Serial Data Logger with SD card using arduino

Required Parts:
Software:
1. Arduino IDE           Click Here to Download
2. SD Card library      Click Here to Download

Hardware:
1. Arduino Uno
2. SD card module
3. Serial to TTL logic converter


Arduino Code:

// SPI and SD libraries. SPI for connecting SD card to SPI bus.
#include <SPI.h>
#include <SD.h>
const int sdPin = 8;

byte byteRead;

// File variable
File tempsFile;

void setup() {
  // Serial output for when connected to computer
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  Serial.print("Initializing SD card...");
  if(!SD.begin(sdPin)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("Initialization done.");
 }

void loop() {
  // Open SD card for writing
  tempsFile = SD.open("SERIAL.csv", FILE_WRITE);

  if (tempsFile) {

    while(Serial.available()>0)
    {
     byteRead=Serial.read(); 
    // write temps to SD card
    tempsFile.write(byteRead);
    // close the file
    }
    tempsFile.close();
    
  } 
}