ESP32 Forum

Hello,
I am attempting to use this waveshare custom ESP32 board with an SD card reader. I want to display the the images on the SD card to the waveshare EPD. The problem is, I continually get this error when connecting the SD voltage:

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1344
load:0x40078000,len:13864
load:0x40080400,len:3608
entry 0x400805f0

I have tried using an external source for the 5v input to the SD card reader but I get the same result. I have also tried using different GPIOs but to no avail. Any ideas? THANK YOU!!

Pinout attached. CODE:

**********************************************************************************************************

// Libraries for SD card
#include "FS.h"
#include <SD.h>
//#include "mySD.h"
#include <SPI.h>
#include "SD_MMC.h" // SD Card ESP32


// Define CS pin for the SD card module
#define SD_MISO 16
#define SD_MOSI 17
#define SD_SCLK 4
#define SD_CS 2
SPIClass sdSPI(VSPI);

String dataMessage;

void setup() {
// Start serial communication for debugging purposes
Serial.begin(115200);

Serial.println("ESP32 initialized");
uint32_t deadline = millis() + 10 * 1000;
while (static_cast<int32_t>(deadline - millis()) > 0) {
delay(1000);
Serial.println(static_cast<int32_t>(deadline - millis()) / 1000);
}

// Initialize SD card
//SD.begin(SD_CS);
sdSPI.begin(SD_SCLK, SD_MISO, SD_MOSI, SD_CS);
if (!SD.begin(SD_CS, sdSPI)) {
Serial.println("Card Mount Failed");
return;
}
Serial.println("1");
uint8_t cardType = SD.cardType();
if (cardType == CARD_NONE) {
Serial.println("No SD card attached");
return;
}
Serial.println("Initializing SD card...");
if (!SD.begin(SD_CS)) {
Serial.println("ERROR - SD card initialization failed!");
return; // init failed
}
Serial.println("2");
// If the data.txt file doesn't exist
// Create a file on the SD card and write the data labels
File file = SD.open("/data1.txt");
if (!file) {
Serial.println("File doens't exist");
Serial.println("Creating file...");
writeFile(SD, "/data1.txt", "Reading ID, Date, Hour, Temperature \r\n");
}
else {
Serial.println("File already exists");
}
file.close();
logSDCard();

}

void loop() {
// The ESP32 will be in deep sleep
// it never reaches the loop()
}

// Write the sensor readings on the SD card
void logSDCard() {
//dataMessage = String(readingID) + "," + String(dayStamp) + "," + String(timeStamp) + "," +
// String(temperature) + "\r\n";
dataMessage = "Hello World \n";
Serial.print("Save data: ");
Serial.println(dataMessage);
appendFile(SD, "/data1.txt", dataMessage.c_str());
}

// Write to the SD card (DON'T MODIFY THIS FUNCTION)
void writeFile(fs::FS &fs, const char * path, const char * message) {
Serial.printf("Writing file: %s\n", path);

File file = fs.open(path, FILE_WRITE);
if (!file) {
Serial.println("Failed to open file for writing");
return;
}
if (file.print(message)) {
Serial.println("File written");
} else {
Serial.println("Write failed");
}
file.close();
}

// Append data to the SD card (DON'T MODIFY THIS FUNCTION)
void appendFile(fs::FS &fs, const char * path, const char * message) {
Serial.printf("Appending to file: %s\n", path);

File file = fs.open(path, FILE_APPEND);
if (!file) {
Serial.println("Failed to open file for appending");
return;
}
if (file.print(message)) {
Serial.println("Message appended");
} else {
Serial.println("Append failed");
}
file.close();
}

Hey ole_sticky_keys,

did you solve the problem? I am currently at the same point.
Thanks and cheers
saltho

Here is a thread about the TG0WDT_SYS_RESET error.
viewtopic.php?t=3267