Hey, everybody! Looking to modify the below code to write the values collected by the MPU6050 to a text file on the SD card.
As of right now, everything words beautifully, but the SD card is just written with that sample text, and I don't know how to change that. Any advice would be appreciated.
And if, in the course of looking through it, you figured out a way to start and stop data-writing to the card with a button-press (if such a thing is possible), that'd be cool, too. 
I appreciate you all in advance!
#include <SPI.h>
#include <SD.h>
#include <MPU6050_tockn.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
/*
Library and code have been taken from:
https://github.com/tockn/MPU6050_tockn
Thanks to RoJax for base code. Code modified by Jordan Gaither (2021).
1-MPU6050 Introduction video and code: https://youtu.be/uhh7ik02aDc
2-LCD1602 with I2C module video and code https://youtu.be/q9YC_GVHy5A
*/
// Set the LCD address to 0x27 for a 16 chars and 2 line display
MPU6050 mpu6050(Wire);
LiquidCrystal_I2C lcd(0x27, 16, 2);
File myFile;
int pinCS = 10;
void setup() {
Serial.begin(9600);
Wire.begin();
mpu6050.begin();
mpu6050.calcGyroOffsets(false);
pinMode(pinCS, OUTPUT);
// SD Card Initialization
if (SD.begin())
{
Serial.println("SD card is ready to use.");
} else
{
Serial.println("SD card initialization failed");
return;
}
// Create/Open file
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.println("Writing to file...");
// Write to file
myFile.println("Testing text 1, 2 ,3...");
myFile.close(); // close the file
Serial.println("Done.");
}
// if the file didn't open, print an error:
else {
Serial.println("error opening test.txt");
}
// Reading the file
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("Read:");
// Reading the whole file
while (myFile.available()) {
Serial.write(myFile.read());
}
myFile.close();
}
else {
Serial.println("error opening test.txt");
}
// initialize the LCD,
lcd.begin();
// Turn on the blacklight and print a message.
lcd.backlight();
lcd.clear();
lcd.setCursor (0, 0); //
lcd.setCursor (0, 0); //
lcd.setCursor (0, 0); //
lcd.print("HELLO, SIR.");
delay(1000);
lcd.setCursor (0, 0); //
lcd.print("STAND BY - 3");
lcd.setCursor (0, 1); //
lcd.write(255);
lcd.setCursor (1, 1); //
lcd.write(255);
lcd.setCursor (2, 1); //
lcd.write(255);
lcd.setCursor (3, 1); //
lcd.write(255);
lcd.setCursor (4, 1); //
lcd.write(255);
delay(500);
lcd.setCursor (0, 0); //
lcd.print("STAND BY - 2");
lcd.setCursor (0, 1); //
lcd.write(255);
lcd.setCursor (1, 1); //
lcd.write(255);
lcd.setCursor (2, 1); //
lcd.write(255);
lcd.setCursor (3, 1); //
lcd.write(255);
lcd.setCursor (4, 1); //
lcd.write(255);
lcd.setCursor (5, 1); //
lcd.write(255);
lcd.setCursor (6, 1); //
lcd.write(255);
lcd.setCursor (7, 1); //
lcd.write(255);
lcd.setCursor (8, 1); //
lcd.write(255);
lcd.setCursor (9, 1); //
lcd.write(255);
delay(500);
lcd.setCursor (0, 0); //
lcd.print("STAND BY - 1");
lcd.setCursor (0, 1); //
lcd.write(255);
lcd.setCursor (1, 1); //
lcd.write(255);
lcd.setCursor (2, 1); //
lcd.write(255);
lcd.setCursor (3, 1); //
lcd.write(255);
lcd.setCursor (4, 1); //
lcd.write(255);
lcd.setCursor (5, 1); //
lcd.write(255);
lcd.setCursor (6, 1); //
lcd.write(255);
lcd.setCursor (7, 1); //
lcd.write(255);
lcd.setCursor (8, 1); //
lcd.write(255);
lcd.setCursor (9, 1); //
lcd.write(255);
lcd.setCursor (10, 1); //
lcd.write(255);
lcd.setCursor (11, 1); //
lcd.write(255);
lcd.setCursor (12, 1); //
lcd.write(255);
lcd.setCursor (13, 1); //
lcd.write(255);
lcd.setCursor (14, 1); //
lcd.write(255);
delay(500);
}
void loop() {
mpu6050.update();
Serial.print("angleX : ");
Serial.print(mpu6050.getAngleX());
Serial.print(" angleY : ");
Serial.print(mpu6050.getAngleY());
Serial.print(" angleZ : ");
Serial.println(mpu6050.getAngleZ());
lcd.clear();// clean previous values from screen
lcdDisplay(
mpu6050.getAngleX(), // send angle X
mpu6050.getAngleY(), // send angle Y
mpu6050.getAngleZ() // send angle Z
);
delay(100);
}// loop end
/*
Written by Ahmad Shamshiri for Robojax.com
lcdDisplay(float x, float y, float z)
displays value and title on LCD2004-I2C display
How to use:
just pass the three values and it will display it
lcdDisplay(mpu6050.getAngleX() , mpu6050.getAngleY() , mpu6050.getAngleZ() )
*/
void lcdDisplay(float x, float y, float z)
{
// MPU6050 Demo with LCD2004-I2C Display
lcd.setCursor (0, 0); //
lcd.print("X:");
lcd.setCursor (2, 0); //
lcd.print(x);
lcd.setCursor (9, 0); //
lcd.print("Y:");
lcd.setCursor (11, 0); //
lcd.print(y);
lcd.setCursor (0, 1); //
lcd.print("Z:");
lcd.setCursor (2, 1); //
lcd.print(z);
}