SD card initialization failed using a Ethernet shield

DolphinPig28 · November 7, 2018, 2:22am

I tried to make a web server for my website.
I use a Arduino Uno, a Ethernet Shield, and a Samsung EVO 64 GB micro SD card.
The problem is that when I open it on my browser (I type in 192.168.1.20), It's empty.
There's definitely a website there.
When I check my serial monitor, it said:
Initializing SD card...
ERROR - SD card initialization failed!
Here's the code:

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,20);
EthernetServer server(80);

File webFile;

void setup()
{
    Ethernet.begin(mac, ip);
    server.begin();
    Serial.begin(9600); 
    
    // initialize SD card
    Serial.println("Initializing SD card...");
    if (!SD.begin(4)) {
        Serial.println("ERROR - SD card initialization failed!");
        return;
    }
    Serial.println("SUCCESS - SD card initialized.");
    // check for index.htm file
    if (!SD.exists("index.htm")) {
        Serial.println("ERROR - Can't find kyledillon.html file!");
        return;
    }
    Serial.println("SUCCESS - Found kyledillon.html file.");
}

void loop()
{
    EthernetClient client = server.available();

    if (client) {
        boolean currentLineIsBlank = true;
        while (client.connected()) {
            if (client.available()) { 
                char c = client.read();
                if (c == '\n' && currentLineIsBlank) {
                    client.println("HTTP/1.1 200 OK");
                    client.println("Content-Type: text/html");
                    client.println("Connection: close");
                    client.println();
                    webFile = SD.open("kyledillon.html");
                    if (webFile) {
                        while(webFile.available()) {
                            client.write(webFile.read());
                        }
                        webFile.close();
                    }
                    break;
                }
                if (c == '\n') {
                    currentLineIsBlank = true;
                } 
                else if (c != '\r') {
                    currentLineIsBlank = false;
                }
            } 
        }
        delay(1);
        client.stop();
    }
}

I tried the WebServer example and it worked.
Is my SD card not compatible with Arduino?

Juraj · November 7, 2018, 6:32am

try to swap initialization. first SD then Ethernet.

DolphinPig28 · November 7, 2018, 10:38pm

Juraj:
try to swap initialization. first SD then Ethernet.

Sorry!!! I'm a newbie, so, I don't know how to swap initialization. Can you tell me how to do that??? Thank you!!!

pert · November 8, 2018, 12:02am

Here's your code for the initialization of the Ethernet library:

    Ethernet.begin(mac, ip);
    server.begin();

Here's your code for the initialization of the SD library:

    // initialize SD card
    Serial.println("Initializing SD card...");
    if (!SD.begin(4)) {
        Serial.println("ERROR - SD card initialization failed!");
        return;
    }
    Serial.println("SUCCESS - SD card initialized.");

So move the SD initialization code to above the Ethernet initialization code.

DolphinPig28 · November 8, 2018, 1:56am

pert:
Here's your code for the initialization of the Ethernet library:
    Ethernet.begin(mac, ip);

server.begin();

Here's your code for the initialization of the SD library:
// initialize SD card
Serial.println("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("ERROR - SD card initialization failed!");
return;
}
Serial.println("SUCCESS - SD card initialized.");
So move the SD initialization code to above the Ethernet initialization code.

First, I moved the SD initialization to the top.
Then, I see some bugs, such as incorrect file name.
The problem is that there's an error:
Arduino: 1.8.7 (Windows Store 1.8.15.0) (Windows 10), Board: "Arduino/Genuino Uno"
C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.15.0_x86__mdqgnx93n4wtt\libraries\Ethernet\src\EthernetServer.cpp: In member function 'begin':
C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.15.0_x86__mdqgnx93n4wtt\libraries\Ethernet\src\EthernetServer.cpp:38:1: internal compiler error: Segmentation fault
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See http://gcc.gnu.org/bugs.html for instructions.
lto-wrapper.exe: fatal error: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.15.0_x86__mdqgnx93n4wtt\hardware\tools\avr/bin/avr-gcc returned 1 exit status
compilation terminated.
c:/program files/windowsapps/arduinollc.arduinoide_1.8.15.0_x86__mdqgnx93n4wtt/hardware/tools/avr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: error: lto-wrapper failed
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino/Genuino Uno.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

What's wrong? I can't understand what it mean.
This is my new, revised code:

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,20);
EthernetServer server(80);

File webFile;

void setup()
{
    Serial.println("Initializing SD card...");
    if (!SD.begin(4)) {
        Serial.println("ERROR - SD card initialization failed!");
        return;
    }
    
    Ethernet.begin(mac, ip);
    server.begin();
    Serial.begin(9600); 
    
    Serial.println("SUCCESS - SD card initialized.");
    if (!SD.exists("kyledillon.html")) {
        Serial.println("ERROR - Can't find kyledillon.html file!");
        return;
    }
    Serial.println("SUCCESS - Found kyledillon.html file.");
}

void loop()
{
    EthernetClient client = server.available();

    if (client) {
        boolean currentLineIsBlank = true;
        while (client.connected()) {
            if (client.available()) { 
                char c = client.read();
                if (c == '\n' && currentLineIsBlank) {
                    client.println("HTTP/1.1 200 OK");
                    client.println("Content-Type: text/html");
                    client.println("Connection: close");
                    client.println();
                    webFile = SD.open("kyledillon.html");
                    if (webFile) {
                        while(webFile.available()) {
                            client.write(webFile.read());
                        }
                        webFile.close();
                    }
                    break;
                }
                if (c == '\n') {
                    currentLineIsBlank = true;
                } 
                else if (c != '\r') {
                    currentLineIsBlank = false;
                }
            } 
        }
        delay(1);
        client.stop();
    }
}

What should I do???

pert · November 8, 2018, 2:03am

The change you made to the code looks pretty good. The only problem I see is that you forgot to move this line:

Serial.println("SUCCESS - SD card initialized.");

That won't actually break your code but it makes the output from your program not so useful. As is, if the SD initialization code was successful, but the Ethernet initialization code caused the program to hang, then you would never get the output that the SD code worked.

DolphinPig28:
The problem is that there's an error:
Arduino: 1.8.7 (Windows Store 1.8.15.0) (Windows 10), Board: "Arduino/Genuino Uno"

C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.15.0_x86__mdqgnx93n4wtt\libraries\Ethernet\src\EthernetServer.cpp: In member function 'begin':

C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.15.0_x86__mdqgnx93n4wtt\libraries\Ethernet\src\EthernetServer.cpp:38:1: internal compiler error: Segmentation fault

}

^

Please submit a full bug report,

with preprocessed source if appropriate.

See http://gcc.gnu.org/bugs.html for instructions.

lto-wrapper.exe: fatal error: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.15.0_x86__mdqgnx93n4wtt\hardware\tools\avr/bin/avr-gcc returned 1 exit status

compilation terminated.

c:/program files/windowsapps/arduinollc.arduinoide_1.8.15.0_x86__mdqgnx93n4wtt/hardware/tools/avr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: error: lto-wrapper failed

collect2.exe: error: ld returned 1 exit status

exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

This is caused by a bug in the compiler. It is not caused by anything you did wrong.

This bug is specific to the 5.4.0-atmel3.6.1-arduino2 version of avr-gcc used by Arduino AVR Boards 1.6.22 and newer. It has been reported here:

github.com/arduino/Arduino

IDE 1.8.6 - SD-Lib "Datalogger" - segmentation fault

opened 08:35PM - 29 Aug 18 UTC

closed 07:24AM - 23 Sep 19 UTC

mikrocoder

OS: Windows Component: Compilation

Hallo, I have the following sporadic error. Memory is checked with Memtest an…d okay. If I copy the sketch into a new window, no errors will occur. With the older SD-Lib version of IDE 1.8.5 compiles without errors under the new IDE 1.8.6 Windows 10 64Bit ``` Arduino: 1.8.6 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)" C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Worker\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Worker\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Worker\Documents\Arduino\libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -ide-version=10806 -build-path C:\Users\Worker\AppData\Local\Temp\arduino_build_196433 -warnings=all -build-cache C:\Users\Worker\AppData\Local\Temp\arduino_cache_166815 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\libraries\SD\examples\Datalogger\Datalogger.ino C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Worker\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Worker\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Worker\Documents\Arduino\libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -ide-version=10806 -build-path C:\Users\Worker\AppData\Local\Temp\arduino_build_196433 -warnings=all -build-cache C:\Users\Worker\AppData\Local\Temp\arduino_cache_166815 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\libraries\SD\examples\Datalogger\Datalogger.ino Using board 'mega' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr Detecting libraries used... "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10806 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp" -o nul "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10806 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp" -o nul "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10806 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\libraries\\SD\\src" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp" -o nul Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp Using cached library dependencies for file: C:\Program Files (x86)\Arduino\libraries\SD\src\File.cpp Using cached library dependencies for file: C:\Program Files (x86)\Arduino\libraries\SD\src\SD.cpp Using cached library dependencies for file: C:\Program Files (x86)\Arduino\libraries\SD\src\utility\Sd2Card.cpp Using cached library dependencies for file: C:\Program Files (x86)\Arduino\libraries\SD\src\utility\SdFile.cpp Using cached library dependencies for file: C:\Program Files (x86)\Arduino\libraries\SD\src\utility\SdVolume.cpp Generating function prototypes... "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10806 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\libraries\\SD\\src" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp" -o "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\preproc\\ctags_target_for_gcc_minus_e.cpp" "C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\preproc\\ctags_target_for_gcc_minus_e.cpp" Sketch wird kompiliert... "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10806 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\mega" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\libraries\\SD\\src" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp" -o "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp.o" Compiling libraries... Compiling library "SPI" Zuvor kompilierte Datei wird verwendet: C:\Users\Worker\AppData\Local\Temp\arduino_build_196433\libraries\SPI\SPI.cpp.o Compiling library "SD" Zuvor kompilierte Datei wird verwendet: C:\Users\Worker\AppData\Local\Temp\arduino_build_196433\libraries\SD\File.cpp.o Zuvor kompilierte Datei wird verwendet: C:\Users\Worker\AppData\Local\Temp\arduino_build_196433\libraries\SD\SD.cpp.o Zuvor kompilierte Datei wird verwendet: C:\Users\Worker\AppData\Local\Temp\arduino_build_196433\libraries\SD\utility\Sd2Card.cpp.o Zuvor kompilierte Datei wird verwendet: C:\Users\Worker\AppData\Local\Temp\arduino_build_196433\libraries\SD\utility\SdFile.cpp.o Zuvor kompilierte Datei wird verwendet: C:\Users\Worker\AppData\Local\Temp\arduino_build_196433\libraries\SD\utility\SdVolume.cpp.o Compiling core... Using precompiled core: C:\Users\Worker\AppData\Local\Temp\arduino_cache_166815\core\core_arduino_avr_mega_cpu_atmega2560_0c812875ac70eb4a9b385d8fb077f54c.a Linking everything together... "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-gcc" -Wall -Wextra -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections,--relax -mmcu=atmega2560 -o "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433/Datalogger.ino.elf" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\sketch\\Datalogger.ino.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\libraries\\SPI\\SPI.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\libraries\\SD\\File.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\libraries\\SD\\SD.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\libraries\\SD\\utility\\Sd2Card.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\libraries\\SD\\utility\\SdFile.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433\\libraries\\SD\\utility\\SdVolume.cpp.o" "C:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433/..\\arduino_cache_166815\\core\\core_arduino_avr_mega_cpu_atmega2560_0c812875ac70eb4a9b385d8fb077f54c.a" "-LC:\\Users\\Worker\\AppData\\Local\\Temp\\arduino_build_196433" -lm In function 'global constructors keyed to 65535_0_Datalogger.ino.cpp.o': lto1.exe: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. lto-wrapper.exe: fatal error: C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc returned 1 exit status compilation terminated. c:/program files (x86)/arduino/hardware/tools/avr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: error: lto-wrapper failed collect2.exe: error: ld returned 1 exit status Bibliothek SPI in Version 1.0 im Ordner: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI wird verwendet Bibliothek SD in Version 1.2.2 im Ordner: C:\Program Files (x86)\Arduino\libraries\SD wird verwendet exit status 1 Fehler beim Kompilieren für das Board Arduino/Genuino Mega or Mega 2560. ```

Here's the workaround:

Tools > Board > Boards Manager
Wait for downloads to finish.
When you move the mouse pointer over "Arduino AVR Boards", you will see a "Select version" dropdown menu appear. Select "1.6.21".
Click "Install".
Wait for installation to finish.
Click "Close".

If you have File > Preferences > Check for updates on startup checked, the Arduino IDE may occasionally notify you that a new version of Arduino AVR Boards is available, you'll need to refrain from updating back to the new Arduino AVR Boards version, otherwise you'll be back to seeing the segmentation fault error again.

DolphinPig28 · November 9, 2018, 2:29am

pert:
The change you made to the code looks pretty good. The only problem I see is that you forgot to move this line:
Serial.println("SUCCESS - SD card initialized.");
That won't actually break your code but it makes the output from your program not so useful. As is, if the SD initialization code was successful, but the Ethernet initialization code caused the program to hang, then you would never get the output that the SD code worked.
This is caused by a bug in the compiler. It is not caused by anything you did wrong.

This bug is specific to the 5.4.0-atmel3.6.1-arduino2 version of avr-gcc used by Arduino AVR Boards 1.6.22 and newer. It has been reported here:
IDE 1.8.6 - SD-Lib "Datalogger" - segmentation fault · Issue #7949 · arduino/Arduino · GitHub

Here's the workaround:

Tools > Board > Boards Manager

Wait for downloads to finish.

When you move the mouse pointer over "Arduino AVR Boards", you will see a "Select version" dropdown menu appear. Select "1.6.21".

Click "Install".

Wait for installation to finish.

Click "Close".

If you have File > Preferences > Check for updates on startup checked, the Arduino IDE may occasionally notify you that a new version of Arduino AVR Boards is available, you'll need to refrain from updating back to the new Arduino AVR Boards version, otherwise you'll be back to seeing the segmentation fault error again.

I installed the 1.6.21 version and there's no errors when I upload it.
The problem is that in the serial monitor there's NOTHING, no "Initializing SD card...", no "ERROR - SD card initialization failed!", no "SUCCESS - SD card initialized.", no anything.
And when I opened 192.168.1.20, the website won't load.
HELP!!!!!

Juraj · November 9, 2018, 5:58am

Serial.begin?

DolphinPig28 · November 9, 2018, 8:08pm

Juraj:
Serial.begin?

Fixed the Serial problem (I forgot to add Serial.begin() ）.
But in the Serial Monitor, a ERROR - SD card initialization failed! pop up, even through I swapped the initialization.
Here's my new code:

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,20);
EthernetServer server(80);

File webFile;

void setup()
{
    Serial.begin(9600);
    Serial.println("Initializing SD card...");
    if (!SD.begin(4)) {
        Serial.println("ERROR - SD card initialization failed!");
        return;
    }
    Serial.println("SUCCESS - SD card initialized.");
    
    Ethernet.begin(mac, ip);
    server.begin();
    Serial.begin(9600); 
    
    
    if (!SD.exists("kyledillon.html")) {
        Serial.println("ERROR - Can't find kyledillon.html file!");
        return;
    }
    Serial.println("SUCCESS - Found kyledillon.html file.");
}

void loop()
{
    EthernetClient client = server.available();

    if (client) {
        boolean currentLineIsBlank = true;
        while (client.connected()) {
            if (client.available()) { 
                char c = client.read();
                if (c == '\n' && currentLineIsBlank) {
                    client.println("HTTP/1.1 200 OK");
                    client.println("Content-Type: text/html");
                    client.println("Connection: close");
                    client.println();
                    webFile = SD.open("kyledillon.html");
                    if (webFile) {
                        while(webFile.available()) {
                            client.write(webFile.read());
                        }
                        webFile.close();
                    }
                    break;
                }
                if (c == '\n') {
                    currentLineIsBlank = true;
                } 
                else if (c != '\r') {
                    currentLineIsBlank = false;
                }
            } 
        }
        delay(1);
        client.stop();
    }
}

Juraj · November 9, 2018, 8:11pm

try the CardInfo example

DolphinPig28 · November 9, 2018, 10:01pm

Juraj:
try the CardInfo example

I tried it and it said:
Initializing SD card...Wiring is correct and a card is present.

Card type: SDHC
Could not find FAT16/FAT32 partition.
Make sure you've formatted the card

What does it mean???

Juraj · November 10, 2018, 6:58am

format the card in a computer to FAT file system.

DolphinPig28 · November 10, 2018, 8:48pm

Juraj:
format the card in a computer to FAT file system.

What is FAT file system??? Sorry, I'm a newbie, so I don't know what it is (Plus, it's my first time using a SD card).

Juraj · November 10, 2018, 8:52pm

DolphinPig28:
What is FAT file system??? Sorry, I'm a newbie, so I don't know what it is (Plus, it's my first time using a SD card).

a file system with File Allocation Table.
put the card in a computer and format it. it will ask for the file system. choose FAT32

DolphinPig28 · November 11, 2018, 3:04am

I change the format and
Initializing SD card...
SUCCESS - SD card initialized.
ERROR - Can't find Kyle Dillon.html file!
(I realized that the file name is wrong in the code)
Here's my new code:

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,20);
EthernetServer server(80);

File webFile;

void setup()
{
    Serial.begin(9600);
    Serial.println("Initializing SD card...");
    if (!SD.begin(4)) {
        Serial.println("ERROR - SD card initialization failed!");
        return;
    }
    Serial.println("SUCCESS - SD card initialized.");
    
    Ethernet.begin(mac, ip);
    server.begin();
    Serial.begin(9600); 
    
    
    if (!SD.exists("Kyle Dillon.html")) {
        Serial.println("ERROR - Can't find Kyle Dillon.html file!");
        return;
    }
    Serial.println("SUCCESS - Found Kyle Dillon.html file.");
}

void loop()
{
    EthernetClient client = server.available();

    if (client) {
        boolean currentLineIsBlank = true;
        while (client.connected()) {
            if (client.available()) { 
                char c = client.read();
                if (c == '\n' && currentLineIsBlank) {
                    client.println("HTTP/1.1 200 OK");
                    client.println("Content-Type: text/html");
                    client.println("Connection: close");
                    client.println();
                    webFile = SD.open("Kyle Dillon.html");
                    if (webFile) {
                        while(webFile.available()) {
                            client.write(webFile.read());
                        }
                        webFile.close();
                    }
                    break;
                }
                if (c == '\n') {
                    currentLineIsBlank = true;
                } 
                else if (c != '\r') {
                    currentLineIsBlank = false;
                }
            } 
        }
        delay(1);
        client.stop();
    }
}

The picture attached is what I see when I opened the SD card in my computer.

Juraj · November 11, 2018, 6:57am

FAT has 8.3 filename format. try the listfiles example

DolphinPig28 · November 12, 2018, 5:29pm

I tried the fileName example and this is the result:
Initializing SD card...initialization done.
SYSTEM~1/

WPSETT~1.DAT 12*
INDEXE~1 76*
KYLEDI~1.PNG 3342669
KYLEDI~2.PNG 4458614
KYLEDI~1.HTM 3121
KYLEDI~3.PNG 361309
done!
What does it mean???

Juraj · November 12, 2018, 5:35pm

8.3 filename. max 8 characters for name and max 3 for extension. use short file names. the filenames with ~ are the real names of the files. The long names are stored elsewhere and the SD library can't read them.

DolphinPig28 · November 12, 2018, 10:02pm

Thanks!!! It worked!!!

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