Wireless SD Shield code?

Projects Programming
1

Hello,
I'm working on this project, using TTL JPEG Camera, Arduino Uno and Wireless SD Shield.
I'm new in coding with Arduino, and I have notice that most people would use SPI for SD Card.

I need your help in this code below, what changes should I make to store the images using Wireless SD Shield instead of SPI?

//  * SD card attached to SPI bus as follows:
//** MOSI - pin 11
// ** MISO - pin 12
// ** CLK - pin 13
// ** CS - pin 4
 
#include <SoftwareSerial.h>
#include <SPI.h>
#include <SD.h>
 
byte ZERO = 0x00;
 
byte incomingbyte;
SoftwareSerial mySerial(0,1);          // Set Arduino pin 0 and 1 as softserial
 
long int a=0x0000,j=0,k=0,count=0,i=0;
uint8_t MH,ML;
boolean EndFlag=0;
 
File  myFile;
 
void SendResetCmd();
void SetBaudRateCmd();
void SetImageSizeCmd();
void SendTakePhotoCmd();
void SendReadDataCmd();
void StopTakePhotoCmd();
 
void setup()
{
 
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
 
mySerial.begin(38400);
 
Serial.print("Initializing SD card...");
// On the Ethernet Shield, CS is pin 4. It's set as an output by default.
// Note that even if it's not used as the CS pin, the hardware SS pin
// (10 on most Arduino boards, 53 on the Mega) must be left as an output
// or the SD library functions will not work.
pinMode(10, OUTPUT);
 
if (!SD.begin(4)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
 
}
 
void loop()
{
 
byte a[32];
int ii;
 
SendResetCmd();
delay(4000);                            //Wait 2-3 second to send take picture command
 
SendTakePhotoCmd();
 
while(mySerial.available()>0)
{
  incomingbyte=mySerial.read();
}
 
myFile = SD.open("pic.jpg", FILE_WRITE); //<strong><span style="color: #ff0000;">The file name should not be too long</span></strong>
 
while(!EndFlag)
{
  j=0;
  k=0;
  count=0;
 
  SendReadDataCmd(); 
  delay(200); //250 for regular
  while(mySerial.available()>0)
  {
     incomingbyte=mySerial.read();
    k++;
    if((k>5)&&(j<32)&&(!EndFlag))
    {
     a[j]=incomingbyte;
     if((a[j-1]==0xFF)&&(a[j]==0xD9))     //tell if the picture is finished
     EndFlag=1;
     j++;
    count++;
    }
  }
 
for(j=0;j<count;j++)
{
if(a[j]<0x10)
Serial.print("0");
Serial.print(a[j],HEX);           // observe the image through serial port
Serial.print(" ");
}
 
for(ii=0; ii<count; ii++)
myFile.write(a[ii]);
 
Serial.println();
 
i++;
 
}
 
myFile.close();
 
Serial.print("Finished writing data to file");
 
while(1);
 
}
 
void SendResetCmd()
{
mySerial.write(0x56);
mySerial.write(ZERO);
mySerial.write(0x26);
mySerial.write(ZERO);
}
 
void SetImageSizeCmd()
{
mySerial.write(0x56);
mySerial.write(ZERO);
mySerial.write(0x31);
mySerial.write(0x05);
mySerial.write(0x04);
mySerial.write(0x01);
mySerial.write(ZERO);
mySerial.write(0x19);
mySerial.write(0x11);
}
 
void SetBaudRateCmd()
{
mySerial.write(0x56);
mySerial.write(ZERO);
mySerial.write(0x24);
mySerial.write(0x03);
mySerial.write(0x01);
mySerial.write(0x2A);
mySerial.write(0xC8);
 
}
 
void SendTakePhotoCmd()
{
mySerial.write(0x56);
mySerial.write(ZERO);
mySerial.write(0x36);
mySerial.write(0x01);
mySerial.write(ZERO);
}
 
void SendReadDataCmd()
{
MH=a/0x100;
ML=a%0x100;
mySerial.write(0x56);
mySerial.write(ZERO);
mySerial.write(0x32);
mySerial.write(0x0c);
mySerial.write(ZERO);
mySerial.write(0x0a);
mySerial.write(ZERO);
mySerial.write(ZERO);
mySerial.write(MH);
mySerial.write(ML);
mySerial.write(ZERO);
mySerial.write(ZERO);
mySerial.write(ZERO);
mySerial.write(0x20);
mySerial.write(ZERO);
mySerial.write(0x0a);
a+=0x20;
}
 
void StopTakePhotoCmd()
{
mySerial.write(0x56);
mySerial.write(ZERO);
mySerial.write(0x36);
mySerial.write(0x01);
mySerial.write(0x03);
}

Thanks!

2

Two things...

  1. What "Wireless SD Shield" are you referring to? If you mean the "official" shield from Arduino.cc, then you are misunderstanding the function of the shield. It isn't a shield for wireless communication to an SD card (which would need a companion board to interface the other end of wireless transmission to an SD card...). This shield allows connection to an X-Bee (or compatible) wireless module and also SPI access to an SD card.

The reason why "most people would use SPI for SD Card" is because both SD cards and many microprocessors (including the ones on Arduinos) have in-built SPI capability.

  1. Did you already modify the code that you provided? I ask because it configures the software serial to use the same pins as the hardware serial port. I've never done this or seen this, but I would imagine it would cause errors.