Hi everyone im using Adafruit's JPEG camera for my project where im using the snapshot example code for my project in that im transmitting the captured image via bluetooth to an android phone. In the sample code it has several "Serial.print" messages i wanted to get rid of that in order to only transmit the image using Serial.write function in arduino below SD card saving. When i try to ignore these "Serial.print" the camera is not functioning and the SD saving is not done. If anyone can help me with this problem it would be a great help. Thanks
#include <Adafruit_VC0706.h>
#include <SD.h>
#include <SoftwareSerial.h>
#define chipSelect 10
File myFile;
#if ARDUINO >= 100
SoftwareSerial cameraconnection = SoftwareSerial(2, 3);
#else
NewSoftSerial cameraconnection = NewSoftSerial(2, 3);
#endif
Adafruit_VC0706 cam = Adafruit_VC0706(&cameraconnection);
char val;
void setup() {
#if !defined(SOFTWARE_SPI)
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
if(chipSelect != 53) pinMode(53, OUTPUT); // SS on Mega
#else
if(chipSelect != 10) pinMode(10, OUTPUT); // SS on Uno, etc.
#endif
#endif
Serial.begin(38400);
Serial.println("VC0706 Camera snapshot test");
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
}
// Try to locate the camera
}
void loop() {
if(Serial.available())
{
val = Serial.read();
if(val=='a')
{
if (cam.begin()) {
Serial.println("Camera Found:");
} else {
Serial.println("No camera found?");
return;
}
// Print out the camera version information (optional)
char *reply = cam.getVersion();
if (reply == 0) {
Serial.print("Failed to get version");
} else {
Serial.println("-----------------");
Serial.print(reply);
Serial.println("-----------------");
}
//cam.setImageSize(VC0706_640x480); // biggest
//cam.setImageSize(VC0706_320x240); // medium
cam.setImageSize(VC0706_160x120); // small
// You can read the size back from the camera (optional, but maybe useful?)
uint8_t imgsize = cam.getImageSize();
Serial.print("Image size: ");
if (imgsize == VC0706_640x480) Serial.println("640x480");
if (imgsize == VC0706_320x240) Serial.println("320x240");
if (imgsize == VC0706_160x120) Serial.println("160x120");
Serial.println("Snap in 3 secs...");
delay(3000);
if (! cam.takePicture())
Serial.println("Failed to snap!");
else
Serial.println("Picture taken!");
// Create an image with the name IMAGExx.JPG
char filename[13];
strcpy(filename, "IMAGE00.JPG");
for (int i = 0; i < 100; i++) {
filename[5] = '0' + i/10;
filename[6] = '0' + i%10;
// create if does not exist, do not open existing, write, sync after write
if (! SD.exists(filename)) {
break;
}
}
// Open the file for writing
File imgFile = SD.open(filename, FILE_WRITE);
// Get the size of the image (frame) taken
uint16_t jpglen = cam.frameLength();
Serial.print("Storing ");
Serial.print(jpglen, DEC);
Serial.print(" byte image.");
int32_t time = millis();
pinMode(8, OUTPUT);
// Read all the data up to # bytes!
byte wCount = 0; // For counting # of writes
while (jpglen > 0) {
// read 32 bytes at a time;
uint8_t *buffer;
uint8_t bytesToRead = min(32, jpglen); // change 32 to 64 for a speedup but may not work with all setups!
buffer = cam.readPicture(bytesToRead);
imgFile.write(buffer, bytesToRead);
if(++wCount >= 64) { // Every 2K, give a little feedback so it doesn't appear locked up
Serial.print('.');
wCount = 0;
}
//Serial.print("Read "); Serial.print(bytesToRead, DEC); Serial.println(" bytes");
jpglen -= bytesToRead;
}
imgFile.close();
time = millis() - time;
Serial.println("done!");
Serial.print(time); Serial.println(" ms elapsed");
myFile = SD.open("IMAGE00.JPG");
if (myFile) {
while (myFile.available()) {
Serial.write(myFile.read());
}
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
//Serial.println("No BT connections");
}
}
So how are we to know which print statements you removed? Try posting both the
working and non-working sketches in full so the difference can be seen...
The working code is the one i have attached before,
And the code that doesnt work is,
#include <Adafruit_VC0706.h>
#include <SD.h>
#include <SoftwareSerial.h>
#define chipSelect 10
File myFile;
#if ARDUINO >= 100
SoftwareSerial cameraconnection = SoftwareSerial(2, 3);
#else
NewSoftSerial cameraconnection = NewSoftSerial(2, 3);
#endif
Adafruit_VC0706 cam = Adafruit_VC0706(&cameraconnection);
char val;
void setup() {
#if !defined(SOFTWARE_SPI)
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
if(chipSelect != 53) pinMode(53, OUTPUT); // SS on Mega
#else
if(chipSelect != 10) pinMode(10, OUTPUT); // SS on Uno, etc.
#endif
#endif
Serial.begin(38400);
}
void loop() {
if(Serial.available())
{
val = Serial.read();
if(val=='a')
{
//cam.setImageSize(VC0706_640x480); // biggest
//cam.setImageSize(VC0706_320x240); // medium
cam.setImageSize(VC0706_160x120); // small
// You can read the size back from the camera (optional, but maybe useful?)
uint8_t imgsize = cam.getImageSize();
delay(3000);
// Create an image with the name IMAGExx.JPG
char filename[13];
strcpy(filename, "IMAGE00.JPG");
for (int i = 0; i < 100; i++) {
filename[5] = '0' + i/10;
filename[6] = '0' + i%10;
// create if does not exist, do not open existing, write, sync after write
if (! SD.exists(filename)) {
break;
}
}
// Open the file for writing
File imgFile = SD.open(filename, FILE_WRITE);
// Get the size of the image (frame) taken
uint16_t jpglen = cam.frameLength();
int32_t time = millis();
pinMode(8, OUTPUT);
// Read all the data up to # bytes!
byte wCount = 0; // For counting # of writes
while (jpglen > 0) {
// read 32 bytes at a time;
uint8_t *buffer;
uint8_t bytesToRead = min(32, jpglen); // change 32 to 64 for a speedup but may not work with all setups!
buffer = cam.readPicture(bytesToRead);
imgFile.write(buffer, bytesToRead);
if(++wCount >= 64) { // Every 2K, give a little feedback so it doesn't appear locked up
Serial.print('.');
wCount = 0;
}
//Serial.print("Read "); Serial.print(bytesToRead, DEC); Serial.println(" bytes");
jpglen -= bytesToRead;
}
imgFile.close();
time = millis() - time;
Serial.println("done!");
Serial.print(time); Serial.println(" ms elapsed");
myFile = SD.open("IMAGE00.JPG");
if (myFile) {
while (myFile.available()) {
//Serial.println("sending in progress");
Serial.write(myFile.read());
//Serial.write(HEX);
}
//Serial.println("done");
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
//Serial.println("No BT connections");
}
}
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
Yes, it only does a Serial.println() inside the if, but there is one more thing it does that is absolutely necessary if you want to read/write an SD card. Can you think of what it is?
Ohh yea i made a mistake and now i corrected to begin the SD. Thanks for the comment.
And also im facing a problem when transmitting an image from arduino to android through bluetooth. Actually im receiving the bytes and it is stored in the android SD card. But i cannot view the received image but when i compare the bytes of the two image they are exactly the same but still i could not view the received image. Please anyone help me to solve this problem ASAP please.
Ashuk:
... when i compare the bytes of the two image they are exactly the same but still i could not view the received image. Please anyone help me to solve this problem ASAP please.
How are you comparing the two files? If, as you say, they are identical, then either one should display on the same viewer software. Can you send the one captured on the Arduino's SD card to the Android via your PC (copy, etc.). If so, does THAT one display on your Android?
