bpc(s, _bpc);      // 0 = disable , 1 = enable
  s->set_wpc(s, _wpc);      // 0 = disable , 1 = enable
  s->set_raw_gma(s, _gma);  // 0 = disable , 1 = enable
}
////
void configureCameraSettings_grpC( int _exctl, int _aec2, int _ae, int _aec )
{
  sensor_t * s = esp_camera_sensor_get();
  s->set_exposure_ctrl(s, _exctl); // 0 = disable , 1 = enable
  s->set_aec2(s, _aec2);           // 0 = disable , 1 = enable
  s->set_ae_level(s, _ae);         // -2 to 2
  ////s->set_aec_value(s, _aec);       // 0 to 1200 CAUSES BLACK IMAGE????
}
////
void configureCameraSettings_grpB( int se, int wb, int awb, int wbmode )
{
  sensor_t * s = esp_camera_sensor_get();
  s->set_special_effect(s, se); // 0 to 6 (0 - No Effect, 1 - Negative, 2 - Grayscale, 3 - Red Tint, 4 - Green Tint, 5 - Blue Tint, 6 - Sepia)
  s->set_whitebal(s, wb);       // 0 = disable , 1 = enable
  s->set_awb_gain(s, awb);      // 0 = disable , 1 = enable
  s->set_wb_mode(s, wbmode);    // 0 to 4 - if awb_gain enabled (0 - Auto, 1 - Sunny, 2 - Cloudy, 3 - Office, 4 - Home)
}
////
void configureCameraSettings_grpA(int brightness, int contrast, int saturation )
{
  if ( ((brightness > -3) && (brightness < 3)) && ((contrast > -3) && (contrast < 3)) && ((saturation > -3) && (saturation < 3)) )
  {
    sensor_t * s = esp_camera_sensor_get();
    s->set_brightness( s, brightness ); // -2 to 2
    s->set_contrast( s, contrast );    // -2 to 2
    s->set_saturation( s, saturation );  // -2 to 2
  }
} //void configureCameraSettings()
////
void configureCameraSettings()
{
  sensor_t * s = esp_camera_sensor_get(); //see certs.h for more info
  s->set_brightness(s, -1);     // -2 to 2 **************************
  s->set_contrast(s, 0);       // -2 to 2
  s->set_saturation(s, 0);     // -2 to 2
  s->set_special_effect(s, 0); // 0 to 6 (0 - No Effect, 1 - Negative, 2 - Grayscale, 3 - Red Tint, 4 - Green Tint, 5 - Blue Tint, 6 - Sepia)
  s->set_whitebal(s, 1);       // 0 = disable , 1 = enable
  s->set_awb_gain(s, 1);       // 0 = disable , 1 = enable
  s->set_wb_mode(s, 0);        // 0 to 4 - if awb_gain enabled (0 - Auto, 1 - Sunny, 2 - Cloudy, 3 - Office, 4 - Home)
  s->set_exposure_ctrl(s, 1);  // 0 = disable , 1 = enable
  s->set_aec2(s, 0);           // 0 = disable , 1 = enable
  s->set_ae_level(s, 0);       // -2 to 2
  s->set_aec_value(s, 300);    // 0 to 1200
  s->set_gain_ctrl(s, 1);      // 0 = disable , 1 = enable
  s->set_agc_gain(s, 0);       // 0 to 30
  s->set_gainceiling(s, (gainceiling_t)0);  // 0 to 6
  s->set_bpc(s, 0);            // 0 = disable , 1 = enable
  s->set_wpc(s, 1);            // 0 = disable , 1 = enable
  s->set_raw_gma(s, 1);        // 0 = disable , 1 = enable
  s->set_lenc(s, 1);           // 0 = disable , 1 = enable
  s->set_hmirror(s, 0);        // 0 = disable , 1 = enable
  s->set_vflip(s, 0);          // 0 = disable , 1 = enable
  s->set_dcw(s, 1);            // 0 = disable , 1 = enable
  s->set_colorbar(s, 0);       // 0 = disable , 1 = enable
} //void configureCameraSettings()
////
bool configInitCamera()
{
  camera_config_t config = {}; // Stores the camera configuration parameters
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer   = LEDC_TIMER_0;
  config.pin_d0       = GPIO_NUM_5; //Y2
  config.pin_d1       = GPIO_NUM_18; //Y3
  config.pin_d2       = GPIO_NUM_19; //Y4
  config.pin_d3       = GPIO_NUM_21; //Y5
  config.pin_d4       = GPIO_NUM_36; //Y6
  config.pin_d5       = GPIO_NUM_39; //Y7
  config.pin_d6       = GPIO_NUM_34; //Y8
  config.pin_d7       = GPIO_NUM_35; // Y9
  config.pin_xclk     = GPIO_NUM_0; //XCLK
  config.pin_pclk     = GPIO_NUM_22; //PCLK
  config.pin_vsync    = GPIO_NUM_25; //VSSYNC
  config.pin_href     = GPIO_NUM_23; // HREF
  config.pin_sscb_sda = GPIO_NUM_26; //SIOD
  config.pin_sscb_scl = GPIO_NUM_27; //SIOC
  config.pin_pwdn     = GPIO_NUM_32; //PWDN
  config.pin_reset    = -1; //RESET
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG; //assuming default is has PSRAM
  config.frame_size = FRAMESIZE_UXGA; // FRAMESIZE_ + QVGA|CIF|VGA|SVGA|XGA|SXGA|UXGA
  config.jpeg_quality = 10; //0-63 lower number means higher quality
  config.fb_count = 2;
  // Initialize the Camera
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    log_i("Camera init failed with error %d", err );
    return false;
  } else {
    configureCameraSettings();
    return true;
  }
} //void configInitCamera()
////
void connectToWiFi()
{
  int TryCount = 0;
  while ( WiFi.status() != WL_CONNECTED )
  {
    TryCount++;
    WiFi.disconnect();
    WiFi.begin( SSID, PASSWORD );
    vTaskDelay( 2500 );
    if ( TryCount == 10 )
    {
      ESP.restart();
    }
  }
  WiFi.onEvent( WiFiEvent );
}
////
void MQTTkeepalive( void *pvParameters )
{
  sema_MQTT_KeepAlive   = xSemaphoreCreateBinary();
  xSemaphoreGive( sema_MQTT_KeepAlive ); // found keep alive can mess with a publish, stop keep alive during publish
  MQTTclient.setKeepAlive( 90 ); // setting keep alive to 90 seconds makes for a very reliable connection, must be set before the 1st connection is made.
  TickType_t xLastWakeTime = xTaskGetTickCount();
  const TickType_t xFrequency = 250; //delay for ms
  for (;;)
  {
    //check for a is-connected and if the WiFi 'thinks' its connected, found checking on both is more realible than just a single check
    if ( (wifiClient.connected()) && (WiFi.status() == WL_CONNECTED) )
    {
      xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY ); // !!!!!whiles MQTTlient.loop() is running no other mqtt operations should be in process!!!!!
      MQTTclient.loop();
      xSemaphoreGive( sema_MQTT_KeepAlive );
    }
    else {
      if ( !(wifiClient.connected()) || !(WiFi.status() == WL_CONNECTED) )
      {
        connectToWiFi();
      }
      connectToMQTT();
    }
    xLastWakeTime = xTaskGetTickCount();
    vTaskDelayUntil( &xLastWakeTime, xFrequency );
  }
  vTaskDelete ( NULL );
}
////
void connectToMQTT()
{
  byte mac[5]; // create client ID from mac address
  WiFi.macAddress(mac); // get mac address
  String clientID = String(mac[0]) + String(mac[4]) ; // use mac address to create clientID
  while ( !MQTTclient.connected() )
  {
    MQTTclient.connect( clientID.c_str(), mqtt_username, mqtt_password );
    vTaskDelay( 250 );
  }
  MQTTclient.setCallback( mqttCallback );
  MQTTclient.subscribe( topicOK );
  MQTTclient.subscribe( topicGrpA );
  MQTTclient.subscribe( topicGrpB );
  MQTTclient.subscribe( topicGrpC );
  MQTTclient.subscribe( topicGrpD );
  MQTTclient.subscribe( topicGrpE );
  MQTTclient.subscribe( topicFlash );
} //void connectToMQTT()
//////
void fmqttWatchDog( void * paramater )
{
  int UpdateImeTrigger = 86400; //seconds in a day
  int UpdateTimeInterval = 85000; // get another reading when = UpdateTimeTrigger
  int maxNonMQTTresponse = 3;
  TickType_t xLastWakeTime = xTaskGetTickCount();
  const TickType_t xFrequency = 60000; //delay for mS
  for (;;)
  {
    xLastWakeTime = xTaskGetTickCount();
    vTaskDelayUntil( &xLastWakeTime, xFrequency );
    xSemaphoreTake( sema_mqttOK, portMAX_DELAY ); // update mqttOK
    mqttOK++;
    xSemaphoreGive( sema_mqttOK );
    if ( mqttOK >= maxNonMQTTresponse )
    {
      log_i( "mqtt watchdog rest" );
      vTaskDelay( 200 );
      ESP.restart();
    }
    UpdateTimeInterval++; // trigger new time get
    if ( UpdateTimeInterval >= UpdateImeTrigger )
    {
      TimeSet = false; // sets doneTime to false to get an updated time after a days count of seconds
      UpdateTimeInterval = 0;
    }
  }
  vTaskDelete( NULL );
} //void fmqttWatchDog( void * paramater )
////
void fparseMQTT( void *pvParameters )
{
  struct stu_message px_message;
  for (;;)
  {
    if ( xQueueReceive(xQ_Message, &px_message, portMAX_DELAY) == pdTRUE )
    {
      xSemaphoreTake( sema_mqttOK, portMAX_DELAY );
      mqttOK = 0;
      xSemaphoreGive( sema_mqttOK );
      if ( !TimeSet)
      {
        if ( String(px_message.topic) == topicOK )
        {
          String temp = "";
          temp        = px_message.payload[0];
          temp        += px_message.payload[1];
          temp        += px_message.payload[2];
          temp        += px_message.payload[3];
          int year    =  temp.toInt();
          temp        = "";
          temp        = px_message.payload[5];
          temp        += px_message.payload[6];
          int month   =  temp.toInt();
          temp        = "";
          temp        = px_message.payload[8];
          temp        += px_message.payload[9];
          int day     =  temp.toInt();
          temp        = "";
          temp        = px_message.payload[11];
          temp        += px_message.payload[12];
          int hour    =  temp.toInt();
          temp        = "";
          temp        = px_message.payload[14];
          temp        += px_message.payload[15];
          int min     =  temp.toInt();
          rtc.setTime( 0, min, hour, day, month, year );
          log_i( "%s   rtc  %s ", px_message.payload, rtc.getTime() );
          TimeSet     = true;
        }
      }
      if ( String(px_message.topic) == topicGrpA )
      {
        //finding first letter
        String sTmp = String( px_message.payload );
        int commaIndex = sTmp.indexOf(',');
        if ( sTmp.substring(0, commaIndex) == "a" );
        {
          int commaIndex = sTmp.indexOf(',');
          int brt =  (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int ctrast = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) ); // chop off begining of message
          int sat = (sTmp.substring(0, commaIndex)).toInt();
          configureCameraSettings_grpA( brt, ctrast, sat );
        }
      }
      if ( String(px_message.topic) == topicGrpB )
      {
        String sTmp = String( px_message.payload );
        int commaIndex = sTmp.indexOf(',');
        if ( sTmp.substring(0, commaIndex) == "b" );
        {
          int commaIndex = sTmp.indexOf(',');
          int se =  (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int wbb = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int wba = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int wbm = (sTmp.substring(0, commaIndex)).toInt();
          configureCameraSettings_grpB( se, wbb, wba, wbm );
        }
      }
      if ( String(px_message.topic) == topicGrpC )
      {
        String sTmp = String( px_message.payload );
        int commaIndex = sTmp.indexOf(',');
        if ( sTmp.substring(0, commaIndex) == "c" );
        {
          int commaIndex = sTmp.indexOf(',');
          int ex =  (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int aec2 = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int ae = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int aec = (sTmp.substring(0, commaIndex)).toInt();
          configureCameraSettings_grpC( ex, aec2, ae, aec );
        }
      }
      if ( String(px_message.topic) == topicGrpD )
      {
        String sTmp = String( px_message.payload );
        int commaIndex = sTmp.indexOf(',');
        if ( sTmp.substring(0, commaIndex) == "d" );
        {
          int commaIndex = sTmp.indexOf(',');
          int gc =  (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int agc = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int celing = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int bpc = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int wpc = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int gma = (sTmp.substring(0, commaIndex)).toInt();
          configureCameraSettings_grpD( gc, agc, celing, bpc, wpc, gma );
        }
      }
      if ( String(px_message.topic) == topicGrpE )
      {
        String sTmp = String( px_message.payload );
        int commaIndex = sTmp.indexOf(',');
        if ( sTmp.substring(0, commaIndex) == "e" );
        {
          int commaIndex = sTmp.indexOf(',');
          int lenC =  (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int Hmirror = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int Vflip = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int dcw = (sTmp.substring(0, commaIndex)).toInt();
          sTmp.remove( 0, (commaIndex + 1) );
          int colorbar = (sTmp.substring(0, commaIndex)).toInt();
          configureCameraSettings_grpE( lenC, Hmirror, Vflip, dcw, colorbar );
        }
      }
      if ( String(px_message.topic) == topicFlash )
      {
        FlashMode = !FlashMode;
      }
    } //if ( xQueueReceive(xQ_Message, &px_message, portMAX_DELAY) == pdTRUE )
  } //for(;;)
  vTaskDelete( NULL );
} // void fparseMQTT( void *pvParameters )
////
void loop() {}

Have you looked at the WiFi enabled SD cards - SD cards with built-in WiFi. I've no experience of them and I think they are fairly expensive. :frowning_face:

I suppose that its no problem to copy data from sdcard connected to rpi(linux) or arduino.

But case is how to connect sd adapter with cables which I will put into nikon camera which in nikon camera should work as sd card. ie. when I make picture on nikon it is automaticly written to sd card, but in this case it will be send to arduino or rpi, and somehow arduino(rpi) should know to write it to connected sd card. Later I can copy it to network drive or mounted drive.
ie.
SDCARD<=1=>(ARDUINO or RPI)<=2=>NIKON
=1= is standard sdcard
=2= how make this connection and take data from it.

I test ezshare:

  1. it require to have LCD constant enabled, to have correct voltage on sdcard. without it it disbled wifi.
  2. In this case I use special application to download it.

I need it for product photography with turntable. And I prefer to not disconnect camera. I need somehow push data from camera to network drive (ethernet or wifi).

Looks like you'll be getting into the nitty gritty of programing your camera to send its images to another thingy. I do not know anything about your camera, good luck to you.

Maybe I wrote it a bit complex.
Normally I put sdcard into camera.
Instead it I want to put sdadapter connected to rpi or arduino. That from camera side it will look stil like sd card.

You'll still need to hack the camera.