ESP32 reboots when used with SD Card

bencyp · August 11, 2023, 1:31pm

Hi,

The below code is to get the temperature from AM2315C and store that in the SD Card(RTC for time). There are other things like call feature which I have not yet added.

Once the code reaches to check the SD Card, ESP32 goes into restart loop with the following error:

17:38:10.938 -> A10     : 0x00000005  A11     : 0x00001a3c  A12     : 0x000000df  A13     : 0x00060a23  
17:38:10.938 -> A14     : 0x00060a20  A15     : 0x00000001  SAR     : 0x00000010  EXCCAUSE: 0x0000001c  
17:38:10.938 -> EXCVADDR: 0x0000000c  LBEG    : 0x40087d0d  LEND    : 0x40087d2f  LCOUNT  : 0xffffffff  
17:38:10.972 -> 
17:38:10.972 -> 
17:38:10.972 -> Backtrace: 0x400d46c4:0x3ffc5590 0x400d4310:0x3ffc55b0 0x400d1cee:0x3ffc55e0 0x400d7e42:0x3ffc5620

If I remove the following code, it works fine without the SD card storage:

if (!SD.begin()) {
Serial.println("Card Mount Failed");
return;

#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include "Wire.h"
#include "RTClib.h"
#include <Adafruit_AHTX0.h>
#include <WiFi.h>
#include "DHT.h"  

int HH,MM,DD,c = 0;

RTC_DS3231 rtc;
Adafruit_AHTX0 aht;
String date1;
String time1;
String filename;
String path;
String PHONE = "9841111111";
sensors_event_t humidity, temp;
float t, h;

void getpath() {
  path = "/" + filename;
  Serial.print("Path: ");
  Serial.println(path);
}

void getdate() {
  DateTime now = rtc.now();
  date1 = String (now.timestamp(DateTime::TIMESTAMP_DATE));
  Serial.print("Date: ");
  Serial.println(date1);
  DD = now.day();
  HH = now.hour();
  MM = now.minute();
  //time1 = String((rtc.getTimeStr());
}

void getFileName() {
  File close();
  filename = date1 + ".csv";
  Serial.print("File name: ");
  Serial.println(filename);
  time1 += String(DD);
  time1 += " -";
  time1 += String(HH);
  time1 += " -";
  time1 += String(MM);
  Serial.println(time1);

}

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();
}

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();
}

void writeCallfile(String PH){
String dataString = "";
  dataString += "Call to - ";
  dataString += PH;
   dataString += "at";
   dataString += String(time1);
  dataString += "\r\n";
  Serial.println("dataString-");
  Serial.println(dataString);
  appendFile(SD, path.c_str(), dataString.c_str());

}

void writeTGfile(String PH){
String dataStringTG = "";
  dataStringTG += "Sent TG Message to - ";
  dataStringTG += PH;
   dataStringTG += "at";
   dataStringTG += String(time1);
  dataStringTG += "\r\n";
  Serial.println("dataStringTG-");
  Serial.println(dataStringTG);
  appendFile(SD, path.c_str(), dataStringTG.c_str());

}

void setup() {
  Serial.begin(115200);
    if (! aht.begin()) {
    Serial.println("Could not find AHT? Check wiring");
    while (1) delay(10);
  }
  delay(1000);
 // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));

  if (!SD.begin()) {
    Serial.println("Card Mount Failed");
    return;
  }

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
    delay(200);
  }
  getdate();
  delay(500);
  getFileName();
  delay(500);
  getpath();
  delay(500);
  writeFile(SD, path.c_str(), "Log Details \r\n");
Serial.println("Done");
  delay(500);
}

void loop() {

aht.getEvent(&humidity, &temp);

  t = temp.temperature;
  h = humidity.relative_humidity;

Serial.print(" Temp = ");
Serial.println(t);
Serial.print(" Humidity = ");
Serial.println(h);
/*
if ((t>30)&& (t<32)){
  writeCallfile(PHONE);
  Serial.println("Writing to Card for call");}
  if (t>32){
  writeTGfile(PHONE);
  Serial.println("Writing to Card for TG");
  }
  */
  delay(2000);
}

jim-p · August 11, 2023, 1:43pm

You are calling SD.begin() twice

bencyp · August 11, 2023, 2:14pm

Jim, its only once, I added that to check if that works by disabling the if (!SD.begin()) works. I forgot to remove that line before posting.

ruilviana · August 11, 2023, 2:45pm

You are using very long delays.
This always creates problems on the ESP32.

jim-p · August 11, 2023, 2:45pm

Then I suspect you have the SD card wired incorrectly

bencyp · August 11, 2023, 2:58pm

Jim, I am able to write to the SD card with all other code removed. Below code works with SD card.

// code to write file name based on the date to SD Card


#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include "Wire.h"
#include "RTClib.h"
#include <Adafruit_AHTX0.h>
#include <WiFi.h>
#include "DHT.h"  

int c = 0;

RTC_DS3231 rtc;
Adafruit_AHTX0 aht;
String filename;
String path;
sensors_event_t humidity, temp;
float t, h;

void getpath() {
  path = "/" + filename;
  Serial.print("Path: ");
  Serial.println(path);
}

void getdate() {
  DateTime now = rtc.now();
  date1 = String (now.timestamp(DateTime::TIMESTAMP_DATE));
  Serial.print("Date: ");
  Serial.println(date1);
}

void getFileName() {
  File close();
  filename = date1 + ".csv";
  Serial.print("File name: ");
  Serial.println(filename);


}

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();
}

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();
}


void setup() {
  Serial.begin(115200);
    if (! aht.begin()) {
    Serial.println("Could not find AHT? Check wiring");
    while (1) delay(10);
  }
  delay(1000);


  if (!SD.begin()) {
    Serial.println("Card Mount Failed");
    return;
  }

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
    delay(200);
  }
  getdate();
  delay(500);
  getFileName();
  delay(500);
  getpath();
  delay(500);
  writeFile(SD, path.c_str(), "Log Details \r\n");
Serial.println("Done");
  delay(500);
}

void loop() {

}

jim-p · August 11, 2023, 3:15pm

I can't see why the code you just posted works and the one you posted earlier doesn't.

alanesq · August 11, 2023, 3:20pm

It is always worth considering if the power supply is the issue with things like this. I have experienced all sorts of weird behaviour/errors etc. only after many hours to discover it is the power supply is the issue (I have fallen for this myself many times - lol).
I find it takes a large capacitor across the power feed to smooth out the spikes from wifi access etc.

ruilviana · August 11, 2023, 3:22pm

This second code does not have the delay(2000); in the loop.

bencyp · August 11, 2023, 4:01pm

There is nothing happening in the loop for the delay

bencyp · August 11, 2023, 4:02pm

Power is not an issue, I have given 5V 3A and tried with different supply. I have put 4700uF of capacitor for ESP32 and also to the SD Card Supply .The same code works fine either if I stop the SD begin or remove the AM2315C cable . Works very strange

dingsken · August 11, 2023, 7:16pm

@bencyp Hey Bencyp, I've tried to upload the sketch and saw some errors, because I don't use AHTX0 to measure temp. and humidity, but instead I'm using a DHT22. I also use CS on GPIO2 for the µSD adapter. Try this sketch if you like, you can also decomment the lines and use your libs and sensor. I don't either use the RTCLib but use instead the uRTCLib.
Here's the code:

// Wiring
/*
 * Connect the µSD card module to the following pins:
 *
 * µSD Card module    | ESP32
 *
 * CS                   SD D0/GPIO2
 * MOSI                 MOSI/GPIO23
 * VSS/GND              GND
 * VDD/VCC              5V
 * CLK/SCK              SCK/GPIO18
 * MISO                 MISO/GPIO19
 * Connect following pins from the DHT to the ESP32
 *   DHT      Resistor           ESP32
 *    1          -               3.3V
 *    2         10KΩ between pin 1 and 2
 *    2          -               32
 *    3          -               -
 *    4          -               GND
 * Connect following pins from the DS3231 to the ESP32
 * DS3231          ESP32
 * SDA             GPIO21/I2C1 DA
 * SDL             GPIO22/I2C1 CL
*/

#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include "Wire.h"
#include "uRTCLib.h"
// #include "RTCLib.h"
//#include <Adafruit_AHTX0.h>
#include <WiFi.h>
#include "DHT.h"
int HH, MM, DD, c = 0;
//
uRTCLib rtc(0x68);
// Adafruit_AHTX0 aht; // I'm using DHT22
#define pinDHT22 32          // GPIO 32
#define DHTTYPE DHT22        // define sensor DHT22 (AM2302)
DHT dht(pinDHT22, DHTTYPE);  // Initialise sensor 16mHz use
String date1;
String time1;
String filename;
String path;
String PHONE = "9841111111";
// sensors_event_t humidity, temp;
float t, h;

void getpath() {
  path = "/" + filename;
  Serial.print("Path: ");
  Serial.println(path);
}

void getdate() {
  rtc.refresh();
  Serial.print("Current Date & Time: ");
  Serial.print(rtc.year());
  Serial.print('/');
  Serial.print(rtc.month());
  Serial.print('/');
  Serial.print(rtc.day());
  Serial.print(", time: ");
  Serial.print(rtc.hour());
  Serial.print(':');
  Serial.print(rtc.minute());
  Serial.print(':');
  Serial.println(rtc.second());
  Serial.print("Temperature: ");
  Serial.print(rtc.temp() / 100);
  Serial.print("\xC2\xB0");  //shows degrees character
  Serial.println("C");
  date1 = String(rtc.day());
  date1 += String(rtc.month());
  date1 += "20";
  date1 += String(rtc.year());
  // DateTime now = rtc.now();
  // date1 = String(now.timestamp(DateTime::TIMESTAMP_DATE));
  Serial.print("Date: ");
  Serial.println(date1);
  /*
  DD = now.day();
  HH = now.hour();
  MM = now.minute();*/
  //time1 = String((rtc.getTimeStr());
  DD = rtc.day();
  HH = rtc.hour();
  MM = rtc.minute();
}

void getFileName() {
  File close();
  filename = date1 + ".csv";
  Serial.print("File name: ");
  Serial.println(filename);
  time1 += String(DD);
  time1 += " -";
  time1 += String(HH);
  time1 += " -";
  time1 += String(MM);
  Serial.println(time1);
}

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();
}

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();
}

void writeCallfile(String PH) {
  String dataString = "";
  dataString += "Call to - ";
  dataString += PH;
  dataString += "at";
  dataString += String(time1);
  dataString += "\r\n";
  Serial.println("dataString-");
  Serial.println(dataString);
  appendFile(SD, path.c_str(), dataString.c_str());
}

void writeTGfile(String PH) {
  String dataStringTG = "";
  dataStringTG += "Sent TG Message to - ";
  dataStringTG += PH;
  dataStringTG += "at";
  dataStringTG += String(time1);
  dataStringTG += "\r\n";
  Serial.println("dataStringTG-");
  Serial.println(dataStringTG);
  appendFile(SD, path.c_str(), dataStringTG.c_str());
}

void setup() {
  Serial.begin(115200);
  URTCLIB_WIRE.begin();
  if (!SD.begin(2)) {
    Serial.println("Card Mount Failed");
    return;
  }
  /*if (!aht.begin()) {
    Serial.println("Could not find AHT? Check wiring");
    while (1) delay(10);
  }*/
  // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));

  // Comment out below line once you set the date & time.
  // Following line sets the RTC with an explicit date & time
  // for example to set August 11 2023 at 19:45 you would call:
  rtc.set(0, 45, 19, 5, 11, 8, 23);
  // rtc.set(second, minute, hour, dayOfWeek, dayOfMonth, month, year)
  // set day of week (1=Sunday, 7=Saturday)
  /*
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1)
      ;
    delay(200);
  }*/
  // DHT file
  dht.begin();
  delay(500);
  rtc.refresh();
  getdate();
  getFileName();
  delay(500);
  getpath();
  delay(500);
  writeFile(SD, path.c_str(), "Log Details \r\n");
  Serial.println("Done");
  delay(500);
}

void loop() {

  /*aht.getEvent(&humidity, &temp);

  t = temp.temperature;
  h = humidity.relative_humidity;
  */

  // Reading data
  h = dht.readHumidity();
  t = dht.readTemperature();
  bool DHTErrSuccess;
  DHTErrSuccess = true;
  if (t == NULL || int(t) == NAN) {
    DHTErrSuccess = false;
    return;
  }
  // Decomment to test the output
  /*
  Serial.print(" Temp = ");
  Serial.println(t);
  Serial.print(" Humidity = ");
  Serial.println(h);
  Serial.print("Current Date & Time: ");
  Serial.print(rtc.year());
  Serial.print('/');
  Serial.print(rtc.month());
  Serial.print('/');
  Serial.print(rtc.day());
  */

  if ((t > 30) && (t < 32)) {
    writeCallfile(PHONE);
    Serial.println("Writing to Card for call");
  }
  if (t > 32) {
    writeTGfile(PHONE);
    Serial.println("Writing to Card for TG");
  }
  delay(2000);
}

dingsken · August 11, 2023, 7:18pm

I become in the Serial monitor something like this:

Current Date & Time: 23/8/11, time: 19:45:0
Temperature: 27°C
Date: 1182023
File name: 1182023.csv
11 -19 -45
Path: /1182023.csv
Writing file: /1182023.csv
File written
Done

I use a ESP32 Dev module V4 from AZ delivery:
https://www.az-delivery.de/products/esp-32-dev-kit-c-v4
I hope this sketch will work as you wish, with kind regards.

bencyp · August 12, 2023, 7:21am

Dingsken,
This code seems to work with DHT sensor. I have to see if it works with the AM2315C. Thank you so much for al the help.

dingsken · August 12, 2023, 8:20am

You´re welcome. I´m glad I could help. Sometimes other wiring or another CS can solve problems also. Have fun coding! With kind regards.

system · February 8, 2024, 8:20am

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