microSDPBSaveRev0

const int pbPin1 = 12;   // GPIO pin used to connect pushbutton 1 (digital in) Labeled G12 on board
int pb1State, pb1Cnt=0;   //pb1State≡variable to store the state of Pushbutton 1. pb1Cnt≡variable to store number of times pushbutton 1 has been pressed

#include "FS.h"
#include "SD.h"
#include "SPI.h"

//Function Definitions
void writeFile(fs::FS &fs, const char * path, const char * message){ //To write content to a file - Reference 1
  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){ //To append content to a file without overwriting previous content - Reference 1
  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);
  pinMode(pbPin1,INPUT_PULLUP); //Configure pin tied to Pushbutton 1 as an input and enable the internal pull-up resistor - sets output HIGH so that when button is pressed reading is LOW - tie input between digital pin and ground

  //Initialize the SD Card - See Reference 1
  if(!SD.begin())
  {
  Serial.println("Card Mount Failed");
  return;
  }
  uint8_t cardType = SD.cardType();

  if(cardType == CARD_NONE)
  {
    Serial.println("No SD card attached");
    return;
  }//End of SD Card Initialization

}//End of void setup

void loop() {
  pb1State = digitalRead(pbPin1); //Read the value of Pushbutton 1 (value of either 0 or 1)
  delay(20); //Debouncing Delay
  Serial.println("Pushbutton 1 State is: " + String(pb1State));
  Serial.println("The number of times Pushbutton 1 has been pressed is: " + String(pb1Cnt));
  if (pb1State==LOW)
  {
  pb1Cnt+=1; //Increment the counter by 1 when pushbutton 1 has been pressed
  delay(200); //Gives user time to release the button - don't make it a long press
  }
  String pb1CntS = String(pb1Cnt); //Converts pb1Cnt to a String
  String pb1Cntc = pb1CntS.c_str();
  if(pb1Cnt==1) //First time button is pressed create the file and save the first line with the writeFile function
  {
    writeFile(SD, "/PushbuttonTest.txt", "Pushbutton 1 has been pressed the following number of times: " + pb1Cntc);
  }
  else if (pb1Cnt>1)
  {
    appendFile(SD, "/PushbuttonTest.txt", "Pushbutton 1 has been pressed the following number of times: " + pb1Cntc + "\n");
  }
}

//References
/* Reference 1
  Rui Santos
  Complete project details at https://RandomNerdTutorials.com/esp32-microsd-card-arduino/

  This sketch can be found at: Examples > SD(esp32) > SD_Test
*/